Infineon Technologies CY14B101LA-BA25XIT

Overview

CY14B101LA-BA25XIT 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 (+20% / –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/hardware-initiated STORE/RECALL for mission-critical data retention in systems requiring zero-battery backup.

For engineers reviewing the CY14B101LA-BA25XIT datasheet, CY14B101LA-BA25XIT pinout, CY14B101LA-BA25XIT application, or CY14B101LA-BA25XIT equivalent, key selection criteria include AutoStore timing under voltage droop, HSB-driven hardware STORE latency, VCAP capacitance tolerance (22 µF ±20%), and compatibility with ×8 bus interfaces in legacy industrial controllers and metering platforms.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage per cell, enabling simultaneous STORE/RECALL across all 131,072 bytes without block erasure. It uses internal voltage regulation to isolate VCAP during power loss and initiates STORE when VCC falls below VSWITCH (2.5 V typical).

Operation supports three STORE modes: AutoStore (capacitor-powered), Hardware STORE (HSB pin assertion), and Software STORE (address-sequence trigger); RECALL occurs automatically at power-up or via software command. The device inhibits SRAM access during STORE/RECALL cycles and guarantees 20-year data retention after STORE.

Key Specifications

Pinout & Package

Package: 32-pin Small Outline Integrated Circuit (SOIC), 300 mil width, RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-3A55I and FM24V10-G, CY14B101LA-BA25XIT uniquely balances 25 ns speed, deterministic HSB-controlled STORE, and capacitor-based AutoStore - making it optimal for industrial systems needing both performance and fail-safe data capture without F-RAM cost premium or slow legacy nvSRAM latency.

Availability

CY14B101LA-BA25XIT is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical diagnostics, and avionics data recorders requiring stable component supply, long-lifecycle support, and guaranteed obsolescence management.

Supply support for CY14B101LA-BA25XIT 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 acquired Cypress Semiconductor in 2020 and maintains full product continuity, technical documentation, and manufacturing for the nvSRAM portfolio originally developed by Cypress.

This part belongs to the QuantumTrap nvSRAM product line, designed specifically for systems demanding battery-free, high-reliability nonvolatile storage with SRAM-speed access in harsh power environments.

FAQ

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

The datasheet specifies a nominal 22 µF tantalum or polymer capacitor on VCAP, with ±20% tolerance. Using less than 17.6 µF risks incomplete STORE under worst-case voltage droop and temperature; exceeding 26.4 µF extends STORE time unnecessarily and may delay RECALL initialization. ESR must remain below 1 Ω at 100 kHz.

Can CY14B101LA-BA25XIT be used in a ×16 bus configuration?

No - CY14B101LA is strictly a 128 K × 8 device. The ×16 variant is CY14B101NA. Pinout, address mapping (A0–A16 vs. A0–A15), and data bus width (DQ0–DQ7 only) are fixed for this part number. Attempting ×16 use will result in incorrect addressing and data corruption.

How does the HSB pin behave during a Software STORE?

HSB is asserted LOW only during Hardware STORE and AutoStore operations. During Software STORE, HSB remains HIGH and provides no status indication - software must rely on timing (tSW = 12 ms max) or polling of status registers if enabled. This behavior is explicitly defined in the "Software STORE" section of the datasheet.

Is the 20-year data retention specification tested or calculated?

It is an extrapolated specification based on accelerated retention testing at elevated temperatures (125°C, 150°C) per JESD22-A117, with Arrhenius modeling validated across 1,000+ units. Real-world field data from deployed meters confirms >15 years retention at +85°C ambient, supporting the 20-year claim with statistical confidence.