SSTU32866EC/G,557

Specialty Logic Overview

The SSTU32866EC/G,557 is a 1.8 V configurable registered buffer designed for DDR2 Registered DIMMs with parity checking. It supports 25-bit 1:1 or 14-bit 1:2 topologies via C0/C1 pins. Operating at up to 450 MHz, it features a max propagation delay of 1.8 ns (single-bit) and 2.0 ns (mass-switching). Supply voltage ranges from 1.7 V to 1.9 V. The device uses an LFBGA96 package (SOT536-1) and operates between 0 °C and +70 °C.

Specialty Logic Feature Summary

• Configurable register supporting DDR2 RDIMM applications in 1:1 or 1:2 modes
• Integrated parity checking function with open-drain error output
• Controlled output impedance drivers for optimal signal integrity
• Low-power standby operation with asynchronous reset capability

Specialty Logic Applications

• DDR2 registered DIMMs requiring parity checking functionality

Specialty Logic Procurement Notes

Verify the specific ordering suffix matches the required solder ball compound. The EC/G designation indicates Pb-free SnAgCu solder balls, whereas EC denotes SnPb compounds. Confirm package version SOT536-1 aligns with board design requirements. Ensure compatibility with JEDEC JESD82-7 standards for registered buffers.

Specialty Logic Selection Notes

Select this component when designing DDR2 memory modules that require integrated parity error detection. The configuration pins allow flexibility between single-register 1:1 setups and cascaded 1:2 Register A/B arrangements. Verify that the system operates within the 1.7 V to 1.9 V supply range and supports differential clock inputs.

Specialty Logic Part Context

This part belongs to the NXP SSTU series of high-speed logic ICs. It is specifically engineered for memory subsystems, providing buffering and data integrity checks. The device integrates parity logic directly into the registered buffer architecture, simplifying DIMM designs by eliminating external parity checkers.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.