Infineon Technologies CY14B101LA-SP25XIT

Overview

CY14B101LA-SP25XIT 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 systems where power interruption must not cause data loss.

For engineers reviewing the CY14B101LA-SP25XIT datasheet, CY14B101LA-SP25XIT pinout, CY14B101LA-SP25XIT application, or CY14B101LA-SP25XIT equivalent, key selection criteria include VCAP capacitor sizing for reliable AutoStore, HSB timing during hardware-initiated STORE, software STORE address sequence compliance, and ×8 vs ×16 configuration compatibility with host bus interface.

Technical Context

This nvSRAM integrates parallel SRAM and nonvolatile QuantumTrap cells per bit, enabling simultaneous STORE/RECALL across all 131,072 bytes without sequential addressing. STORE operations transfer data from volatile SRAM to nonvolatile elements using charge stored on the external VCAP capacitor when VCC drops below VSWITCH (2.7 V typical).

RECALL restores data on power-up or via software command; both operations inhibit SRAM read/write. The device supports three STORE triggers-AutoStore (power-down), Hardware STORE (HSB pin assertion), and Software STORE (address-based write sequence)-with 1 million STORE endurance and 20-year data retention.

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 nonvolatile SRAM applications.

Compared with STK14C88-3AJ5F and FM24V10-G, CY14B101LA-SP25XIT delivers the fastest access time among nvSRAM alternatives, eliminates battery dependency, and offers highest density in its class-making it optimal for new designs prioritizing speed, reliability, and simplified power-loss handling.

Availability

CY14B101LA-SP25XIT is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC data logging, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for CY14B101LA-SP25XIT 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, delivering power systems, microcontrollers, sensors, and memory solutions for industrial, automotive, and IoT applications.

CY14B101LA-SP25XIT belongs to Infineon's nvSRAM product line, designed specifically to replace battery-backed SRAM in safety-critical and maintenance-free embedded systems where data persistence during power loss is mandatory.

FAQ

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

The CY14B101LA-SP25XIT requires a minimum 4.7 µF tantalum or 10 µF ceramic capacitor on the VCAP pin. This value ensures sufficient stored energy to complete a full STORE cycle when VCC drops from 3.0 V to VSWITCH (2.7 V) within the specified tVCPH timing window. Lower values risk incomplete STORE and data corruption.

Can CY14B101LA-SP25XIT be used in a ×16 bus configuration?

No. CY14B101LA-SP25XIT is specifically configured as 128 K × 8 (8-bit data bus). The ×16 variant is the CY14B101NA. Pinout, address mapping (A0–A16 vs A0–A15), and DQ pin count differ; attempting ×16 use will result in incorrect addressing and data misalignment.

How does the HSB pin function during a hardware STORE operation?

When HSB is driven LOW externally, the device initiates a hardware STORE. During execution, HSB remains LOW. Upon completion, it is actively driven HIGH for tHHHD (typically 100 ns), then held HIGH by an internal weak pull-up. Monitoring HSB allows the host system to detect STORE completion and avoid bus contention.

Is software STORE compatible with all host processors without timing constraints?

Software STORE requires a precise 6-byte address write sequence (0xAA, 0x55, 0xAA, 0x55, 0xA0, 0xF0) to a specific location. It must be executed with strict address and data setup/hold timing relative to WE and CE edges. Microcontrollers with configurable GPIO timing or dedicated memory-mapped peripherals handle this reliably; bit-banged implementations require cycle-accurate control.