SN54F20, SN74F20 DUAL 4-INPUT POSITIVE-NAND GATES SDFS041A – MARCH 1987 – REVISED OCTOBER 1993 • SN54F20 . . . J PACKAGE SN74F20 . . . D OR N PACKAGE (TOP VIEW) Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs 1A 1B NC 1C 1D 1Y GND description These devices contain two independent 4-input NAND gates. They perform the Boolean functions Y = A • B • C • D or Y = A + B + C + D in positive logic. The SN54F20 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74F20 is characterized for operation from 0°C to 70°C. B C D 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 13 3 12 4 11 5 10 6 9 7 8 VCC 2D 2C NC 2B 2A 2Y 1B 1A NC VCC 2D NC NC 1C NC 1D 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 1Y GND NC 2Y 2A A OUTPUT Y 14 2 SN54F20 . . . FK PACKAGE (TOP VIEW) FUNCTION TABLE (each gate) INPUTS 1 NC – No internal connection logic symbol† 1A 1B 1C 1D 2A 2B 2C 2D 1 & 2 6 4 1Y 5 9 10 8 12 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. logic diagram, each gate (positive logic) A B Y C D Copyright 1993, 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 2–1 SN54F20, SN74F20 DUAL 4-INPUT POSITIVE-NAND GATES SDFS041A – MARCH 1987 – REVISED OCTOBER 1993 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA Operating free-air temperature range: SN54F20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74F20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed. recommended operating conditions SN54F20 VCC VIH Supply voltage VIL IIK Low-level input voltage IOH IOL High-level output current Low-level output current TA Operating free-air temperature High-level input voltage SN74F20 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 Input clamp current – 55 UNIT V V 0.8 0.8 V – 18 – 18 mA –1 –1 mA 20 20 mA 70 °C 125 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL II TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V, II = – 18 mA IOH = – 1 mA VCC = 4.75 V, VCC = 4.5 V, IOH = – 1 mA IOL = 20 mA VCC = 5.5 V, VCC = 5.5 V, VI = 7 V VI = 2.7 V VCC = 5.5 V, VCC = 5.5 V, VI = 0.5 V VO = 0 VCC = 5.5 V, VCC = 5.5 V, VI = 0 VI = 4.5 V MIN SN54F20 TYP‡ MAX MIN SN74F20 TYP‡ MAX – 1.2 2.5 3.4 – 1.2 2.5 3.4 0.5 V 0.1 0.1 mA 20 20 µA – 0.6 mA –150 mA 0.9 1.4 mA ICCL 3.4 5.1 3.4 ‡ All typical values are at VCC = 5 V, TA = 25°C. § Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. 5.1 mA IIH IIL IOS§ ICCH 2–2 POST OFFICE BOX 655303 0.5 0.3 V V 2.7 0.3 UNIT – 0.6 – 60 –150 0.9 • DALLAS, TEXAS 75265 1.4 – 60 SN54F20, SN74F20 DUAL 4-INPUT POSITIVE-NAND GATES SDFS041A – MARCH 1987 – REVISED OCTOBER 1993 switching characteristics (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, CL = 50 pF, RL = 500 Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† ′F20 tPLH tPHL A B A, B, C C, or D Y SN54F20 UNIT SN74F20 MIN TYP MAX MIN MAX MIN 1.6 3.3 5 1.2 7 1.6 MAX 6 1 2.8 4.3 1 6.5 1 5.3 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 2: Load circuits and waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–3 SN54F20, SN74F20 DUAL 4-INPUT POSITIVE-NAND GATES SDFS041A – MARCH 1987 – REVISED OCTOBER 1993 2–4 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. 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