SN54HC21 GATES Datasheet

SN54HC21 Datasheet, PDF, Equivalent


Part Number

SN54HC21

Description

DUAL 4-INPUT POSITIVE-AND GATES

Manufacture

etcTI

Total Page 21 Pages
Datasheet
Download SN54HC21 Datasheet


SN54HC21
D Wide Operating Voltage Range of 2 V to 6 V
D Outputs Can Drive Up To 10 LSTTL Loads
D Low Power Consumption, 20-µA Max ICC
SN54HC21 . . . J OR W PACKAGE
SN74HC21 . . . D, N, NS, OR PW PACKAGE
(TOP VIEW)
1A
1B
NC
1C
1D
1Y
GND
1
2
3
4
5
6
7
14 VCC
13 2D
12 2C
11 NC
10 2B
9 2A
8 2Y
SN54HC21, SN74HC21
DUAL 4ĆINPUT POSITIVEĆAND GATES
SCLS087E − DECEMBER 1982 − REVISED AUGUST 2003
D Typical tpd = 11 ns
D ±4-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
SN54HC21 . . . FK PACKAGE
(TOP VIEW)
NC
3 2 1 20 19
4 18
2C
NC 5
17 NC
1C 6
16 NC
NC 7
15 NC
1D 8
14 2B
9 10 11 12 13
NC − No internal connection
description/ordering information
These devices contain two independent 4-input AND gates. They perform the Boolean function
Y + A B C D or Y + A ) B ) C ) D in positive logic.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube of 25
SN74HC21N
SN74HC21N
Tube of 50
SN74HC21D
−40°C to 85°C
SOIC − D
SOP − NS
Reel of 2500
Reel of 250
Reel of 2000
SN74HC21DR
SN74HC21DT
SN74HC21NSR
HC21
HC21
Tube of 90
SN74HC21PW
TSSOP − PW
Reel of 2000
Reel of 250
SN74HC21PWR
SN74HC21PWT
HC21
CDIP − J
−55°C to 125°C CFP − W
Tube of 25
Tube of 150
SNJ54HC21J
SNJ54HC21W
SNJ54HC21J
SNJ54HC21W
LCCC − FK
Tube of 55
SNJ54HC21FK
SNJ54HC21FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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
Copyright 2003, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
1

SN54HC21
SN54HC21, SN74HC21
DUAL 4ĆINPUT POSITIVEĆAND GATES
SCLS087E − DECEMBER 1982 − REVISED AUGUST 2003
A
H
L
X
X
X
FUNCTION TABLE
(each gate)
INPUTS
BCD
HHH
XXX
LXX
XLX
XXL
OUTPUT
Y
H
L
L
L
L
logic diagram (positive logic)
1A
1B
1C
1D
1
2
4
5
6 1Y
Pin numbers shown are for the D, J, N, NS, PW, and W packages.
2A
2B
2C
2D
9
10
12
13
8 2Y
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features D Wide Operating Voltage Range of 2 V to 6 V D Outputs Can Drive Up To 10 LSTTL Loads D Low Power Consumption, 20-µA Max ICC SN54HC21 . . . J OR W PACKAGE S N74HC21 . . . D, N, NS, OR PW PACKAGE ( TOP VIEW) 1A 1B NC 1C 1D 1Y GND 1 2 3 4 5 6 7 14 VCC 13 2D 12 2C 11 NC 10 2 B 9 2A 8 2Y SN54HC21, SN74HC21 DUAL 4 INPUT POSITIVEĆAND GATES SCLS087E − DECEMBER 1982 − REVISED AUGUST 2003 D Typical tpd = 11 ns D ±4-mA Output D rive at 5 V D Low Input Current of 1 µ A Max SN54HC21 . . . FK PACKAGE (TOP VI EW) VCC NC 3 2 1 20 19 4 18 2C NC 5 17 NC 1C 6 16 NC NC 7 15 NC 1D 8 14 2B 9 10 11 12 13 2A 2D NC NC GND 1A 1Y 1B 2Y NC − No internal c onnection description/ordering informat ion These devices contain two independe nt 4-input AND gates. They perform the Boolean function Y + A • B • C • D or Y + A ) B ) C ) D in positive logi c. ORDERING INFORMATION TA PACKAGE ORDERABLE PART NUMBER TOP-SIDE MARK ING PDIP − N Tube of 25 SN74HC21N SN74HC21N Tube of 50 SN74HC21D −40°C to 8.
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