SN74SSTVF16857GR

Specialty Logic Overview

The SN74SSTVF16857GR is a 14-bit registered buffer designed for 2.3-V to 2.7-V VCC operation, belonging to the Widebus family. It features SSTL_2 data inputs and outputs meeting SSTL_2 Class I specifications. The device operates from differential clock inputs (CLK and CLK), registering data at the crossing of CLK going high and CLK going low. It supports LVCMOS switching levels on the RESET input, which disables differential receivers and forces all outputs low when active. The flow-through architecture optimizes PCB layout.

Specialty Logic Feature Summary

• Outputs meet SSTL_2 Class I specifications with edge-controlled circuitry optimized for unterminated DIMM loads.
• Supports low-power standby operation where undriven inputs are allowed when RESET is low.
• Provides ESD protection exceeding JESD 22 standards for human-body, machine model, and charged-device models.
• Features latch-up performance exceeding 100 mA per JESD 78, Class II.

Specialty Logic Applications

• PC1600, PC2100, and PC2700 memory applications
• PC3200 memory applications
• Registered DIMMs

Specialty Logic Procurement Notes

Verify the specific ordering suffix 'GR' corresponds to the TSSOP-48 package in tape and reel format with 2000 units per reel. Confirm that the component status is listed as Active Production. Ensure the operating temperature range matches the required application environment of 0°C to 70°C. Check for RoHS compliance and lead finish details such as NIPDAU.

Specialty Logic Selection Notes

Select this component for designs requiring 14-bit registered buffering with SSTL_2 compatibility. It is suitable for systems operating between 2.3 V and 2.7 V. Consider its flow-through architecture for simplified PCB layout. Verify that the differential clock requirements align with the system's timing constraints. Ensure the RESET input logic levels match the LVCMOS standard used in the design.

Specialty Logic Part Context

This part is part of Texas Instruments' Widebus family, specifically the SN74SSTVF16857 series. It is pinout and functionality compatible with the JEDEC standard SSTV16857. The device is manufactured by Texas Instruments and falls under the category of buffers and line drivers within their logic IC portfolio.

Specialty Logic Replacement Considerations

The SN74SSTVF16857GR is functionally compatible with the JEDEC standard SSTV16857. Designers should verify pinout compatibility before substitution. No other specific replacement part numbers are documented in the provided source material.

Specialty Logic FAQ

How does the RESET input affect the differential input receivers?

When the RESET input is low, it disables the differential input receivers, resets all registers, and forces all outputs low. Undriven (floating) data, clock, and reference voltage inputs are allowed during this state.

What are the recommended supply voltage ranges for different memory speeds?

For PC1600, PC2100, and PC2700 applications, the VDDQ range is 2.3 V to 2.7 V. For PC3200 applications, the VDDQ range is 2.5 V to 2.7 V.

Does the device support simultaneous switching noise reduction?

Yes, the output edge-control circuitry minimizes switching noise in unterminated DIMM loads. It operates up to 600 ps faster than the JEDEC standard SSTV16857 in PC2700 DIMM applications regarding simultaneous switching.