SN74ALVCHG162280GR

Overview

The SN74ALVCHG162280GR is a 16-bit to 32-bit registered bus exchanger with byte masks and 3-state outputs. It operates at a supply voltage of 3 V to 3.6 V, with an operating temperature range of 0 °C to 70 °C. The device features a maximum clock frequency of 160 MHz. Propagation delays (t_pd) from CLK to B or D ports range from 1.5 ns to 7.4 ns. Output enable times (t_en) range from 1.5 ns to 9.5 ns, while disable times (t_dis) range from 1.5 ns to 7.6 ns. High-level output current is 8 mA for A-to-B direction and 6 mA for B-to-A direction.

Feature Summary

• Synchronous data exchange between two ports using internal registers triggered by the low-to-high clock transition.
• Integrated byte mask bits allow selective data transfer control for both data bytes.
• Direction changes are synchronized with the clock via a registered DIR input.
• Active bus-hold circuitry maintains valid logic levels on unused or floating data inputs.

Applications

• Transferring data from narrow high-speed buses to wide lower-frequency buses
• Low-voltage 3.3-V system bus architecture implementations
• Synchronous data routing in multi-port communication interfaces

Procurement Notes

Verify that the component matches the specific Texas Instruments part number SN74ALVCHG162280GR. Confirm the package type corresponds to the DBB (abbreviated as G/GR for tape and reel) configuration. Ensure the operating environment stays within the specified 0 °C to 70 °C temperature range. Check datasheet specifications for absolute maximum ratings to prevent damage during handling or operation.

Selection Notes

Select this component when designing systems requiring synchronous data movement between different bus widths. The device supports a 16-bit to 32-bit conversion path. Consider the integrated series resistors which eliminate the need for external components. Evaluate the 160 MHz maximum clock frequency against system timing requirements. Verify that the 3.3-V supply voltage aligns with the target platform's power rails.

Part Context

This device belongs to the Texas Instruments Widebus family, utilizing EPIC sub-micron CMOS technology. It is designed specifically for low-voltage operations, primarily targeting 3.3-V applications. The registered bus exchanger architecture allows for precise timing control and data synchronization across different bus segments in complex digital circuits.

Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.

FAQ

How does the device handle data transfer direction?

Data flow is controlled by active-low output-enable (OE) and direction-control (DIR) inputs. The DIR input is registered to synchronize bus direction changes with the clock signal.

What is the purpose of the SEL input?

For data transfer in the B-to-A direction, the select (SEL) input chooses between 1B or 2B data sources for the A outputs.

Are external resistors required for the outputs?

No external resistors are required because the A-port outputs have equivalent 50-Ω series resistors and the B-port outputs have equivalent 20-Ω series resistors built-in.