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Infineon Technologies CY14B064I-SFXIT
- Part No.:
- CY14B064I-SFXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14B064I-SFXIT.pdf
- Description:
- IC NVSRAM 64KBIT I2C 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,044
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Product details
Overview
CY14B064I-SFXIT from Cypress Semiconductor is a 64-Kbit (8K × 8) serial I²C nonvolatile SRAM with integrated real-time clock (RTC), designed for data logging and time-stamped event storage in industrial controllers and metering systems. It features AutoStore on power-down, Power-Up RECALL, 1 MHz Fast Mode Plus I²C interface, 0.45 µA typical RTC backup current, and operates across 2.7 V to 3.6 V.
For engineers reviewing the CY14B064I-SFXIT datasheet, CY14B064I-SFXIT pinout, CY14B064I-SFXIT application, or CY14B064I-SFXIT equivalent, key selection criteria include I²C speed mode support (up to 3.4 MHz), dual backup options (capacitor or battery for RTC), hardware STORE/RECALL via HSB pin, and software-controlled nvSRAM persistence with 1 million STORE cycles.
Technical Context
This monolithic IC integrates QuantumTrap-based nvSRAM and a full-featured RTC on a single die. The memory supports infinite SRAM read/write cycles and 1 million nonvolatile STORE cycles, with automatic data transfer between volatile SRAM and nonvolatile elements during power transitions.
The RTC includes programmable alarm, watchdog timer, square wave output (1 Hz / 512 Hz / 4.096 kHz / 32.768 kHz), and backup power fail detection. It accepts either capacitor (VCAP + VRTCcap) or battery (VRTCbat) backup, drawing only 0.45 µA typical in backup mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8K × 8), enabling direct byte-addressable storage without external address latching |
| I²C speed modes | 100 kHz / 400 kHz / 1 MHz / 3.4 MHz - supports legacy and high-speed host microcontrollers |
| STORE endurance | 1 million cycles to QuantumTrap cells - suitable for frequent power-cycle environments |
| RTC backup current | 0.45 µA typical - extends coin-cell life beyond 10 years at 25 °C |
| Operating voltage | 2.7 V to 3.6 V - compatible with 3.3 V system rails and industrial supply tolerances |
| Data retention | 20 years at 85 °C - validated for long-term deployment in uncooled enclosures |
| Square wave outputs | 1 Hz, 512 Hz, 4.096 kHz, or 32.768 kHz - selectable for timing reference or low-power wake-up signals |
Pinout & Package
Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | I²C clock input | Accepts up to 3.4 MHz clock; open-drain requires external pull-up |
| SDA | I²C bidirectional data | Open-drain I/O; shares bus with multiple slaves using A0–A2 address bits |
| WP | Hardware write protect | Active-low; internally pulled down - left floating for default unprotected operation |
| HSB | Hardware STORE busy | Output: LOW during STORE/RECALL; Input: pull LOW to trigger hardware STORE |
| VCAP | AutoStore capacitor supply | Connects to external capacitor (≥4.7 µF) to sustain STORE during VCC dropout |
| VRTCcap / VRTCbat | RTC backup power select | Exclusive use: capacitor backup (VCAP + VRTCcap) or battery (VRTCbat); not both |
| INT/SQW | Interrupt/square wave output | Programmable as alarm interrupt or calibrated square wave source |
| Xin / Xout | RTC crystal oscillator interface | Drives 32.768 kHz tuning-fork crystal; requires external load capacitors |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on power loss | Guarantees data persistence without host intervention using VCAP energy reserve |
| Software STORE/RECALL | Enables deterministic nonvolatile updates via I²C command - critical for firmware-triggered save points |
| RTC alarm & watchdog | Provides autonomous time-based event triggering and system reset capability independent of host MCU |
| Configurable square wave output | Delivers precise timing reference for external logic or low-power wake-up without additional oscillator |
| 8-byte serial number | Enables device-level traceability and unique identification in multi-unit deployments |
Applications
| Smart Energy Metering | Industrial PLC Data Logger |
|---|---|
Use Scenario: Captures cumulative kWh, tamper events, and voltage sags with timestamped records. IC Role / Device Role / Timing Role: nvSRAM stores metering data; RTC provides accurate UTC-aligned timestamps and calendar functions. Use Value: Eliminates need for separate RTC and EEPROM, reducing BOM count and PCB area while ensuring data integrity across brownouts. | Use Scenario: Logs sensor readings, fault codes, and operational states in programmable logic controllers during runtime and power interruptions. IC Role / Device Role / Timing Role: Acts as persistent scratchpad memory with synchronized time tagging for diagnostic traceability. Use Value: Enables post-failure analysis with precise timing context, supported by 20-year data retention at elevated ambient temperatures. |
| Medical Infusion Pump | Building Automation Controller |
Use Scenario: Records dosage history, error logs, and calibration events requiring regulatory audit trails. IC Role / Device Role / Timing Role: Provides FDA-compliant nonvolatile storage with verifiable timestamps and tamper-resistant serial number. Use Value: Meets IEC 62304 data retention requirements using certified QuantumTrap technology and RTC traceability. | Use Scenario: Stores HVAC schedules, occupancy patterns, and energy usage metrics across daily power cycles. IC Role / Device Role / Timing Role: Serves as time-aware configuration and telemetry buffer with scheduled alarm-driven wake-up. Use Value: Reduces standby power by >90% vs. MCU + discrete RTC + Flash solution, leveraging 8 µA sleep mode and RTC-driven interrupts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM+RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-NF55I | Parallel interface (not I²C); 5V-only operation; no integrated RTC | Requires external RTC and level-shifting; suited for legacy 5V industrial backplanes | Select only when migrating from parallel nvSRAM designs and RTC is already implemented separately |
| DS1347+AT24C512 | Discrete RTC + I²C EEPROM; no AutoStore; no hardware STORE/RECALL pin | Lacks seamless power-loss data capture; relies on host firmware for save coordination | Choose if cost sensitivity outweighs reliability requirements and host MCU can guarantee timely writes before power loss |
Compared with STK14CA8-NF55I and DS1347+AT24C512, CY14B064I-SFXIT uniquely delivers monolithic I²C nvSRAM+RTC with hardware-initiated STORE/RECALL, eliminating timing-critical firmware dependencies and reducing component count by two.
Availability
CY14B064I-SFXIT is available at Aetrix Electronics and suitable for smart metering, industrial data loggers, medical devices, and building automation systems requiring stable component supply, long-life data retention, and integrated timekeeping.
Supply support for CY14B064I-SFXIT 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
Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability mixed-signal ICs for industrial, automotive, and IoT applications, with emphasis on integration, low power, and functional safety.
CY14B064I belongs to Cypress's nvSRAM+RTC product line, engineered to replace discrete SRAM+EEPROM+RTC combinations in mission-critical systems where data integrity and time synchronization must survive unpredictable power loss.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore?
A minimum 4.7 µF tantalum or ceramic capacitor is required on VCAP to ensure sufficient energy for complete STORE during VCC dropout. Lower values risk incomplete transfers; derating to 10 µF is recommended for extended hold-up time or wide temperature ranges.
Can the RTC operate without an external crystal?
No - the RTC requires a 32.768 kHz tuning-fork crystal connected between Xin and Xout. Internal oscillators are not provided; crystal load capacitance must match manufacturer specifications (typically 12.5 pF).
How does the HSB pin function during a Software STORE command?
HSB goes LOW during execution of any STORE (hardware or software) and remains LOW until completion. After completion, it pulses HIGH briefly (tHHHD), then floats weakly HIGH - allowing host MCU to poll HSB for operation status without I²C traffic.
Is the 8-byte serial number writable or factory-programmed?
The 8-byte serial number is factory-programmed and permanently locked after initial shipment. It cannot be overwritten or erased; reading requires I²C access to the dedicated serial number register space with no write capability.
CY14B064I-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:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K 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
CY14B064I-SFXIT FAQ
1.How can I place an order for CY14B064I-SFXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B064I-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 CY14B064I-SFXIT reliable?
The price and inventory of CY14B064I-SFXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B064I-SFXIT is usually 5 days.
3.What payment methods are accepted for CY14B064I-SFXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B064I-SFXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B064I-SFXIT?
CY14B064I-SFXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B064I-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 CY14B064I-SFXIT?
For technical support, including CY14B064I-SFXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B064I-SFXIT requirements.
6.How does Aetrix verify that CY14B064I-SFXIT is sourced from the original manufacturer or authorized distributors?
All CY14B064I-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 CY14B064I-SFXIT meets industry standards.
7.What is the process for return or replacement of CY14B064I-SFXIT?
All CY14B064I-SFXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14B064I-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 CY14B064I-SFXIT part is unused and in its original packaging.
Return procedure for CY14B064I-SFXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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