Infineon Technologies CY14B104NA-BA20XI

Overview

CY14B104NA-BA20XI from Cypress Semiconductor is a 4-Mbit non-volatile SRAM (nvSRAM) with 256K × 16 organization, 20 ns access time, single 3 V (+20%, –10%) supply, and QuantumTrap non-volatile storage. It performs automatic STORE on power-down using an external VCAP capacitor and supports software/hardware-initiated STORE/RECALL. Used in industrial control systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B104NA-BA20XI datasheet, CY14B104NA-BA20XI pinout, CY14B104NA-BA20XI application, or CY14B104NA-BA20XI equivalent, key selection criteria include ×16 bus interface support, HSB-controlled hardware STORE timing, VCAP-based AutoStore reliability, and 1 million STORE endurance with 20-year data retention.

Technical Context

This nvSRAM integrates standard SRAM cells with parallel QuantumTrap non-volatile elements per cell, enabling simultaneous STORE/RECALL across all 256K words. The architecture decouples volatile read/write performance (20 ns tAA) from non-volatile endurance (1M STORE cycles), eliminating wear leveling overhead.

STORE operations are triggered by power loss (via VCAP discharge below VSWITCH), HSB pin assertion, or software address sequence; RECALL occurs automatically at power-up or via software command. The HSB pin serves dual role: input to initiate STORE and open-drain output indicating busy state during STORE/RECALL.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V10-G and MB85RS4MT-Y, CY14B104NA-BA20XI uniquely combines industrial temperature rating, HSB-driven hardware STORE, and VCAP-based AutoStore - making it optimal for systems requiring guaranteed non-volatile capture under uncontrolled power failure conditions.

Availability

CY14B104NA-BA20XI is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion devices, telecom base stations, and automotive ADAS modules requiring stable component supply with long lifecycle assurance.

Supply support for CY14B104NA-BA20XI 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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications markets.

The CY14B nvSRAM product line delivers battery-free non-volatility using QuantumTrap technology, targeting applications where data persistence must survive uncontrolled power loss without firmware intervention.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14B104NA-BA20XI requires a 0.1 µF ceramic capacitor on the VCAP pin to ensure successful AutoStore during VCC dropout. This value is specified in the DC Electrical Characteristics table (page 9 of datasheet 001-49918 Rev. *O) and validated for worst-case voltage droop profiles across industrial temperature range.

Does the HSB pin function identically in both ×8 and ×16 configurations?

No - the HSB pin is not available in the 44-pin TSOP II package for ×16 configuration (per Note 9, page 5). It is present and fully functional in the 48-ball FBGA (BA20XI) and 54-pin TSOP II packages, supporting both STORE initiation and busy indication in ×16 mode.

How does the device prevent unintended STORE operations during normal operation?

The CY14B104NA-BA20XI implements a write-latch mechanism: AutoStore and hardware STORE are ignored unless at least one SRAM write has occurred since the last STORE or RECALL cycle. This prevents spurious non-volatile writes during idle or read-only states.

Can software RECALL be performed while the system is running?

Yes - software RECALL is initiated by a specific address sequence and restores data from QuantumTrap cells to SRAM without requiring power cycle. However, SRAM access is inhibited during the RECALL operation, so timing must be coordinated to avoid system interruption.