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Infineon Technologies CY14B101I-SFXI
- Part No.:
- CY14B101I-SFXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14B101I-SFXI.pdf
- Description:
- IC NVSRAM 1MBIT I2C 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:971
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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, supporting AutoStore on power-loss via VCAP capacitor, Power-Up RECALL, and full RTC functionality including alarm, watchdog timer, and programmable square-wave output (1 Hz to 32.768 kHz). It operates across 2.7–3.6 V and is deployed in industrial metering systems requiring deterministic data retention during brownouts.
For engineers reviewing the CY14B101I datasheet, CY14B101I pinout, CY14B101I application, or CY14B101I equivalent, key selection criteria include I²C speed support up to 3.4 MHz, RTC backup current (0.45 µA typ), STORE endurance (1 million cycles), and hardware STORE/RECALL via HSB pin - all critical for fail-safe time-stamped logging in energy infrastructure controllers.
Technical Context
The device integrates QuantumTrap nonvolatile storage with standard SRAM, enabling infinite SRAM read/write cycles and deterministic STORE/RECALL transitions synchronized to power events or I²C commands. Its RTC subsystem includes independent counters, alarm registers, and interrupt generation tied to INT/SQW pin.
I²C interface supports Standard (100 kHz), Fast (400 kHz), Fast-Plus (1 MHz), and High-Speed (3.4 MHz) modes with zero-cycle-delay reads/writes. The memory slave and RTC slave share separate I²C sub-address spaces, accessed via distinct slave addresses and register maps defined in the control logic block.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 1 Mbit (128 K × 8) - provides sufficient buffer for timestamped event logs in smart meters without external memory expansion |
| I²C speed support | Up to 3.4 MHz - enables high-throughput configuration and log writes without CPU polling overhead |
| STORE endurance | 1 million cycles - guarantees reliable nonvolatile write lifetime over 10+ years of daily power cycling in utility equipment |
| RTC backup current | 0.45 µA typical - allows >5-year operation on a single CR2032 coin cell when VRTCbat is used |
| Operating voltage | 2.7 V to 3.6 V - matches standard 3.3 V industrial supply rails and tolerates ±10% regulation drift |
| Data retention | 20 years at 85 °C - ensures long-term integrity of calibration and firmware parameters in hot enclosures |
| Square wave outputs | 1 Hz / 512 Hz / 4096 Hz / 32.768 kHz - selectable for system timing reference, LED blink control, or oscillator calibration |
Pinout & Package
16-pin Small Outline Integrated Circuit (SOIC) package with 1.27 mm pitch, RoHS-compliant, industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | I²C clock input | Accepts master-generated clock up to 3.4 MHz; open-drain requires external pull-up |
| SDA | I²C bidirectional data | Open-drain I/O for memory and RTC register access; shares bus with other I²C peripherals |
| WP | Hardware write protect | Active-low input; internally pulled down - left unconnected for default unprotected operation |
| HSB | Hardware STORE busy indicator | Output goes LOW during STORE; input triggers immediate STORE when pulled LOW externally |
| VCAP | AutoStore capacitor supply | Connects to external capacitor (≥4.7 µF) to sustain STORE during VCC dropout (min. 10 ms hold-up) |
| VRTCcap / VRTCbat | RTC backup power source | Select one: capacitor (low-leakage) or battery (long-term); both isolated from main VCC domain |
| INT/SQW | Interrupt/square wave output | Configurable as active-HIGH push-pull or open-drain; delivers alarm, watchdog, or clock signals |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on power-down | Guaranteed STORE execution using VCAP capacitor without host intervention during brownout or shutdown |
| Power-Up RECALL | SRAM restored automatically at VCC ramp-up - eliminates boot-time initialization delay for time-critical systems |
| Independent RTC slave address | Enables concurrent access to memory and RTC registers without bus arbitration or register conflicts |
| Programmable square wave output | Four fixed frequencies (1 Hz to 32.768 kHz) usable as system tick, calibration reference, or UI feedback signal |
| Hardware STORE trigger via HSB | Allows deterministic, low-latency nonvolatile save on critical events (e.g., fault detection) independent of I²C bus state |
Applications
| Smart Electricity Meter | Industrial PLC Data Logger |
|---|---|
Use Scenario: Continuous energy consumption logging with timestamped events during grid instability. IC Role / Device Role / Timing Role: nvSRAM stores rolling 72-hour kWh data; RTC maintains accurate UTC time and triggers hourly log commits. Use Value: AutoStore preserves last valid reading during power loss; 20-year data retention meets utility regulatory archiving requirements. | Use Scenario: Capturing sensor readings and machine state changes in factory automation systems. IC Role / Device Role / Timing Role: Acts as local nonvolatile buffer and time-source for distributed I/O modules operating on 3.3 V rails. Use Value: Hardware STORE via HSB enables immediate save on emergency stop; 3.4 MHz I²C minimizes log write latency. |
| Medical Infusion Pump | Building Energy Management System |
Use Scenario: Recording dosage history, error events, and calibration data with tamper-resistant timestamps. IC Role / Device Role / Timing Role: Provides secure, battery-backed RTC and nonvolatile memory for FDA-required audit trails. Use Value: 0.45 µA RTC backup current extends CR2032 life beyond 5 years; WP pin prevents accidental overwrite of critical logs. | Use Scenario: Storing HVAC schedule changes, occupancy patterns, and energy usage metrics across seasonal cycles. IC Role / Device Role / Timing Role: Serves as time-aware memory node in BACnet/IP edge controllers with local decision logic. Use Value: Programmable square wave (32.768 kHz) synchronizes internal timers; 128 K × 8 capacity supports multi-year trend storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM+RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-NF5A | Parallel interface (not I²C); no integrated RTC; uses NVSRAM-only architecture with external crystal | Requires MCU GPIO expansion and separate RTC IC - increases BOM count and PCB area | Choose only if legacy parallel bus interface is mandated and RTC can be implemented externally |
| DS1347Z+ | Standalone RTC with trickle-charge lithium backup; no nvSRAM - memory must be added separately | Lacks nonvolatile memory; relies on external FRAM or EEPROM for event logging | Select when precise RTC accuracy (±2 ppm) is prioritized over integrated memory, and memory size is small (<64 KB) |
Compared with STK14CA8-NF5A and DS1347Z+, CY14B101I uniquely combines I²C-accessible 1-Mbit nvSRAM and full-featured RTC in one SOIC-16 package - reducing component count, simplifying layout, and guaranteeing atomic STORE/RECALL coordination between time and data domains.
Availability
CY14B101I is available at Aetrix Electronics and suitable for smart metering, industrial data logging, medical device audit trail, and building management systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS compliance.
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 German semiconductor leader specializing in power management, sensing, and connectivity solutions for automotive, industrial, and IoT applications.
CY14B101I belongs to Infineon's legacy Cypress nvSRAM product line, designed specifically for systems needing deterministic, low-power, time-stamped nonvolatile data capture without external memory or RTC components.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The datasheet specifies a minimum 4.7 µF tantalum or low-ESR ceramic capacitor on VCAP to ensure ≥10 ms hold-up time during VCC dropout. Using smaller values risks incomplete STORE operations under fast-ramp power loss conditions. Capacitor voltage rating must exceed maximum VCC by ≥20%.
Can the RTC operate independently while the nvSRAM is in sleep mode?
Yes - the RTC continues running in sleep mode (8 µA typical) as long as either VRTCcap or VRTCbat is powered. The nvSRAM core is disabled, but RTC registers remain accessible via I²C, and alarm/interrupt functions remain fully operational.
How does the HSB pin behave during a Software STORE command?
HSB is driven LOW only during Hardware STORE (triggered by pulling HSB low) and AutoStore (power-down). During Software STORE initiated via I²C command, HSB remains HIGH and unaffected - software status must be polled via the Status Register instead.
Is the CY14B101I compatible with 1.8 V I²C buses?
No - the device requires VCC between 2.7 V and 3.6 V and is not 1.8 V tolerant. Its I²C pins are specified for 3.3 V logic levels only. Interfacing with 1.8 V masters requires level-shifting circuitry compliant with I²C open-drain timing constraints.
CY14B101I-SFXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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-SFXI FAQ
1.How can I place an order for CY14B101I-SFXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B101I-SFXI 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-SFXI reliable?
The price and inventory of CY14B101I-SFXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B101I-SFXI is usually 5 days.
3.What payment methods are accepted for CY14B101I-SFXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B101I-SFXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B101I-SFXI?
CY14B101I-SFXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B101I-SFXI 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-SFXI?
For technical support, including CY14B101I-SFXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B101I-SFXI requirements.
6.How does Aetrix verify that CY14B101I-SFXI is sourced from the original manufacturer or authorized distributors?
All CY14B101I-SFXI 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-SFXI meets industry standards.
7.What is the process for return or replacement of CY14B101I-SFXI?
All CY14B101I-SFXI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B101I-SFXI, 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-SFXI part is unused and in its original packaging.
Return procedure for CY14B101I-SFXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY14B101I-SFXI Tags
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STMicroelectronics
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Microchip Technology
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Microchip Technology
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Microchip Technology
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STMicroelectronics
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Microchip Technology
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