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SN74FB1651 Datasheet

17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

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SN74FB1651
17ĆBIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER
WITH BUFFERED CLOCK LINE
SCBS177O − OCTOBER 1993 − REVISED MARCH 2004
D Compatible With IEEE Std 1194.1-1991
(BTL)
D TTL A Port, Backplane Transceiver Logic
(BTL) B Port
D Open-Collector B-Port Outputs Sink
100 mA
D BIAS VCC Minimizes Signal Distortion
During Live Insertion or Withdrawal
D High-Impedance State During Power Up
and Power Down
D B-Port Biasing Network Preconditions the
Connector and PC Trace to the BTL
High-Level Voltage
D TTL-Input Structures Incorporate Active
Clamping to Aid in Line Termination
PCA PACKAGE
(TOP VIEW)
NC
VCC
GND
1AO6
1AI6
1AO7
1AI7
GND
1AO8
1AI8
1AO9
1AI9
GND
2CLK
NC
2AO2
2AI2
GND
2AO3
2AI3
2AO4
2AI4
GND
VCC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
75 1B2
74 GND
73 1B3
72 1B4
71 GND
70 1B5
69 1B6
68 GND
67 1B7
66 1B8
65 GND
64 1B9
63 NC
62 2CLKAB
61 GND
60 2B2
59 2B3
58 GND
57 2B4
56 2B5
55 GND
54 2B6
53 2B7
52 GND
51 2B8
NC − No internal connection
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 2004, Texas Instruments Incorporated
1


Texas Instruments (TI) Electronic Components Datasheet

SN74FB1651 Datasheet

17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER

No Preview Available !

SN74FB1651
17ĆBIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER
WITH BUFFERED CLOCK LINE
SCBS177O − OCTOBER 1993 − REVISED MARCH 2004
description/ordering information
The SN74FB1651 contains an 8-bit and 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. The
device 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.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
0°C to 70°C TQFP − PCA Tube
SN74FB1651PCA FB1651
Package drawings, standard packing quantities, thermal data, symbolization, and
PCB design guidelines are available at www.ti.com/sc/package.
OEA
X
L
L
X
X
H
X
Function Tables
INPUTS
OEA OEB
XH
HX
HH
XL
XX
XX
LX
TRANSCEIVER
OEB
L
X
L
X
H
X
X
FUNCTION
A data to B bus
B data to A bus
A data to B bus, B data to A bus
B-bus isolation
A-bus isolation
STORAGE MODE
INPUTS
LE CLK
FUNCTION
H X Transparent
L Store data
LL
Storage
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74FB1651
Description 17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVER
Maker Texas
Total Page 12 Pages
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