Infineon Technologies CY14B108L-BA45XIT

Overview

CY14B108L-BA45XIT from Cypress Semiconductor is an 8-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 1024 K × 8, 45 ns access time, single 3 V (+20% / –10%) supply, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using VCAP capacitor support and supports software/hardware-initiated STORE/RECALL cycles for mission-critical data retention in embedded control systems.

For engineers reviewing the CY14B108L-BA45XIT datasheet, CY14B108L-BA45XIT pinout, CY14B108L-BA45XIT application, or CY14B108L-BA45XIT equivalent, key selection criteria include AutoStore reliability under brown-out conditions, HSB-driven hardware STORE timing coordination, VCAP capacitor sizing (0.1 µF), and ×8 vs ×16 configuration compatibility in legacy SRAM socket designs.

Technical Context

The CY14B108L-BA45XIT integrates a standard fast SRAM array (2048 × 2048 × 2) with parallel QuantumTrap nonvolatile elements per cell, enabling simultaneous STORE/RECALL across all memory locations. Its architecture decouples volatile read/write performance (infinite cycles) from nonvolatile endurance (1 million STOREs, 20-year retention).

AutoStore is triggered by VCC falling below VSWITCH (2.7 V min), disconnecting VCAP from VCC and powering the STORE operation autonomously. The HSB pin serves dual roles: open-drain busy indicator during STORE and active-Low hardware trigger - with tDELAY (100 ns min) allowing pending writes to complete before initiation.

Key Specifications

Pinout & Package

Package: 48-ball fine-pitch ball grid array (FBGA), RoHS-compliant, 7 mm × 9 mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-45I and FM24V08-G, the CY14B108L-BA45XIT uniquely combines 45 ns SRAM speed, hands-off AutoStore, 1M STORE endurance, and 20-year retention in a single 3 V package-making it optimal for safety-critical, maintenance-free deployments where power integrity cannot be assumed.

Availability

CY14B108L-BA45XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and telecom base station configuration requiring stable component supply and long-term lifecycle assurance.

Supply support for CY14B108L-BA45XIT 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.

The CY14B108L series belongs to Cypress's QuantumTrap nvSRAM product line, designed specifically for applications demanding SRAM-speed access with guaranteed nonvolatile data retention during uncontrolled power loss-without batteries or external supervision.

FAQ

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

The CY14B108L-BA45XIT requires a minimum 0.1 µF X7R ceramic capacitor connected to the VCAP pin. This value ensures sufficient stored energy to complete one full STORE cycle when VCC drops below 2.7 V. Larger capacitors (e.g., 1 µF) extend margin but do not improve STORE success rate beyond specification. Tantalum or electrolytic capacitors are not recommended due to ESR and leakage limitations.

Can CY14B108L-BA45XIT be used as a drop-in replacement for standard SRAMs?

Yes, in ×8 mode with identical pinout and timing, CY14B108L-BA45XIT operates as a functionally compatible 1024 K × 8 SRAM. However, VCAP must be populated and HSB monitored or tied HIGH if AutoStore is unused. Unlike standard SRAM, it asserts HSB LOW during STORE/RECALL, requiring brief bus arbitration pauses in tightly timed systems.

Does the device support both ×8 and ×16 configurations?

No - CY14B108L-BA45XIT is strictly a ×8-configured device (1024 K × 8), as indicated by the "L" suffix. The ×16 variant is CY14B108N. Pinouts differ: CY14B108L uses DQ0–DQ7 and omits BHE/ BLE; CY14B108N uses DQ0–DQ15 and includes BHE/ BLE pins. Interchanging them causes address/data misalignment and functional failure.

How does the AutoStore Disable feature behave given the documented errata?

The AutoStore Disable feature does not function per Errata on page 24 of the datasheet. AutoStore remains permanently enabled and cannot be disabled via software sequence. To prevent unintended STOREs, ensure VCAP is either properly sized and connected or omitted entirely - and verify that the soft-disable sequence is not executed, as it has no effect and may cause undefined behavior.