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SN74FB2040RC Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças SN74FB2040RC
Descrição Electrónicos  8-BIT TTL/BTL TRANSCEIVER
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
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SN74FB2040RC Folha de dados(HTML) 1 Page - Texas Instruments

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SN74FB2040
8-BIT TTL/BTL TRANSCEIVER
SCBS173N – NOVEMBER 1991 – REVISED MARCH 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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
D BIAS VCC Pin 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
RC PACKAGE
(TOP VIEW)
14 15 16 17 18 19 20 21 22 23 24 25 26
52 51 50 49 48 47 46 45 44 43 42 41 40
GND
AI2
AI3
AO3
GND
AO4
GND
AI4
AI5
AO5
GND
AO6
GND
GND
B2
GND
B3
GND
B4
GND
B5
GND
B6
GND
B7
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
39
38
37
36
35
34
33
32
31
30
29
28
27
description
The SN74FB2040 is an 8-bit transceiver designed to translate signals between TTL and backplane transceiver
logic (BTL) environments.
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 A port operates at TTL-signal levels and has separate 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.
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.
Copyright
 2002, Texas Instruments Incorporated
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.
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.


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