Infineon Technologies CY14B104NA-ZSP45XIT

Overview

CY14B104NA-ZSP45XIT from Cypress Semiconductor is a 4-Mbit non-volatile SRAM (nvSRAM) with 256K × 16 organization, 45 ns access time, single 3 V (+20%, –10%) supply operation, and QuantumTrap non-volatile storage technology. It performs automatic STORE on power-down using an external VCAP capacitor and supports software- or hardware-initiated STORE/RECALL. Used in industrial control systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B104NA-ZSP45XIT datasheet, CY14B104NA-ZSP45XIT pinout, CY14B104NA-ZSP45XIT application, or CY14B104NA-ZSP45XIT equivalent, key selection criteria include ×16 bus width support, HSB-controlled hardware STORE capability, AutoStore timing dependency on VCAP capacitance, and compatibility with industrial temperature range (–40°C to +85°C) designs.

Technical Context

This nvSRAM integrates standard SRAM cells with parallel-connected QuantumTrap non-volatile elements per cell, enabling simultaneous STORE/RECALL across all 256K words. The architecture decouples volatile read/write performance (infinite cycles) from non-volatile endurance (1 million STOREs, 20-year retention).

STORE is 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. Control logic inhibits SRAM access during STORE/RECALL, with HSB signaling busy status as open-drain output.

Key Specifications

Pinout & Package

Package: 48-ball fine-pitch ball grid array (FBGA), RoHS-compliant, 7 mm × 9 mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-45I and FM24V10-G, CY14B104NA-ZSP45XIT uniquely combines hands-off AutoStore, single-supply operation, and 1-million-cycle STORE endurance-reducing firmware complexity and eliminating external HV generation or STORE scheduling logic.

Availability

CY14B104NA-ZSP45XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device configuration storage, and telecom base station alarm buffering requiring stable component supply across extended product lifecycles.

Supply support for CY14B104NA-ZSP45XIT 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 high-reliability memory, PSoC mixed-signal ICs, and USB connectivity solutions.

CY14B104NA belongs to Cypress's QuantumTrap nvSRAM product line, designed specifically for mission-critical industrial and medical systems needing zero-battery non-volatile memory with predictable STORE/RECALL timing and long-term data integrity.

FAQ

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

The CY14B104NA-ZSP45XIT requires a minimum 0.1 µF ceramic capacitor on the VCAP pin to guarantee successful AutoStore execution at 45 ns access speed during VCC dropout. Lower values may cause incomplete STORE and data corruption; X7R dielectric with ≤2 Ω ESR is recommended for stable discharge characteristics across –40°C to +85°C.

Can the HSB pin be left unconnected in systems that only use AutoStore or software STORE?

Yes-the HSB pin is optional if hardware STORE is not used. It defaults to high-impedance when unused and does not affect AutoStore or software STORE functionality. However, leaving it unconnected forfeits real-time STORE progress monitoring and eliminates the ability to externally trigger STORE via this pin.

How does the CY14B104NA-ZSP45XIT handle partial STORE operations during power interruption?

The device implements atomic STORE: either the entire 256K × 16 memory array is saved successfully, or no STORE occurs. If VCAP voltage falls below the internal threshold before completion, the operation aborts and SRAM contents remain unchanged-no partial or corrupted non-volatile writes are possible.

Is the ×16 bus width compatible with legacy ×8 microcontrollers?

Yes-by tying BHE HIGH and using only DQ0–DQ7, the CY14B104NA-ZSP45XIT operates in ×8 mode with A0–A18 addressing. This maintains pin compatibility with existing 8-bit bus interfaces while preserving access to full 4-Mbit capacity, though byte-enable control is disabled in this configuration.