Infineon Technologies CY14B101Q2A-SXI

Overview

CY14B101Q2A-SXI from Infineon Technologies (formerly Cypress) is a 1-Mbit serial SPI nonvolatile SRAM (nvSRAM), internally organized as 128K × 8, featuring QuantumTrap nonvolatile storage, AutoStore on power-down, Power-Up RECALL, and dual-speed SPI interface (40 MHz standard / 104 MHz fast read). It operates across 2.7–3.6 V and supports industrial temperature range (–40 °C to +85 °C), deployed in mission-critical data logging systems where power loss resilience is mandatory.

For engineers reviewing the CY14B101Q2A-SXI datasheet, CY14B101Q2A-SXI pinout, CY14B101Q2A-SXI application, or CY14B101Q2A-SXI equivalent, key selection criteria include AutoStore capacitor support (VCAP), absence of WP pin, presence of HSB for hardware STORE/RECALL status signaling, SPI mode 0/3 compatibility, and 8 µA sleep current - all critical for deterministic fail-safe memory retention in embedded controllers and industrial PLCs.

Technical Context

The CY14B101Q2A-SXI integrates SRAM and QuantumTrap nonvolatile elements per cell, enabling infinite SRAM write cycles while guaranteeing 20-year data retention at 85 °C and 1 million STORE cycles. Its dual-speed SPI interface delivers zero-cycle-delay reads/writes at 40 MHz and accelerated reads via FAST_READ at 104 MHz.

AutoStore is enabled by external VCAP capacitor discharge during power loss; RECALL occurs automatically at power-up. Hardware STORE is triggered by pulling HSB low, with status signaled via HSB output (active-low busy indication), eliminating polling dependency. The device lacks WP pin but retains software write protection (WREN/WRDI) and block protection (BP0/BP1).

Key Specifications

Pinout & Package

Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, industrial-grade thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B101Q3A-SXI, CY14B101Q2A-SXI trades hardware write protection for simplified layout and lower pin-count routing; versus FM25V01-G, it offers deterministic power-loss data capture at the cost of finite STORE endurance - making it optimal for industrial systems prioritizing fail-safe retention over write frequency.

Availability

CY14B101Q2A-SXI is available at Aetrix Electronics and suitable for industrial data loggers, programmable logic controllers, smart energy meters, and railway signaling controllers requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for CY14B101Q2A-SXI 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, sensing, connectivity, and security solutions for industrial, automotive, and IoT markets.

CY14B101Q2A-SXI belongs to Infineon's nvSRAM product line, engineered specifically for applications demanding instantaneous, deterministic, and regulatory-compliant nonvolatile data retention without battery backup or firmware intervention.

FAQ

What is the function of the VCAP pin on CY14B101Q2A-SXI?

The VCAP pin connects an external capacitor (typically 4.7 µF) that supplies hold-up energy during VCC collapse, enabling automatic STORE of SRAM contents to QuantumTrap nonvolatile cells. If AutoStore is not required, VCAP must be left unconnected - never tied to ground. This pin is absent in Q1A variants and present in Q2A/Q3A packages.

Does CY14B101Q2A-SXI support hardware write protection?

No. Unlike CY14B101Q3A-SXI, the CY14B101Q2A-SXI omits the WP (Write Protect) pin. Write protection is implemented exclusively through software commands: WREN/WRDI for global lock/unlock and Status Register BP0/BP1 bits for 1/4, 1/2, or full-array block protection.

How does the HSB pin operate during STORE and RECALL?

HSB serves dual roles: as input, pulling it low initiates Hardware STORE; as output, it goes active-low during STORE/RECALL execution and returns high upon completion. After each operation, HSB is driven high with strong pull-up for tHHHD (min 1 µs), then weakly held high - enabling precise hardware synchronization without SPI status polling.

Can CY14B101Q2A-SXI operate at 104 MHz for both read and write?

No. The 104 MHz clock rate applies only to FAST_READ instruction with dummy byte insertion. Standard WRITE and READ instructions are limited to 40 MHz with zero cycle delay. Using 104 MHz for WRITE will result in undefined behavior and data corruption - the device enforces this limitation via internal timing validation.