SN74FB1650 - 18-Bit TTL/BTL Universal Storage Transceiver

The SN74FB1650 contains two 9-bit transceivers 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 when V_CC is less than 2.1 V, the A outputs are in the high-impedance state.

BIAS V_CC establishes a voltage between 1.62 V and 2.1 V on the BTL outputs when V_CC is not connected.

BG V_CC and BG GND are the supply inputs for the bias generator.

Products containing the "SN74FB1650" keyword are: SN74FB1650PCA , SN74FB1650PCA , SN74FB1650PCAG4

• 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
• BIAS V_CC Minimizes Signal Distortion During Live Insertion or Withdrawal
• High-Impedance State During Power Up and Power Down
• 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