MC74VHCT373A データシートの表示（PDF） - ON Semiconductor

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MC74VHCT373A

Octal D-Type Latch with 3-State Output

ON Semiconductor 

ON Semiconductort

Octal D-Type Latch

with 3-State Output

The MC74VHCT373A is an advanced high speed CMOS octal latch

with 3–state output fabricated with silicon gate CMOS technology. It

achieves high speed operation similar to equivalent Bipolar Schottky

TTL while maintaining CMOS low power dissipation.

This 8–bit D–type latch is controlled by a latch enable input and an

output enable input. When the output enable input is high, the eight

outputs are in a high impedance state.

The internal circuit is composed of three stages, including a buffer

output which provides high noise immunity and stable output.

The VHCT inputs are compatible with TTL levels. This device can

be used as a level converter for interfacing 3.3V to 5.0V, because it has

full 5V CMOS level output swings.

The VHCT373A input and output (when disabled) structures

provide protection when voltages between 0V and 5.5V are applied,

regardless of the supply voltage. These input and output structures

help prevent device destruction caused by supply voltage –

input/output voltage mismatch, battery backup, hot insertion, etc.

• High Speed: tPD = 7.7ns (Typ) at VCC = 5V

• Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C

• TTL–Compatible Inputs: VIL = 0.8V; VIH = 2.0V

• Power Down Protection Provided on Inputs and Outputs

• Balanced Propagation Delays

• Designed for 4.5V to 5.5V Operating Range

• Low Noise: VOLP = 1.6V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300mA

• ESD Performance: HBM > 2000V; Machine Model > 200V

• Chip Complexity: 196 FETs or 49 Equivalent Gates

DATA

INPUTS

D0 3

D1 4

D2 7

D3 8

D4 13

D5 14

D6

D7

17

18

LE 11

1

OE

2 Q0

5 Q1

6 Q2

9 Q3

12 Q4

15 Q5

16 Q6

19 Q7

NONINVERTING

OUTPUTS

Figure 1. Logic Diagram

© Semiconductor Components Industries, LLC, 2001

1

March, 2001 – Rev. 2

MC74VHCT373A

DW SUFFIX

20–LEAD SOIC WIDE PACKAGE

CASE 751D–05

DT SUFFIX

20–LEAD TSSOP PACKAGE

CASE 948E–02

M SUFFIX

20–LEAD SOIC EIAJ PACKAGE

CASE 967–01

ORDERING INFORMATION

MC74VHCTXXXADW SOIC WIDE

MC74VHCTXXXADT TSSOP

MC74VHCTXXXAM SOIC EIAJ

FUNCTION TABLE

INPUTS

OUTPUT

OE

LE

D

Q

L

H

H

H

L

H

L

L

L

L

X

No Change

H

X

X

Z

OE 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 LE

Figure 2. Pin Assignment

Publication Order Number:

MC74VHCT373A/D

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