GS8642Z36GB-250I

Memory IC Overview

The GS8642Z36GB-250I is a 72 Mbit Static Random Access Memory (SRAM) device organized as 2 Megawords by 36 bits. It operates with a maximum clock frequency of 250 MHz and features an access time of 6.5 ns. The component supports dual voltage supplies, accepting a core power supply between 2.3 V and 2.7 V or 3.0 V to 3.6 V, alongside corresponding I/O supply ranges. It utilizes a parallel interface and is housed in a 119-pin Fine-Pitch Ball Grid Array (FPBGA) package measuring 22 mm by 14 mm. The industrial temperature grade ensures reliable operation within a junction temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports NBT (No Bus Turn Around) functionality for zero wait Read-Write-Read bus utilization
• Features user-configurable Pipeline and Flow Through architecture modes
• Includes IEEE 1149.1 JTAG-compatible Boundary Scan capability
• Provides LBO pin support for Linear or Interleave Burst mode selection

Memory IC Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in network processing systems
• Data storage in industrial control applications requiring wide data buses

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature rating (-40°C to +85°C) distinct from commercial variants. Confirm the 119-FPBGA footprint matches the target PCB design constraints. Ensure voltage supply rails align with the specified 2.5V or 3.3V operational requirements. Check for RoHS compliance status if environmental regulations apply to the assembly process.

Memory IC Selection Notes

Select this component when a 36-bit wide data path is required at high speeds up to 250 MHz. The NBT feature is critical for systems needing efficient mixed read-write cycles without turnaround latency. Choose the FPBGA package for high-density surface mount applications where space is limited. Verify that the system power supplies can maintain stability within the tight tolerance ranges defined for the core and I/O voltages.

Memory IC Part Context

This part belongs to the GS8642Z36GB series of NBT SRAMs manufactured by GSI Technology. It shares architectural similarities with other devices in the family but is distinguished by its 36-bit width and specific speed grade. The series is designed to be pin-compatible with various pipeline and flow-through SRAM architectures, facilitating design flexibility across different memory configurations.

Memory IC Replacement Considerations

Direct substitutes include other GS8642Z36GB variants with different speed grades or temperature ratings, provided the electrical parameters meet system requirements. Cross-family replacements must match the 119-pin BGA footprint and 36-bit organization.