CD74HC373, CD74HCT373,
CD54HC573, CD74HC573,
S E M I C O N D U C T O R
CD74HCT573
High Speed CMOS Logic
November 1997
Octal Transparent Latch, Three-State Output
Features
Description
• Common Latch Enable Control
• Common Three-State Output Enable Control
• Buffered Inputs
The Harris CD74HC373, CD74HCT373, CD54HC573,
CD74HC573, and CD74HCT573 are high speed Octal Trans-
parent Latches manufactured with silicon gate CMOS technol-
ogy. They possess the low power consumption of standard
CMOS integrated circuits, as well as the ability to drive 15
LSTTL devices. The CD74HCT373 and CD74HCT573 are
functionally as well as pin compatible with the standard
74LS373 and 74LS573.
• Three-State Outputs
• Bus Line Driving Capacity
• Typical Propagation Delay = 12ns at V
= 5V,
C = 15pF, T = 25 C (Data to Output for HC373)
CC
o
The outputs are transparent to the inputs when the latch
enable (LE) is high. When the latch enable (LE) goes low the
data is latched. The output enable (OE) controls the three-
L
A
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
state outputs. When the output enable (OE) is high the
outputs are in the high impedance state. The latch operation
is independent to the state of the output enable. The 373 and
573 are identical in function and differ only in their pinout
arrangements.
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
Ordering Information
TEMP. RANGE
PKG.
NO.
• HC Types
- 2V to 6V Operation
o
PART NUMBER
CD54HC573F
CD74HC373E
CD74HCT373E
CD74HC573E
CD74HCT573E
CD74HC373M
CD74HCT373M
CD74HC573M
CD74HCT573M
NOTES:
( C)
PACKAGE
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
20 Ld CERDIP F20.3
- High Noise Immunity: N = 30%, N = 30% of V
IL IH CC
at V
= 5V
CC
20 Ld PDIP
20 Ld PDIP
20 Ld PDIP
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld SOIC
20 Ld SOIC
F20.3
E20.3
E20.3
E20.3
M20.3
M20.3
M20.3
M20.3
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V = 0.8V (Max), V = 2V (Min)
IL IH
- CMOS Input Compatibility, I ≤ 1µA at V , V
OL OH
l
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer or die for this part number are available which meets all
electrical specifications. Please contact your local sales office or
Harris customer service for ordering information.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 1679.1
Copyright © Harris Corporation 1997
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