Infineon Technologies CY14B101LA-ZS20XIT

Overview

CY14B101LA-ZS20XIT from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 128 K × 8, supporting 20 ns access time, single 3.0 V ±10% supply, and industrial temperature range (–40 °C to +85 °C). It performs automatic STORE on power-down using an external VCAP capacitor and supports software/hardware-initiated STORE/RECALL for data retention in mission-critical industrial control and metering systems.

For engineers reviewing the CY14B101LA-ZS20XIT datasheet, CY14B101LA-ZS20XIT pinout, CY14B101LA-ZS20XIT application, or CY14B101LA-ZS20XIT equivalent, key selection considerations include AutoStore timing dependency on VCAP capacitance, HSB-driven hardware store arbitration, ×8 bus interface compatibility, and 20-year data retention without battery backup.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL across all 131,072 bytes. It operates in three STORE modes: AutoStore (triggered by VCC drop below VSWITCH), Hardware STORE (via HSB pin assertion), and Software STORE (via address sequence).

During STORE or RECALL, SRAM read/write is inhibited; RECALL occurs automatically at power-up. The device guarantees 1 million STORE cycles and infinite RECALL/read/write cycles, with VCAP supplying regulated energy for nonvolatile write completion during brownout.

Key Specifications

Pinout & Package

Packaged in a 32-pin Small Outline Integrated Circuit (SOIC) with 0.3 inch body width and standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14C88-3AJ and FM24V10-G, CY14B101LA-ZS20XIT delivers deterministic 20 ns SRAM performance with integrated AutoStore arbitration via HSB and VCAP regulation-critical for deterministic fail-safe logging in deterministic real-time systems.

Availability

CY14B101LA-ZS20XIT is available at Aetrix Electronics and suitable for smart metering, industrial PLC data logging, railway signaling controllers, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for CY14B101LA-ZS20XIT 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and security solutions.

CY14B101LA-ZS20XIT belongs to Infineon's legacy nvSRAM product line-originally developed by Cypress-to deliver battery-free, high-reliability nonvolatile memory for industrial and infrastructure applications demanding guaranteed data retention across power interruptions.

FAQ

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

The CY14B101LA-ZS20XIT requires a minimum 4.7 µF ±20% tantalum capacitor on the VCAP pin to ensure successful STORE completion when VCC drops below the 2.2 V switch threshold. Lower values risk incomplete STORE and data corruption; the capacitor must be placed within 5 mm of the VCAP pin with low-ESR layout to maintain ≥2.0 V during the full tSTORE period.

Can CY14B101LA-ZS20XIT be used in a ×16 bus configuration?

No-CY14B101LA-ZS20XIT is specifically the ×8 variant (128 K × 8), as indicated by the "LA" suffix and confirmed in the datasheet's organization table. The ×16 version is CY14B101NA. Pinouts, address mapping (A0–A16), and DQ pin count (DQ0–DQ7 only) are fixed for ×8 operation; attempting ×16 interfacing will result in incorrect addressing and data misalignment.

How does the HSB pin behave during a Software STORE?

During a Software STORE, the HSB pin is driven LOW for the duration of the STORE operation (tSTORE ≈ 20 ms max), identical to its behavior during Hardware STORE. This provides synchronous external visibility into nonvolatile write progress regardless of initiation method-enabling host processors to pause I/O or enter low-power wait states until HSB returns HIGH.

Is RECALL guaranteed to complete before the first valid read cycle after power-up?

Yes-RECALL is fully completed before the device exits power-on reset. The datasheet specifies tRC (RECALL time) ≤ 20 ms, and CE/OE/WE timing windows for first read are defined only after this interval. System designers must ensure MPU reset release is delayed ≥20 ms post-VCC stabilization or use HSB monitoring to gate memory access until RECALL finishes.