MC74HC373A_14 Datasheet, PDF (1/7 Pages) ON Semiconductor – Octal 3-State Non-Inverting Transparent Latch

MC74HC373A
Octal 3-State Non-Inverting
Transparent Latch
High−Performance Silicon−Gate CMOS
The MC74HC373A is identical in pinout to the LS373. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LSTTL outputs.
These latches appear transparent to data (i.e., the outputs change
asynchronously) when Latch Enable is high. When Latch Enable goes
low, data meeting the setup and hold time becomes latched.
The Output Enable input does not affect the state of the latches, but
when Output Enable is high, all device outputs are forced to the
high−impedance state. Thus, data may be latched even when the
outputs are not enabled.
The HC373A is identical in function to the HC573A which has the
data inputs on the opposite side of the package from the outputs to
facilitate PC board layout.
The HC373A is the non−inverting version of the HC533A.
Features
• Output Drive Capability: 15 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 mA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the JEDEC Standard No. 7.0 A Requirements
• Chip Complexity: 186 FETs or 46.5 Equivalent Gates
• These Devices are Pb−Free and are RoHS Compliant
LOGIC DIAGRAM
DATA
INPUTS
D0 ³
D1 ⁴
D2 ⁷
D3 ⁸
D4 ¹³
D5 ¹⁴
D6 ¹⁷
D7 ¹⁸
2 _Q0
5 _Q1
6 _Q2
9 _Q3
12 _Q4
15 _Q5
16 _Q6
19 _Q7
NONINVERTING
OUTPUTS
LATCH ENABLE ¹¹
OUTPUT ENABLE ¹
PIN 20 = V_CC
PIN 10 = GND
© Semiconductor Components Industries, LLC, 2014
1
August, 2014 − Rev. 15
http://onsemi.com
SOIC−20
DW SUFFIX
CASE 751D
TSSOP−20
DT SUFFIX
CASE 948E
PIN ASSIGNMENT
OUTPUT
ENABLE ¹
Q0 ²
D0 ³
D1 ⁴
Q1 ⁵
Q2 6
D2 7
D3 8
Q3 9
GND 10
20 ^VCC
19 ^Q7
18 ^D7
17 D6
16 Q6
15 Q5
14 D5
13 D4
12 Q4
11 LATCH
ENABLE
MARKING DIAGRAMS
20
HC373A
AWLYYWWG
1
SOIC−20
20
HC
373A
ALYWG
G
1
TSSOP−20
A
WL, L
YY, Y
WW, W
G or G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
FUNCTION TABLE
Inputs
Output Latch
Enable Enable D
L
H
H
L
H
L
L
L
X
H
X
X
Output
Q
H
L
No Change
Z
X = Don’t Care
Z = High Impedance
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
Publication Order Number:
MC74HC373A/D