SN74BCT29854DWR

Specialty Logic Overview

The SN74BCT29854DWR is an 8-bit to 9-bit parity transceiver utilizing a BiCMOS process with TTL-compatible inputs and outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to 70°C. The device features flow-through pinout architecture, providing independent output-enable controls (OEA, OEB) for bidirectional data transfer between A and B buses. It includes a parity generator/checker that produces an odd parity output and utilizes an open-collector error flag (ERR) for asynchronous communication diagnostics.

Specialty Logic Feature Summary

• Generates odd parity during transmission from the A bus to the B bus
• Checks incoming parity on the B bus and flags errors via an open-collector ERR output
• Includes a latchable error-flag register controllable by LE and CLR inputs
• Supports isolation of buses through independent high/low output-enable signals

Specialty Logic Applications

• Asynchronous communication interfaces requiring parity verification
• High-speed bus transceivers with integrated error detection
• System diagnostic circuits monitoring data integrity across parallel buses

Specialty Logic Procurement Notes

Verify the specific ordering suffix against the Package Option Addendum to confirm tube packaging and lead finish specifications. Ensure the design accommodates the open-collector nature of the ERR output, which requires an external pull-up resistor for proper logic level definition. Confirm thermal management aligns with the specified 0°C to 70°C operating range and power dissipation limits under maximum load conditions.

Specialty Logic Selection Notes

Select this component when designing systems requiring both data buffering and real-time parity checking in a single package. The flow-through pinout simplifies PCB layout for bidirectional data paths. Consider the BiCMOS technology for reduced standby current compared to standard bipolar implementations. Verify compatibility with system voltage levels, as the device requires a dedicated 5 V supply rail distinct from potential lower-voltage logic domains.

Specialty Logic Part Context

This device belongs to the SN74BCT family, characterized by BiCMOS technology that combines the speed of bipolar transistors with the low power consumption of CMOS. It is functionally equivalent to the AMD Am29854. The DW package variant denotes a plastic small-outline configuration, suitable for surface-mount assembly processes common in modern electronic manufacturing.

Specialty Logic Replacement Considerations

The datasheet explicitly states functional equivalence to the AMD Am29854. No other substitute part numbers are documented in the provided source material.