Infineon Technologies CY14E101Q2A-SXI

Overview

CY14E101Q2A-SXI from Infineon Technologies (formerly Cypress) is a 1-Mbit serial SPI nonvolatile SRAM (nvSRAM), internally organized as 128K × 8, operating at 4.5–5.5 V with 104 MHz fast-read capability and AutoStore enabled via external capacitor on VCAP pin. It performs infinite SRAM write cycles, supports Hardware STORE/RECALL via HSB pin, and delivers 20-year data retention at 85 °C - deployed in industrial PLCs for real-time parameter backup during brownout events.

For engineers reviewing the CY14E101Q2A-SXI datasheet, CY14E101Q2A-SXI pinout, CY14E101Q2A-SXI application, or CY14E101Q2A-SXI equivalent, key selection criteria include VCC range compatibility (4.5–5.5 V), presence of HSB and VCAP pins for hardware-controlled power-loss recovery, SPI mode 0/3 support, and absence of WP pin in this variant - critical for legacy 5V control systems requiring deterministic STORE timing without software intervention.

Technical Context

The CY14E101Q2A-SXI integrates QuantumTrap SONOS nonvolatile elements directly into each SRAM cell, enabling parallel STORE/RECALL between volatile and nonvolatile domains without endurance wear on reads/writes. Its SPI interface operates natively in modes 0 and 3, with dedicated opcodes for STORE, RECALL, ASENB/ASDISB, and SLEEP - all executed as atomic instructions with status reporting via RDY bit and HSB pin.

AutoStore activation relies on external capacitor energy stored at VCAP to sustain internal charge pumps during VCC collapse, triggering automatic STORE within 20 ms of voltage drop below VCC(min). Hardware STORE is initiated by pulling HSB low, while Power-Up RECALL occurs automatically before SPI interface initialization - ensuring memory state restoration prior to host controller access.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, body width 7.5 mm, standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B101Q2A-SXI, the CY14E101Q2A-SXI enables direct integration into existing 5V industrial backplanes without level shifters, while FM25V10-G trades VCC flexibility and HSB control for nanosecond STORE latency - making CY14E101Q2A-SXI optimal for cost-sensitive, safety-certified 5V systems requiring field-proven reliability over 20 years.

Availability

CY14E101Q2A-SXI is available at Aetrix Electronics and suitable for industrial PLCs, motion controllers, smart energy meters, and railway signaling systems requiring stable component supply across extended product lifecycles.

Supply support for CY14E101Q2A-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, automotive MCUs, and industrial connectivity solutions.

This device belongs to Infineon's nvSRAM product line, designed specifically for mission-critical industrial applications demanding deterministic, capacitor-backed nonvolatile storage without battery maintenance or Flash wear leveling overhead.

FAQ

What is the function of the VCAP pin on CY14E101Q2A-SXI?

The VCAP pin connects to an external 4.7 µF tantalum capacitor that supplies energy to complete the AutoStore operation during VCC dropout. When VCC falls below the threshold, internal circuitry uses VCAP charge to transfer SRAM contents to QuantumTrap nonvolatile cells within 20 ms. Leaving VCAP unconnected disables AutoStore, but Hardware STORE via HSB remains functional.

Does CY14E101Q2A-SXI support SPI mode 1 or mode 2?

No. The device supports only SPI modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the Functional Description section of datasheet 001-54393 Rev. *N. Attempting mode 1 or 2 will result in misaligned sampling and corrupted data transfers due to mismatched clock polarity and phase timing.

Can the HSB pin be left floating in normal operation?

No. HSB must be externally pulled up to VCC with a 10 kΩ resistor when not used as a Hardware STORE trigger. Leaving it floating risks spurious STORE initiation due to noise coupling, especially in electrically noisy industrial environments. The datasheet explicitly requires a weak pull-up to ensure HIGH default state during idle periods.

Is the 8-byte serial number accessible during normal SPI operation?

Yes. The serial number is readable at any time using the RDSN instruction (opcode 0x4B) or FAST_RDSN (0x4C), even during active SRAM read/write operations. It resides in a dedicated nonvolatile register and persists across STORE/RECALL cycles - commonly used for device authentication in firmware update protocols and field-replaceable unit tracking.