SN74SSTU32864CZKER

Specialty Logic Overview

The SN74SSTU32864CZKER is a 25-bit configurable registered buffer with SSTL_18 inputs and outputs, designed for 1.7-V to 1.9-V VCC operation. It supports differential clock (CLK and CLK) inputs and LVCMOS switching levels on family control and RESET inputs. The device can be configured as a 25-bit 1:1 or 14-bit 1:2 registered buffer. It features chip-select inputs to minimize system power consumption and output edge-control circuitry to minimize switching noise in unterminated lines. The package is LFBGA-ZKE with 96 pins.

Specialty Logic Feature Summary

• Configurable as a 25-bit 1:1 or 14-bit 1:2 registered buffer
• Supports SSTL_18 data inputs and outputs optimized for DDR2 DIMM PCB layout
• Features chip-select inputs to disable register clocking and minimize system power consumption
• Includes output edge-control circuitry to minimize switching noise in unterminated lines

Specialty Logic Applications

• DDR2 Registered DIMM (RDIMM) applications
• System memory buffering
• High-speed digital signal routing

Specialty Logic Procurement Notes

Verify the specific ordering suffix ZKER corresponds to the LFBGA-ZKE package and tape-and-reel packing configuration. Confirm the device status is PREVIEW or ACTIVE as per the latest Texas Instruments documentation before finalizing procurement plans. Ensure compatibility with SSTL_18 voltage levels and differential clock requirements for the target application design.

Specialty Logic Selection Notes

Select this component when designing systems requiring a configurable registered buffer for DDR2 memory interfaces. Consider the 1:1 versus 1:2 pinout configurations based on the number of SDRAM loads required per DIMM. Evaluate the low-power standby and active modes if power efficiency is a critical design constraint. Ensure the design accommodates the differential clock inputs and LVCMOS control signals.

Specialty Logic Part Context

This part belongs to the Texas Instruments Widebus+ series of logic ICs. It is specifically engineered for high-density memory applications, providing flexibility in buffer configuration to optimize PCB layout for DDR2 DIMMs. The device integrates advanced features like edge-controlled outputs and chip-select functionality to enhance signal integrity and power management in complex digital systems.

Specialty Logic Replacement Considerations

Check for SN74SSTU32864CGKER as an alternative package option within the same functional family. Verify pinout compatibility and electrical specifications before substituting. Consult Texas Instruments for any newer generations or direct replacements that may offer improved performance or availability.

Specialty Logic FAQ

How does the SN74SSTU32864C handle reset conditions?

When the RESET input is low, the differential input receivers are disabled, all registers are reset, and all outputs are forced low. This ensures defined outputs from the register before a stable clock has been supplied.

What is the function of the C0 and C1 inputs?

The C0 and C1 inputs control the pinout configuration. C0 selects between Register A and Register B configurations in the 1:2 mode, while C1 selects between the 25-bit 1:1 and 14-bit 1:2 configurations. These inputs should be hard-wired and not switched during normal operation.

Can the device operate in low-power modes?

Yes, the device supports low-power standby operation when RESET is low, disabling differential input receivers. It also supports low-power active operation by monitoring DCS and CSR inputs, which can gate Qn outputs from changing states to minimize power consumption.