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Texas Instruments (TI) Electronic Components Datasheet

SN74FB2041A Datasheet

7-Bit TTL/BTL Transceiver

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SN74FB2041A
7-BIT TTL/BTL 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 BIAS VCC Pin Minimizes Signal Distortion
During Live Insertion or Withdrawal
SCBS172M – NOVEMBER 1991 – REVISED MARCH 2002
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
RC PACKAGE
(TOP VIEW)
GND
2AI1
2AI2
2AO2
GND
2AO3
GND
2AI3
3AI1
3AO1
GND
3AO2
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
2B1
GND
2B2
GND
2B3
GND
3B1
GND
3B2
GND
3B3
GND
description
The SN74FB2041A is a 7-bit transceiver designed to translate signals between TTL and backplane transceiver
logic (BTL) environments. The device 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 high and OEB is low, the B port is active
and reflects the inverse of the data present at the A-input pins. When OEB is low, OEB is high, or VCC is less
than 2.1 V, the B port is turned off. The enable/disable logic partitions the device as two 3-bit sections and one
1-bit section.
The A port operates at TTL signal levels and has split input and output pins. 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.
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 2002, Texas Instruments Incorporated
1


Texas Instruments (TI) Electronic Components Datasheet

SN74FB2041A Datasheet

7-Bit TTL/BTL Transceiver

No Preview Available !

SN74FB2041A
7-BIT TTL/BTL TRANSCEIVER
SCBS172M NOVEMBER 1991 REVISED MARCH 2002
description (continued)
The pins TMS, TCK, TDI, and TDO are nonfunctional, i.e., not intended for use with the IEEE Std 1149.1 (JTAG)
test bus. TMS and TCK are not connected and TDI is shorted to TDO.
BIAS VCC establishes a voltage between 1.62 V and 2.1 V on the BTL outputs when VCC is not connected.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE TOP-SIDE
PART NUMBER MARKING
0°C to 70°C QFP RC Tube
SN74FB2041ARC FB2041A
Package drawings, standard packing quantities, thermal data,
symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OEB OEB OEA
FUNCTION
LXL
XH L
Isolation
LXH
XHH
B data to AO bus
HL L
AI data to B bus
H L H AI data to B bus, B data to AO bus
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74FB2041A
Description 7-Bit TTL/BTL Transceiver
Maker Texas
Total Page 10 Pages
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