Infineon Technologies CY14B104N-ZS45XI

Overview

CY14B104N-ZS45XI from Cypress Semiconductor is a 4 Mbit nonvolatile SRAM (nvSRAM) with 256K × 16 organization, 45 ns access time, single 3V (+20% to –10%) supply, and QuantumTrap® nonvolatile storage. It performs automatic STORE on power loss using VCAP capacitor support and supports software- or hardware-initiated STORE/RECALL. Used in industrial controllers requiring persistent memory without battery backup.

For engineers reviewing the CY14B104N-ZS45XI datasheet, CY14B104N-ZS45XI pinout, CY14B104N-ZS45XI application, or CY14B104N-ZS45XI equivalent, key selection criteria include x16 bus interface compatibility, AutoStore timing under voltage droop, HSB-driven hardware store control, and 200,000 STORE cycle endurance with 20-year data retention.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous STORE/RECALL across all 256K words. The architecture decouples volatile read/write (infinite cycles) from nonvolatile STORE (200K max), with RECALL always restoring full contents on power-up.

STORE is triggered by power failure (via VCAP discharge below VSWITCH), HSB pin assertion, or six-address software sequence; RECALL occurs automatically at power-up or via identical six-address sequence. BHE/ BLE byte enables and HSB open-drain signaling are essential for system-level coordination of nonvolatile operations.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (9 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-45I and FM24V10-G, CY14B104N-ZS45XI delivers superior data retention (20 vs. 10 years), higher STORE endurance (200K vs. 100K cycles), and native x16 parallel interface with integrated HSB signaling - reducing BOM count and firmware complexity in industrial MPU designs.

Availability

CY14B104N-ZS45XI is available at Aetrix Electronics and suitable for industrial automation, medical device manufacturing, and telecom infrastructure projects requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY14B104N-ZS45XI 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.

CY14B104N belongs to the QuantumTrap nvSRAM product line, engineered specifically for applications demanding battery-free nonvolatility, deterministic power-loss recovery, and seamless integration with 16-bit microprocessors.

FAQ

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

The CY14B104N-ZS45XI requires a 0.1 µF X7R ceramic capacitor on the VCAP pin to ensure successful STORE completion during VCC dropout. This value is validated for 45 ns access time grade and supports ≥1.5 ms hold-up time under worst-case load and temperature conditions. Larger values do not improve reliability and may increase power-up delay.

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

Yes - the HSB pin has an internal weak pull-up and may be left floating if unused. When disconnected, it remains HIGH during normal operation and does not affect SRAM functionality. However, leaving it unconnected forfeits real-time STORE progress indication and external hardware-triggered STORE capability.

Does software RECALL erase the nonvolatile memory contents?

No - software RECALL only transfers data from QuantumTrap cells into SRAM; it leaves the nonvolatile contents unchanged. This allows repeated RECALL without degrading STORE endurance. In contrast, software STORE performs an erase-then-program sequence on the nonvolatile array, consuming one of the 200,000 rated cycles.

Is the CY14B104N-ZS45XI compatible with 3.3V-only systems?

Yes - the device operates from 3.0 V ±10% (2.7 V to 3.6 V), making it fully compatible with standard 3.3V power rails. It does not require level-shifting for 3.3V I/O interfaces, and all control and data pins are 3.3V-tolerant. No external voltage translation is needed for MPU or FPGA connections.