Infineon Technologies CY14B104N-ZS20XC

Overview

CY14B104N-ZS20XC from Cypress Semiconductor is a 4 Mbit nonvolatile SRAM (nvSRAM) with 256K × 16 organization, 20 ns access time, single 3V (+20% to –10%) supply, and QuantumTrap® nonvolatile storage. It performs automatic STORE on power loss using VCAP capacitor support and supports software- or hardware-initiated STORE/RECALL. Used in industrial control systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B104N-ZS20XC datasheet, CY14B104N-ZS20XC pinout, CY14B104N-ZS20XC application, or CY14B104N-ZS20XC equivalent, key selection criteria include x16 bus interface compatibility, HSB-driven hardware store timing, VCAP capacitance requirements, and 200,000 STORE cycle endurance under industrial temperature operation.

Technical Context

The CY14B104N-ZS20XC integrates standard SRAM cells with parallel QuantumTrap nonvolatile elements per cell, enabling true nonvolatility without external batteries. Its dual-mode operation-SRAM read/write interleaved with STORE/RECALL-is governed by CE/OE/WE/BHE/BLE control logic and validated address sequences.

STORE operations are conditionally triggered: AutoStore activates when VCC drops below VSWITCH and VCAP sustains internal charge; Hardware STORE initiates on HSB pin assertion only after at least one prior write; Software STORE requires six exact CE-controlled reads to dedicated addresses. RECALL occurs automatically at power-up or via software sequence, restoring full 256K×16 data in tHRECALL ≤ 20 ms.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (10 mm × 10 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS4C4M16SA-6TCN and FM24V10-G, the CY14B104N-ZS20XC uniquely delivers autonomous, capacitor-backed STORE on power failure with full 4 Mbit x16 interface and industrial temperature support - eliminating external supervision circuitry and firmware complexity.

Availability

CY14B104N-ZS20XC is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, avionics black boxes, and railway signaling controllers requiring stable component supply with guaranteed long-term availability.

Supply support for CY14B104N-ZS20XC 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 series targets mission-critical applications needing battery-free nonvolatility, combining SRAM speed with quantum-mechanical charge trapping - optimized for systems where data loss during power interruption is unacceptable.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14B104N-ZS20XC requires a 0.1 µF X7R ceramic capacitor on the VCAP pin, placed within 3 mm of the device. This value ensures sufficient stored energy to complete one full STORE cycle during VCC dropout events lasting up to 10 µs, as verified in Cypress's DC Electrical Characteristics table (Rev. *L, p.7).

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 hardware STORE initiation and busy monitoring are not required. However, it must never be tied HIGH externally, as that would prevent AutoStore or software STORE from asserting HSB LOW during operation.

Does the CY14B104N-ZS20XC support byte-write masking in x16 mode?

Yes - BHE and BLE pins enable independent control of upper (DQ8–DQ15) and lower (DQ0–DQ7) bytes during writes. When BHE=LOW and BLE=HIGH, only DQ0–DQ7 are written; both LOW enables full 16-bit write. This matches standard x16 SRAM byte-enable behavior.

How does the conditional STORE feature improve device longevity?

The CY14B104N-ZS20XC skips AutoStore and Hardware STORE unless at least one SRAM write occurred since the last STORE or RECALL. This prevents unnecessary nonvolatile element cycling during idle periods, extending usable life toward the rated 200,000 STORE cycles even in systems with frequent power cycling but infrequent data changes.