SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A - APRIL 1982 - REVISED DECEMBER 1994 * * * SN54ALS139 . . . J PACKAGE SN74ALS139 . . . D OR N PACKAGE (TOP VIEW) Designed Specifically for High-Speed Memory Decoders and Data Transmission Systems Incorporate Two Enable Inputs to Simplify Cascading and /or Data Reception Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 1G 1A 1B 1Y0 1Y1 1Y2 1Y3 GND description The ALS139 are dual 2-line to 4-line decoders/demultiplexers designed for use in high-performance memory-decoding or datarouting applications requiring very short propagation delay times. In high-performance memory systems, these devices can minimize the effects of system decoding. When employed with high-speed memories utilizing a fast-enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. Therefore, the effective system delay introduced by the Schottky-clamped system decoder is negligible. 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC 2G 2A 2B 2Y0 2Y1 2Y2 2Y3 1A 1G NC VCC 2G SN54ALS139 . . . FK PACKAGE (TOP VIEW) 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 2A 2B NC 2Y0 2Y1 1Y3 GND NC 2Y3 2Y2 1B 1Y0 NC 1Y1 1Y2 The ALS139 comprise two individual 2-line to 4-line decoders in a single package. The NC - No internal connection active-low enable (G) input can be used as a data line in demultiplexing applications. These decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line ringing and simplify system design. The SN54ALS139 is characterized for operation over the full military temperature range of - 55C to 125C. The SN74ALS139 is characterized for operation from 0C to 70C. FUNCTION TABLE INPUTS OUTPUTS SELECT ENABLE G B A Y0 Y1 Y2 Y3 H X X H H H H L L L L H H H L L H H L H H L H L H H L H L H H H H H L Copyright 1994, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A - APRIL 1982 - REVISED DECEMBER 1994 logic symbols (alternatives) 1A 1B 1G X/Y 2 4 0 1 3 5 1 1 EN 6 2 7 3 12 2A 2B 2G 14 11 13 10 15 9 1Y0 1A 1Y1 1B 1Y2 1G 2 3 0 1 DMUX 0 G 3 1 3 2Y3 4 5 6 7 12 2Y0 2Y2 1 2 1Y3 2Y1 0 2A 2B 2G 14 11 13 10 15 9 These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. logic diagram (positive logic) 4 Enable 1G 5 6 1A Select Inputs 1B 1Y0 1 1Y1 1Y2 2 7 3 1Y3 Data Outputs 12 Enable 2G 11 10 2A Select Inputs 2B 2Y1 2Y2 14 9 13 Pin numbers shown are for the D, J, and N packages. 2 2Y0 15 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 2Y3 1Y0 1Y1 1Y2 1Y3 2Y0 2Y1 2Y2 2Y3 SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A - APRIL 1982 - REVISED DECEMBER 1994 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Operating free-air temperature range, TA: SN54ALS139 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74ALS139 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. recommended operating conditions SN54ALS139 SN74ALS139 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IOH Low-level input voltage 0.7 0.8 High-level output current - 0.4 - 0.4 mA IOL TA Low-level output current 4 8 mA 70 C High-level input voltage 2 Operating free-air temperature 2 - 55 125 V V 0 V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH SN54ALS139 TYP MAX TEST CONDITIONS MIN VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = - 18 mA IOH = - 0.4 mA VOL VCC = 4 4.5 5V IOL = 4 mA IOL = 8 mA II IIH VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V IIL IO VCC = 5.5 V, VCC = 5.5 V, VI = 0.4 V VO = 2.25 V SN74ALS139 TYP MAX MIN - 1.2 VCC - 2 - 1.2 VCC - 2 0.25 0.4 V V 0.25 0.4 0.35 0.5 V 0.1 0.1 mA 20 20 A - 0.1 mA - 112 mA - 0.1 - 20 UNIT - 112 - 30 ICC VCC = 5.5 V 8 13 8 13 mA All typical values are at VCC = 5 V, TA = 25C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B Y tPLH tPHL G Y VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX SN54ALS139 SN74ALS139 MIN MAX MIN MAX 3 17 3 14 3 17 3 14 3 17 3 14 3 18 3 15 UNIT ns ns For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 SN54ALS139, SN74ALS139 DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS SDAS204A - APRIL 1982 - REVISED DECEMBER 1994 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point From Output Under Test CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.5 V Timing Input Test Point LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V High-Level Pulse 1.3 V R2 1.3 V 1.3 V 0.3 V 0.3 V tsu Data Input tw th 3.5 V 1.3 V 3.5 V Low-Level Pulse 1.3 V 0.3 V 1.3 V 0.3 V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATIONS 3.5 V Output Control (low-level enabling) 1.3 V 1.3 V 0.3 V tPZL Waveform 1 S1 Closed (see Note B) tPLZ [3.5 V 1.3 V tPHZ tPZH Waveform 2 S1 Open (see Note B) 1.3 V VOL 0.3 V VOH 1.3 V 0.3 V [0 V 3.5 V 1.3 V Input 1.3 V 0.3 V tPHL tPLH VOH In-Phase Output 1.3 V 1.3 V VOL tPLH tPHL VOH Out-of-Phase Output (see Note C) 1.3 V 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. When measuring propagation delay items of 3-state outputs, switch S1 is open. D. All input pulses have the following characteristics: PRR 1 MHz, tr = tf = 2 ns, duty cycle = 50%. E. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuits and Voltage Waveforms 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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