Infineon Technologies CY14B108L-BA45XI

Overview

CY14B108L-BA45XI from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) with ×8 organization (1024 K × 8), 45 ns access time, single 3 V (+20% / –10%) supply, industrial temperature range (–40°C to +85°C), and QuantumTrap nonvolatile storage. It performs automatic STORE on power-down using a VCAP capacitor and supports software/hardware-initiated STORE/RECALL, enabling data retention in mission-critical industrial control and metering systems.

For engineers reviewing the CY14B108L-BA45XI datasheet, CY14B108L-BA45XI pinout, CY14B108L-BA45XI application, or CY14B108L-BA45XI equivalent, key selection criteria include AutoStore timing dependency on VCAP capacitance, HSB-driven hardware STORE arbitration, ×8 vs ×16 configuration pin compatibility, and 1 million STORE endurance versus infinite RECALL cycles.

Technical Context

This nvSRAM integrates standard fast SRAM array (2048 × 2048 × 2) with parallel QuantumTrap nonvolatile elements per cell. STORE and RECALL execute atomically across all memory cells, blocking SRAM access during operation. The device uses internal voltage regulation to charge VCAP and triggers AutoStore when VCC drops below VSWITCH (2.7 V typical).

Hardware STORE is initiated by driving HSB LOW, with tDELAY (100 ns min) allowing pending writes to complete. Software STORE uses address-based command sequences, while RECALL occurs automatically at power-up or via software - both restoring full 1024 K × 8 SRAM content from nonvolatile storage within tHRECALL (max 20 ms).

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), Type II, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V10-G and AS1C8M8P-45TIN, CY14B108L-BA45XI offers higher density and faster access than the former, and more relaxed supply tolerance than the latter - making it optimal for industrial systems requiring robustness across wide VCC and temperature ranges without sacrificing speed or capacity.

Availability

CY14B108L-BA45XI is available at Aetrix Electronics and suitable for industrial PLCs, smart electricity meters, and railway signaling controllers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for CY14B108L-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 IoT applications, with emphasis on mixed-signal integration and long-lifecycle support.

CY14B108L belongs to Cypress's QuantumTrap nvSRAM product line, engineered specifically for systems demanding battery-free nonvolatility, deterministic power-loss recovery, and seamless SRAM interface compatibility.

FAQ

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

The CY14B108L-BA45XI requires a minimum 0.1 µF X7R ceramic capacitor on the VCAP pin, rated for ≥10 V, placed within 5 mm of the package. This value ensures sufficient charge to complete a full 8-Mbit STORE within tSTORE (max 25 ms) when VCC drops from 3.0 V to VSWITCH (2.7 V). Larger values extend margin but do not improve timing.

Can CY14B108L-BA45XI operate in ×16 mode?

No. The CY14B108L-BA45XI is factory-configured for 1024 K × 8 organization only. Its pinout lacks BHE/ BLE pins and uses A19 as a valid address line - unlike the CY14B108N (×16 variant), which omits A19 and includes byte-enable inputs. Attempting ×16 operation will result in incorrect addressing and data corruption.

How does the AutoStore Disable errata affect system design?

The documented errata states that the AutoStore Disable feature - intended to suppress automatic STORE via software sequence - does not function. Systems requiring conditional STORE must instead use HSB-driven hardware STORE or software STORE exclusively, and ensure VCAP is either disconnected or actively managed to prevent unintended AutoStore during transient brownouts.

Is HSB pin pull-up required for normal operation?

An external pull-up on HSB is optional but recommended for noise immunity. The device includes a 100 kΩ internal weak pull-up; however, in electrically noisy industrial environments, a 10 kΩ external pull-up to VCC ensures rapid HIGH-state recovery post-STORE and prevents false LOW detection due to EMI coupling on the open-drain line.