Infineon Technologies CY14B101L-SZ45XC

Overview

CY14B101L-SZ45XC from Cypress Semiconductor is a 1 Mbit (128K × 8) nonvolatile static RAM with QuantumTrap technology, delivering 45 ns access time, single 3V (+20%, –10%) operation, and automatic STORE on power-down using an external VCAP capacitor. It functions as a drop-in SRAM replacement in systems requiring persistent data retention without battery backup-used in industrial PLCs, medical data loggers, and telecom control cards where write-cycle integrity during brownout is critical.

For engineers reviewing the CY14B101L-SZ45XC datasheet, CY14B101L-SZ45XC pinout, CY14B101L-SZ45XC application, or CY14B101L-SZ45XC equivalent, key selection criteria include AutoStore timing dependency on VCAP capacitance, HSB-controlled hardware store arbitration, software STORE/RECALL address sequences, and compatibility with STK14CA8 in 32-pin SOIC footprint.

Technical Context

The CY14B101L integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous 131,072-byte STORE/RECALL operations. Its architecture decouples volatile read/write cycles (unlimited) from nonvolatile endurance (200,000 STORE cycles), with RECALL restoring full memory contents in ≤10 ms after power-up.

STORE initiation occurs via three independent paths: AutoStore triggered by VCC falling below VSWITCH (2.7 V), hardware STORE via HSB pin assertion, or software STORE via six-address CE-controlled READ sequence. All paths inhibit SRAM access during execution and require prior WRITE activity for AutoStore/HSB activation-preventing spurious stores.

Key Specifications

Pinout & Package

Package: 32-pin Small Outline Integrated Circuit (SOIC), 300 mil width, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14CA8-35I/W and FM24CL16B-G, CY14B101L-SZ45XC uniquely combines parallel SRAM compatibility, integrated AutoStore, and 1 Mbit density-making it optimal for retrofitting legacy 8-bit systems needing reliable, maintenance-free nonvolatility without architectural changes.

Availability

CY14B101L-SZ45XC is available at Aetrix Electronics and suitable for industrial programmable logic controllers, medical diagnostic data loggers, and telecom base station control cards requiring stable component supply and long-term obsolescence management.

Supply support for CY14B101L-SZ45XC 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.

The CY14B nvSRAM product line targets systems requiring deterministic, battery-free nonvolatility in space-constrained, thermally demanding environments-emphasizing seamless SRAM drop-in replacement and guaranteed data retention under brownout conditions.

FAQ

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

The CY14B101L-SZ45XC requires a minimum 12 µF tantalum or 47 µF ceramic capacitor on the VCAP pin to ensure successful STORE completion during a 100 µs VCC collapse event. This value is derived from internal charge-pump efficiency and QuantumTrap programming current requirements specified in DC Electrical Characteristics (Table 8, Rev. *K).

Can software STORE and AutoStore occur simultaneously?

No. The CY14B101L-SZ45XC serializes all STORE operations: AutoStore is disabled if a software STORE is active, and vice versa. The device uses internal state machines to prioritize and queue requests, ensuring atomicity-only one STORE executes at a time, with others held pending until completion.

Is the HSB pin mandatory for system integration?

No. The HSB pin is optional: if unused, it may be left unconnected due to its internal weak pull-up. However, connecting it with a 10 kΩ external pull-up enables real-time monitoring of STORE progress and allows the host processor to pause critical tasks during nonvolatile write execution.

How does the CY14B101L-SZ45XC handle power-up RECALL timing in relation to system reset?

RECALL begins automatically when VCC exceeds VSWITCH (2.7 V) and completes in ≤10 ms (tHRECALL). To avoid race conditions, system reset should be asserted for ≥15 ms after VCC stabilization-ensuring RECALL finishes before CPU initialization accesses the memory array.