SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20 DUAL 4-INPUT POSITIVE-NAND GATES SDAS192B – APRIL 1982 – REVISED DECEMBER 1994 SN54ALS20A, SN54AS20 . . . J PACKAGE SN74ALS20A, SN74AS20 . . . D OR N PACKAGE (TOP VIEW) Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 1A 1B NC 1C 1D 1Y GND description These devices contain two independent 4-input positive-NAND gates. They perform the Boolean functions Y = A • B • C • D or Y = A + B + C + D in positive logic. The SN54ALS20A and SN54AS20 are characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74ALS20A and SN74AS20 are characterized for operation from 0°C to 70°C. B C D OUTPUT Y H H H H L L X X X H X L X X H X X L X H X X X L H 1B 1C 1D 2A 2B 2C 2D 1 3 12 4 11 5 10 6 9 7 8 1B 1A NC VCC NC NC 1C NC 1D VCC 2D 2C NC 2B 2A 2Y 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 2C NC NC NC 2B NC – No internal connection logic symbol† 1A 13 1Y GND NC 2Y 2A A 14 2 SN54ALS20A, SN54AS20 . . . FK PACKAGE (TOP VIEW) FUNCTION TABLE (each gate) INPUTS 1 2D • logic diagram (positive logic) & 1A 2 4 6 1B 1Y 5 1C 1D 1 2 6 4 1Y 5 9 10 12 2A 8 2Y 2B 2C 13 2D 9 10 12 8 2Y 13 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, and N packages. 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 SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20 DUAL 4-INPUT POSITIVE-NAND GATES SDAS192B – 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: SN54ALS20A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74ALS20A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C † 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 SN54ALS20A VCC VIH Supply voltage High-level input voltage SN74ALS20A MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 VIL Low level input voltage Low-level 0.8‡ 0.7§ IOH IOL High-level output current – 0.4 Low-level output current – 55 125 V V 4 TA Operating free-air temperature ‡ Applies over temperature range – 55°C to 70°C § Applies over temperature range 70°C to 125°C UNIT 0 0.8 – 0.4 mA 8 mA 70 °C V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH TEST CONDITIONS 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 ICCH ICCL VCC = 5.5 V, VCC = 5.5 V, VI = 0 VI = 4.5 V SN54ALS20A TYP¶ MAX MIN SN74ALS20A TYP¶ MAX MIN –1.5 VCC – 2 –1.5 VCC – 2 0.25 0.4 V V 0.25 0.4 0.35 0.5 V 0.1 0.1 mA 20 20 µA – 0.1 – 20 UNIT – 112 – 30 – 0.1 mA – 112 mA mA 0.22 0.4 0.22 0.4 0.81 1.5 0.81 1.5 mA ¶ All typical values are at VCC = 5 V, TA = 25°C. # The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20 DUAL 4-INPUT POSITIVE-NAND GATES SDAS192B – APRIL 1982 – REVISED DECEMBER 1994 switching characteristics (see Figure 1) FROM (INPUT) PARAMETER VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† TO (OUTPUT) SN54ALS20A tPLH tPHL A B A, B, C C, or D Y UNIT SN74ALS20A MIN MAX MIN 1 12.5 3 MAX 11 1 11 3 10 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. 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: SN54AS20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74AS20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C ‡ 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 SN54AS20 SN74AS20 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 0.8 0.8 V High-level output current –2 –2 mA IOL TA Low-level output current 20 20 mA 70 °C High-level input voltage 2 Operating free-air temperature 2 – 55 125 V V 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK VOH VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = –18 mA IOH = – 2 mA VOL II VCC = 4.5 V, VCC = 5.5 V, IOL = 20 mA VI = 7 V IIH IIL IO¶ VCC = 5.5 V, VCC = 5.5 V, VI = 2.7 V VI = 0.4 V VCC = 5.5 V, VCC = 5.5 V, VO = 2.25 V VI = 0 ICCH ICCL SN54AS20 TYP§ MAX MIN SN74AS20 TYP§ MAX MIN –1.2 VCC – 2 –1.2 VCC – 2 0.35 – 30 0.5 V V 0.5 V 0.1 0.1 mA 20 20 µA – 0.5 – 0.5 mA – 112 mA 1.6 mA – 112 1 UNIT 1.6 0.35 – 30 1 VCC = 5.5 V, VI = 4.5 V 5.4 8.7 5.4 8.7 mA § All typical values are at VCC = 5 V, TA = 25°C. ¶ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20 DUAL 4-INPUT POSITIVE-NAND GATES SDAS192B – APRIL 1982 – REVISED DECEMBER 1994 switching characteristics (see Figure 1) PARAMETER tPLH tPHL FROM (INPUT) A B A, B, C C, or D TO (OUTPUT) Y VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† SN54AS20 SN74AS20 MIN MAX MIN 1 5.5 1 5 1 5 1 4.5 † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT MAX ns SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20 DUAL 4-INPUT POSITIVE-NAND GATES SDAS192B – 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 Data Input tw th tsu 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 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 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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