M74HCT240 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (INVERTED) HIGH SPEED: tPD = 15 ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4A(MAX.) at TA=25C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX) BALANCED PROPAGATION DELAYS: tPLH tPHL SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 240 DESCRIPTION The 74HCT240 is an advanced high-speed CMOS OCTAL BUS BUFFER (3-STATE) fabricated with silicon gate C2MOS technology. G control input governs four BUS BUFFERs. ) (s DIP PACKAGE TUBE t e l o s b O TSSOP u d o r P e ORDER CODES DIP SOP TSSOP ) s ( ct SOP M74HCT240B1R M74HCT240M1R T&R M74HCT240RM13TR M74HCT240TTR All inputs are equipped with protection circuits against static discharge and transient excess voltage. t c u d o r P e t e l o s b O PIN CONNECTION AND IEC LOGIC SYMBOLS August 2001 1/9 M74HCT240 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 Output Enable Input Data Inputs Data Outputs Data Inputs 1Y1 to 1Y4 Data Outputs Output Enable Input Ground (0V) Positive Supply Voltage 2G GND VCC ) s ( ct TRUTH TABLE u d o INPUTS G An L L H L H X X : Don't Care Z : High Impedance ABSOLUTE MAXIMUM RATINGS Symbol ) (s VCC Parameter s b O t c u Supply Voltage VI DC Input Voltage VO DC Output Voltage IIK DC Input Diode Current IOK DC Output Diode Current od ete IO Pr DC Output Current ICC or IGND DC VCC or Ground Current PD Power Dissipation l o s b O Tstg Storage Temperature TL Lead Temperature (10 sec) e t e ol Pr OUTPUT Yn H L Z Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 V -0.5 to VCC + 0.5 20 V mA 20 mA 35 mA 70 mA 500(*) mW -65 to +150 C 300 C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied (*) 500mW at 65 C; derate to 300mW by 10mW/ C from 65C to 85C RECOMMENDED OPERATING CONDITIONS Symbol VCC 2/9 Parameter Value Unit Supply Voltage 4.5 to 5.5 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC V Top Operating Temperature -55 to 125 C tr, tf Input Rise and Fall Time (VCC = 4.5 to 5.5V) 0 to 500 ns M74HCT240 DC SPECIFICATIONS Test Condition Symbol VIH Parameter VIL High Level Input Voltage VOH Low Level Input Voltage VOL II IOZ ICC ICC TA = 25C VCC (V) Min. 4.5 to 5.5 4.5 to 5.5 High Level Output Voltage 4.5 Low Level Output Voltage 4.5 Input Leakage Current High Impedance Output Leakage Current Quiescent Supply Current Additional Worst Case Supply Current Value Typ. Max. 2.0 -40 to 85C -55 to 125C Min. Min. Max. 2.0 0.8 4.4 4.5 4.4 4.4 IO=-6.0 mA 4.18 4.31 4.13 4.10 0.1 IO=6.0 mA 0.17 0.26 5.5 VI = VCC or GND 0.1 5.5 VI = VIH or VIL VO = VCC or GND 5.5 VI = VCC or GND 5.5 Per Input pin VI = 0.5V or VI = 2.4V Other Inputs at VCC or GND ) (s 0.1 V (s) ct u d o 0.33 V 0.8 IO=-20 A 0.0 Max. 2.0 0.8 IO=20 A Unit 0.1 0.40 V V 1 1 A 0.5 5 10 A 4 40 80 A 2.0 2.9 3.0 mA r P e t e l o s b O t c u AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) Symbol d o r P e Parameter let tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time O o s b tPZL tPZH Output Enable Time tPLZ tPHZ Output Disable Time Test Condition VCC (V) CL (pF) 4.5 Value TA = 25C Min. -40 to 85C -55 to 125C Min. Min. Typ. Max. 50 7 12 15 18 4.5 4.5 4.5 4.5 50 150 50 150 15 21 17 23 22 30 30 38 28 38 38 48 33 45 45 57 4.5 50 16 30 38 45 RL = 1 K RL = 1 K Max. Unit Max. ns ns ns ns 3/9 M74HCT240 CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter CIN Input Capacitance COUT Output Capacitance Power Dissipation Capacitance (note 1) CPD Value TA = 25C VCC (V) Min. Typ. Max. 5 10 -40 to 85C -55 to 125C Min. Min. Max. Unit Max. 10 10 pF 10 pF 33 pF ) s ( ct 1) CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = C PD x VCC x fIN + ICC/8 (per circuit) TEST CIRCUIT u d o r P e t e l o ) (s s b O t c u t e l o tPZH, tPHZ TEST P e tPLH, tPHL tPZL, tPLZ d o r CL = 50pF/150pF or equivalent (includes jig and probe capacitance) R1 = 1K or equivalent RT = ZOUT of pulse generator (typically 50) s b O 4/9 SWITCH Open VCC GND M74HCT240 WAVEFORM 1 : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle) ) s ( ct u d o r P e t e l o ) (s s b O WAVEFORM 2 : OUTPUT AND ENABLE TIMES (f=1MHz; 50% duty cycle) t c u d o r P e t e l o s b O 5/9 M74HCT240 Plastic DIP-20 (0.25) MECHANICAL DATA mm. inch DIM. MIN. a1 0.254 B 1.39 TYP MAX. MIN. TYP. MAX. 0.010 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 D ) s ( ct 25.4 E 8.5 e 2.54 e3 22.86 u d o 0.335 7.1 I 3.93 s ( t c 1.34 e t e ol bs O ) 3.3 Z Pr 0.100 F L 1.000 0.900 0.280 0.155 0.130 0.053 u d o r P e t e l o s b O P001J 6/9 M74HCT240 SO-20 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. a1 2.65 MAX. 0.1 0.104 0.2 a2 0.004 0.008 2.45 0.096 b 0.35 0.49 0.014 b1 0.23 0.32 0.009 C 0.5 0.019 ) s ( ct 0.012 0.020 c1 u d o 45 (typ.) D 12.60 13.00 0.496 E 10.00 10.65 0.393 e 1.27 e3 11.43 F 7.40 7.60 L 0.50 1.27 M ) (s S e t e ol s b O 0.75 Pr 0.512 0.419 0.050 0.450 0.291 0.300 0.020 0.050 0.029 8 (max.) t c u d o r P e t e l o s b O PO13L 7/9 M74HCT240 TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 c 0.09 0.20 0.004 D 6.4 6.5 6.6 0.252 E 6.2 6.4 6.6 0.244 E1 4.3 4.4 4.48 1 e bs 0.65 BSC K 0 L 0.45 let o s b 0.60 s ( t c 0.75 du ro P e A2 A1 b 0.260 0.252 0.260 0.173 0.176 0.0256 BSC 0 8 0.018 0.024 O K e 0.030 L E c D E1 PIN 1 IDENTIFICATION 1 0087225C 8/9 0.0089 0.256 u d o r P e A O ) 8 0.012 t e l o 0.169 ) s ( ct M74HCT240 ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O Information furnished is believed to be accurate and reliable. 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