Infineon Technologies CY14B101NA-ZS25XIT

Overview

CY14B101NA-ZS25XIT 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- or hardware-initiated STORE/RECALL cycles in embedded systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B101NA-ZS25XIT datasheet, CY14B101NA-ZS25XIT pinout, CY14B101NA-ZS25XIT application, or CY14B101NA-ZS25XIT equivalent, key selection criteria include ×16 bus width support, HSB-controlled hardware STORE timing, VCAP-based AutoStore energy budget, and compatibility with legacy SRAM interfaces in mission-critical data logging and control systems.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous STORE/RECALL across all 65,536 words. The architecture inhibits SRAM access during nonvolatile operations and guarantees infinite SRAM read/write cycles alongside 1 million STORE endurance and 20-year data retention.

AutoStore triggers when VCC drops below VSWITCH (~2.7 V), disconnecting VCAP from VCC and using stored charge to complete a full 64 K-word STORE in ≤20 ms. Hardware STORE is initiated by pulling HSB low, while software STORE uses a specific address sequence - both bypass the AutoStore write-count dependency.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), Type II, RoHS-compliant, 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, CY14B101NA-ZS25XIT uniquely delivers parallel ×16 interface, hardware-triggered STORE via HSB, and autonomous power-loss response - making it optimal for real-time control systems requiring guaranteed, low-latency nonvolatile save without firmware involvement.

Availability

CY14B101NA-ZS25XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and automotive body control modules requiring stable component supply and long-term lifecycle support.

Supply support for CY14B101NA-ZS25XIT 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, specializing in power management, sensing, connectivity, and memory solutions for industrial, automotive, and IoT applications.

CY14B101NA-ZS25XIT belongs to Infineon's nvSRAM product line, designed specifically to replace battery-backed SRAM in harsh-environment systems where reliability, zero-maintenance operation, and deterministic power-loss recovery are mandatory.

FAQ

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

The VCAP pin connects to an external capacitor that supplies energy for the AutoStore operation during power loss. A 12 μF tantalum or 22 μF ceramic capacitor is required to ensure reliable STORE completion across the full industrial temperature range and worst-case VCC dropout profile. The internal regulator charges VCAP to ~2.7 V during normal operation; insufficient capacitance causes data corruption during STORE.

How does the HSB pin operate during Hardware STORE and AutoStore?

HSB is an open-drain bidirectional pin. During Hardware STORE, driving HSB LOW initiates the operation; the device then drives HSB LOW until STORE completes, after which it releases the line to HIGH via weak internal pull-up. During AutoStore, HSB is driven LOW automatically upon VCC dropout and remains LOW until STORE finishes - allowing the host to monitor STORE status without polling.

Can CY14B101NA-ZS25XIT be used in a ×8 configuration?

No - CY14B101NA is factory-configured for 64 K × 16 organization only. The "NA" suffix denotes the ×16 variant; the ×8 version is CY14B101LA. Pinouts, address mapping (A0–A15), and data bus width (DQ0–DQ15) are fixed for ×16 operation. Attempting ×8 use would result in incorrect addressing and data corruption.

What happens if AutoStore is enabled but no capacitor is connected to VCAP?

If AutoStore is enabled (default state) and no capacitor is connected to VCAP, the device attempts STORE on power loss using insufficient charge, resulting in incomplete or corrupted data transfer to QuantumTrap cells. The datasheet mandates disabling AutoStore via software sequence before operating without VCAP - otherwise, nonvolatile data integrity cannot be guaranteed.