Infineon Technologies CY14B101LA-SZ25XIT

Overview

CY14B101LA-SZ25XIT 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% to +20%) supply, industrial temperature range (–40°C to +85°C), and integrated AutoStore on power-loss. It serves as drop-in SRAM replacement in mission-critical data logging, metering, and control systems requiring guaranteed data retention without external backup.

For engineers reviewing the CY14B101LA-SZ25XIT datasheet, CY14B101LA-SZ25XIT pinout, CY14B101LA-SZ25XIT application, or CY14B101LA-SZ25XIT equivalent, key selection factors include VCAP capacitor dependency for AutoStore, HSB pin behavior during hardware STORE, ×8 vs ×16 configuration compatibility, and 1 million STORE endurance versus infinite RECALL cycles.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL across all 131,072 bytes. The architecture supports three STORE triggers: AutoStore (VCC drop below VSWITCH), Hardware STORE (HSB assertion), and Software STORE (address sequence), with SRAM read/write inhibited during STORE/RECALL.

It operates in two memory configurations: ×8 (A0–A16, DQ0–DQ7) and ×16 (A0–A15, DQ0–DQ15, BHE/ BLE). The HSB pin functions both as status output (LOW during STORE) and input (external LOW initiates STORE), while VCAP supplies regulated energy for reliable power-loss STORE using an external capacitor.

Key Specifications

Pinout & Package

Package: 32-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, lead-free, industrial-grade plastic body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V10-G and MB85RS1MT-FPN-G-JNE1, CY14B101LA-SZ25XIT uniquely delivers true SRAM timing with automatic, capacitor-powered STORE on power failure - making it the only choice for legacy SRAM socket upgrades requiring zero firmware changes and guaranteed hands-off data retention.

Availability

CY14B101LA-SZ25XIT is available at Aetrix Electronics and suitable for smart metering, industrial PLC data logging, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and drop-in SRAM compatibility.

Supply support for CY14B101LA-SZ25XIT 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 strong IP in memory and embedded control.

CY14B101LA-SZ25XIT belongs to Infineon's nvSRAM product line, designed specifically for industrial and infrastructure applications demanding SRAM speed with nonvolatile data integrity during uncontrolled power loss.

FAQ

What is the minimum VCAP capacitor value required for reliable AutoStore?

The datasheet specifies a minimum 4.7 µF tantalum capacitor on VCAP, rated ≥6.3 V, with ESR ≤5 Ω. Lower capacitance risks incomplete STORE under fast VCC collapse; higher values extend STORE margin but increase board area and cost. Ceramic capacitors are not recommended due to insufficient energy density and voltage coefficient effects.

Can CY14B101LA-SZ25XIT operate in ×16 mode?

No - CY14B101LA is fixed ×8 configuration (128 K × 8), while CY14B101NA supports ×16 (64 K × 16). The -SZ25XIT suffix confirms SOIC-32 packaging and 25 ns speed grade, which is only offered for the LA variant. Pinout and address mapping differ; mixing configurations causes addressing errors and data corruption.

How does HSB behave during power-up and RECALL?

During power-up, HSB is driven HIGH for tHHHD (≤100 ns) after VCC crosses VSWITCH, then held HIGH by weak internal pull-up. It remains HIGH throughout RECALL and normal operation unless a STORE is initiated. External pull-up is optional but recommended to ensure defined state during reset sequencing and avoid floating inputs.

Is software STORE compatible with all microcontroller buses?

Yes - software STORE uses a standard SRAM write sequence (three consecutive writes to address 0x0000 with specific data values), requiring only standard CE/OE/WE timing. It works with 8051, ARM Cortex-M, PIC, and FPGA-based controllers without special drivers or timing adjustments beyond standard SRAM interface compliance.