SN74FB2031_14 Datasheet, PDF (1/13 Pages) Texas Instruments – 9-BIT TTL/BTL ADDRESS/DATA TRANSCEIVER

SN74FB2031
9-BIT TTL/BTL ADDRESS/DATA TRANSCEIVER
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 High-Impedance State During Power Up
and Power Down
SCBS176N – NOVEMBER 1991 – REVISED JUNE 2001
D BIAS V_CC Minimizes Signal Distortion
During Live Insertion or Withdrawal
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
RC PACKAGE
(TOP VIEW)
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
38
3
37
4
36
5
35
6
34
7
33
8
32
9
31
10
30
11
29
12
28
13
27
14 15 16 17 18 19 20 21 22 23 24 25 26
GND
B2
GND
B3
GND
B4
GND
B5
GND
B6
GND
B7
GND
description
The SN74FB2031 is a 9-bit transceiver 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 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.
Pins are allocated for the four-wire IEEE Std 1149.1 (JTAG) test bus, although currently there are no plans to
release a JTAG-featured version. TMS and TCK are not connected and TDI is shorted to TDO.
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.
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Copyright  2001, Texas Instruments Incorporated
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