Infineon Technologies CY14B101LA-ZS25XI

Overview

CY14B101LA-ZS25XI from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 128 K × 8, 25 ns access time, single 3.0 V ±10% supply, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using an external VCAP capacitor and supports software- or hardware-triggered STORE/RECALL operations in embedded systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B101LA-ZS25XI datasheet, CY14B101LA-ZS25XI pinout, CY14B101LA-ZS25XI application, or CY14B101LA-ZS25XI equivalent, key selection considerations include AutoStore timing dependency on VCAP capacitance, HSB pin behavior during hardware STORE, ×8 vs ×16 configuration compatibility, and QuantumTrap endurance limits (1 million STORE cycles, 20-year data retention).

Technical Context

This nvSRAM integrates standard SRAM cells with parallel-connected QuantumTrap nonvolatile elements per cell, enabling simultaneous STORE/RECALL across all 131,072 bytes. The architecture decouples volatile read/write (infinite cycles) from nonvolatile STORE (1M cycles) and RECALL (infinite), with internal power switching between VCC and VCAP during brownout.

AutoStore activation occurs when VCC drops below VSWITCH (2.2 V typ.), triggering internal disconnection of VCAP from VCC and initiating STORE using stored charge. Hardware STORE is initiated by driving HSB low, while software STORE uses a specific address write sequence; both inhibit SRAM access until completion.

Key Specifications

Pinout & Package

Package: 32-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, body width 300 mil, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nvSRAM applications.

Compared with FM24V10-G and MB85RS1MT-FPN-GE1, CY14B101LA-ZS25XI uniquely delivers parallel-SRAM compatibility, autonomous power-loss STORE, and industrial temperature support in a single package-making it optimal for legacy SRAM drop-in upgrades requiring zero firmware changes and guaranteed data capture.

Availability

CY14B101LA-ZS25XI is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, avionics black box memory, and smart grid meter firmware state retention requiring stable component supply and long-term lifecycle assurance.

Supply support for CY14B101LA-ZS25XI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and security solutions with vertical integration from silicon to system-level IP.

CY14B101LA-ZS25XI belongs to Infineon's nvSRAM product line, designed specifically for mission-critical industrial and medical applications where data persistence must be guaranteed without batteries, supercaps, or firmware dependencies.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14B101LA-ZS25XI requires a minimum 4.7 µF ±20% tantalum capacitor on the VCAP pin to ensure successful STORE completion at VCC = 2.7 V and T_A = +85°C. Lower values risk incomplete STORE and data corruption. Ceramic capacitors are not recommended due to insufficient capacitance retention under DC bias.

Can CY14B101LA-ZS25XI be used as a direct replacement for standard SRAM in existing designs?

Yes, it is pin-compatible with industry-standard 32-pin SOIC 128K×8 SRAMs (e.g., IS61LV12816AL), but requires adding a VCAP capacitor and optionally pulling up WE. No firmware changes are needed for basic read/write; AutoStore activates automatically on power loss without host involvement.

Does the HSB pin require an external pull-up resistor?

No external pull-up is mandatory: after STORE completion, HSB is actively driven HIGH for t_HHHD (200 ns min), then held HIGH by an internal weak pull-up. An external 4.7 kΩ pull-up is optional for noise immunity in electrically noisy environments but not required for functional operation.

How does software STORE differ from AutoStore in terms of data integrity guarantees?

Software STORE executes immediately upon command and completes within t_ST (15 ms max), independent of VCC level. AutoStore only triggers when VCC falls below V_SWITCH (2.2 V), relying on VCAP charge; if VCAP is undersized or degraded, AutoStore may fail silently. Software STORE thus provides deterministic, verifiable persistence where timing control is essential.