Infineon Technologies CY14B104N-ZS45XC

Overview

CY14B104N-ZS45XC from Cypress Semiconductor is a 4 Mbit nonvolatile SRAM (nvSRAM) organized as 256K × 16, featuring QuantumTrap® nonvolatile storage, 45 ns access time, single 3V ±10% supply, and AutoStore® on power loss. It serves as drop-in SRAM replacement with persistent data retention in industrial control, metering, and medical data logging systems where power interruption risk exists.

For engineers reviewing the CY14B104N-ZS45XC datasheet, CY14B104N-ZS45XC pinout, CY14B104N-ZS45XC application, or CY14B104N-ZS45XC equivalent, key selection criteria include x16 bus width support, HSB-controlled hardware store timing, VCAP capacitor sizing for reliable AutoStore, and software STORE/RECALL address sequence compliance.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous infinite SRAM read/write cycles and up to 200,000 STORE cycles. STORE operations occur via AutoStore (power-down triggered), hardware (HSB pin assertion), or software (6-address sequence); RECALL occurs automatically at power-up or via software sequence.

The device supports x16 configuration with BHE/ BLE byte enables, uses A0–A17 for addressing, and requires VCAP ≥ 4.7 µF (per datasheet p.7) charged from VCC to sustain STORE during VCC collapse below VSWITCH (2.2 V typ). HSB operates as open-drain status indicator and store trigger with tDELAY = 100 ns min before initiation.

Key Specifications

Pinout & Package

Package: 48-ball FBGA (9 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 STK14C88-45I and FM24V04-G, CY14B104N-ZS45XC uniquely combines VCAP-based hands-off AutoStore, HSB-driven hardware control, and 200K STORE endurance-making it optimal for unattended industrial systems lacking battery infrastructure or precise shutdown signaling.

Availability

CY14B104N-ZS45XC is available at Aetrix Electronics and suitable for industrial PLC data buffering, smart electricity meter log storage, and medical infusion pump event logging requiring stable component supply and long-lifecycle assurance.

Supply support for CY14B104N-ZS45XC 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 IoT applications.

CY14B104N-ZS45XC belongs to the QuantumTrap nvSRAM product line, engineered specifically to replace battery-backed SRAM in mission-critical systems demanding maintenance-free, long-term nonvolatile data retention.

FAQ

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

The CY14B104N-ZS45XC requires a minimum 4.7 µF tantalum capacitor on the VCAP pin, rated for ≥6.3 V, with ESR ≤ 1 Ω. This value ensures sufficient stored energy to complete the STORE operation when VCC drops below VSWITCH (2.2 V). Derating to 10 µF is recommended for extended temperature or aging margin.

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

Yes, HSB may be left floating because it features an internal weak pull-up that holds it HIGH when unused. Leaving it unconnected disables hardware STORE initiation and allows HSB to function solely as a status indicator during AutoStore or software STORE. No external pull-up is required unless active-low driving is needed.

How does the software STORE sequence prevent accidental activation?

The six-address sequence (0x4E38 → 0xB1C7 → 0x83E0 → 0x7C1F → 0x703F → 0x8FC0) must be executed as consecutive CE-controlled reads with WE held HIGH. Any intervening write, address violation, or timing violation (e.g., exceeding tSS = 100 µs between reads) aborts the sequence. This prevents spurious STORE from noise or partial resets.

Is the CY14B104N-ZS45XC pin-compatible with the CY14B104L variant?

No - CY14B104N (x16) and CY14B104L (x8) differ in address/data pin mapping: N uses A0–A17 and DQ0–DQ15 with BHE/ BLE; L uses A0–A18 and DQ0–DQ7. The 48-ball FBGA packages share footprint but require PCB redesign for x16 vs. x8 bus routing and byte-enable logic.