Infineon Technologies CY14B104NA-ZSP25XI

Overview

CY14B104NA-ZSP25XI from Cypress Semiconductor is a 4-Mbit non-volatile SRAM (nvSRAM) organized as 256K × 16, featuring QuantumTrap non-volatile storage, 25 ns access time, single 3 V (+20% / –10%) supply operation, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using an external VCAP capacitor and supports software- or hardware-triggered STORE/RECALL cycles for mission-critical data retention in systems requiring zero-battery backup.

For engineers reviewing the CY14B104NA-ZSP25XI datasheet, CY14B104NA-ZSP25XI pinout, CY14B104NA-ZSP25XI application, or CY14B104NA-ZSP25XI equivalent, key selection considerations include ×16 bus width support, HSB-controlled hardware STORE timing, VCAP capacitor sizing (0.1 µF), BHE/ BLE byte enable functionality, and compatibility with legacy SRAM interfaces without redesign.

Technical Context

The CY14B104NA-ZSP25XI integrates standard SRAM array (2048 × 2048) with parallel QuantumTrap non-volatile elements per cell, enabling simultaneous STORE/RECALL across all 256K words. Its architecture inhibits SRAM access during STORE/RECALL, with dedicated control logic for AutoStore activation via VCAP voltage monitoring at VSWITCH threshold.

It implements three STORE initiation modes-AutoStore (power-loss triggered), Hardware STORE (HSB pin assertion), and Software STORE (address sequence)-with conditional execution: STORE only proceeds if at least one write occurred since last RECALL, except for software-initiated cycles which execute unconditionally.

Key Specifications

Pinout & Package

Package: 48-ball fine-pitch ball grid array (FBGA), RoHS-compliant, industrial-grade thermal profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B104LA-ZS25XI, the CY14B104NA-ZSP25XI offers native ×16 bus efficiency and byte-select granularity, while FM24V10-G trades parallel simplicity for serial footprint reduction and unlimited endurance - making CY14B104NA optimal for high-throughput industrial SRAM drop-ins needing deterministic STORE timing.

Availability

CY14B104NA-ZSP25XI is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and telecom base station configuration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY14B104NA-ZSP25XI 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.

The CY14B nvSRAM product line was designed specifically to replace battery-backed SRAM in mission-critical systems, delivering seamless SRAM compatibility with integrated QuantumTrap non-volatile storage and zero-maintenance data retention.

FAQ

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

The VCAP pin supplies regulated power to the internal QuantumTrap STORE circuit during VCC collapse. A 0.1 µF ceramic capacitor must be connected between VCAP and VSS to ensure sufficient charge for one complete STORE operation. Using a smaller capacitor risks incomplete STORE and data corruption; larger values do not improve reliability and may delay power-up RECALL timing.

How does the HSB pin operate during STORE and what external circuitry is needed?

HSB is an open-drain pin with internal 100 kΩ weak pull-up. It is driven LOW by the device during any STORE operation (AutoStore, Hardware, or Software) and returns HIGH upon completion. No external pull-up is mandatory, but a 10 kΩ resistor to VCC improves noise immunity. External assertion of HSB LOW initiates Hardware STORE after tDELAY, provided a prior write occurred.

Can CY14B104NA-ZSP25XI be used as a direct replacement for standard 256K × 16 SRAMs?

Yes - it is pin- and timing-compatible with industry-standard 256K × 16 asynchronous SRAMs, including identical CE/OE/WE timing, address/data bus mapping, and BHE/ BLE byte enable behavior. No changes to PCB layout or firmware timing are required; however, VCAP capacitor addition and optional HSB monitoring are necessary to enable non-volatile functionality.

What happens if AutoStore is enabled but no VCAP capacitor is installed?

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 transfer and corrupted data in the non-volatile array. To prevent this, AutoStore must be disabled via the software sequence documented in the datasheet (page 8) before operating without VCAP.