SN54FB1651, SN74FB1651 17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVERS WITH BUFFERED CLOCK LINES

SCBS177I - OCTOBER 1993 - REVISED JUNE 1997

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features

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
Package Options Include High-Power Shrink Quad Flat (PCA) Package With 0.5-mm Pin Pitch and Ceramic Quad Flat (HQA) Package

description

The 'FB1651 contain an 8-bit and a 9-bit transceiver with a buffered clock. The clock and the transceivers are designed to translate signals between TTL and backplane transceiver logic (BTL) environments. They are 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 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.

The SN54FB1651 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74FB1651 is characterized for operation from 0°C to 70°C.

Title: 17-BIT TTL/BTL UNIVERSAL STORAGE TRANSCEIVERS WITH BUFFERED CLOCK LINES
Product Family: BACKPLANE LOGIC (GTL, FB/FBPLUS, BTL, ETL)
Device Functionality: BUS TRANSCEIVER
Orderable Devices: SN74FB1651PCA

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