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74AC11652DW Datasheet

  • 74AC11652DW

  • OCTAL BUS TRANSCEIVER AND REGISTERS WITH 3-STATE OUTPUTS

  • 9頁(yè)

  • TI

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74AC11652
OCTAL BUS TRANSCEIVER AND REGISTERS
WITH 3-STATE OUTPUTS
SCAS088A - DECEMBER 1989 - REVISED APRIL 1996
D
D
D
D
D
D
D
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
鈩?/div>
(Enhanced-Performance Implanted
CMOS) 1-碌m Process
500-mA Typical Latch-Up Immunity at
125擄C
DW PACKAGE
(TOP VIEW)
description
The 74AC11652 consists of bus transceiver
14
15
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 74AC11652.
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 other data sources to the two sets of bus lines are at high impedance, each set remains at its last state.
The 74AC11652 is characterized for operation from 鈥?40擄C to 85擄C.
OEAB
A1
A2
A3
A4
GND
GND
GND
GND
A5
A6
A7
A8
OEBA
1
2
3
4
5
6
7
8
9
10
11
12
13
28
27
26
25
24
23
22
21
20
19
18
17
16
CLKAB
SAB
B1
B2
B3
B4
V
CC
V
CC
B5
B6
B7
B8
CLKBA
SBA
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
Copyright
漏
1996, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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