Infineon Technologies CY14B104L-ZS20XIT

Overview

CY14B104L-ZS20XIT from Cypress Semiconductor is a 4 Mbit (512K × 8) nonvolatile SRAM with QuantumTrap® technology, operating at 3V ±10%, 20 ns access time, and supporting automatic STORE on power loss via VCAP capacitor. It functions as a drop-in SRAM replacement in systems requiring persistent data retention without battery backup-used in industrial PLCs, medical data loggers, and telecom control cards.

For engineers reviewing the CY14B104L-ZS20XIT datasheet, CY14B104L-ZS20XIT pinout, CY14B104L-ZS20XIT application, or CY14B104L-ZS20XIT equivalent, key selection criteria include AutoStore timing (tSTORE = 20 ms), HSB-driven hardware store control, VCAP capacitor sizing (0.1 µF), and x8 configuration compatibility with legacy SRAM footprints.

Technical Context

The CY14B104L-ZS20XIT integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL across all 524,288 bytes. Its architecture supports three STORE triggers: software address sequence (six specific CE-reads), HSB pin assertion, or automatic initiation when VCC drops below VSWITCH (~2.7 V).

During STORE, SRAM read/write is inhibited for tSTORE (20 ms max); RECALL restores data in tHRECALL (15 ms max). The device uses internal voltage regulation to drive VCAP and includes built-in write-protection logic that ignores redundant STORE requests unless at least one SRAM write occurs since last STORE/RECALL.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (9 mm × 8 mm, 0.8 mm pitch), RoHS-compliant, commercial temperature range (0°C to +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-3A35I and FM24CL64-G, the CY14B104L-ZS20XIT delivers faster parallel access, integrated power-loss detection, and true SRAM timing transparency-making it optimal for high-reliability, latency-sensitive embedded control where data persistence must be seamless and deterministic.

Availability

CY14B104L-ZS20XIT is available at Aetrix Electronics and suitable for industrial data loggers, telecom control cards, and medical diagnostic devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY14B104L-ZS20XIT 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 infrastructure.

The CY14B nvSRAM product line targets applications needing battery-free nonvolatility with SRAM performance-specifically engineered for deterministic power-loss data capture in mission-critical control systems.

FAQ

What is the minimum VCAP capacitor value required for reliable AutoStore operation?

The CY14B104L-ZS20XIT requires a 0.1 µF ceramic capacitor on the VCAP pin, rated for ≥10 V, placed within 5 mm of the package. This value ensures sufficient charge to complete the 20 ms STORE cycle even under worst-case VCC droop profiles defined in the DC Electrical Characteristics table (VCC = 2.7 V min, tDROP = 100 µs).

Can the HSB pin be left unconnected if hardware STORE is not used?

Yes - the HSB pin has an internal weak pull-up and may be left floating if unused. However, if the system requires STORE status monitoring or external hardware-initiated STORE, it must be connected to an open-drain driver with appropriate pull-up (typically 4.7 kΩ to VCC) and debounced input logic.

Does the software STORE sequence affect normal SRAM operation during execution?

Yes - once the sixth address (0x8FC0) is read, the device immediately disables all SRAM access for the duration of tSTORE (max 20 ms). No reads or writes are possible until HSB returns HIGH, ensuring atomic nonvolatile update without partial-write corruption.

Is the CY14B104L-ZS20XIT compatible with standard SRAM controllers without modification?

Yes - it uses identical CE/OE/WE timing and x8 bus interface. However, firmware must avoid address 0x4E38–0x8FC0 in normal operation to prevent accidental STORE/RECALL activation, and VCAP capacitor placement must comply with layout guidelines in the datasheet Figure 4.