Infineon Technologies CY14B101LA-SZ45XI

Overview

CY14B101LA-SZ45XI 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, and industrial temperature range (–40°C to +85°C). It performs automatic STORE on power-down using an external VCAP capacitor and supports software- or hardware-initiated STORE/RECALL cycles for mission-critical data retention in embedded control systems.

For engineers reviewing the CY14B101LA-SZ45XI datasheet, CY14B101LA-SZ45XI pinout, CY14B101LA-SZ45XI application, or CY14B101LA-SZ45XI equivalent, key selection criteria include AutoStore timing compliance, VCAP capacitor sizing, HSB signal handling during power transition, and ×8 bus interface compatibility with legacy 8-bit microcontrollers and FPGA glue logic.

Technical Context

This nvSRAM integrates standard fast SRAM array (1024 × 1024) with parallel QuantumTrap nonvolatile storage cells per bit. All 131,072 bytes are stored or recalled simultaneously - no block addressing or page management required. The architecture eliminates firmware overhead for data persistence while maintaining SRAM-like random-access performance.

STORE is triggered by VCC drop below VSWITCH (2.5 V typ.), initiating autonomous transfer from SRAM to QuantumTrap using charge stored on VCAP. RECALL occurs automatically at power-up, restoring full memory contents before system initialization completes. HSB provides real-time hardware status signaling for external coordination of critical operations.

Key Specifications

Pinout & Package

Package: 32-pin Small Outline Integrated Circuit (SOIC), 300 mil width, RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V10-G and MB85RS1MT-FPN-GE1, CY14B101LA-SZ45XI delivers true SRAM timing transparency, hardware STORE arbitration via HSB, and seamless ×8 bus integration - making it optimal for retrofitting legacy 8-bit designs requiring guaranteed power-fail data capture without firmware changes.

Availability

CY14B101LA-SZ45XI is available at Aetrix Electronics and suitable for industrial PLC data logging, smart meter firmware state backup, and railway signaling controller memory requiring stable component supply across extended product lifecycles.

Supply support for CY14B101LA-SZ45XI 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, sensors, and memory solutions for industrial, automotive, and IoT applications.

CY14B101LA-SZ45XI belongs to Infineon's nvSRAM product line, engineered specifically for deterministic, battery-free data retention in mission-critical embedded systems where power integrity cannot be assumed.

FAQ

What capacitor value and type is required for reliable AutoStore operation?

A 4.7 µF solid tantalum capacitor (±20% tolerance, 6.3 V rating) or 10 µF X5R/X7R ceramic capacitor must be placed between VCAP and VSS, within 5 mm of the package. Tantalum offers superior energy density and low ESR for consistent 45 ns STORE timing; ceramic requires larger footprint but avoids MnO₂ ignition risk. Both must meet DC bias derating per datasheet Figure 4.

How does the HSB pin function during power-up and power-down sequences?

At power-up, HSB is driven HIGH for t_HHHD (100 ns max) then weakly pulled HIGH internally; external pull-up is optional. During power-down, HSB goes LOW when AutoStore initiates and remains LOW until STORE completes (~1 ms). If HSB is externally pulled LOW, it triggers immediate Hardware STORE - but only if at least one write occurred since last RECALL.

Can CY14B101LA-SZ45XI be used as a drop-in replacement for standard SRAMs?

Yes - pinout and timing are SRAM-compatible: identical A0–A16, DQ0–DQ7, CE/OE/WE, and VCC/VSS placement. However, VCAP must be populated and HSB monitored or tied HIGH if unused. No firmware changes needed for basic read/write, but leveraging AutoStore requires power-fail detection circuitry or HSB polling in host code.

What is the minimum VCC voltage at which RECALL completes successfully?

RECALL completes reliably down to VCC = 2.2 V, as specified in DC Electrical Characteristics Table 9. Below this, internal voltage regulators cannot sustain QuantumTrap cell readout margin. System designers must ensure power supply hold-up time exceeds t_RC (max 10 ms) at 2.2 V to guarantee full 131,072-byte restoration before reset assertion.