Infineon Technologies CY14B108N-ZSP45XI

Overview

CY14B108N-ZSP45XI from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) organized as 512 K × 16, operating at 45 ns access time, 3.0 V ±10% supply, and industrial temperature range (–40°C to +85°C). It integrates QuantumTrap nonvolatile storage per cell, enabling automatic STORE on power-down via VCAP capacitor and software- or hardware-triggered STORE/RECALL. It is used in industrial PLCs for real-time data retention during unexpected power loss.

For engineers reviewing the CY14B108N-ZSP45XI datasheet, CY14B108N-ZSP45XI pinout, CY14B108N-ZSP45XI application, or CY14B108N-ZSP45XI equivalent, key selection considerations include ×16 bus interface support, HSB-controlled hardware STORE timing, AutoStore dependency on VCAP capacitance, and BHE/BLE byte enable functionality for 16-bit word access.

Technical Context

The CY14B108N-ZSP45XI implements a dual-cell architecture: standard SRAM array (512 K × 16) paired with parallel QuantumTrap nonvolatile elements. STORE and RECALL occur atomically across all cells, with SRAM access inhibited during both operations.

AutoStore initiates when VCC drops below VSWITCH (2.7 V), using charge stored on the external VCAP capacitor (0.1 µF typical); hardware STORE is triggered by driving HSB low, while software STORE uses a specific address sequence. The device supports infinite SRAM read/write cycles but limits STORE endurance to 1 million cycles.

Key Specifications

Pinout & Package

Package: 48-ball fine-pitch ball grid array (FBGA), RoHS-compliant, 8 mm × 6 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, the CY14B108N-ZSP45XI uniquely combines ×16 bus support, hardware STORE via HSB, and capacitor-based AutoStore-enabling compact, maintenance-free designs where precise STORE timing and 16-bit efficiency are critical.

Availability

CY14B108N-ZSP45XI is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, avionics black boxes, and smart grid RTUs requiring stable component supply with guaranteed long-term availability.

Supply support for CY14B108N-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) is a fabless semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer applications.

The CY14B nvSRAM product line was designed specifically for systems demanding instant-on nonvolatility, deterministic STORE timing, and elimination of batteries or external NVM controllers in mission-critical embedded applications.

FAQ

What is the function of the VCAP pin, and what capacitor value is required?

The VCAP pin connects to an external 0.1 µF ceramic capacitor that supplies energy for AutoStore during power loss. This capacitor is charged to VCC by an internal regulator. Without it, AutoStore fails and may corrupt data. The capacitor must be placed within 5 mm of the VCAP pin with low-inductance routing to ensure reliable 45 ns STORE completion.

Can CY14B108N-ZSP45XI operate in ×8 mode, or is it strictly ×16?

CY14B108N is exclusively configured as 512 K × 16; the "N" suffix denotes the ×16 organization. The ×8 variant is CY14B108L. Pinout, address mapping (A0–A18), and data bus (DQ0–DQ15) are fixed for 16-bit operation - BHE and BLE pins are mandatory for byte-select control and cannot be omitted.

How does the HSB pin behave during and after a STORE operation?

HSB is an open-drain I/O pin driven LOW by the device during any STORE or RECALL cycle. When used as input, pulling HSB LOW externally initiates hardware STORE after tDELAY. After STORE completion, HSB is actively driven HIGH for tHHHD (≤100 ns), then held HIGH by a 100 kΩ internal weak pull-up. It must be monitored to avoid initiating new writes during busy periods.

Is the CY14B108N-ZSP45XI pin-compatible with earlier CY14B108N variants?

Yes - the ZSP45XI suffix indicates 45 ns speed grade in FBGA package with industrial temperature range. All CY14B108N variants share identical 48-ball FBGA pinout, ×16 organization, and functional pin definitions. Migration from ZS25XI or ZS35XI requires only timing validation; no PCB or firmware changes are needed for same-speed replacements.