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HD74ALVCH16373 Datasheet

  • HD74ALVCH16373

  • 16-bit Transparent D-type Latches with 3-state Outputs

  • 50.26KB

  • 11頁

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HD74ALVCH16373
16-bit Transparent D-type Latches with 3-state Outputs
ADE-205-138A (Z)
2nd. Edition
December 1999
Description
The HD74ALVCH16373 is particularly suitable for implementing buffer registers, I/O ports, bidirectional
bus drivers, and working registers. It can be used as two 8-bit latches or one 16-bit latch. When the latch
enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs
are latched at the levels set up at the D inputs. Active bus hold circuitry is provided to hold unused or
floating data inputs at a valid logic level.
Features
鈥?/div>
V
CC
= 2.3 V to 3.6 V
鈥?/div>
Typical V
OL
ground bounce < 0.8 V (@V
CC
= 3.3 V, Ta = 25擄C)
鈥?/div>
Typical V
OH
undershoot > 2.0 V (@V
CC
= 3.3 V, Ta = 25擄C)
鈥?/div>
Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
Function Table
Inputs
OE
L
L
L
H
LE
H
H
L
X
D
H
L
X
X
H
L
Q
0 *1
Z
Output Q
H : High level
L : Low level
X : Immaterial
Z : High impedance
Note: 1. Output level before the indicated steady state input conditions were established.

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