74ABT657D,602

Buffers, Drivers, Receivers, Transceivers Overview

The NXP 74ABT657D,602 is an octal bus transceiver featuring non-inverting buffers with 3-state outputs and an integrated 8-bit parity generator/checker. It operates within a supply voltage range of 4.5 V to 5.5 V. The device provides high output drive capability with a guaranteed current sinking of 64 mA and sourcing of -32 mA. Propagation delays are specified at 1.1 ns to 4.1 ns for data paths and up to 12.9 ns for the error output path. It utilizes a 24-lead SO plastic small outline package (SOT137-1) and supports an operating temperature range from -40 °C to +85 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates combinational functions including bidirectional data transfer and parity checking in a single package
• Provides high-speed performance with low static and dynamic power dissipation
• Features robust latch-up protection exceeding JESD78B Class II levels and ESD protection exceeding 2000 V HBM
• Includes power-up 3-state functionality to ensure safe initialization

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented applications requiring data integrity verification
• Systems utilizing multiplexed transmission of registered or real-time data
• High-performance BiCMOS logic circuits needing high output drive capabilities

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix '602' against official documentation to confirm packaging details such as tape and reel specifications. Confirm that the SO24 package variant matches the required board layout constraints. Ensure compatibility with the intended operating temperature range and supply voltage requirements before finalizing procurement decisions.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require both bidirectional data buffering and hardware-based parity error detection. The ABT series offers a balance of speed and drive strength suitable for high-performance digital interfaces. Consider the 24-pin SO package dimensions for PCB footprint planning and verify that the input/output voltage levels align with the system's logic standards.

Buffers, Drivers, Receivers, Transceivers Part Context

The 74ABT657 belongs to the 74ABT logic family, which combines the high speed of the ABT series with the low power characteristics typical of advanced BiCMOS technology. This family is designed for demanding applications where signal integrity and fast switching speeds are critical. The inclusion of parity generation and checking distinguishes it from standard octal transceivers by adding a layer of data validation directly within the logic function.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The datasheet lists the 74ABT657DB (SSOP24) and 74ABT657PW (TSSOP24) as alternative package versions of the same functional device. Verify pinout compatibility and physical dimensions when substituting these variants.