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SN74FB1651 Datasheet(PDF) 2 Page - Texas Instruments

Part No. SN74FB1651
Description  17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER WITH BUFFERED CLOCK LINE
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74FB1651 Datasheet(HTML) 2 Page - Texas Instruments

 
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SN74FB1651
17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER
WITH BUFFERED CLOCK LINE
SCBS177L – OCTOBER 1993 – REVISED SEPTEMBER 1999
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description
The SN74FB1651 device contains an 8-bit and a 9-bit transceiver with a buffered clock. The clock and the
transceivers are designed to translate signals between TTL and backplane transceiver-logic (BTL)
environments. It is designed specifically to be compatible with IEEE Std 1194.1-1991.
The B port operates at BTL-signal levels. The open-collector B ports are specified to sink 100 mA. Two output
enables (OEB and OEB) are provided for the B outputs. When OEB is low, OEB is high, or VCC is less than 2.1 V,
the B port is turned off.
The A port operates at TTL-signal levels. The A outputs reflect the inverse of the data at the B port when the
A-port output enable (OEA) is high. When OEA is low or when VCC is less than 2.1 V, the A outputs are in the
high-impedance state.
BIAS VCC establishes a voltage between 1.62 V and 2.1 V on the BTL outputs when VCC is not connected.
BG VCC and BG GND are the supply inputs for the bias generator.
The SN74FB1651 is characterized for operation from 0
°C to 70°C.
Function Tables
TRANSCEIVER
INPUTS
FUNCTION
OEA
OEA
OEB
OEB
FUNCTION
X
X
H
L
A data to B bus
L
H
X
X
B data to A bus
L
H
H
L
A data to B bus, B data to A bus
X
X
L
X
B bus isolation
X
XX
H
B-bus isolation
H
X
X
X
A bus isolation
X
L
X
X
A-bus isolation
STORAGE MODE
INPUTS
FUNCTION
LE
CLK
FUNCTION
H
X
Transparent
L
Store data
L
L
Storage


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