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SN54LV4040A Datasheet(PDF) 2 Page - Texas Instruments

Part No. SN54LV4040A
Description  12-BIT ASYNCHRONOUS BINARY COUNTERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN54LV4040A Datasheet(HTML) 2 Page - Texas Instruments

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SN54LV4040A, SN74LV4040A
12BIT ASYNCHRONOUS BINARY COUNTERS
SCES226I − APRIL 1999 − REVISED MAY 2005
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
The ’LV4040A devices are 12-bit asynchronous binary counters with the outputs of all stages available
externally. A high level at the clear (CLR) input asynchronously clears the counter and resets all outputs low.
The count is advanced on a high-to-low transition at the clock (CLK) input. Applications include time-delay
circuits, counter controls, and frequency-dividing circuits.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
FUNCTION TABLE
(each buffer)
INPUTS
FUNCTION
CLK
CLR
FUNCTION
L
No change
L
Advance to next stage
X
H
All outputs L
logic diagram (positive logic)
Pin numbers shown are for the D, DB, DGV, J, N, NS, PW, RGY, and W packages.
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
95
3
2
4
13
12
14
15
1
11
10
CLR
CLK
QA
QD
QE
QH
QK
QL
QF
QG
QI
QJ
7
QB
6
QC


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