74ABT16646CSSCX

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ABT16646CSSCX is a 16-bit bus transceiver and register with 3-state outputs, housed in a 56-lead SSOP package. It operates within a supply voltage range of +4.5V to +5.5V. The device features independent registers for A and B buses, allowing multiplexed transmission of data from inputs or internal storage. It supports real-time transparent mode and stored data modes controlled by OE, DIR, and select pins. Output drive capabilities include 64 mA sink and 32 mA source currents. Maximum clock frequency reaches 200 MHz, with propagation delays ranging from 1.5 ns to 5.0 ns depending on the path and load conditions.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Independent registers for A and B buses enable flexible data storage and retrieval.
• Multiplexed real-time and stored data transmission via control pins.
• High output drive capability with 64 mA sink and 32 mA source current.
• Glitch-free high impedance bus loading during power up and down cycles.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory and data acquisition systems
• Clocking and buffering applications requiring high speed
• Control logic circuits with isolated input/output sections

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'X' indicates tape and reel packaging when sourcing this component. Confirm the manufacturer origin, as onsemi acquired Fairchild Semiconductor assets; datasheets may retain legacy branding. Ensure the SSOP package variant matches the required PCB footprint. Check for RoHS compliance status if environmental regulations apply to the end product. Validate that the operating temperature range meets system requirements.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring 16-bit bidirectional data transfer with simultaneous storage capabilities. The ABT technology offers faster switching speeds compared to standard ALS or LVC families. Consider the 56-lead SSOP package for space-constrained boards where surface mount assembly is preferred. Evaluate the 64 mA sink current against load requirements to ensure signal integrity without external drivers. Verify compatibility with 5V logic levels for interfacing with other system components.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74ABT series of advanced BiCMOS logic devices, known for high-speed performance and low power consumption. The 74ABT16646 specifically addresses needs for complex bus architectures where data isolation and storage are critical. It serves as a bridge between microprocessors and peripheral devices, facilitating efficient data management in digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for direct pin-compatible substitutes within the same 74ABT family. Verify equivalent electrical characteristics, particularly propagation delay and output drive strength. Ensure the replacement part supports the same 56-lead SSOP package configuration. Confirm functional equivalence regarding register independence and control logic.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the maximum clock frequency supported by the 74ABT16646?

The maximum clock frequency is 200 MHz under recommended operating conditions.

How does the device handle data during power-up and power-down?

It provides high impedance glitch-free bus loading throughout the entire power-up and power-down cycle.

Can data be transferred directly from one bus to another without being stored?

Yes, the device supports real-time transparent mode where data transfers directly from the A-bus to the B-bus or vice versa based on control signals.