CY14B108M-ZSP45XIT

Memory IC Overview

The Infineon CY14B108M-ZSP45XIT is an 8-Mbit nonvolatile static RAM (nvSRAM) with a real-time clock, organized as 512K x 16. It features 45 ns access time and operates on a single 3 V power supply (+20%, -10%). The device uses QuantumTrap technology for infinite read/write cycles and up to 1 million STORE cycles, ensuring 20-year data retention. It includes automatic STORE on power-down via a capacitor, hardware/software STORE/RECALL capabilities, and industrial temperature range operation (-40°C to +85°C).

Memory IC Feature Summary

• Integrates SRAM with QuantumTrap nonvolatile memory for infinite read/write cycles.
• Includes a full-featured real-time clock with alarm and watchdog timer functions.
• Supports automatic STORE on power-down using only a small external capacitor.
• Provides hardware and software controlled STORE and RECALL operations.

Memory IC Applications

• Industrial control systems requiring persistent data storage.
• Embedded applications needing accurate timekeeping without external components.
• Data logging systems with frequent write cycles.
• Automotive electronics operating in harsh environments.

Memory IC Procurement Notes

Verify the specific suffix ZSP45XIT corresponds to the 54-pin TSOP II package and reel packaging. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check for any silicon errata regarding AutoStore disable functionality before finalizing design implementation.

Memory IC Selection Notes

Select this part if a 16-bit data bus width is required alongside integrated RTC functionality. Ensure the system can accommodate the necessary VCAP capacitor for AutoStore operations. Verify that the 45 ns access time meets the timing constraints of the host processor interface.

Memory IC Part Context

This component belongs to the CY14B108 family of nvSRAMs, which also includes the 8-bit organization variant (CY14B108K). It is manufactured by Infineon Technologies, formerly Cypress Semiconductor. The device combines high-speed SRAM performance with nonvolatile data retention in a single monolithic integrated circuit.

Memory IC Replacement Considerations

Direct substitutes include CY14B108K-ZSP45XIT for 8-bit configurations. Other CY14B series devices may offer different capacities or pinouts but require careful interface verification.

Memory IC FAQ

How is the AutoStore function initiated?

AutoStore is initiated automatically when VCC drops below VSWITCH, provided a capacitor is connected to the VCAP pin. It requires at least one write operation since the last STORE or RECALL cycle.

What is the role of the HSB pin?

The Hardware STORE Busy (HSB) pin indicates the busy status during STORE operations. Driving it LOW requests a Hardware STORE cycle, and it stays LOW while the operation is in progress.

Can the RTC oscillator be stopped to save battery life?

Yes, the OSCEN bit in the calibration register controls the oscillator. Setting it to '1' disables the oscillator, extending battery life during storage or low-power modes.