Infineon Technologies CY14B108N-BA25XIT

Overview

CY14B108N-BA25XIT from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) with 512 K × 16 organization, single 3 V (+20% / –10%) supply operation, 25 ns access time, 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. It is used in industrial control systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B108N-BA25XIT datasheet, CY14B108N-BA25XIT pinout, CY14B108N-BA25XIT application, or CY14B108N-BA25XIT equivalent, key selection criteria include ×16 bus interface support, HSB-controlled hardware STORE timing, VCAP-based AutoStore reliability, and industrial temperature range compliance (–40°C to +85°C).

Technical Context

The CY14B108N-BA25XIT integrates standard SRAM and QuantumTrap nonvolatile elements in each cell, enabling parallel STORE/RECALL across all 524,288 words. Its architecture inhibits SRAM access during STORE/RECALL cycles and uses internal voltage switching at VSWITCH (~2.5 V) to trigger AutoStore when VCC drops.

It supports three STORE initiation methods: AutoStore (capacitor-powered), Hardware STORE (HSB pin assertion), and Software STORE (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 STK14C88-3AJ and FM24V10-G, the CY14B108N-BA25XIT uniquely combines high density, capacitor-based maintenance-free AutoStore, HSB-driven hardware control, and guaranteed 20-year retention - making it optimal for industrial systems demanding robust, deterministic nonvolatile storage without batteries or external supervision.

Availability

CY14B108N-BA25XIT is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion devices, telecom timing modules, and automotive ADAS calibration systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY14B108N-BA25XIT 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 CY14B nvSRAM product line targets applications needing battery-free, high-endurance nonvolatile storage with SRAM-speed access - specifically engineered for fail-safe data retention in mission-critical embedded systems.

FAQ

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

The VCAP pin connects to a 0.1 µF ceramic capacitor that supplies regulated energy for AutoStore during VCC dropout. This capacitor charges from VCC during normal operation and discharges to power the STORE operation when VCC falls below VSWITCH (~2.5 V). Using the specified value ensures full STORE completion within tSTORE (max 20 ms) and prevents data corruption due to insufficient charge.

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

HSB is an open-drain pin internally driven LOW during active STORE or RECALL operations, signaling busy status to the host system. After completion, it is actively driven HIGH for tHHHD (≤100 ns), then held HIGH by a 100 kΩ internal pull-up. Externally pulling HSB LOW initiates a hardware STORE, but only if at least one SRAM write has occurred since the last STORE/RECALL cycle.

Can CY14B108N-BA25XIT be used in ×8 mode, or is it strictly ×16?

The CY14B108N variant is specifically configured for 512 K × 16 organization and uses A0–A18 and DQ0–DQ15. It cannot operate in ×8 mode - that functionality is implemented in the CY14B108L variant (1024 K × 8, A0–A19, DQ0–DQ7). Pinouts, address mapping, and byte-enable logic are physically and electrically distinct between the two part numbers.

Is AutoStore disabled by default, and how is it controlled?

AutoStore is enabled by default and cannot be permanently disabled in hardware. However, it can be temporarily suppressed using a software sequence documented in the datasheet (page 8, "Preventing AutoStore"). This sequence clears the internal write latch, causing subsequent power-drop events to skip AutoStore - useful during development or debugging. The errata confirms the AutoStore Disable feature does not function in silicon.