74AC11643 Datasheet, PDF (1/5 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

• Bidirectional Bus Transceivers in
High-Density 24-Pin Packages
• 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
74AC11643
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCAS057A − JULY 1987 − REVISED APRIL 1993
DW OR NT PACKAGE
(TOP VIEW)
A1 1
A2 2
A3 3
A4 4
GND 5
GND 6
GND 7
GND 8
A5 9
A6 10
A7 11
A8 12
24 DIR
23 B1
22 B2
21 B3
20 B4
19 V_CC
18 V_CC
17 B5
16 B6
15 B7
14 B8
13 OE
These octal bus transceivers are designed for asynchronous communication between data buses. These
devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at
the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the
buses are effectively isolated.
The 74AC11643 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
INPUTS
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic symbol^†
13
OE
24
DIR
1
A1
2
A2
3
A3
4
A4
9
A5
10
A6
11
A7
12
A8
G3
3 EN1 [BA]
3 EN2 [AB]
11
12
23
B1
22
B2
21
B3
20
B4
17
B5
16
B6
15
B7
14
B8
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984 and}
IEC Publication 617-12.
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.
logic diagram (positive logic)
13
OE
DIR ²⁴
A1 ¹
23 _B1
To 7 Other Channels
Copyright  1993, Texas Instruments Incorporated
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