GS81284Z36GB-250I

Memory IC Overview

The GS81284Z36GB-250I is a 144 Mbit Synchronous Static RAM with a 4 M x 36 organization. It supports 250 MHz operation in Pipeline mode and Flow Through mode. The device operates on a 2.5 V or 3.3 V core supply and I/O supply. Access times are 2.5 ns for Pipeline and 6.5 ns for Flow Through modes. It utilizes a 119-bump BGA package.

Memory IC Feature Summary

• NBT functionality enables zero wait Read-Write-Read bus utilization without deselect cycles.
• User-configurable Pipeline and Flow Through operational modes via the FT pin.
• Supports Byte Write operations for 9-bit Bytes using dedicated Byte Write Enable signals.
• Includes IEEE 1149.1 JTAG-compatible Boundary Scan for test access.

Memory IC Applications

• High-speed data buffering in network infrastructure equipment
• Cache memory implementation in telecommunications systems
• FIFO buffers in industrial automation controllers

Memory IC Procurement Notes

Verify that the specific suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) as defined in the official datasheet, distinct from Commercial variants. Confirm the package type matches the 119-bump BGA specification. Ensure voltage requirements align with the 2.5 V or 3.3 V operating ranges documented for this component series.

Memory IC Selection Notes

Select this component when zero bus turnaround latency is required between read and write cycles. Choose the Pipeline mode for higher throughput or Flow Through mode for lower latency single-cycle reads. Verify compatibility with existing system clock frequencies up to 250 MHz and ensure power supply rails match the specified 2.5 V or 3.3 V options.

Memory IC Part Context

This part belongs to the GS81284ZxxGB family of NBT SRAMs manufactured by GSI Technology. These devices are designed to replace legacy ZBT, NtRAM, and NoBL SRAMs while offering enhanced bus efficiency. The 144 Mbit density provides substantial storage capacity within a compact JEDEC-standard footprint suitable for dense PCB layouts.

Memory IC Replacement Considerations

The datasheet confirms full pin-compatibility with pipelined and flow through NtRAM, NoBL, and ZBT SRAMs. When replacing non-GSI parts, verify the state of the Mode Pin (FT). Floating FT pins default to Pipeline mode; tie low for Flow Through replacement.