Infineon Technologies CY14B104LA-BA45XI

Overview

CY14B104LA-BA45XI from Cypress Semiconductor is a 4-Mbit non-volatile SRAM (nvSRAM) with 512K × 8 organization, 45 ns access time, single 3 V (+20%, –10%) supply operation, industrial temperature range (–40°C to +85°C), and QuantumTrap non-volatile storage technology. It performs automatic STORE on power-down using an external VCAP capacitor and supports software- or hardware-initiated STORE/RECALL cycles for data retention in mission-critical embedded systems such as industrial PLCs and telecom line cards.

For engineers reviewing the CY14B104LA-BA45XI datasheet, CY14B104LA-BA45XI pinout, CY14B104LA-BA45XI application, or CY14B104LA-BA45XI equivalent, key selection considerations include AutoStore timing dependency on VCAP capacitance, HSB pin behavior during STORE busy state, ×8 vs ×16 configuration compatibility, and 1 million STORE endurance versus infinite SRAM read/write cycles.

Technical Context

This nvSRAM integrates standard fast SRAM array (2048 × 2048) with parallel QuantumTrap non-volatile cells per bit, enabling simultaneous STORE/RECALL across all memory locations. The architecture decouples volatile operation from non-volatile persistence: SRAM supports unlimited read/write cycles while QuantumTrap provides 20-year data retention and 1 million STORE cycles.

STORE is triggered by three independent mechanisms-AutoStore (VCC drop below VSWITCH), Hardware STORE (HSB pin assertion), or Software STORE (address sequence)-with built-in write-latch validation preventing spurious stores. RECALL occurs automatically at power-up or via software command, and both operations inhibit SRAM access until completion.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), Type II, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14CA8-45I and FM24V04-G, CY14B104LA-BA45XI uniquely combines hands-off AutoStore, HSB-initiated hardware store, and software-controlled persistence-all within a single 44-pin TSOP package-making it optimal for systems requiring zero-host intervention during power failure.

Availability

CY14B104LA-BA45XI is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical diagnostic buffers, and avionics flight recorders requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for CY14B104LA-BA45XI 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.

CY14B104LA belongs to Cypress's QuantumTrap nvSRAM product line, engineered specifically for systems demanding battery-free, instant-on non-volatility with SRAM performance and industrial-grade reliability.

FAQ

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

The CY14B104LA-BA45XI requires a 0.1 µF ceramic capacitor on the VCAP pin to ensure successful AutoStore during VCC collapse. This value is specified in the DC Electrical Characteristics table (page 9 of datasheet 001-49918 Rev. *O) and validated for 45 ns access time operation across the full industrial temperature range. Larger values do not improve functionality and may slow VCAP recharge.

Can CY14B104LA-BA45XI operate in ×16 mode?

No. The CY14B104LA variant is strictly 512K × 8 organized; the ×16 configuration is exclusive to the CY14B104NA part number. Pinouts, address mapping (A0–A18), and data bus width (DQ0–DQ7 only) confirm this. Attempting ×16 operation will result in incorrect addressing and data corruption.

Is the HSB pin mandatory for functional operation?

No. HSB is optional: AutoStore and Software STORE operate independently. However, HSB is required to detect STORE progress or initiate hardware-triggered STORE. In 44-pin TSOP II packages like BA45XI, HSB is present and functional; its absence in some variants (e.g., ×16 TSOP) does not affect core nvSRAM operation.

How does write-latch validation prevent unnecessary STORE cycles?

The device internally tracks whether any SRAM write has occurred since the last STORE or RECALL. AutoStore and Hardware STORE are suppressed unless this latch is set-preventing redundant non-volatile writes during idle power loss. Software STORE bypasses this check, enabling forced persistence regardless of write activity.