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SN54LVC652A Datasheet(HTML) 2 Page - Texas Instruments

Part No. SN54LVC652A
Description  OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54LVC652A Datasheet(HTML) 2 Page - Texas Instruments

 
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SN54LVC652A, SN74LVC652A
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCAS303H – JANUARY 1993 – REVISED AUGUST 1998
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
To ensure the high-impedance state during power up or power down, OEBA should be tied to VCC through a
pullup resistor and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor
is determined by the current-sinking/current-sourcing capability of the driver.
The SN54LVC652A is characterized for operation over the full military temperature range of –55
°C to 125°C.
The SN74LVC652A is characterized for operation from –40
°C to 85°C.
FUNCTION TABLE
INPUTS
DATA I/O†
OPERATION OR FUNCTION
OEAB
OEBA
CLKAB
CLKBA
SAB
SBA
A1–A8
B1–B8
OPERATION OR FUNCTION
L
H
H or L
H or L
X
X
Input
Input
Isolation
L
H
↑↑
X
X
Input
Input
Store A and B data
X
H
H or L
X
X
Input
Unspecified‡
Store A, hold B
H
H
↑↑
X‡
X
Input
Output
Store A in both registers
L
X
H or L
X
X
Unspecified‡
Input
Hold A, store B
L
L
↑↑
XX‡
Output
Input
Store B in both registers
L
L
X
X
X
L
Output
Input
Real-time B data to A bus
L
L
X
H or L
X
H
Output
Input
Stored B data to A bus
H
H
X
X
L
X
Input
Output
Real-time A data to B bus
H
H
H or L
X
H
X
Input
Output
Stored A data to B bus
H
L
H or L
H or L
H
H
Output
Output
Stored A data to B bus and
stored B data to A bus
† The data-output functions can be enabled or disabled by a variety of level combinations at OEAB or OEBA. Data-input functions always are
enabled; i.e., data at the bus terminals is stored on every low-to-high transition of the clock inputs.
‡ Select control = L; clocks can occur simultaneously.
Select control = H; clocks must be staggered to load both registers.


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