Infineon Technologies CY14E101J2-SXIT

Overview

CY14E101J2-SXIT from Infineon Technologies (formerly Cypress) is a 1-Mbit (128 K × 8) serial I²C nonvolatile SRAM with integrated real-time clock, operating at 4.5–5.5 V, featuring AutoStore on power-loss using external capacitor, Power-Up RECALL, and programmable square-wave output (1 Hz / 512 Hz / 4096 Hz / 32.768 kHz). It delivers infinite SRAM read/write cycles, 1 million STORE cycles to QuantumTrap nonvolatile elements, and 20-year data retention at 85 °C - deployed in industrial metering systems requiring deterministic nonvolatile data capture without battery backup.

For engineers reviewing the CY14E101J2-SXIT datasheet, CY14E101J2-SXIT pinout, CY14E101J2-SXIT application, or CY14E101J2-SXIT equivalent, key selection criteria include I²C speed support up to 3.4 MHz, RTC alarm/interrupt capability, hardware STORE/RECALL via HSB pin, VRTCcap/VRTCbat dual backup options, and SOIC-16 package compatibility with legacy board layouts.

Technical Context

This device integrates two independent functional blocks: a 128 K × 8 nvSRAM core with QuantumTrap nonvolatile storage and a full-featured RTC subsystem including watchdog timer, alarm registers, and programmable square-wave generator. The memory and RTC share a single I²C interface but operate on separate slave addresses and control register maps.

STORE operations are triggered automatically on VCC drop below threshold (using VCAP capacitor), by software command, or by asserting HSB low; RECALL occurs automatically at power-up or via I²C command. RTC backup is supported either by capacitor (VRTCcap) or battery (VRTCbat), with typical backup current of 0.45 µA and sleep mode current of 8 µA.

Key Specifications

Pinout & Package

16-pin Small Outline Integrated Circuit (SOIC) package, RoHS-compliant, 300 mil body width, standard gull-wing lead form.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK14CA8-NF55I and DS1347Z+, CY14E101J2-SXIT uniquely combines I²C-accessible nvSRAM and full RTC in one SOIC-16 package, eliminating inter-chip timing skew, reducing PCB area by ~40%, and enabling single-interface firmware integration.

Availability

CY14E101J2-SXIT is available at Aetrix Electronics and suitable for smart metering, industrial data loggers, medical diagnostics, and energy gateway applications requiring stable component supply, long-life data retention, and deterministic power-loss recovery.

Supply support for CY14E101J2-SXIT 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 AG is a German semiconductor manufacturer specializing in power management, automotive, industrial, and security solutions, with global R&D and manufacturing infrastructure.

CY14E101J2-SXIT belongs to the Infineon nvSRAM product line, designed specifically for industrial and metering applications where deterministic nonvolatile storage and autonomous timekeeping must coexist without external supervision or battery dependency.

FAQ

What is the maximum I²C clock frequency supported by CY14E101J2-SXIT?

The device supports I²C Fast Mode Plus (1 MHz) and High-Speed Mode (3.4 MHz) in addition to standard (100 kHz) and fast (400 kHz) modes. All modes use the same physical interface and slave addressing scheme, with timing parameters specified per mode in the datasheet's AC switching characteristics table.

Can CY14E101J2-SXIT operate without an external crystal?

Yes - the RTC oscillator can be disabled entirely, or configured to use internal RC timing (with reduced accuracy). However, for full RTC functionality including alarm, watchdog, and square-wave output, a 32.768 kHz crystal must be connected between Xin and Xout with appropriate load capacitors per layout guidelines.

How does AutoStore behave when both VCAP and VRTCcap are populated?

VCAP powers the nvSRAM STORE operation during VCC dropout; VRTCcap powers only the RTC circuitry. They operate independently. Populating both is valid and common: VCAP ensures memory persistence, while VRTCcap maintains timekeeping during extended outages - no conflict or interaction between the two paths.

Is the 8-byte serial number writable or locked at factory?

The 8-byte serial number is factory-programmed and permanently locked. It is readable via I²C at fixed address offset 0x00 in the serial number slave address space (0x57), and cannot be modified, erased, or reprogrammed in-system or during programming.