SN74FB2040 - 8 位、TTL/BTL 收发器

SN74FB2040是TI德州仪器公司的一款无产品，SN74FB2040是8 位、TTL/BTL 收发器，本站介绍了SN74FB2040的封装应用图解、特点和优点、功能等，并给出了与SN74FB2040相关的TI元器件型号供参考。

SN74FB2040 - 8 位、TTL/BTL 收发器 - 无 - 背板逻辑器件（GTL/TTL/BTL/ECL收发器/转换器） - 德州仪器

产品描述

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.

产品特性

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
High-Impedance State During Power Up and Power Down
BIAS VCC Pin Minimizes Signal Distortion During Live Insertion or Withdrawal
B\-Port Biasing Network Preconditions the Connector and PC Trace to the BTL High-Level Voltage

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