Infineon Technologies CY14B101LA-SP45XI

Overview

CY14B101LA-SP45XI 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% supply, industrial temperature range (–40°C to +85°C), and integrated AutoStore on power-down. It serves as drop-in SRAM replacement in mission-critical data logging, metering, and industrial control systems requiring persistent memory without external backup.

For engineers reviewing the CY14B101LA-SP45XI datasheet, CY14B101LA-SP45XI pinout, CY14B101LA-SP45XI application, or CY14B101LA-SP45XI equivalent, key selection criteria include STORE cycle endurance (1 million), data retention (20 years), VCAP capacitor dependency for AutoStore, and ×8 vs ×16 configuration compatibility across SOIC/TSOP/SSOP/FBGA packages.

Technical Context

This nvSRAM integrates parallel SRAM and QuantumTrap nonvolatile storage in each cell, enabling simultaneous STORE/RECALL of all 131,072 bytes. STORE is triggered automatically at VCC < VSWITCH (2.2 V), via HSB pin assertion, or software address sequence; RECALL occurs on power-up or via software command.

Operation requires external 4.7 µF tantalum or 10 µF ceramic capacitor on VCAP to sustain STORE during brownout. The device inhibits SRAM access during STORE/RECALL cycles and supports infinite SRAM read/write cycles while limiting nonvolatile STOREs to 1 million per cell.

Key Specifications

Pinout & Package

Package: 44-pin Thin Small Outline Package (TSOP II), Type II, RoHS-compliant, body size 10.16 mm × 18.41 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B101LA-SP25XI, the SP45XI trades speed for lower dynamic power and relaxed timing margin; versus FM24CL16B-G, it offers 8× density and deterministic AutoStore latency but requires VCAP management and has finite STORE endurance.

Availability

CY14B101LA-SP45XI is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, railway signaling loggers, and medical infusion pumps requiring stable component supply with guaranteed 20-year data retention and industrial temperature operation.

Supply support for CY14B101LA-SP45XI 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 acquired Cypress Semiconductor in 2020 and maintains full product continuity, documentation, and support for the nvSRAM portfolio originally developed by Cypress.

This part belongs to the QuantumTrap nvSRAM product line, designed specifically for industrial and infrastructure applications demanding battery-free, high-reliability nonvolatile memory with SRAM speed and interface simplicity.

FAQ

What capacitor value and type are required on the VCAP pin?

A 4.7 µF solid tantalum or 10 µF X5R/X7R ceramic capacitor must be placed directly between VCAP and VSS, within 5 mm of the package. Tantalum capacitors require ≥20% voltage derating (rated ≥6.3 V); ceramic types must meet 10 µF minimum at DC bias. Missing or undersized VCAP causes STORE failure and data corruption during power loss.

Can CY14B101LA-SP45XI be used as a direct replacement for standard SRAMs?

Yes - it is pin-compatible and timing-compatible with industry-standard 128 K × 8 SRAMs (e.g., IS61LV12816AL), provided VCAP is added and AutoStore is either enabled (with capacitor) or disabled via software sequence. No changes to address/data/control routing are needed, but OE/WE pull-ups must ensure tristate behavior during power-up.

How does the HSB pin function during STORE operations?

HSB is an open-drain output that goes LOW during any STORE (AutoStore, Hardware, or Software). When externally pulled LOW, it initiates a hardware STORE. After STORE completion, HSB is driven HIGH for tHHHD (100 ns min), then weakly held HIGH by internal pull-up. External pull-up resistor (10 kΩ) is recommended for noise immunity in noisy industrial environments.

Is software STORE compatible with all host processors?

Yes - software STORE uses a specific 5-cycle address write sequence (0xAA, 0x55, 0xAA, 0x55, 0x90) to the same address location, detectable by any processor supporting standard SRAM writes. No special instructions or drivers are required; however, interrupts must be disabled during the sequence to prevent address bus corruption.