Data sheet acquired from Harris Semiconductor
SCHS182
CD74HC373, CD74HCT373,
CD54HC573, CD74HC573,
CD74HCT573
High Speed CMOS Logic
Octal Transparent Latch, Three-State Output
Description
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.
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-
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.
November 1997
Features
鈥?Common Latch Enable Control
[ /Title
(CD74
HC373
,
CD74
HCT37
3,
CD54
HC573
,
CD74
HC573
,
CD74
HCT57
3)
/Sub-
鈥?Common Three-State Output Enable Control
鈥?Buffered Inputs
鈥?Three-State Outputs
鈥?Bus Line Driving Capacity
鈥?Typical Propagation Delay = 12ns at V
CC
= 5V,
C
L
= 15pF, T
A
= 25
o
C (Data to Output for HC373)
鈥?Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
鈥?Wide Operating Temperature Range . . . -55
o
C to 125
o
C
鈥?Balanced Propagation Delay and Transition Times
鈥?Signi鏗乧ant Power Reduction Compared to LSTTL
Logic ICs
鈥?HC Types
- 2V to 6V Operation
- High Noise Immunity: N
IL
= 30%, N
IH
= 30% of V
CC
at V
CC
= 5V
鈥?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
鈮?/div>
1碌A(chǔ) at V
OL
, V
OH
Ordering Information
PART NUMBER
CD54HC573F
CD74HC373E
CD74HCT373E
CD74HC573E
CD74HCT573E
CD74HC373M
CD74HCT373M
CD74HC573M
CD74HCT573M
NOTES:
1. When ordering, use the entire part number. Add the suf鏗亁 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.
TEMP. RANGE
(
o
C)
-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
PACKAGE
20 Ld CERDIP
20 Ld PDIP
20 Ld PDIP
20 Ld PDIP
20 Ld PDIP
20 Ld SOIC
20 Ld SOIC
20 Ld SOIC
20 Ld SOIC
PKG.
NO.
F20.3
F20.3
E20.3
E20.3
E20.3
M20.3
M20.3
M20.3
M20.3
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
漏
Harris Corporation 1997
File Number
1679.1
1
1
2
3
4
5
6
7
8
9
