Infineon Technologies CY14B108L-ZS25XIT

Overview

CY14B108L-ZS25XIT from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 1024 K × 8, 25 ns access time, single 3 V (+20% / –10%) supply, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using a VCAP capacitor and supports software/hardware-controlled STORE/RECALL for data retention in mission-critical logging and control systems.

For engineers reviewing the CY14B108L-ZS25XIT datasheet, CY14B108L-ZS25XIT pinout, CY14B108L-ZS25XIT application, or CY14B108L-ZS25XIT equivalent, key selection criteria include AutoStore timing behavior, HSB pin handshake logic, VCAP capacitance requirement (0.1 µF), ×8 vs ×16 configuration compatibility, and errata regarding AutoStore Disable functionality.

Technical Context

This nvSRAM integrates standard SRAM cells with parallel-connected QuantumTrap nonvolatile elements per cell. Data transfer between SRAM and nonvolatile storage occurs in full-array parallel mode-enabling sub-millisecond STORE/RECALL latency without block addressing or page management.

The device implements three STORE initiation methods: AutoStore (triggered by VCC drop below VSWITCH ≈ 2.7 V), Hardware STORE (via external pull-down of HSB), and Software STORE (via address-based command sequence). RECALL occurs automatically on power-up or via software command, with infinite RECALL cycles but only 1 million STORE cycles guaranteed.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), RoHS-compliant, surface-mountable with 0.8 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B108L-ZS25XIT, the CY14B108L-ZS20XI offers faster timing at same density and interface, while the FM24V10-G trades density and STORE control for infinite write endurance and simpler power design - making each suitable for distinct reliability vs. performance trade-offs.

Availability

CY14B108L-ZS25XIT is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, telecom base stations, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for CY14B108L-ZS25XIT 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.

CY14B108L belongs to the QuantumTrap nvSRAM product line, engineered specifically for systems needing battery-free, deterministic nonvolatile storage with SRAM speed and interface simplicity.

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 stores energy used exclusively for AutoStore during power loss. The internal regulator charges VCAP to VCC during normal operation. If omitted, AutoStore fails and may corrupt data; the device requires disabling AutoStore via software sequence if VCAP is unpopulated.

Does CY14B108L-ZS25XIT support ×16 data bus configuration?

No - CY14B108L is strictly ×8 (1024 K × 8). The ×16 variant is CY14B108N. Pinout, address mapping (A0–A19 vs. A0–A18), and data bus width (DQ0–DQ7 only) are fixed for this part number; attempting ×16 operation results in undefined behavior and partial addressing.

How does the HSB pin behave during STORE and RECALL operations?

HSB is an open-drain output driven LOW by the device during any STORE or RECALL cycle, including AutoStore, Hardware STORE, and software-initiated operations. After completion, it is actively driven HIGH for tHHHD (≤100 ns), then held HIGH by a 100 kΩ internal pull-up. External pull-up is optional but recommended for noise immunity.

Is the AutoStore Disable feature functional in this revision?

No - per Errata on page 24 of datasheet 001-45523 Rev. *P, the AutoStore Disable feature does not operate correctly. Systems requiring conditional AutoStore suppression must instead use hardware control (HSB pin gating) or rely on the built-in write-latch condition that inhibits AutoStore unless a write has occurred since last STORE/RECALL.