CY7C1345G-100AXCT

Memory IC Overview

The CY7C1345G-100AXCT is a 4-Mbit (128K × 36) synchronous static random-access memory manufactured by Infineon Technologies. It features an 8.0 ns maximum access time and supports a 100 MHz clock frequency. The device utilizes a 100-pin TQFP package with surface-mount installation. Electrical specifications include a 3.3 V core supply voltage range of 3.135 V to 3.6 V, and a 2.5 V or 3.3 V I/O supply. Maximum operating current is 205 mA, while maximum standby current is 40 mA. The industrial temperature rating spans from -40 °C to +85 °C.

Memory IC Feature Summary

• Supports user-selectable linear or interleaved burst sequences via the MODE input pin for compatibility with various processor architectures.
• Integrates separate processor (ADSP) and controller (ADSC) address strobes to facilitate distinct interface control paths.
• Includes asynchronous output enable and ZZ sleep mode inputs for power management and bus control flexibility.

Memory IC Applications

• Secondary cache memory in high-speed microprocessor systems
• Buffering applications requiring fast data throughput
• Systems utilizing Intel Pentium or i486 processor architectures

Memory IC Procurement Notes

Verify component authenticity through authorized distribution channels due to potential counterfeit risks. Confirm that the ZZ pin is externally connected to ground as required by silicon errata documentation. Ensure power supply sequencing meets specified ramp-up requirements before initiating read or write operations to maintain data integrity.

Memory IC Selection Notes

Select this component when interfacing with processors requiring a 36-bit data width and synchronous flow-through architecture. Verify that the system design accommodates the specific 100-pin TQFP footprint and thermal resistance characteristics. Confirm that the available 2.5 V or 3.3 V I/O supply aligns with the target logic levels.

Memory IC Part Context

This part belongs to the CY7C1345G family of 4-Mbit synchronous SRAMs. It shares architectural similarities with other members like the CY7C1345G-100AXI but differs in packaging and termination specifications. The series is designed for low-glue-logic integration with high-speed CPUs.

Memory IC Replacement Considerations

Direct substitutes within the same family include CY7C1345G-100AXI and CY7C1345G-100AXC. Cross-family replacements require verification of pinout compatibility and electrical parameter alignment.

Memory IC FAQ

How is the burst sequence order determined?

The burst sequence is selected by the MODE input pin. A LOW level selects a linear burst sequence, while a HIGH level or floating state selects an interleaved burst sequence.

What is the function of the ZZ pin?

The ZZ pin is an asynchronous sleep input. Asserting it places the device in a non-time critical sleep condition with data integrity preserved. Errata requires this pin to be externally connected to ground during normal operation.