SSTUH32866EC/G,557

Specialty Logic Overview

The SSTUH32866EC/G,557 is a 1.8 V configurable registered buffer designed for DDR2 memory modules requiring parity checking. It operates within a supply voltage range of 1.7 V to 1.9 V and supports clock frequencies up to 450 MHz. The device features a maximum single-bit switching propagation delay of 1.8 ns and a mass-switching delay of 2.0 ns. It provides low-level output current of 12 mA and high-level output current of -12 mA. The component functions in two topologies: 25-bit 1:1 or 14-bit 1:2, utilizing configuration pins C0 and C1. It is housed in a 96-ball LFBGA package with dimensions of 13.5 mm x 5.5 mm.

Specialty Logic Feature Summary

• Configurable register supporting DDR2 Registered DIMM applications
• Higher output drive strength optimized for high-capacitive load nets
• Checks parity on DIMM-independent data inputs
• Supports differential clock inputs

Specialty Logic Applications

• DDR2 registered DIMMs desiring parity checking functionality
• Stacked or planar high-DRAM count registered DIMMs

Specialty Logic Procurement Notes

Verify the specific ordering suffix /G,557 against the manufacturer's datasheet to confirm the Pb-free solder ball compound specification. Ensure the procurement documentation matches the LFBGA96 package version SOT536-1. Confirm that the component meets the required RoHS compliance standards as defined in the official product data sheet before finalizing acquisition.

Specialty Logic Selection Notes

Select this component when designing DDR2 RDIMMs that require integrated parity error detection alongside signal buffering. The device is suitable for applications needing higher-drive outputs to manage heavy capacitive loads while maintaining signal integrity. Consider the 1.8 V operating voltage and SSTL_18 input compatibility requirements during system architecture planning.

Specialty Logic Part Context

The SSTUH32866EC/G,557 belongs to the NXP SSTU logic series. It is functionally identical to the SSTU32866 but includes higher-drive outputs optimized for driving heavy load nets such as stacked DRAMs. The device adheres to JEDEC JESD82-7 standards for registered buffers, adding parity checking capabilities within a compatible pinout structure.

Specialty Logic Replacement Considerations

SSTUH32866EC

Specialty Logic FAQ

How is the parity error indicated?

The device indicates a parity error via its open-drain QERR pin, which drives active LOW when an error is detected based on even parity conventions.

What are the available configuration modes?

Using configuration pins C0 and C1, the register can be configured into a 25-bit 1:1 topology or a 14-bit 1:2 topology designated as Register A or Register B.