8-Bit Shift Registers
Standard Products
UT54ACS164/UT54ACTS164
8-Bit Shift Registers
Datasheet November 2010 www.aeroflex.com/logic
FEATURES ...
Description
Standard Products
UT54ACS164/UT54ACTS164
8-Bit Shift Registers
Datasheet November 2010 www.aeroflex.com/logic
FEATURES AND-gated (enable/disable) serial inputs Fully buffered clock and serial inputs Direct clear 1.2μ CMOS
- Latchup immune High speed Low power consumption Single 5 volt supply Available QML Q or V processes Flexible package
- 14-pin DIP
- 14-lead flatpack UT54ACS164 - SMD 5962-96556 UT54ACTS164 - SMD 5962-96557
DESCRIPTION
The UT54ACS164 and the UT54ACTS164 are 8-bit shift registers which feature AND-gated serial inputs and an asynchronous clear. The gated serial inputs (A and B) permit complete control over incoming data. A low at either input inhibits entry of new data and resets the first flip-flop to the low level at the next clock pulse. A high-level at both serial inputs sets the first flip-flop to the high level at the next clock pulse. Data at the serial inputs may be changed while the clock is high or low, providing the minimum setup time requirements are met. Clocking occurs on the low-to-high-level transition of the clock input.
The devices are characterized over full military temperature range of -55°C to +125°C.
FUNCTION TABLE
INPUTS
OUTPUTS
CLR L
CLK X
A X
B QA
QB ... QH
XLLL
H
L
X
X
QA0
QB0
QH0
H
↑
H
H
H
QAn
QGn
H
↑
L
X
L
QAn
QGn
H
↑
X
L
L
QAn
QGn
PINOUTS
A B QA QB QC QD VSS
14-Pin DIP Top View
A 1 14 VDD
B 2 13 QH
QA 3 12 QG QB 4 11 QF QC 5 10 QE
QD 6 VSS 7
9 CLR 8 CLK
14-Lea...
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