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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY14B101I-SFXIT

Name: CY14B101I-SFXIT
Brand: Infineon Technologies
SKU: CY14B101I-SFXIT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY14B101I-SFXIT

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: CY14B101I-SFXIT.pdf

Description:: IC NVSRAM 1MBIT I2C 16SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,101

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Product details

Overview

CY14B101I from Infineon Technologies (formerly Cypress) is a 1-Mbit serial I²C nonvolatile SRAM with integrated real-time clock, organized as 128 K × 8, featuring AutoStore on power-down, Power-Up RECALL, and programmable square wave output (1 Hz / 512 Hz / 4.096 kHz / 32.768 kHz). It operates from 2.7 V to 3.6 V, supports I²C up to 3.4 MHz, and delivers 0.45 µA typical RTC backup current - used in industrial data loggers for timestamped event storage with battery-backed timekeeping.

For engineers reviewing the CY14B101I datasheet, CY14B101I pinout, CY14B101I application, or CY14B101I equivalent, key selection considerations include I²C speed mode compatibility (Standard/Fast/Fast-Plus/High-Speed), dual backup options (capacitor or battery for RTC), hardware STORE/RECALL via HSB pin, and software-controlled memory protection granularity (1/4, 1/2, or full array).

Technical Context

The device integrates two independent functional blocks: a 128 K × 8 nvSRAM using QuantumTrap nonvolatile storage cells and a full-featured RTC with alarm, watchdog timer, and programmable square-wave generator. Memory STORE/RECALL is managed through three parallel mechanisms - automatic on power transition, I²C command, or HSB pin assertion.

RTC operation supports dual backup sources (VCAP-capacitor or VRTCbat-battery), with dedicated pins (XIN/XOUT) for 32.768 kHz crystal, INT/SQW pin configurable as interrupt or calibrated square-wave output, and backup current specified at 0.45 µA (typ) at 85 °C - enabling >20-year data retention under industrial thermal stress.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	1 Mbit (128 K × 8) - provides byte-addressable nonvolatile storage without wear leveling overhead.
I²C Speed Support	Up to 3.4 MHz (High-Speed mode) - enables sub-300 µs write cycles for burst transfers in time-critical logging.
Operating Voltage	2.7 V to 3.6 V - compatible with standard 3.3 V industrial logic rails and brown-out tolerant down to 2.7 V.
Data Retention	20 years at 85 °C - validated for long-term deployment in uncooled industrial enclosures.
RTC Backup Current	0.45 µA (typ) - allows CR2032 coin cell to sustain RTC >10 years without recharge or replacement.
STORE Endurance	1 million cycles to QuantumTrap - supports daily power-cycle logging for >2,700 years of field operation.
Square Wave Outputs	1 Hz / 512 Hz / 4.096 kHz / 32.768 kHz - selectable via register for system timing reference or low-power wake-up signaling.

Pinout & Package

Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).

Pin/Terminal	Circuit Role	Design Meaning
VCC	Power supply input	Primary 2.7–3.6 V supply for nvSRAM and RTC logic; decoupling required within 10 mm.
VSS	Ground reference	Digital ground return path shared by memory and RTC; separate analog ground not required.
SDA	I²C bidirectional data	Open-drain I/O requiring external pull-up; supports all four I²C speed modes up to 3.4 MHz.
SCL	I²C clock input	Master-generated clock; rise/fall time constraints apply per I²C bus capacitance and speed mode.
WP	Hardware write protect	Active-low enable; internally pulled LOW - left floating for default unprotected operation.
HSB	Hardware STORE busy indicator	Drives LOW during STORE/RECALL; pulsed HIGH post-operation; also accepts external LOW pulse to trigger Hardware STORE.
VCAP	AutoStore capacitor supply	Connects to external capacitor (≥4.7 µF) to sustain STORE during VCC dropout; never connect to GND.
INT/SQW	Configurable interrupt/square wave	Programmable as active-HIGH push-pull or open-drain output; sources alarm, watchdog, or calibration signals.
XIN / XOUT	RTC crystal interface	Differential inputs for 32.768 kHz tuning fork crystal; requires load capacitors per crystal spec.
VRTCcap / VRTCbat	RTC backup source select	Exclusive use: VRTCcap for supercapacitor backup; VRTCbat for lithium coin cell - only one connected.

Key Features

Feature	Design Value
QuantumTrap nonvolatile storage	Enables infinite SRAM read/write cycles with 1M STORE endurance and 20-year data retention at 85 °C.
Triple-mode STORE/RECALL control	Supports automatic (power-loss), software (I²C command), and hardware (HSB pin) initiation - ensures deterministic data persistence across failure modes.
Configurable RTC interrupt outputs	INT/SQW pin delivers alarm, watchdog timeout, or power-fail events as programmable active-HIGH or open-drain signals - eliminates need for external interrupt logic.
Multi-granularity memory protection	Software block protection locks 1/4, 1/2, or entire 128 K × 8 array - prevents accidental overwrite of critical firmware or calibration tables.
Low-power sleep mode	8 µA standby current with I²C interface disabled - extends battery life in portable data acquisition systems between wake events.

Applications

Industrial Data Logger

Smart Energy Meter

Use Scenario: Continuous timestamped recording of sensor readings (temperature, pressure, voltage) during mains power interruption.

IC Role / Device Role / Timing Role: nvSRAM preserves volatile log buffer; RTC maintains accurate UTC time stamping during blackouts using VRTCbat backup.

Use Value: Eliminates need for external FRAM + discrete RTC, reducing BOM count and PCB area while guaranteeing synchronized time-stamped data recovery after >10-year battery life.

Use Scenario: Tamper-resistant energy consumption tracking with secure time-stamped billing intervals and power-fail event capture.

IC Role / Device Role / Timing Role: Stores metering registers and tariff schedules in protected nvSRAM; RTC drives billing cycle interrupts and detects grid outage duration.

Use Value: Achieves Class 0.5 accuracy compliance via 1 ppm RTC calibration support and prevents data loss during brownouts using AutoStore with ≥4.7 µF VCAP.

PLC I/O Module

Medical Diagnostic Recorder

Use Scenario: Storing configuration parameters and last-known I/O states during unexpected controller reset or power loss.

IC Role / Device Role / Timing Role: Acts as nonvolatile configuration store with hardware STORE triggered by PLC power-monitor circuit via HSB pin.

Use Value: Enables <100 ms state recovery on reboot - meets IEC 61131-2 reaction time requirements without FPGA-based NVM or external EEPROM.

Use Scenario: Capturing ECG waveform snapshots with precise onset timing during arrhythmia detection events.

IC Role / Device Role / Timing Role: Buffers raw waveform data in SRAM; RTC triggers INT/SQW interrupt on alarm match to initiate snapshot capture and timestamping.

Use Value: Guarantees sub-millisecond timestamp alignment between analog front-end sampling and digital storage - critical for FDA 510(k) waveform traceability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STK14CA8-NL35I	Parallel interface (32-bit), no integrated RTC, 1 Mbit nvSRAM only; requires external RTC and level-shifting for 3.3 V systems.	Lacks single-chip time-stamping; demands additional ICs and layout space for RTC + crystal + backup power management.	Select when legacy parallel bus architecture exists and RTC functionality is already implemented elsewhere.
DS1347Z+	Standalone RTC with trickle-charge controller and 56-byte NV RAM; no 1-Mbit nvSRAM, no I²C high-speed mode support.	Insufficient memory for buffered logging; requires companion SRAM + nonvolatile storage solution for full data retention.	Select only for pure RTC functions where memory size <128 bytes suffices and I²C speed >400 kHz is unnecessary.

Compared with STK14CA8-NL35I and DS1347Z+, CY14B101I uniquely integrates high-speed I²C nvSRAM and full-featured RTC in one SOIC package - eliminating inter-IC timing skew, reducing component count by ≥3, and enabling synchronized timestamped storage without external glue logic.

Availability

CY14B101I is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, PLC I/O modules, and medical diagnostic recorders requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.

Supply support for CY14B101I 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.

CY14B101I belongs to Infineon's legacy Cypress nvSRAM product line, designed specifically for systems demanding deterministic nonvolatile data retention with integrated timekeeping - targeting industrial automation, utility metering, and mission-critical edge instrumentation.

FAQ

What is the maximum I²C clock frequency supported by CY14B101I?

The CY14B101I supports I²C High-Speed mode up to 3.4 MHz, in addition to Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) modes. All modes use the same physical interface and slave address scheme, but AC timing parameters vary per mode - refer to Table 33 (AC Switching Characteristics) in datasheet Rev. *M for setup/hold times and pulse widths specific to each speed.

Can VRTCcap and VRTCbat be used simultaneously for RTC backup?

No. VRTCcap and VRTCbat are mutually exclusive backup sources. Only one may be connected: VRTCcap for supercapacitor-based backup (low leakage, limited runtime), or VRTCbat for lithium coin cell (longer runtime, higher energy density). Connecting both violates absolute maximum ratings and risks damage to internal RTC power-switching circuitry.

How does AutoStore function during a gradual VCC droop?

AutoStore activates when VCC falls below the internal voltage monitor threshold (typically ~2.5 V for CY14B101I). The device uses charge stored on the external VCAP capacitor to complete STORE within 20 ms. Gradual droop must cross this threshold cleanly; if VCC lingers near threshold, AutoStore may not trigger reliably - design requires VCAP ≥4.7 µF and fast enough droop rate (>1 V/ms) per datasheet Figure 9.

Is the 8-byte serial number factory-programmed and lockable?

Yes. The 8-byte serial number is factory-programmed, unique per unit, and can be permanently locked via I²C command to prevent overwriting. Once locked, the serial number remains readable but cannot be modified - supporting traceability and anti-counterfeiting in regulated industries such as medical and utility metering.

CY14B101I-SFXIT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: NVSRAM

Technology:: NVSRAM (Non-Volatile SRAM)

Memory Size:: 1Mbit

Memory Organization:: 128K x 8

Memory Interface:: I2C

Clock Frequency:: 3.4 MHz

Write Cycle Time - Word, Page:: -

Access Time:: -

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

CY14B101I-SFXIT FAQ

1.How can I place an order for CY14B101I-SFXIT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY14B101I-SFXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CY14B101I-SFXIT reliable?

The price and inventory of CY14B101I-SFXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B101I-SFXIT is usually 5 days.

3.What payment methods are accepted for CY14B101I-SFXIT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B101I-SFXIT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY14B101I-SFXIT?

CY14B101I-SFXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY14B101I-SFXIT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CY14B101I-SFXIT?

For technical support, including CY14B101I-SFXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B101I-SFXIT requirements.

6.How does Aetrix verify that CY14B101I-SFXIT is sourced from the original manufacturer or authorized distributors?

All CY14B101I-SFXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY14B101I-SFXIT meets industry standards.

7.What is the process for return or replacement of CY14B101I-SFXIT?

All CY14B101I-SFXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14B101I-SFXIT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CY14B101I-SFXIT part is unused and in its original packaging.

Return procedure for CY14B101I-SFXIT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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