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SN74FB1653 Scheda tecnica(PDF) 2 Page - Texas Instruments

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Il numero della parte SN74FB1653
Spiegazioni elettronici  17-BIT LVTTL/BTL UNIVERSAL STORAGE TRANSCEIVER WITH BUFFERED CLOCK LINE
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

SN74FB1653 Scheda tecnica(HTML) 2 Page - Texas Instruments

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SN74FB1653
17BIT LVTTL/BTL UNIVERSAL STORAGE TRANSCEIVER
WITH BUFFERED CLOCK LINE
SCBS702H − AUGUST 1997 − REVISED MARCH 2004
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information
The SN74FB1653 contains an 8-bit and a 9-bit transceiver with a buffered clock. The clock and transceivers
are designed to translate signals between LVTTL and BTL environments. The device is designed specifically
to be compatible with IEEE Std 1194.1-1991 (BTL).
The A port operates at LVTTL 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(5 V) typically is less than 2.5 V, the A outputs
are in the high-impedance state.
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(5 V) typically
is less than 2.5 V, the B port is turned off.
The clock-select (2SEL1 and 2SEL2) inputs are used to configure the TTL-to-BTL clock paths and delays (refer
to the MUX-MODE DELAY table).
BIAS VCC establishes a voltage between 1.62 V and 2.1 V on the BTL outputs when VCC(5 V) is not connected.
BG VCC and BG GND are the supply inputs for the bias generator.
VREF is an internally generated voltage source. It is recommended that VREF be decoupled with an external
0.1-
µF capacitor.
Enhanced heat-dissipation techniques should be used when operating this device from AI to A0 at frequencies
greater than 50 MHz, or from AI to B or B to A0 at frequencies greater than 100 MHz.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
0
°C to 70°C
TQFP − PCA
Tube
SN74FB1653PCA
FB1653
† Package drawings, standard packing quantities, thermal data, symbolization, and
PCB design guidelines are available at www.ti.com/sc/package.
Function Tables
TRANSCEIVER
INPUTS
FUNCTION
OEA
OEA
OEB
OEB
FUNCTION
X
X
H
L
A data to B bus
L
HX
X
B data to A bus
L
HH
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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