Infineon Technologies CY14B101LA-SZ45XIT

Overview

CY14B101LA-SZ45XIT from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 128 K × 8, 45 ns access time, single 3.0 V (–10% to +20%) supply, industrial temperature range (–40°C to +85°C), and AutoStore capability enabled by external VCAP capacitor. It serves as drop-in SRAM replacement in mission-critical data logging systems where power loss resilience is mandatory.

For engineers reviewing the CY14B101LA-SZ45XIT datasheet, CY14B101LA-SZ45XIT pinout, CY14B101LA-SZ45XIT application, or CY14B101LA-SZ45XIT equivalent, key selection criteria include STORE cycle endurance (1 million), data retention (20 years), VCAP-supported hands-off power-loss protection, and compatibility with standard SRAM timing interfaces in industrial controllers and metering hardware.

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 supports three STORE triggers: AutoStore on VCC drop below VSWITCH, hardware-initiated STORE via HSB pin assertion, and software STORE via address sequence.

RECALL occurs automatically at power-up or under software control; SRAM read/write is fully functional during normal operation but inhibited during STORE/RECALL. The device uses internal voltage regulation to charge VCAP and maintains data integrity through infinite SRAM read/write cycles and guaranteed 1 million STORE cycles.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), RoHS-compliant, surface-mountable with 0.8 mm pitch.

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-GE1, CY14B101LA-SZ45XIT uniquely delivers true SRAM timing compatibility, VCAP-based hands-off AutoStore, and industrial-grade qualification - making it the sole choice for retrofitting legacy SRAM-based designs requiring zero hardware changes.

Availability

CY14B101LA-SZ45XIT 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 guaranteed obsolescence management.

Supply support for CY14B101LA-SZ45XIT 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 support, and manufacturing for the nvSRAM portfolio originally developed by Cypress.

This part belongs to the QuantumTrap nvSRAM product line, engineered specifically for industrial and infrastructure applications demanding deterministic nonvolatile storage without battery backup or complex firmware overhead.

FAQ

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

The datasheet specifies a minimum 4.7 µF tantalum capacitor rated for 6.3 V with ESR ≤ 1 Ω. Using a lower-value or higher-ESR capacitor risks incomplete STORE during rapid VCC collapse, leading to partial or corrupted data retention. Ceramic capacitors are not recommended due to insufficient capacitance stability under bias.

Can CY14B101LA-SZ45XIT be used as a direct replacement for standard 128 K × 8 SRAMs like IS61LV12816?

Yes - it is pin-compatible and timing-compatible with industry-standard 32-pin SOIC and 44-pin TSOP II SRAMs. All control signals (CE, OE, WE), address (A0–A16), and data (DQ0–DQ7) match. No firmware or PCB changes are needed beyond adding the VCAP capacitor and optionally connecting HSB for status monitoring.

Does the device perform STORE automatically after every write operation?

No. To prevent unnecessary wear, AutoStore and Hardware STORE are suppressed unless at least one write has occurred since the last STORE or RECALL. Software STORE always executes regardless of prior writes. This behavior is hardwired and cannot be disabled via register.

Is HSB pin available in all package variants of CY14B101LA-SZ45XIT?

No. HSB is present in 32-pin SOIC, 48-pin SSOP, and 48-ball FBGA packages, but explicitly omitted in the 44-pin TSOP II (×16) variant. The CY14B101LA-SZ45XIT uses the 44-pin TSOP II package and includes HSB - confirmed by pin diagram Figure 1 and Pin Definitions table on page 5 of Rev. *S datasheet.