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74AC11651 Datasheet(PDF) 1 Page - Texas Instruments

Part No. 74AC11651
Description  OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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74AC11651 Datasheet(HTML) 1 Page - Texas Instruments

   
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74AC11651
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCAS135 – MARCH 1990 – REVISED APRIL 1993
Copyright
© 1993, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Independent Registers and Enables for A
and B Buses
Multiplexed Real-Time and Stored Data
Inverting Data Paths
Flow-Through Architecture Optimizes PCB
Layout
Center-Pin V
CC and GND 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
description
These devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed
transmission of data directly from the data bus or from the internal storage registers. Output-enable (OEAB and
OEBA) inputs are provided to control the transceiver functions. The select-control (SAB and SBA) inputs are
provided to select whether real-time or stored data is transferred. A low input level selects real-time data, and
a high input level selects stored data. Figure 1 illustrates the four fundamental bus-management functions that
can be performed with the 74AC11651.
Data on the A or B bus, or both, can be stored in the internal D flip-flops by low-to-high transitions at the
appropriate clock (CLKAB or CLKBA) inputs regardless of the select- or enable-control pins. When SAB and
SBA are in the real-time transfer mode, it is also possible to store data without using the internal D-type flip-flops
by simultaneously enabling OEAB and OEBA. In this configuration, each output reinforces its input. Thus, when
all the other data sources to the two sets of bus lines are at high impedance, each set will remain at its last state.
The 74AC11651 is characterized for operation from – 40
°C to 85°C.
DW OR NT PACKAGE
(TOP VIEW)
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OEAB
A1
A2
A3
A4
GND
GND
GND
GND
A5
A6
A7
A8
OEBA
CLKAB
SAB
B1
B2
B3
B4
VCC
VCC
B5
B6
B7
B8
CLKBA
SBA
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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