Infineon Technologies CY14B104NA-ZSP25XIT

Overview

CY14B104NA-ZSP25XIT from Cypress Semiconductor is a 4-Mbit non-volatile SRAM (nvSRAM) with 256K × 16 organization, QuantumTrap non-volatile storage, 25 ns access time, single 3 V (+20% / –10%) supply, 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-initiated STORE/RECALL cycles for mission-critical data retention in embedded control systems.

For engineers reviewing the CY14B104NA-ZSP25XIT datasheet, CY14B104NA-ZSP25XIT pinout, CY14B104NA-ZSP25XIT application, or CY14B104NA-ZSP25XIT equivalent, key selection considerations include ×16 bus interface compatibility, HSB-controlled hardware STORE timing, VCAP capacitance requirements (0.1 µF), AutoStore enable/disable behavior, and BHE/BLE byte-enable functionality in 16-bit mode.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap non-volatile cells per bit, enabling simultaneous STORE/RECALL across all 256K words without sequential addressing. The architecture decouples volatile read/write (infinite cycles) from non-volatile STORE (1 million cycles) and RECALL (infinite cycles), with dedicated control logic for AutoStore, hardware STORE via HSB, and software STORE via address sequence.

Operation requires precise voltage monitoring: when VCC drops below VSWITCH, internal circuitry disconnects VCAP and initiates STORE using stored charge. The HSB pin serves dual roles - as input to trigger hardware STORE and as open-drain output indicating STORE busy status - with internal 100 kΩ pull-up and tHHHD high-pulse timing after each STORE completion.

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 non-volatile SRAM applications.

Compared with STK14C88-3AJ5F and FM24V10-G, CY14B104NA-ZSP25XIT uniquely combines deterministic AutoStore timing, HSB-based hardware STORE coordination, and 25 ns SRAM speed-making it optimal for systems requiring fast, autonomous, and electrically verified STORE on power failure.

Availability

CY14B104NA-ZSP25XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and avionics flight recorder buffers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY14B104NA-ZSP25XIT 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.

CY14B104NA belongs to the QuantumTrap nvSRAM product line, engineered specifically for applications demanding instantaneous non-volatile storage without batteries, capacitors, or external controllers.

FAQ

What is the minimum VCAP capacitor value required for reliable AutoStore operation?

The CY14B104NA-ZSP25XIT requires a minimum 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 industrial temperature and voltage conditions. Using a smaller capacitor risks incomplete STORE and data corruption.

Can the HSB pin be left unconnected if hardware STORE is not used?

No. The HSB pin must be externally pulled HIGH (e.g., via 10 kΩ resistor to VCC) if not actively driven, because an unconnected HSB may float LOW and falsely trigger STORE. The datasheet explicitly states that HSB has an internal 100 kΩ weak pull-up, but this is insufficient to override noise or leakage in system-level layouts; external pull-up ensures deterministic inactive state.

Does the CY14B104NA-ZSP25XIT support both ×8 and ×16 configurations?

No. CY14B104NA is fixed at 256K × 16 organization (4-Mbit), while CY14B104LA is the ×8 variant (512K × 8). Pinout, address width (A0–A17), and data bus width (DQ0–DQ15 with BHE/BLE) are hardwired for ×16 operation. Attempting ×8 interface will result in incorrect addressing and data misalignment.

How does the conditional STORE feature improve system reliability?

The conditional STORE feature prevents unnecessary non-volatile writes by ignoring AutoStore and hardware STORE unless at least one SRAM write has occurred since the last STORE or RECALL. This extends the 1 million STORE cycle endurance limit by eliminating spurious triggers during idle periods or initialization sequences, directly increasing usable product lifetime in high-availability systems.