HEF4794B 8-stage shift-and-store register LED driver Rev. 04 -- 22 December 2009 Product data sheet 1. General description The HEF4794B is an 8-stage serial shift register. It has a storage latch associated with each stage for strobing data from the serial input (D) to the parallel LED driver outputs (QP0 to QP7). Data is shifted on the positive-going clock (CP) transitions. The data in each shift register stage is transferred to the storage register when the strobe input (STR) is HIGH. Data in the storage register appears at the outputs whenever the output enable input (OE) signal is HIGH. Two serial outputs (QS1 and QS2) are available for cascading a number of HEF4794B devices. Serial data is available at QS1 on positive-going clock edges to allow high-speed operation in cascaded systems with a fast clock rise time. The same serial data is available at QS2 on the next negative going clock edge. This is used for cascading HEF4794B devices when the clock has a slow rise time. It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input. It is also suitable for use over both the industrial (-40 C to +85 C) and automotive (-40 C to +125 C) temperature ranges. 2. Features Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Operates across the automotive temperature range -40 C to +125 C Complies with JEDEC standard JESD 13-B 3. Applications Automotive and industrial 4. Ordering information Table 1. Ordering information All types operate from -40 C to +125 C. Type number Package Name Description Version HEF4794BP DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4 HEF4794BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 5. Functional diagram 2 3 1 CP STR QS1 9 QS2 10 QP0 4 D QP1 5 CP QP2 6 QP3 7 QP4 14 QP5 13 QP6 12 QP7 11 2 9 QS2 QS1 D STR OE 1 8-BIT STORAGE REGISTER 15 OPEN-DRAIN OUTPUTS 4 OE 5 QP0 15 Fig 1. 10 8-STAGE SHIFT REGISTER 3 Fig 2. STAGE 0 D D 14 13 QP4 QP3 12 11 QP6 QP5 QP7 001aag798 Functional diagram STAGES 1 TO 6 Q 7 QP2 QP1 001aaf111 Logic symbol D 6 STAGE 7 Q D Q QS1 CP CP D FF 7 FF 0 CP CP Q QS2 CP LATCH D Q D Q CP CP LATCH 0 LATCH 7 STR OE QP1 Fig 3. QP4 QP2 QP0 QP3 001aag799 QP6 QP5 QP7 Logic diagram HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 2 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 6. Pinning information 6.1 Pinning HEF4794B STR 1 16 VDD D 2 15 OE CP 3 14 QP4 QP0 4 13 QP5 QP1 5 12 QP6 QP2 6 11 QP7 QP3 7 10 QS2 VSS 8 9 QS1 001aag800 Fig 4. Pin configuration HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 3 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 6.2 Pin description Table 2. Pin description Symbol Pin Description D 2 serial input QP0 to QP7 4, 5, 6, 7, 14, 13, 12, 11 parallel output QS1 9 serial output QS2 10 serial output CP 3 clock input STR 1 strobe input OE 15 output enable input VDD 16 supply voltage VSS 8 ground (0 V) 7. Functional description Table 3. Function table[1] Input Parallel output Serial output CP OE STR D QP0 QPn QS1[2] QS2[3] L X X Z Z Q6S no change L X X Z Z n.c. Q7S H L X no change no change Q6S no change H H L Z QPn-1 Q6S no change H H H L QPn-1 Q6S no change H H H no change no change no change Q7S [1] H = HIGH voltage level; L = LOW voltage level; X = don't care; Z = high-impedance OFF-state; = LOW-to-HIGH clock transition; = HIGH-to-LOW clock transition. [2] Q6S = the data in register stage 6 before the LOW to HIGH clock transition. [3] Q7S = the data in register stage 7 before the HIGH to LOW clock transition. HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 4 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver clock input data input strobe input output enable input internal Q0S (FF0) Z-state QP0 output internal Q6S (FF6) Z-state QP6 output serial QS1 output serial QS2 output 001aag801 Fig 5. Timing diagram 8. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter VDD supply voltage IIK input clamping current VI input voltage IOK output clamping current Conditions VI < -0.5 V or VI > VDD + 0.5 V Min Max Unit -0.5 +18 V -0.5 10 VDD + 0.5 mA V QSn outputs; VO < -0.5 V or VO > VDD + 0.5 V - 10 mA QPn outputs; VO < -0.5 V - 40 mA - 10 mA QSn outputs - 10 mA QPn outputs II input current IO output current - 40 mA Tstg storage temperature -65 +150 C Tamb ambient temperature -40 +125 C Ptot total power dissipation P Tamb = -40 C to +125 C DIP16 package [1] - 750 mW SO16 package [2] - 500 mW - 100 mW power dissipation [1] For DIP16 package: Ptot derates linearly with 12 mW/K above 70 C. [2] For SO16 package: Ptot derates linearly with 8 mW/K above 70 C. HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 5 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 9. Recommended operating conditions Table 5. Recommended operating conditions Symbol Parameter Conditions Min Max Unit VDD supply voltage 3 15 V VI input voltage Tamb ambient temperature in free air 0 VDD V -40 +125 C t/V input transition rise and fall rate VDD = 5 V - 3.75 s/V VDD = 10 V - 0.5 s/V VDD = 15 V - 0.08 s/V 10. Static characteristics Table 6. Static characteristics VSS = 0 V; VI = VSS or VDD; unless otherwise specified. Symbol Parameter VIH VIL VOH VOL HIGH-level input voltage Conditions |IO| < 1 A LOW-level input voltage |IO| < 1 A HIGH-level output voltage QSn outputs; |IO| < 1 A LOW-level output voltage IOL II HIGH-level output current LOW-level output current input leakage current Tamb = -40 C Tamb = 25 C Tamb = 85 C Tamb = 125 C Unit Min Max Min Max Min Max Min Max 3.5 - 3.5 - 3.5 - 3.5 - 10 V 7.0 - 7.0 - 7.0 - 7.0 - V 15 V 11.0 - 11.0 - 11.0 - 11.0 - V 5V - 1.5 - 1.5 - 1.5 - 1.5 V 10 V - 3.0 - 3.0 - 3.0 - 3.0 V 15 V - 4.0 - 4.0 - 4.0 - 4.0 V 5V 4.95 - 4.95 - 4.95 - 4.95 - V 10 V 9.95 - 9.95 - 9.95 - 9.95 - V 15 V 14.95 - 14.95 - 14.95 - 14.95 - V 5V 5V - 0.05 - 0.05 - 0.05 - 0.05 V - 0.05 - 0.05 - 0.05 - 0.05 V 15 V - 0.05 - 0.05 - 0.05 - 0.05 V 5V - 0.75 - 0.75 - 1.5 - 1.5 V 10 V - 0.75 - 0.75 - 1.5 - 1.5 V 15 V - 0.75 - 0.75 - 1.5 - 1.5 V 5V -1.7 - -1.4 - -1.1 - -1.1 - mA VO = 4.6 V 5V -0.64 - -0.5 - -0.36 - -0.36 - mA VO = 9.5 V 10 V -1.6 - -1.3 - -0.9 - -0.9 - mA VO = 13.5 V 15 V -4.2 - -3.4 - -2.4 - -2.4 - mA QSn outputs VO = 2.5 V QSn outputs VO = 0.4 V 5V 0.64 - 0.5 - 0.36 - 0.36 - mA VO = 0.5 V 10 V 1.6 - 1.3 - 0.9 - 0.9 - mA VO = 1.5 V 15 V 4.2 - 3.4 - 2.4 - 2.4 - mA 15 V - 0.1 - 0.1 - 1.0 - 1.0 A HEF4794B_4 Product data sheet V 10 V QSn outputs; |IO| < 1 A QP outputs; |IO| < 20 mA IOH VDD (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 6 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver Table 6. Static characteristics ...continued VSS = 0 V; VI = VSS or VDD; unless otherwise specified. Symbol Parameter Conditions VDD Tamb = -40 C Min IOZ IDD CI OFF-state output current supply current QPn output is HIGH; VO = 15 V Tamb = 85 C Tamb = 125 C Unit Min Min Max Max Min Max 5V - 2 - 2 - 15 - 15 A 10 V - 2 - 2 - 15 - 15 A 15 V - 2 - 2 - 15 - 15 A 5V - 5 - 5 - 150 - 150 A 10 V - 10 - 10 - 300 - 300 A 15 V - 20 - 20 - 600 - 600 A - - - - - 7.5 - - - IO = 0 A input capacitance Max Tamb = 25 C - 11. Dynamic characteristics Table 7. Dynamic characteristics VSS = 0 V; Tamb = 25 C unless otherwise specified. For test circuit, see Figure 10. Symbol Parameter Conditions tPHL HIGH to LOW propagation delay CP to QS1; see Figure 6 CP to QS2; see Figure 6 VDD Extrapolation formula Min Typ Max Unit 132 ns + (0.55 ns/pF)CL - 160 320 ns 10 V 53 ns + (0.23 ns/pF)CL - 65 130 ns 15 V 37 ns + (0.16 ns/pF)CL - 45 90 ns 5V 92 ns + (0.55 ns/pF)CL - 120 240 ns 10 V 39 ns + (0.23 ns/pF)CL - 50 100 ns 32 ns + (0.16 ns/pF)CL - 40 80 ns 102 ns + (0.55 ns/pF)CL - 130 260 ns 10 V 44 ns + (0.23 ns/pF)CL - 55 110 ns 15 V 32 ns + (0.16 ns/pF)CL - 40 80 ns 5V 102 ns + (0.55 ns/pF)CL - 130 260 ns 10 V 49 ns + (0.23 ns/pF)CL - 60 120 ns 15 V 37 ns + (0.16 ns/pF)CL 5V [1] 15 V tPLH LOW to HIGH propagation delay CP to QS1; see Figure 6 CP to QS2; see Figure 6 tPZL OFF-state to LOW propagation delay CP to QPn; see Figure 6 STR to QPn; see Figure 7 tPLZ LOW to OFF-state propagation delay CP to QPn; see Figure 6 STR to QPn; see Figure 7 5V [1] - 45 90 ns 5V - 240 480 ns 10 V - 80 160 ns 15 V - 55 110 ns 5V - 140 280 ns 10 V - 70 140 ns 15 V - 55 110 ns 5V - 170 340 ns 10 V - 75 150 ns 15 V - 60 120 ns 5V - 100 200 ns 10 V - 40 100 ns 15 V - 35 70 ns HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 7 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver Table 7. Dynamic characteristics ...continued VSS = 0 V; Tamb = 25 C unless otherwise specified. For test circuit, see Figure 10. Symbol ten Parameter enable time disable time tdis Conditions VDD OE to QPn; see Figure 8 Min Typ Max Unit - 100 200 ns 10 V - 55 110 ns 15 V - 50 100 ns - 80 160 ns - 40 80 ns 5V OE to QPn; see Figure 8 5V Extrapolation formula [2] [2] 10 V 15 V transition time tt QS1, QS2; see Figure 6 5V 10 V [1] [3] 15 V pulse width tW set-up time tsu hold time th fclk(max) maximum clock frequency - 30 60 ns 35 ns + (1.00 ns/pF)CL - 85 170 ns 19 ns + (0.42 ns/pF)CL - 40 80 ns 16 ns + (0.28 ns/pF)CL - 30 60 ns CP; LOW and HIGH; see Figure 6 5V 60 30 - ns 10 V 30 15 - ns 15 V 24 12 - ns STR; HIGH; see Figure 7 5V 80 40 - ns 10 V 60 30 - ns 15 V 24 12 - ns 5V 60 30 - ns 10 V 20 10 - ns 15 V 15 5 - ns 5V +5 -15 - ns 10 V 20 5 - ns 15 V 20 5 - ns D to CP; see Figure 9 D to CP; see Figure 9 CP; see Figure 6 5V 5 10 - MHz 10 V 11 22 - MHz 15 V 14 28 - MHz [1] The typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (CL in pF). [2] ten is the same as tPZL and tdis is the same as tPLZ [3] tt is the same as tTLH and tTHL Table 8. Dynamic power dissipation PD can be calculated from the formulas shown. VSS = 0 V; tr = tf 20 ns; Tamb = 25 C. Symbol Parameter PD VDD dynamic power dissipation 5 V Typical formula PD = 1200 x fi + (fo x CL) x Where VDD2 W 10 V PD = 5550 x fi + (fo x CL) x VDD2 W 15 V PD = 15000 x fi + (fo x CL) x VDD2 W fi = input frequency in MHz; fo = output frequency in MHz; CL = output load capacitance in pF; (fo x CL) = sum of the outputs; VDD = supply voltage in V. HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 8 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 12. Waveforms 1/fclk(max) VI VM CP input VSS tW tW tPLZ tPZL VDD VY QPn output VX VOL tPLH VOH tPHL 90 % VM QS1 output VOL 10 % tTHL tTLH tPLH VOH tPHL 90 % VM QS2 output 10 % VOL tTLH tTHL 001aag222 Parallel output measurement points are given in Table 9. VOL and VOH are typical output voltage levels that occur with the output load. Fig 6. Propagation delay clock (CP) to output (QPn, QS1, QS2), clock pulse width and maximum clock frequency Table 9. Measurement points Supply Input Output VDD VM VM VX VY 5 V to 15 V 0.5VDD 0.5VDD 0.1VO 0.9VO VI VM CP input VSS VI STR input VM VSS VDD tW tPLZ tPZL VY QPn output VOL VX 001aag802 Measurement points are given in Table 9. VOL is the typical output voltage level that occurs with the output load. Fig 7. Strobe (STR) to output (QPn) propagation delays and the strobe pulse width HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 9 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver VI OE input VM VSS tPLZ tPZL VDD output LOW to OFF-state OFF-state to LOW VOL VY VX outputs enabled outputs disabled outputs enabled 001aag803 Measurement points are given in Table 9. VOL is the typical output voltage level that occurs with the output load. Fig 8. Enable and disable times for input OE VI CP input VM VSS tsu tsu th th VI VM D input VSS VDD QPn output VOL 001aag805 Measurement points are given in Table 9. The shaded areas indicate when the input is permitted to change for predictable output performance. VOL is the typical output voltage level that occurs with the output load. Fig 9. Set-up and hold times for the data input (D) HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 10 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver VI 90 % input pulse VSS 10 % tf tr VEXT VDD G VI VO RL DUT CL RT 001aag804 Test data is given in Table 10. Definitions for test circuit: DUT - Device Under Test. RL = Load resistance. CL = load capacitance. RT = Termination resistance should be equal to output impedance of Zo of the pulse generator. VEXT = External voltage for measuring switching times. Fig 10. Test circuit for measuring switching times Table 10. Test data Supply Input VDD VI tr, tf VEXT tPLZ, tPZL tPLH, tPHL Load CL RL 5 V to 15 V VDD 20 ns VDD open 50 pF 1 k HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 11 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 13. Application information Application example: serial-to-parallel data converting LED drivers. VDD VCC QP0 D QP7 S2 HEF4794B OE STR QP0 D HEF4794B OE CP STR QP7 S2 CP PWM dimmer input CONTROL AND SYNC CIRCUITRY 001aag806 data clock from remote control panel Fig 11. Serial-to-parallel converting LED drivers HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 12 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 14. Package outline DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4 ME seating plane D A2 A A1 L c e Z w M b1 (e 1) b b2 MH 9 16 pin 1 index E 1 8 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 b2 c D (1) E (1) e e1 L ME MH w Z (1) max. mm 4.2 0.51 3.2 1.73 1.30 0.53 0.38 1.25 0.85 0.36 0.23 19.50 18.55 6.48 6.20 2.54 7.62 3.60 3.05 8.25 7.80 10.0 8.3 0.254 0.76 inches 0.17 0.02 0.13 0.068 0.051 0.021 0.015 0.049 0.033 0.014 0.009 0.77 0.73 0.26 0.24 0.1 0.3 0.14 0.12 0.32 0.31 0.39 0.33 0.01 0.03 Note 1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 95-01-14 03-02-13 SOT38-4 Fig 12. Package outline SOT38-4 (DIP16) HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 13 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 D E A X c y HE v M A Z 16 9 Q A2 A (A 3) A1 pin 1 index Lp 1 L 8 e 0 detail X w M bp 2.5 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 1.05 1.0 0.4 0.7 0.6 0.25 0.25 0.1 0.7 0.3 0.01 0.019 0.0100 0.39 0.014 0.0075 0.38 0.039 0.016 0.028 0.020 inches 0.010 0.057 0.069 0.004 0.049 0.16 0.15 0.05 0.244 0.041 0.228 0.01 0.01 0.028 0.004 0.012 o 8 o 0 Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT109-1 076E07 MS-012 JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 Fig 13. Package outline SOT109-1 (SO16) HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 14 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 15. Revision history Table 11. Revision history Document ID Release date Data sheet status Change notice Supersedes HEF4794B_4 20091222 Product data sheet - HEF4794B_3 Modifications: * * * * * Section 2 "Features" ESD data removed. Section 8 "Limiting values" IIK values updated. Section 8 "Limiting values" IOK values updated. Section 9 "Recommended operating conditions" t/V values updated. Abbreviations section removed. HEF4794B_3 20080812 Product data sheet - HEF4794B_2 HEF4794B_2 19990630 Product specification - HEF4794B_1 HEF4794B_1 19940701 Product specification - - HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 15 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 16. Legal information 16.1 Data sheet status Document status[1][2] Product status[3] Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. Definition [1] Please consult the most recently issued document before initiating or completing a design. [2] The term `short data sheet' is explained in section "Definitions". [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 16.2 Definitions Draft -- The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet -- A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 16.3 Disclaimers General -- Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. Right to make changes -- NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use -- NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk. Applications -- Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) may cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the Characteristics sections of this document is not implied. Exposure to limiting values for extended periods may affect device reliability. Terms and conditions of sale -- NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by NXP Semiconductors. In case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. No offer to sell or license -- Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 16.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. 17. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com HEF4794B_4 Product data sheet (c) NXP B.V. 2009. All rights reserved. Rev. 04 -- 22 December 2009 16 of 17 HEF4794B NXP Semiconductors 8-stage shift-and-store register LED driver 18. Contents 1 2 3 4 5 6 6.1 6.2 7 8 9 10 11 12 13 14 15 16 16.1 16.2 16.3 16.4 17 18 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 1 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 Functional description . . . . . . . . . . . . . . . . . . . 4 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5 Recommended operating conditions. . . . . . . . 6 Static characteristics. . . . . . . . . . . . . . . . . . . . . 6 Dynamic characteristics . . . . . . . . . . . . . . . . . . 7 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Application information. . . . . . . . . . . . . . . . . . 12 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 15 Legal information. . . . . . . . . . . . . . . . . . . . . . . 16 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 16 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Contact information. . . . . . . . . . . . . . . . . . . . . 16 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section `Legal information'. (c) NXP B.V. 2009. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 22 December 2009 Document identifier: HEF4794B_4