CD54HC21_07 Datasheet, PDF (1/13 Pages) Texas Instruments – High-Speed CMOS Logic Dual 4-Input AND Gate

Data sheet acquired from Harris Semiconductor
SCHS131C
August 1997 - Revised September 2003
CD54HC21, CD74HC21,
CD74HCT21
High-Speed CMOS Logic
Dual 4-Input AND Gate
[ /Title
(CD74H
C21,
CD74H
CT21)
/Subject
(High
Speed
CMOS
Logic
Dual 4-
Input
Features
Description
• Buffered Inputs
•
Typical Propagation Delay:
C_L = 15pF, T_A = 25^oC
9ns
at
V_CC
=
5V,
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55^oC to 125^oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC
at V_CC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V_IL= 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l ≤ 1µA at V_OL, V_OH
The ’HC21 and CD74HCT21 logic gates utilize silicon gate
CMOS technology to achieve operating speeds similar to
LSTTL gates with the low power consumption of standard
CMOS integrated circuits. All devices have the ability to drive
10 LSTTL loads. The HCT logic family is functionally pin
compatible with the standard LS logic family.
Ordering Information
PART NUMBER
CD54HC21F3A
CD74HC21E
CD74HC21M
CD74HC21MT
CD74HC21M96
CD74HCT21E
CD74HCT21M
CD74HCT21MT
CD74HCT21M96
TEMP. RANGE
(^oC)
PACKAGE
-55 to 125
14 Ld CERDIP
-55 to 125
14 Ld PDIP
-55 to 125
14 Ld SOIC
-55 to 125
14 Ld SOIC
-55 to 125
14 Ld SOIC
-55 to 125
14 Ld PDIP
-55 to 125
14 Ld SOIC
-55 to 125
14 Ld SOIC
-55 to 125
14 Ld SOIC
NOTE: When ordering, use the entire part number. The suffix 96
denotes tape and reel. The suffix T denotes a small-quantity reel of
250.
Pinout
CD54HC21
(CERDIP)
CD74HC21, CD74HCT21
(PDIP, SOIC)
TOP VIEW
1A 1
1B 2
NC 3
1C 4
1D 5
1Y 6
GND 7
14 V_CC
13 2D
12 2C
11 NC
10 2B
9 2A
8 2Y
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
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