Infineon Technologies CY14B104NA-ZSP45XI

Overview

CY14B104NA-ZSP45XI 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, industrial temperature range (–40°C to +85°C), and QuantumTrap non-volatile storage technology. It performs automatic STORE on power-down using an external VCAP capacitor and supports software- or hardware-triggered STORE/RECALL operations in systems requiring persistent memory without battery backup - such as industrial PLCs, medical data loggers, and telecom control cards.

For engineers reviewing the CY14B104NA-ZSP45XI datasheet, CY14B104NA-ZSP45XI pinout, CY14B104NA-ZSP45XI application, or CY14B104NA-ZSP45XI equivalent, key selection criteria include ×16 bus interface support, HSB-controlled hardware STORE timing, VCAP-based AutoStore reliability, and compatibility with legacy SRAM controllers requiring no firmware changes for non-volatility.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap non-volatile cells per bit, enabling simultaneous STORE/RECALL across all 256K words. It uses internal voltage regulation to charge VCAP and triggers AutoStore when VCC drops below VSWITCH (~2.7 V), ensuring deterministic data retention during brownout.

Hardware STORE is initiated by driving HSB low, with built-in write-latch validation and tDELAY synchronization to complete pending writes. Software STORE uses a specific address sequence, while RECALL occurs automatically at power-up or via command - all operations inhibit SRAM access until completion.

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 non-volatile SRAM applications.

Compared with STK14C88-45I and FM24V10-G, CY14B104NA-ZSP45XI uniquely delivers ×16 interface, integrated HSB signaling, and capacitor-driven AutoStore - making it optimal for industrial systems where power integrity is unpredictable and bus width demands efficiency.

Availability

CY14B104NA-ZSP45XI is available at Aetrix Electronics and suitable for industrial control logging, medical device parameter storage, telecom base station control, and avionics configuration memory requiring stable component supply and long-term obsolescence planning.

Supply support for CY14B104NA-ZSP45XI 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 to replace battery-backed SRAM in mission-critical systems where maintenance-free, long-life non-volatility is mandatory.

FAQ

What is the function of the VCAP pin?

The VCAP pin connects to a 0.1 µF ceramic capacitor that stores energy used exclusively for the AutoStore operation during VCC dropout. An internal regulator charges VCAP during normal operation; when VCC falls below VSWITCH (~2.7 V), the device isolates VCAP and uses its stored charge to complete a full STORE cycle - preserving all 256K words without external intervention.

Does CY14B104NA-ZSP45XI require firmware changes to enable non-volatility?

No firmware changes are required for AutoStore operation - it activates automatically on power loss. Software STORE/RECALL commands use standard SRAM address/data transactions and do not require new drivers or HAL layers. Existing SRAM read/write code remains fully functional; only STORE/RECALL sequences need optional integration for controlled non-volatile updates.

How does the HSB pin behave during STORE operations?

HSB is an open-drain pin with internal 100 kΩ pull-up. It is driven LOW by the device during any active STORE (AutoStore, Hardware, or Software) to signal busy status. Externally pulling HSB LOW initiates a hardware STORE, but only if a write has occurred since the last STORE/RECALL. After completion, HSB is actively driven HIGH for tHHHD (≤100 ns), then held HIGH by the weak pull-up.

Can CY14B104NA-ZSP45XI be used in place of a standard 256K × 16 SRAM?

Yes - it is pin-compatible and timing-compatible with standard 45 ns SRAMs in FBGA-48 package. All control signals (CE, WE, OE, BHE, BLE), address (A0–A17), and data (DQ0–DQ15) match industry-standard ×16 SRAM interfaces. No layout or timing adjustments are needed; non-volatility is added transparently via VCAP and optional HSB monitoring.