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SN54AS27 Dataheets PDF



Part Number SN54AS27
Manufacturers Texas Instruments
Logo Texas Instruments
Description Triple 3-Input Positive-NOR Gate
Datasheet SN54AS27 DatasheetSN54AS27 Datasheet (PDF)

SN54ALS27A, SN54AS27, SN74ALS27A, SN74AS27 TRIPLE 3ĆINPUT POSITIVEĆNOR GATES • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These devices contain three independent 3-input positive-NOR gates. They perform the Boolean functions Y = A • B • C or Y = A + B + C in positive logic. The SN54ALS27A and SN54AS27 are characterized for operation over the full military temperature range of − 55°C t.

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SN54ALS27A, SN54AS27, SN74ALS27A, SN74AS27 TRIPLE 3ĆINPUT POSITIVEĆNOR GATES • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These devices contain three independent 3-input positive-NOR gates. They perform the Boolean functions Y = A • B • C or Y = A + B + C in positive logic. The SN54ALS27A and SN54AS27 are characterized for operation over the full military temperature range of − 55°C to 125°C. The SN74ALS27A and SN74AS27 are characterized for operation from 0°C to 70°C. FUNCTION TABLE (each gate) INPUTS A B C OUTPUT Y H X X L X H X L X X H L L L L H logic symbol† 1 1A ≥1 2 1B 13 1C 3 2A 4 2B 5 2C 9 3A 10 3B 11 3C 12 1Y 6 2Y 8 3Y † 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. SDAS112B − APRIL 1982 − REVISED DECEMBER 1994 SN54ALS27A, SN54AS27 . . . J PACKAGE SN74ALS27A, SN74AS27 . . . D OR N PACKAGE (TOP VIEW) 1A 1 1B 2 2A 3 2B 4 2C 5 2Y 6 GND 7 14 VCC 13 1C 12 1Y 11 3C 10 3B 9 3A 8 3Y SN54ALS27A, SN54AS27 . . . FK PACKAGE (TOP VIEW) 1C VCC NC 1A 1B 3 2 1 20 19 2A 4 18 1Y NC 5 17 NC 2B 6 16 3C NC 7 15 NC 2C 8 14 3B 9 10 11 12 13 3A 3Y NC GND 2Y NC − No internal connection logic diagram (positive logic) 1 1A 2 1B 13 1C 3 2A 4 2B 5 2C 9 3A 10 3B 11 3C 12 1Y 6 2Y 8 3Y 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. Copyright  1994, Texas Instruments Incorporated • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 1 • POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 SN54ALS27A, SN54AS27, SN74ALS27A, SN74AS27 TRIPLE 3ĆINPUT POSITIVEĆNOR GATES SDAS112B − 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: SN54ALS27A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C SN74ALS27A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 VCC VIH Supply voltage High-level input voltage VIL Low-level input voltage IOH High-level output current IOL Low-level output current TA Operating free-air temperature ‡ Applies over temperature range − 55°C to 70°C § Applies over temperature range 70°C to 125°C SN54ALS27A MIN NOM MAX 4.5 5 5.5 2 0.8‡ 0.7§ − 0.4 4 − 55 125 SN74ALS27A MIN NOM MAX 4.5 5 5.5 2 0.8 UNIT V V V −0.4 mA 8 mA 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS27A MIN TYP¶ MAX SN74ALS27A MIN TYP¶ MAX UNIT VIK VCC = 4.5 V, II = −18 mA −1.5 −1.5 V VOH VCC = 4.5 V to 5.5 V, IOH = − 0.4 mA VCC − 2 VCC − 2 V VOL VCC = 4.5 V IOL = 4 mA IOL = 8 mA 0.25 0.4 0.25 0.4 V 0.35 0.5 II VCC = 5.5 V, VI = 7 V 0.1 0.1 mA IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA IIL VCC = 5.5 V, IO# VCC = 5.5 V, VI = 0.4 V VO = 2.25 V − 0.1 −0.1 mA − 20 −112 −30 −112 mA ICCH VCC = 5.5 V, VI = 0 0.97 1.8 0.97 1.8 mA ICCL VCC = 5.5 V, VI = 4.5 V 2 4 2 4 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 • POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 SN54ALS27A, SN54AS27, SN74ALS27A, SN74AS27 TRIPLE 3ĆINPUT POSITIVEĆNOR GATES SDAS112B − APRIL 1982 − REVISED DECEMBER 1994 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† SN54ALS27A SN74ALS27A MIN MAX MIN MAX tPLH .


SN74AS27 SN54AS27 SN54ALS27A


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