74ACT11194 Datasheet, PDF (1/55 Pages) Texas Instruments – 4-BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER

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74ACT11194
4ĆBIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER
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SCAS094 − NOVEMBER 1989 − REVISED APRIL 1993
• Inputs Are TTL-Voltage Compatible
• Parallel-to-Serial, Serial-to-Parallel
Conversions
• Left or Right Shifts
• Parallel Synchronous Loading
• Direct Overriding Clear
• Temporary Data Latching Capability
• Center-Pin V_CC and GND Configurations
Minimize High-Speed Switching Noise
• EPICt (Enhanced-Performance Implanted
CMOS) 1-mm 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)
SR SER 1
Q_A 2
Q_B 3
GND 4
GND 5
GND 6
GND 7
Q_C 8
Q_D 9
SL SER 10
20 S0
19 S1
18 A
17 B
16 V_CC
15 V_CC
14 C
13 D
12 CLR
11 CLK
description
This bidirectional shift register features parallel outputs, right-shift and left-shift serial inputs,
operating-mode-control inputs, and a direct overriding clear line. The register has four distinct modes of
operation, namely:
Parallel (broadside) load
Shift right (in the direction Q_A toward Q_D)
Shift left (in the direction Q_D toward Q_A)
Inhibit clocking (do nothing).
Synchronous parallel loading is accomplished by applying the 4 bits of data and taking both mode control inputs,
S0 and S1, high. The data are loaded into the associated flip-flops and appear at the outputs after the positive
transition of the clock input. During loading, serial data flow is inhibited.
Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low.
Serial data for this mode is entered at the shift-right data input. When S0 is low and S1 is high, data shifts left
synchronously and new data is entered at the shift-left serial inputs. Clocking of the flip-flop is inhibited when
both mode control inputs are low.
The 74ACT11194 is characterized for operation from − 40°C to 85°C.
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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Copyright  1993, Texas Instruments Incorporated
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