Infineon Technologies CY14B101LA-ZS45XIT

Overview

CY14B101LA-ZS45XIT from Infineon Technologies (formerly Cypress) is a 1-Mbit nonvolatile SRAM (nvSRAM) with QuantumTrap technology, organized as 128 K × 8, 45 ns access time, single 3.0 V (–10% to +20%) supply, industrial temperature range (–40°C to +85°C), and integrated AutoStore on power-loss. It serves as drop-in SRAM replacement in mission-critical data logging systems where power interruption must not cause data loss.

For engineers reviewing the CY14B101LA-ZS45XIT datasheet, CY14B101LA-ZS45XIT pinout, CY14B101LA-ZS45XIT application, or CY14B101LA-ZS45XIT equivalent, key selection factors include VCAP capacitor dependency for AutoStore, HSB pin behavior for hardware-initiated STORE, ×8 vs ×16 configuration mapping, and 1 million STORE endurance versus infinite SRAM read/write cycles.

Technical Context

This nvSRAM integrates parallel SRAM and nonvolatile QuantumTrap cells per bit, enabling simultaneous STORE/RECALL across all 131,072 bytes. STORE is triggered automatically at VCC < VSWITCH (2.2 V typ.), via software address sequence, or by pulling HSB LOW - all inhibiting SRAM access during execution.

RECALL occurs automatically on power-up or via software command, restoring full memory contents in ≤15 ms. The device supports byte-level control (BLE/BHE only in ×16 mode), tri-state I/Os, and requires external VCAP capacitance (12 µF min) tied to dedicated VCAP pin for reliable AutoStore operation.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), RoHS-compliant, 400 mil body width, lead pitch 0.8 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V10-G and MB85RS1MT-FPN-GE1, CY14B101LA-ZS45XIT uniquely delivers parallel SRAM compatibility, autonomous power-loss STORE, and hardware interrupt capability - critical for real-time deterministic systems where bus timing and failure response cannot be delegated to firmware.

Availability

CY14B101LA-ZS45XIT is available at Aetrix Electronics and suitable for industrial data loggers, medical diagnostic recorders, telecom base station controllers, and automotive telematics units requiring stable component supply with guaranteed 20-year data retention and 1-million-cycle nonvolatile endurance.

Supply support for CY14B101LA-ZS45XIT 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, delivering power systems, microcontrollers, sensors, and memory solutions for industrial, automotive, and IoT applications.

CY14B101LA-ZS45XIT belongs to Infineon's nvSRAM product line, designed specifically to replace battery-backed SRAM in systems where maintenance-free, long-term data integrity under intermittent power is mandatory.

FAQ

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

The CY14B101LA-ZS45XIT requires a minimum 12 µF tantalum or low-ESR ceramic capacitor on the VCAP pin. This value ensures sufficient energy to complete a full 1-Mbit STORE cycle when VCC drops below VSWITCH (2.2 V). Using less capacitance risks incomplete STORE and data corruption. Datasheet specifies 12 µF as absolute minimum; 22 µF is recommended for margin across temperature and voltage tolerance.

Can CY14B101LA-ZS45XIT operate in ×16 mode?

No - CY14B101LA-ZS45XIT is the ×8 variant (128 K × 8), distinct from CY14B101NA which supports ×16 (64 K × 16). Pinout, address mapping (A0–A16 active), and data bus width (DQ0–DQ7 only) are fixed for ×8 operation. Attempting ×16 use will result in incorrect addressing and data misalignment due to missing BHE/ BLE pins in this package variant.

Is HSB pin functional in the 44-pin TSOP II package of CY14B101LA-ZS45XIT?

Yes - HSB is present and fully functional in the 44-pin TSOP II package used by CY14B101LA-ZS45XIT. The datasheet explicitly notes HSB is "not available in 44-pin TSOP II (×16) package", confirming its inclusion in the ×8 variant. It operates as open-drain output for status indication and input for hardware STORE initiation, requiring external pull-up for proper idle-HIGH behavior.

Does CY14B101LA-ZS45XIT require initialization after power-up before use?

No initialization sequence is required. After power-up RECALL completes (~15 ms), the device behaves identically to a standard SRAM: CE/OE/WE controls function immediately, and all addresses/data lines are ready for read/write. However, firmware must wait for RECALL completion - verified either by polling HSB (goes HIGH post-RECALL) or by inserting fixed delay - before accessing memory to avoid reading stale or undefined data.