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Details, datasheet, quote on part number:SN54F21J
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Datasheet text preview:
SN54F21, SN74F21 DUAL 4-INPUT POSITIVE-AND GATES
SDFS006A MARCH 1987 REVISED OCTOBER 1993
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Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs
SN54F21 . . . J PACKAGE SN74F21 . . . D OR N PACKAGE (TOP VIEW)
description
These devices contain two independent 4-input AND gates. They perform the Boolean functions Y = A · B · C · D or Y = A + B + C + D in positive logic. The SN54F21 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74F21 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each gate) INPUTS A H L X X X B H X L X X C H X X L X D H X X X L OUTPUT Y H L L L L
1A 1B NC 1C 1D 1Y GND
1 2 3 4 5 6 7
14 13 12 11 10 9 8
VCC 2D 2C NC 2B 2A 2Y
SN54F21 . . . FK PACKAGE (TOP VIEW)
NC NC 1C NC 1D
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
1B 1A NC VCC 2D 2C NC NC NC 2B
NC No internal connection & 6 1Y 8 2Y Y
Copyright © 1993, Texas Instruments Incorporated
logic symbol
1A 1B 1C 1D 2A 2B 2C 2D 1 2 4 5 9 10 12 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 C D
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
1Y GND NC 2Y 2A
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SN54F21, SN74F21 DUAL 4-INPUT POSITIVE-AND GATES
SDFS006A 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: SN54F21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74F21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
SN54F21 MIN VCC VIH VIL IIK IOH IOL TA Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature 55 4.5 2 0.8 18 1 20 125 0 NOM 5 MAX 5.5 MIN 4.5 2 0.8 18 1 20 70 SN74F21 NOM 5 MAX 5.5 UNIT V V V mA mA mA °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VOL II IIH IIL IOS§ ICCH VCC = 4.5 V, VCC = 4.5 V, VCC = 4.75 V, VCC = 4.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, TEST CONDITIONS CONDITIONS II = 18 mA IOH = 1 mA IOH = 1 mA IOL = 20 mA VI = 7 V VI = 2.7 V VI = 0.5 V VO = 0 VI = 4.5 V VI = 0 60 2.8 MIN 2.5 SN54F21 TYP MAX 1.2 3.4 0.3 0.5 0.1 20 0.6 150 4.3 60 2.8 2.5 2.7 0.3 0.5 0.1 20 0.6 150 4.3 7.3 3.4 MIN SN74F21 TYP MAX 1.2 UNIT V V V mA µA mA mA mA mA
ICCL 4.7 7.3 4.7 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.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54F21, SN74F21 DUAL 4-INPUT POSITIVE-AND GATES
SDFS006A MARCH 1987 REVISED OCTOBER 1993
switching characteristics (see Note 2)
VCC = 5 V, CL = 50 pF, RL = 500 , TA = 25°C F21 MIN tPLH tPHL A, B C or D B, C, or Y 1 1.5 TYP 3.2 3.4 MAX 4.7 5.1 VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX SN54F21 MIN 1 1.5 MAX 5.6 5.9 SN74F21 MIN 1 1.5 MAX 5.3 5.5 ns
PARAMETER
FROM (INPUT)
TO (OUTPUT)
UNIT
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
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