Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Gate and inverter NOR gate 74AS PDIP 14







SDAS112B − APRIL 1982 − REVISED DECEMBER 1994

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

• 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

OUTPUT

A B C

OUTPUT

H X X L

X HX L

X XH L

L L L H

logic symbol

†

logic diagram (positive logic)

≥1

†

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.

SN54ALS27A, SN54AS27 ...J PACKAGE

SN74ALS27A, SN74AS27 ...D OR N PACKAGE

(TOP VIEW)

GND

SN54ALS27A, SN54AS27 . . . FK PACKAGE

(TOP VIEW)

3 2 1 20 19

9 10 11 12 13

NC − No internal connection

GND

   ! "#$ !  %#&'" ($)

(#"! "  !%$""! %$ *$ $!  $+! !#$!

!(( ,-) (#" %"$!!. ($!  $"$!!'- "'#($

$!.  '' %$$!)

Summary of content (18 pages)

PAGE 1
SDAS112B − APRIL 1982 − REVISED DECEMBER 1994 SN54ALS27A, SN54AS27 . . . J PACKAGE SN74ALS27A, SN74AS27 . . . 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 2A 2B 2C 2Y GND description These devices contain three independent 3-input positive-NOR gates.
PAGE 2
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
SDAS112B − 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) SN54ALS27A tPLH tPHL A, B, or C Y UNIT SN74ALS27A MIN MAX MIN MAX 4 26 3 15 1 11 1 9 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
PAGE 4
SDAS112B − APRIL 1982 − REVISED DECEMBER 1994 switching characteristics (see Figure 1) PARAMETER tPLH tPHL FROM (INPUT) TO (OUTPUT) A, B, or C Y VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† SN54AS27 SN74AS27 MIN MAX MIN MAX 1 6.5 1 5.5 1 5 1 4.5 † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
PAGE 5
SDAS112B − 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 CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS 3.5 V High-Level Pulse 1.3 V R2 LOAD CIRCUIT FOR 3-STATE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.
PAGE 6
PACKAGE OPTION ADDENDUM www.ti.
PAGE 7
PACKAGE OPTION ADDENDUM www.ti.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-2013 Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74ALS27ADR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 SN74ALS27ANSR SO NS 14 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ALS27ADR SN74ALS27ANSR SOIC D 14 2500 367.0 367.0 38.0 SO NS 14 2000 367.0 367.0 38.
PAGE 11
PAGE 12
PAGE 13
PAGE 14
PAGE 15
PAGE 16
PAGE 17
PAGE 18
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.