Infineon Technologies CY14B104L-BA20XIT

Overview

CY14B104L-BA20XIT from Cypress Semiconductor is a 4 Mbit (512K × 8) nonvolatile SRAM with QuantumTrap® technology, operating at 20 ns access time, single 3V supply (+20% to –10%), and industrial temperature range (–40°C to +85°C). It integrates fast SRAM with on-chip nonvolatile storage, enabling automatic STORE on power loss using an external VCAP capacitor and software- or hardware-triggered RECALL. Used in industrial PLCs for real-time data retention during brownouts.

For engineers reviewing the CY14B104L-BA20XIT datasheet, CY14B104L-BA20XIT pinout, CY14B104L-BA20XIT application, or CY14B104L-BA20XIT equivalent, key selection criteria include AutoStore timing (tSTORE = 15 ms max), VCAP capacitor sizing (0.1 µF), HSB pin behavior during STORE/RECALL, and x8 vs. x16 configuration compatibility with existing memory controllers.

Technical Context

The CY14B104L-BA20XIT implements a dual-cell architecture: standard SRAM for high-speed read/write and embedded QuantumTrap nonvolatile elements per cell. STORE transfers data from SRAM to nonvolatile storage; RECALL restores it on power-up - both operations inhibit concurrent SRAM access.

AutoStore initiates automatically when VCC drops below VSWITCH (2.7 V typ), using charge stored on the VCAP pin (0.1 µF ceramic). Hardware STORE is triggered by pulling HSB low; software STORE uses a six-address CE-controlled read sequence (0x4E38 → 0xB1C7 → 0x83E0 → 0x7C1F → 0x703F → 0x8FC0).

Key Specifications

Pinout & Package

Package: 48-ball FBGA (7 mm × 9 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 STK14C88-3AJ5F and FM24CL04-G, the CY14B104L-BA20XIT uniquely combines 20 ns parallel access, integrated AutoStore with VCAP, and HSB status signaling - enabling simpler, more reliable power-loss recovery in real-time embedded systems.

Availability

CY14B104L-BA20XIT is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion devices, automotive body control modules, and telecom line cards requiring stable component supply across extended product lifecycles.

Supply support for CY14B104L-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.

The CY14B104L belongs to Cypress's nvSRAM product line, engineered specifically for applications demanding instant nonvolatile storage without batteries, capacitors, or external supervision circuitry.

FAQ

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

The CY14B104L-BA20XIT requires a 0.1 µF X7R ceramic capacitor on the VCAP pin. This value ensures ≥15 ms STORE duration at VCC = 2.7 V and –40°C, per DC Electrical Characteristics Table on page 7 of datasheet 001-07102 Rev. *L. Larger values do not extend STORE time due to internal current limiting.

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 unused. When disconnected, it remains HIGH during normal operation and does not affect SRAM functionality. It only drives LOW during active STORE/RECALL or when externally asserted.

Does the CY14B104L-BA20XIT support x16 data bus configuration?

No - the CY14B104L variant is strictly 512K × 8 (x8). The x16 configuration (256K × 16) is implemented in the CY14B104N. Pinout, address mapping (A0–A17), and byte-enable pins (BHE/ BLE) differ; mixing them causes functional failure.

How is software STORE disabled to prevent unintended nonvolatile writes?

Software STORE is disabled by executing the AutoStore disable sequence: six consecutive CE-controlled reads to addresses 0x4E38, 0xB1C7, 0x83E0, 0x7C1F, 0x703F, then 0x8B45. This sequence must use CE control, with WE held HIGH throughout; intervening writes or address errors abort the command.