SN74GTLP21395PW

Translators, Level Shifters Overview

The SN74GTLP21395PW is a dual 1-bit LVTTL-to-GTLP bus transceiver in a 20-pin TSSOP package. It operates at VCC of 3.15V to 3.45V with an operating temperature range of -40°C to +85°C. The device provides bidirectional translation between LVTTL logic levels and GTLP signal levels, featuring adjustable edge-rate control (ERC) for optimized data transfer. It includes split LVTTL ports for feedback paths and selectable polarity controls.

Translators, Level Shifters Feature Summary

• Provides bidirectional interface between GTLP backplane signals and LVTTL logic levels
• Features adjustable edge-rate control (ERC) to optimize rise and fall times for signal integrity
• Includes TI-OPC circuitry to limit ringing on unevenly loaded backplanes
• Supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry

Translators, Level Shifters Applications

• Primary and secondary clock distribution in parallel backplanes
• High-speed interface between cards operating at LVTTL and backplanes at GTLP
• Integration with Texas Instruments 3.3-V 1394 backplane physical-layer controllers
• ATM read and write clock transmission in multislot parallel backplane applications

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix 'PW' corresponds to the TSSOP-20 package configuration. Confirm that the required operating voltage range of 3.15V to 3.45V matches the system design specifications. Ensure compatibility with GTLP termination voltages (VTT = 1.5V) and reference voltages (VREF = 1V) as defined in the datasheet electrical characteristics.

Translators, Level Shifters Selection Notes

Select this component when designing systems requiring transparent or inverted transparent data transfer modes with separate input and output pins for diagnostics. The device is suitable for applications needing individual output-enable controls and true/complement data path selection. Consider the ERC pin functionality if variable edge rates are necessary to manage signal integrity in distributed load environments.

Translators, Level Shifters Part Context

This device belongs to the SN74GTLP series of high-drive bus transceivers designed for Gunning Transceiver Logic (GTL) derivatives. It is specifically engineered to handle the reduced output swing and improved differential input requirements of GTLP standards. The part supports both GTL and GTLP signal levels, offering flexibility in noise margin optimization for various backplane architectures.

Translators, Level Shifters Replacement Considerations

SN74GTLP21395DW: Same functional device in SOIC-20 package.

Translators, Level Shifters FAQ

How does the ERC input affect performance?

The ERC input allows the designer to select between slow and fast edge rates for the B-port outputs. This adjustment optimizes the data-transfer rate and signal integrity based on the specific load conditions of the backplane.

What is the purpose of the split LVTTL port?

The split LVTTL port provides separate A input and Y output pins, creating a feedback path. This feature enables control and diagnostics monitoring by allowing the system to verify data transmission status.