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74AC11646DW Datasheet

  • 74AC11646DW

  • Octal Bus Transceivers And Registers 28-SOIC -40 to 85

  • 124.04KB

  • 9頁

  • TI

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74AC11646
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCAS079A 鈥?JULY 1987 鈥?REVISED APRIL 1993
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Independent Registers for A and B Buses
Multiplexed Real-Time and Stored Data
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
EPIC
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(Enhanced-Performance Implanted
CMOS) 1-碌m Process
500-mA Typical Latch-Up Immunity
at 125擄C
DW PACKAGE
(TOP VIEW)
description
The 74AC11646 consists of bus transceiver
circuits, D-type flip-flops, and control circuitry
arranged for multiplexed transmission of data
directly from the input bus or from the internal
registers. Data on the A or B bus is clocked
into the registers on the low-to-high transition of
the appropriate clock (CLKAB or CLKBA) input.
Figure 1 illustrates the four fundamental bus-
management functions that can be performed with
the 74AC11646.
OE
A1
A2
A3
A4
GND
GND
GND
GND
A5
A6
A7
A8
DIR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CLKAB
SAB
B1
B2
B3
B4
V
CC
V
CC
B5
B6
B7
B8
CLKBA
SBA
Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions. In the
transceiver mode, data present at the high-impedance port may be stored in either register or in both.
The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. The
direction control (DIR) determines which bus will receive data when OE is low. In the isolation mode (OE high),
A data may be stored in one register and/or B data may be stored in the other register.
When an output function is disabled, the input function is still enabled and may be used to store and transmit
data. Only one of the two buses, A or B, may be driven at a time.
The 74AC11646 is characterized for operation from 鈥?40擄C to 85擄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.
Copyright
漏
1993, Texas Instruments Incorporated
POST OFFICE BOX 655303
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DALLAS, TEXAS 75265
2鈥?

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