74AC11898_09 Datasheet, PDF (1/7 Pages) Texas Instruments – 10-bit serial-in parallel-out shift register

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74AC11898
10ĆBIT PARALLELĆOUT SERIAL SHIFT REGISTER
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SCAS143 − OCTOBER 1990 − REVISED APRIL 1993
• AND-Gated (Enable/Disable) Serial Inputs
• Fully Buffered Clock and Serial Inputs
• Direct Clear
• Fully Synchronous Data Transfers
• Flow-Through Architecture Optimizes
PCB Layout
• Center-Pin V_CC and GND Pin Configurations
Minimize High-Speed Switching Noise
• EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
• 500-mA Typical Latch-Up Immunity at 125°C
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
DW OR N PACKAGE
(TOP VIEW)
Q_{C 1}
Q_{D 2}
Q_{E 3}
GND ₄
GND ₅
GND ₆
GND 7
Q_F 8
Q_G 9
Q_H 10
20 ^Q_B
19 ^Q_A
18 ^CLR
17 ^A
16 ^V_CC
15 ^V_CC
14 B
13 CLK
12 Q_J
11 Q_I
description
The 74AC11898 features 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 on the rising edge of the next clock pulse. A high-level input enables the other
input, which then determines the state of the first flip-flop. Data at the serial inputs may be changed while the
clock is high or low provided the minimum setup and hold time requirements are met. Clocking occurs on the
low-to-high transition of the clock input.
The 74AC11898 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
INPUTS
OUTPUTS
CLR CLK A
L
X
X
B
QA QB
...
QJ
X
L
L
L
H
L
X
X QA0 QB0
QJO
H
↑
H
H
H QAN
QIN
H
↑
L
X
L QAN
QIN
H
↑
X
L
L QAN
QIN
H = high level (steady state)
X = irrelevant (any input, including transitions)
↑ = transition from low to high level
QA0, QB0, QJ0 = the level of QA, QB, QJ respectively, before the
indicated steady-state input conditions were established.
Qn, Qin = the level or QA or QJ before the most recent ↑ transition
of the clock; indicates a one-bit shift.
EPIC is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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• POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
Copyright  1993, Texas Instruments Incorporated
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