Infineon Technologies CY14B101LA-BA45XI

Overview

CY14B101LA-BA45XI 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 (+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 data retention in mission-critical logging and control systems.

For engineers reviewing the CY14B101LA-BA45XI datasheet, CY14B101LA-BA45XI pinout, CY14B101LA-BA45XI application, or CY14B101LA-BA45XI equivalent, key selection criteria include AutoStore timing compliance, VCAP capacitor sizing, HSB-driven hardware store sequencing, and ×8 bus interface compatibility with legacy 8-bit microcontrollers and PLCs.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL across all 131,072 bytes without block erasure. It uses internal voltage regulation to charge VCAP and triggers AutoStore when VCC drops below VSWITCH (2.5 V typical), sustaining STORE for ≥10 ms with a 4.7 µF capacitor.

Control logic supports three STORE modes-AutoStore (power-loss triggered), Hardware STORE (HSB pin assertion), and Software STORE (address-sequence write)-with RECALL available at power-up or via software command. The device inhibits SRAM access during STORE/RECALL and guarantees 20-year data retention after 1 million STORE cycles.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), Type II, body size 10.16 mm × 18.41 mm, lead pitch 0.8 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-3AJ5F and FM24V10-G, CY14B101LA-BA45XI uniquely delivers hands-off AutoStore with 1M STORE cycles and 20-year retention in a parallel ×8 interface - essential for safety-critical, high-write industrial controllers where firmware intervention cannot be trusted during brown-out.

Availability

CY14B101LA-BA45XI is available at Aetrix Electronics and suitable for industrial PLC data logging, medical event recording, avionics black box buffering, and railway signaling controller memory requiring stable component supply and long-term lifecycle support.

Supply support for CY14B101LA-BA45XI 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, documentation, and support for the nvSRAM portfolio originally developed by Cypress.

This part belongs to the QuantumTrap nvSRAM product line, engineered specifically for deterministic, battery-free nonvolatile data capture in harsh industrial and safety-critical systems where power integrity cannot be assumed.

FAQ

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

The datasheet specifies a 4.7 µF tantalum capacitor on the VCAP pin as mandatory for guaranteed AutoStore functionality at –40°C to +85°C. Using less capacitance risks incomplete STORE execution during rapid VCC collapse, leading to corrupted nonvolatile data. Ceramic capacitors are not recommended due to DC bias and aging effects that reduce effective capacitance below the 4.7 µF threshold.

Does CY14B101LA-BA45XI support ×16 bus configuration?

No - CY14B101LA-BA45XI is exclusively a 128 K × 8 device. The ×16 variant is the CY14B101NA. This part has pins A0–A16 and DQ0–DQ7 only; BHE/BLE pins are absent, and the internal organization is fixed at 131,072 bytes. Attempting ×16 interface will result in address/data misalignment and undefined behavior.

How does the HSB pin function during a Hardware STORE cycle?

HSB is an open-drain bidirectional pin: when driven LOW externally, it initiates a Hardware STORE; during STORE execution, it is actively pulled LOW to signal busy status. After completion, it transitions HIGH via internal weak pull-up (tHHHD ≈ 100 ns). External pull-up is optional but recommended for noise immunity in noisy industrial environments.

Can RECALL be disabled to retain SRAM contents across power cycles without restoring nonvolatile data?

No - RECALL is automatic at power-up and cannot be disabled. The device always restores the last stored image from QuantumTrap cells into SRAM upon VCC ramp. To preserve volatile SRAM content, the system must perform a Software STORE immediately before intentional power-down and avoid unintended power interruptions that trigger AutoStore with stale data.