SN74FB2031
9-BIT TTL/BTL ADDRESS/DATA TRANSCEIVER
SCBS176K – NOVEMBER 1991 – REVISED SEPTEMBER 1999
D
D
D
D
D
Compatible With IEEE Std 1194.1-1991
(BTL)
TTL A Port, Backplane Transceiver Logic
(BTL) B Port
Open-Collector B-Port Outputs Sink
100 mA
Isolated Logic-Ground and Bus-Ground
Pins Reduce Noise
High-Impedance State During Power Up
and Power Down
D
D
D
D
BIAS V
CC
Minimizes Signal Distortion
During Live Insertion or Withdrawal
B-Port Biasing Network Preconditions the
Connector and PC Trace to the BTL
High-Level Voltage
TTL-Input Structures Incorporate Active
Clamping to Aid in Line Termination
Packaged in Plastic Quad Flatpack
RC PACKAGE
(TOP VIEW)
A2
GND
A1
V
CC
BIAS V
CC
OEA
OEB
OEB
TCK
V
CC
GND
A3
GND
A4
GND
A5
GND
A6
GND
A7
GND
A8
GND
52 51 50 49 48 47 46 45 44 43 42 41 40
1
39
2
3
4
5
6
7
8
9
10
11
12
13
14 15 16 17 18 19 20 21 22 23 24 25 26
38
37
36
35
34
33
32
31
30
29
28
27
TMS
GND
B1
GND
B2
GND
B3
GND
B4
GND
B5
GND
B6
GND
B7
GND
B9
GND
B8
Copyright
©
1999, Texas Instruments Incorporated
A9
SEL1
LCB
BG V
CC
LCA
description
The SN74FB2031 device is a 9-bit transceiver designed to translate signals between TTL and backplane
transceiver logic (BTL) environments. It is specifically designed 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 V
CC
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 V
CC
is less than 2.1 V, the A outputs are in the
high-impedance state.
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.
BG GND
SEL0
TDO
TDI
V
CC
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
1
TI [ TEXAS INSTRUMENTS ]
