74SSTUB32865ZJBR

Specialty Logic Overview

The Texas Instruments 74SSTUB32865ZJBR is a 28-bit to 56-bit registered buffer designed for 1.7-V to 1.9-V VCC operation. It supports SSTL_18 data inputs and LVCMOS switching levels on control pins. The device features differential clock inputs (CK and CK) and registers data at the crossing of CK going high and CK going low. It includes address-parity test functionality with an open-drain PTYERR output. The component operates within an industrial temperature range of -40°C to 85°C.

Specialty Logic Feature Summary

• Supports SSTL_18 data inputs and LVCMOS switching levels on chip-select, gate-enable, and reset inputs
• Registers data using differential clock inputs optimized for DDR2 RDIMM PCB layout
• Checks parity on DIMM-independent data inputs and indicates errors via an active-low open-drain output
• Minimizes system power consumption by gating data outputs from changing state based on chip-select inputs

Specialty Logic Applications

• DDR2 Registered Dual In-line Memory Modules (RDIMMs)
• Stacked DDR2 RDIMMs requiring one-to-two output support
• Systems requiring address-parity testing for memory integrity

Specialty Logic Procurement Notes

Verify the specific ordering suffix ZJBR corresponds to the tape and reel packaging configuration as documented in the manufacturer's ordering information. Confirm that the industrial temperature range specification aligns with the operational requirements of the target application environment. Ensure that the supply voltage constraints are strictly maintained within the recommended operating conditions to guarantee proper device functionality.

Specialty Logic Selection Notes

Select this component when designing systems that require a 28-bit to 56-bit registered buffer with integrated parity checking capabilities. It is suitable for applications utilizing SSTL_18 signaling standards and differential clocking schemes. Consider its low-power standby operation and chip-select gating features if minimizing system power consumption during inactive states is a design priority.

Specialty Logic Part Context

This device belongs to the Texas Instruments Widebus+ family of logic components. It is specifically engineered to optimize PCB layout for DDR2 Registered DIMMs. The part number 74SSTUB32865ZJBR identifies the specific package type and packing method within the broader product line of configurable registered buffers.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers: 74SSTUB32868ZRHR.