Infineon Technologies CY14B104NA-BA20XIT

Overview

CY14B104NA-BA20XIT from Cypress Semiconductor is a 4-Mbit non-volatile SRAM (nvSRAM) with 256K × 16 organization, single 3 V (+20%, –10%) supply, 20 ns access time, and QuantumTrap non-volatile storage. It performs automatic STORE on power-down using an external VCAP capacitor and supports software/hardware-initiated STORE/RECALL. Used in industrial control systems requiring persistent memory without battery backup.

For engineers reviewing the CY14B104NA-BA20XIT datasheet, CY14B104NA-BA20XIT pinout, CY14B104NA-BA20XIT application, or CY14B104NA-BA20XIT equivalent, key selection criteria include ×16 bus interface support, HSB-controlled hardware STORE timing, VCAP-based AutoStore reliability, and industrial temperature operation without external power management circuitry.

Technical Context

This nvSRAM integrates standard SRAM cells with parallel QuantumTrap non-volatile elements per cell, enabling simultaneous STORE/RECALL across all 256K words. The architecture decouples volatile read/write performance (20 ns tAA) from non-volatile endurance (1 million STORE cycles, 20-year retention).

STORE operations are triggered by power loss (via VCAP discharge below VSWITCH), HSB pin assertion, or software address sequence; RECALL occurs automatically at power-up or via software command. Control logic inhibits SRAM access during STORE/RECALL, and write-latch tracking prevents spurious AutoStore cycles unless writes occur since last non-volatile operation.

Key Specifications

Pinout & Package

Package: 48-ball fine-pitch ball grid array (FBGA), RoHS-compliant, industrial-grade thermal profile.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar non-volatile SRAM applications.

Compared with FM24V10-G and MB85RS4MT-Y, CY14B104NA-BA20XIT provides the fastest access (20 ns), explicit HSB-driven STORE control, and proven 20-year retention - making it optimal for industrial systems demanding both speed and guaranteed power-loss response.

Availability

CY14B104NA-BA20XIT is available at Aetrix Electronics and suitable for industrial PLCs, medical instrumentation, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY14B104NA-BA20XIT 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.

CY14B104NA belongs to the QuantumTrap nvSRAM product line, engineered specifically for applications needing battery-free, fast-access non-volatility with deterministic power-loss response in harsh environments.

FAQ

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

The VCAP pin supplies regulated power to execute the AutoStore operation during VCC dropout. A 0.1 µF ceramic capacitor must be placed between VCAP and VSS. This capacitor is charged during normal operation and discharges to complete one STORE cycle when VCC falls below VSWITCH. Using a smaller capacitor risks incomplete STORE and data corruption; larger values do not improve reliability and may delay power-up RECALL.

How does the HSB pin function during STORE operations?

HSB is an open-drain pin that goes LOW during any active STORE (AutoStore, Hardware, or Software). When driven LOW externally, it initiates a conditional STORE after tDELAY - only if a write has occurred since the last STORE/RECALL. After completion, HSB is actively driven HIGH for tHHHD, then held HIGH by an internal 100 kΩ pull-up. Systems monitor HSB to avoid issuing new commands during STORE execution.

Can CY14B104NA-BA20XIT operate in ×8 mode?

No. CY14B104NA is factory-configured for 256K × 16 organization only. The CY14B104LA variant supports 512K × 8. Pinouts, address range (A0–A17), and data bus width (DQ0–DQ15) are fixed for ×16 operation. Attempting ×8 use would result in incorrect addressing and data misalignment due to hardwired internal decoding.

What happens if AutoStore is enabled but no VCAP capacitor is installed?

If AutoStore is enabled (default state) and no VCAP capacitor is connected, the device attempts STORE on power loss but lacks energy to complete it. This causes partial programming of QuantumTrap cells, resulting in corrupted data upon subsequent RECALL. The datasheet mandates disabling AutoStore via software sequence if VCAP is omitted - otherwise, reliable non-volatile operation cannot be guaranteed.