Infineon Technologies CY14B108N-BA25XI

Overview

CY14B108N-BA25XI from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) organized as 512 K × 16, operating at 25 ns access time with single 3 V (+20%, –10%) supply, industrial temperature range (–40°C to +85°C), and QuantumTrap nonvolatile storage technology. It performs automatic STORE on power-down using a VCAP capacitor, supports software/hardware-initiated STORE/RECALL, and delivers 20-year data retention with 1 million STORE cycles.

For engineers reviewing the CY14B108N-BA25XI datasheet, CY14B108N-BA25XI pinout, CY14B108N-BA25XI application, or CY14B108N-BA25XI equivalent, key selection criteria include ×16 bus interface compatibility, HSB-controlled hardware STORE timing, VCAP capacitor sizing (0.1 µF), AutoStore enable/disable behavior, and BHE/BLE byte-enable support for 16-bit systems.

Technical Context

The CY14B108N implements dual-function memory cells combining standard SRAM arrays with embedded QuantumTrap nonvolatile elements. All 524,288 words are stored and recalled in parallel, with STORE/RECALL operations inhibiting SRAM access during execution.

It supports three STORE initiation methods: AutoStore triggered by VCC drop below VSWITCH (with VCAP backup), Hardware STORE via external pull-down of HSB, and Software STORE via address sequence. RECALL occurs automatically on power-up or via software command, with HSB signaling busy status during both operations.

Key Specifications

Pinout & Package

Package: 48-ball fine-pitch ball grid array (FBGA), RoHS-compliant, industrial-grade thermal profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM28V205A-25-TG and MB85RS64VPF-G-JNERE1, the CY14B108N-BA25XI uniquely combines high-density parallel ×16 interface, capacitor-backed AutoStore, and industrial temperature qualification-making it optimal for real-time systems requiring bulk nonvolatile state capture without host coordination.

Availability

CY14B108N-BA25XI is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device event buffering, and telecom base station configuration requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY14B108N-BA25XI 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.

The CY14B108N belongs to the QuantumTrap nvSRAM product line, engineered specifically to replace battery-backed SRAM and external EEPROM in systems demanding instant nonvolatility, high write endurance, and deterministic power-loss recovery.

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 capacitor that supplies energy for the AutoStore operation during VCC collapse. This capacitor must be placed as close as possible to the VCAP pin with low-ESR characteristics. Without it, AutoStore fails and may corrupt data; the device requires this capacitor to meet its 20-year data retention and 1-million-cycle STORE specifications.

How does the HSB pin operate during STORE and RECALL cycles?

HSB is an open-drain I/O that is driven LOW by the device during any STORE or RECALL operation to signal busy status. It can also be pulled LOW externally to initiate a Hardware STORE. After completion, HSB is actively driven HIGH for tHHHD (≤100 ns), then held HIGH by an internal 100 kΩ pull-up. It remains HIGH during normal SRAM operation unless a STORE/RECALL is active.

Can CY14B108N-BA25XI be used in a ×8 configuration?

No - CY14B108N is strictly a 512 K × 16 device. The "N" suffix denotes the ×16 organization; the ×8 variant is the CY14B108L. Pinouts, address mapping (A0–A18), and data bus width (DQ0–DQ15) are fixed for ×16 operation. BHE and BLE pins are present and functional only in this configuration.

Is AutoStore disable supported, and how is it implemented?

The AutoStore Disable feature is documented but nonfunctional per Errata on page 24 of the datasheet (Rev. *P). There is no reliable software or hardware method to disable AutoStore. Systems requiring conditional STORE must instead use Hardware STORE (via HSB) or Software STORE, and ensure VCAP is sized correctly to avoid corruption during unintended power-loss events.