Infineon Technologies CY14B104N-ZS25XIT

Overview

CY14B104N-ZS25XIT from Cypress Semiconductor is a 4 Mbit nonvolatile SRAM (nvSRAM) organized as 256K × 16, featuring QuantumTrap® nonvolatile storage, 25 ns access time, single 3V (+20% to –10%) supply operation, and AutoStore® on power loss using an external VCAP capacitor. It serves as drop-in SRAM replacement in industrial control modules requiring persistent data retention without battery backup.

For engineers reviewing the CY14B104N-ZS25XIT datasheet, CY14B104N-ZS25XIT pinout, CY14B104N-ZS25XIT application, or CY14B104N-ZS25XIT equivalent, key selection criteria include x16 bus interface support, HSB-driven hardware store control, software-initiated STORE/RECALL sequences, and 200,000 STORE cycle endurance with 20-year data retention.

Technical Context

This nvSRAM integrates standard SRAM cells with embedded QuantumTrap nonvolatile elements per cell, enabling parallel STORE/RECALL across all memory locations. It supports three STORE initiation methods: automatic (on VCC drop below VSWITCH), hardware (via HSB pin assertion), and software (six-address sequence).

RECALL occurs automatically at power-up or via software command; both operations inhibit SRAM read/write until completion. The device uses BHE/ BLE byte enables for x16 mode, requires no external power source for nonvolatile write, and maintains full SRAM timing compatibility during active operation.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (6 mm × 8 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 STK14CA8-3LF35I and FM24V04-G, CY14B104N-ZS25XIT uniquely balances deterministic hardware/software STORE control, 25 ns SRAM speed, and field-proven QuantumTrap reliability - making it optimal for industrial systems requiring both performance and guaranteed power-loss data capture.

Availability

CY14B104N-ZS25XIT is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, avionics data recorders, and smart grid RTUs requiring stable component supply with long-term lifecycle assurance.

Supply support for CY14B104N-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.

CY14B104N belongs to the QuantumTrap nvSRAM product line, engineered specifically for mission-critical applications where battery-free, fast, and guaranteed nonvolatile data retention is mandatory during power interruption.

FAQ

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

The VCAP pin connects to an external storage capacitor that supplies energy for the AutoStore operation during VCC dropout. Per datasheet specification 001-07102 Rev. *L, a 0.1 µF ceramic capacitor rated for ≥10 V is required. This capacitor must be placed within 5 mm of the VCAP pin with low-inductance routing to ensure reliable STORE execution under fast power-fail conditions.

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

HSB is an open-drain output that is actively driven LOW during any STORE or RECALL operation - whether initiated by power loss, hardware request, or software sequence. It remains LOW for the full duration of the operation (tSTORE or tRECALL), then releases to HIGH only after completion. When unused, HSB may be left floating due to its internal weak pull-up.

Can CY14B104N-ZS25XIT be used in x8 mode, or is it strictly x16?

CY14B104N is specifically configured as 256K × 16 (x16) and is not pin-compatible with x8 operation. Its address range is A0–A17 (18 pins), and DQ lines are DQ0–DQ15. The CY14B104L variant supports x8 (512K × 8); mixing configurations requires board redesign and different pinout mapping.

What happens if a software STORE sequence is interrupted mid-execution?

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 with no STORE executed. The device resumes normal SRAM operation immediately, and HSB remains HIGH - no error flag or status register indicates the abort.