74lvth162373 Fairchild Semiconductor, 74lvth162373 Datasheet - Page 2

• Manufacturer Part Number: 74lvth162373
• Description: Low Voltage 16-bit Transparent Latch With 3-state Outputs And 25ohm Series Resistors In The Outputs
• Manufacturer: Fairchild Semiconductor

www.fairchildsemi.com
Connection Diagram
Functional Description
The LVTH162373 contains sixteen D-type latches with 3-STATE standard outputs. The device is byte controlled with each
byte functioning identically, but independent of the other. Control pins can be shorted together to obtain full 16-bit operation.
The following description applies to each byte. When the Latch Enable (LE
latches. In this condition the latches are transparent, i.e, a latch output will change states each time its D input changes.
When LE
transition of LE
standard outputs are in the 2-state mode. When OE
this does not interfere with entering new data into the latches.
n
is LOW, the latches store information that was present on the D inputs a setup time preceding the HIGH-to-LOW
n
. The 3-STATE standard outputs are controlled by the Output Enable (OE
n
is HIGH, the standard outputs are in the high impedance mode but
2
Pin Descriptions
Truth Tables
H
L
X
Z
O
OE
LE
I
O
o
0
–I
0
LOW Voltage Level
HIGH Impedance
HIGH Voltage Level
Immaterial
Pin Names
n
–O
Previous output prior to HIGH-to-LOW transition of LE
n
15
LE
LE
H
H
X
H
H
X
L
15
L
1
2
n
) input is HIGH, data on the D
OE
OE
Inputs
Inputs
Output Enable Input (Active LOW)
Latch Enable Input
Inputs
3-STATE Outputs
H
L
L
L
H
L
L
L
2
1
n
) input. When OE
I
I
8
Description
0
–I
X
H
X
X
H
X
L
–I
L
15
7
n
n
is LOW, the
Outputs
Outputs
O
O
enters the
8
0
O
O
–O
Z
H
–O
L
Z
H
L
o
o
15
7