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SN74BCT652NTE4 Datasheet(PDF) 1 Page - Texas Instruments

No. de pieza SN74BCT652NTE4
Descripción Electrónicos  OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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SN74BCT652NTE4 Datasheet(HTML) 1 Page - Texas Instruments

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SN54BCT652, SN74BCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS038A – AUGUST 1989 – REVISED NOVEMBER 1993
Copyright
© 1993, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
Independent Registers and Enables for
A and B Buses
Multiplexed Real-Time and Stored Data
Power-Up High-Impedance Mode
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
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.
Select-control (SAB and SBA) inputs are provided
to select whether real-time or stored data is
transferred. The circuitry used for select control
eliminates the typical decoding glitch that occurs
in a multiplexer during the transition between
stored and real-time data. A low input selects
real-time data, and a high input selects stored
data. Figure 1 illustrates the four fundamental
bus-management functions that can be performed
with the
′BCT652.
Data on the A or B data bus, or both, can be stored in the internal D-type 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 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. Therefore,
when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remain at
its last state.
The SN54BCT652 is characterized for operation over the full military temperature range of – 55
°C to 125°C. The
SN74BCT652 is characterized for operation from 0
°C to 70°C.
1
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8
9
10
11
12
24
23
22
21
20
19
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13
CLKAB
SAB
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
CLKBA
SBA
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
SN54BCT652 ...JT OR W PACKAGE
SN74BCT652 ... DW OR NT PACKAGE
(TOP VIEW)
32 1
13 14
5
6
7
8
9
10
11
OEBA
B1
B2
NC
B3
B4
B5
A1
A2
A3
NC
A4
A5
A6
4
15 16 17 18
28 27 26
25
24
23
22
21
20
19
12
SN54BCT652 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
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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