Infineon Technologies CY14B101NA-ZS25XI

Overview

CY14B101NA-ZS25XI from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM organized as 64 K × 16, featuring QuantumTrap nonvolatile storage, 25 ns access time, single 3.0 V ±10% supply, and industrial temperature operation. 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 embedded control and instrumentation systems.

For engineers reviewing the CY14B101NA-ZS25XI datasheet, CY14B101NA-ZS25XI pinout, CY14B101NA-ZS25XI application, or CY14B101NA-ZS25XI equivalent, key selection considerations include ×16 bus width support, HSB-controlled hardware STORE timing, VCAP capacitor sizing, and compatibility with legacy SRAM interfaces requiring nonvolatile backup without external controllers.

Technical Context

The device integrates standard SRAM array (64 K × 16) with parallel QuantumTrap nonvolatile elements per cell, enabling simultaneous STORE/RECALL across all memory locations. It operates in three STORE modes: AutoStore (power-loss triggered), Hardware STORE (HSB pin assertion), and Software STORE (address-sequence initiated).

RECALL occurs automatically at power-up or via software command; SRAM read/write is inhibited during STORE/RECALL cycles. The HSB pin serves dual role - input to trigger hardware STORE and open-drain output indicating STORE progress - and is absent in 44-pin TSOP II ×16 variants.

Key Specifications

Pinout & Package

Package: 48-pin shrink small-outline package (SSOP), RoHS-compliant, body size 10.2 mm × 7.5 mm × 2.0 mm.

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, CY14B101NA-ZS25XI delivers faster 25 ns parallel access, native ×16 bus support, and deterministic AutoStore timing via VCAP - making it optimal for real-time control systems requiring SRAM-equivalent performance with nonvolatile backup.

Availability

CY14B101NA-ZS25XI is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and avionics black box buffer applications requiring stable component supply and long-term lifecycle support.

Supply support for CY14B101NA-ZS25XI 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 the nvSRAM product line under its Industrial & Power Control division.

This part belongs to the QuantumTrap nvSRAM family, designed specifically for systems needing SRAM-speed access with guaranteed nonvolatile data retention during uncontrolled power loss - targeting industrial automation, medical electronics, and transportation infrastructure.

FAQ

What is the function of the VCAP pin, and what capacitor value is required?

The VCAP pin connects to an external capacitor that stores energy used to complete the STORE operation during VCC dropout. A 12 µF tantalum or 22 µF ceramic capacitor is required, rated for ≥3.6 V. Insufficient capacitance causes incomplete STORE and data corruption. The internal regulator charges VCAP to VCC during normal operation.

Is CY14B101NA-ZS25XI pin-compatible with standard 48-pin SSOP SRAMs?

It is pin-compatible with industry-standard 48-pin SSOP ×16 SRAMs for address, data, and core control signals (A0–A15, DQ0–DQ15, CE, WE, OE, VCC, VSS). However, BHE/ BLE and HSB pins are additional, and NC pin assignments differ - PCB layout must accommodate these unique signals and omit pull-ups on unused HSB if not implemented.

How does AutoStore distinguish between valid and spurious power drops?

AutoStore activates only when VCC falls below VSWITCH (typically 2.5 V) and remains low for >100 ns. Additionally, STORE is suppressed unless at least one SRAM write has occurred since the last STORE or RECALL - preventing unnecessary nonvolatile writes during transient dips or brownouts.

Can RECALL be disabled or delayed at power-up?

No - automatic RECALL is hardwired and begins immediately upon VCC crossing VPU (≈2.0 V). There is no hardware disable. To defer SRAM access, hold CE HIGH or assert reset to the host processor until RECALL completes (~1 ms typical), verified by monitoring HSB going HIGH after power-up.