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SN74BCT2423A Datasheet

16-Bit Latched Multiplexer/Demultiplexer Bus Transceivers

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SN74BCT2423A, SN74BCT2424A
16-BIT LATCHED MULTIPLEXER/DEMULTIPLEXER BUS TRANSCEIVERS
D Multiplexed Real-Time and Latched Data
D Byte Control for Byte-Write Applications
D Useful in NuBust Interface Applications
D Useful in Memory Interleave Applications
SDIS013 – JULY 1989 – REVISED AUGUST 1990
D BiCMOS Design Substantially Reduces
Standby Current
D Dependable Texas Instruments Quality and
Reliability
SN74BCT2423A . . . FN PACKAGE
(TOP VIEW)
AENL
ABLEA
ABENL
GND
AB 7
AB 6
AB 5
AB 4
GND
AB 3
AB 2
AB 1
AB 0
VCC
A / BSEL
BLE
BENL
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
10 60
11 59
12 58
13 57
14 56
15 55
16 54
17 53
18 52
19 51
20 50
21 49
22 48
23 47
24 46
25 45
26 44
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
AENM
ALE
VCC
VCC
AB15
AB14
AB13
AB12
GND
AB11
AB10
AB 9
AB 8
GND
ABENM
ABLEB
BENM
NuBus 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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1990, Texas Instruments Incorporated
1


Texas Instruments (TI) Electronic Components Datasheet

SN74BCT2423A Datasheet

16-Bit Latched Multiplexer/Demultiplexer Bus Transceivers

No Preview Available !

SN74BCT2423A, SN74BCT2424A
16-BIT LATCHED MULTIPLEXER/DEMULTIPLEXER BUS TRANSCEIVERS
SDIS013 – JULY 1989 – REVISED AUGUST 1990
SN74BCT2424A . . . FN PACKAGE
(TOP VIEW)
AENL
ABLEA
ABENL
GND
AB 7
AB 6
AB 5
AB 4
GND
AB 3
AB 2
AB 1
AB 0
VCC
A / BSEL
BLE
BENL
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
10 60
11 59
12 58
13 57
14 56
15 55
16 54
17 53
18 52
19 51
20 50
21 49
22 48
23 47
24 46
25 45
26 44
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
AENM
ALE
VCC
VCC
AB15
AB14
AB13
AB12
GND
AB11
AB10
AB 9
AB 8
GND
ABENM
ABLEB
BENM
description
The ’BCT2423A and ’BCT2424A are general-purpose 16-bit bidirectional transceivers with data storage latches
and byte control circuitry arranged for use in applications where two separate data paths must be multiplexed
onto, or demultiplexed from, a single data path. Typical applications include multiplexing and/or demultiplexing
of address and data information in microprocessor- or bus-interface applications. These devices are also useful
in memory-interleaving applications. The ’BCT2423A and ’BCT2424A offer inverted and noninverted data
paths, respectively.
The ’BCT2423A and ’BCT2424A were designed using Texas Instruments BiCMOS process, which features
bipolar drive characteristics, but also greatly reduces the standby power of the device when disabled. This is
valuable when the device is not performing an address or data transfer.
Three 16-bit I/O ports, A15 –A0, B15 –B0, and AB15 –AB0 are available for address and/or data transfer. The
AENM, AENL, BENM, BENL, ABENM, and ABENL inputs control the bus transceiver functions. These control
signals also allow byte-control of the most significant byte and least significant byte for each bus.
Address and/or data information can be stored using the internal storage latches. The ALE, BLE, ABLEA, and
ABLEB inputs are active low, and are used to control data storage. When the latch enable input is low, the latch
is transparent. When the latch enable input goes high, the data present at the inputs is latched, and remains
latched until the latch enable input is returned low.
Data on the ’A’ bus and ’B’ bus are multiplexed onto the ’AB’ bus via the A /BSEL control line. When A /BSEL
is low, A15 –A0 is mapped to the AB15 –AB0 outputs. When A /BSEL is high, B15 –B0 is mapped to the
AB15–AB0 outputs.
The SN74BCT2423A and SN74BCT2424A are characterized for operation from 0°C to 70°C.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74BCT2423A
Description 16-Bit Latched Multiplexer/Demultiplexer Bus Transceivers
Maker Texas
Total Page 14 Pages
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