Infineon Technologies CY14B104N-ZS45XIT

Overview

CY14B104N-ZS45XIT from Cypress Semiconductor is a 4 Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap® technology, organized as 256K × 16 bits, 45 ns access time, single 3V (+20% to –10%) supply, and integrated AutoStore® on power loss. It serves as drop-in SRAM replacement in mission-critical industrial control and data logging systems requiring guaranteed data retention without external backup.

For engineers reviewing the CY14B104N-ZS45XIT datasheet, CY14B104N-ZS45XIT pinout, CY14B104N-ZS45XIT application, or CY14B104N-ZS45XIT equivalent, key selection criteria include x16 bus interface support, hardware STORE/RECALL via HSB pin, VCAP-based autonomous power-loss protection, and 200,000 STORE cycle endurance with 20-year data retention.

Technical Context

The CY14B104N-ZS45XIT integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous infinite SRAM read/write cycles and deterministic STORE/RECALL operations. Its architecture decouples volatile operation from nonvolatile persistence - SRAM functions identically to standard fast static RAM until STORE or RECALL is triggered.

STORE may be initiated by hardware (HSB pin assertion), software (6-address sequence), or automatically at power-down via VCAP-supplied energy. RECALL occurs on power-up or via software command, restoring full 256K × 16 contents to SRAM in ≤15 ms. The device inhibits SRAM access during STORE/RECALL and uses BHE/ BLE for byte-level control in x16 mode.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (9 mm × 9 mm, 0.8 mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-45I and FM24CL04-G, the CY14B104N-ZS45XIT uniquely delivers x16 parallel interface, integrated HSB signaling, and full 4 Mbit density with deterministic STORE/RECALL - making it the only option for industrial SRAM drop-in with autonomous power-loss resilience.

Availability

CY14B104N-ZS45XIT is available at Aetrix Electronics and suitable for industrial PLCs, smart utility meters, railway event loggers, and medical diagnostic equipment requiring stable component supply, long-lifecycle assurance, and guaranteed nonvolatile data integrity.

Supply support for CY14B104N-ZS45XIT 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 markets.

The CY14B104N belongs to Cypress's nvSRAM product line, engineered specifically to replace battery-backed SRAM in harsh-environment applications where maintenance-free, long-term data retention is mandatory.

FAQ

What is the function of the VCAP pin?

The VCAP pin connects to an external 0.1 µF capacitor that stores energy used exclusively for the AutoStore operation during power loss. An internal regulator charges VCAP from VCC during normal operation; when VCC drops below 2.5 V, the device isolates VCAP and uses its stored charge to complete a single STORE cycle to QuantumTrap cells - no external power source or battery required.

How does the HSB pin behave during STORE and RECALL?

HSB is an open-drain output that is actively driven LOW during any STORE or RECALL operation - whether initiated by hardware, software, or AutoStore. It remains LOW until the operation completes, then releases HIGH. When externally pulled LOW, it initiates a conditional STORE only if at least one SRAM write has occurred since the last STORE/RECALL cycle.

Can CY14B104N-ZS45XIT operate in x8 mode?

No - CY14B104N is strictly a 256K × 16 (x16) device. The "N" suffix denotes x16 organization; the "L" variant (CY14B104L) is the x8 version (512K × 8). Pinouts, address mapping (A0–A17), and data bus width (DQ0–DQ15) are fixed for x16 operation and cannot be reconfigured for x8 use.

What happens if the software STORE sequence is interrupted?

If any address in the six-step sequence (0x4E38 → 0xB1C7 → 0x83E0 → 0x7C1F → 0x703F → 0x8FC0) is skipped, misordered, or followed by another access before tSS (soft-sequence processing time) elapses, the sequence aborts silently - no STORE occurs, and SRAM operation resumes immediately. No error flag or status bit indicates the failure.