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Infineon Technologies CY14B512I-SFXIT
- Part No.:
- CY14B512I-SFXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14B512I-SFXIT.pdf
- Description:
- IC NVSRAM 512KBIT I2C 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,941
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Product details
Overview
CY14B512I-SFXIT from Cypress Semiconductor is a 512-Kbit (64 K × 8) serial I²C nonvolatile SRAM with integrated real-time clock, 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 RTC backup current, and 20-year data retention at 85 °C.
For engineers reviewing the CY14B512I-SFXIT datasheet, CY14B512I-SFXIT pinout, CY14B512I-SFXIT application, or CY14B512I-SFXIT equivalent, key selection criteria include I²C speed support up to 3.4 MHz, dual backup options (capacitor or battery for RTC), hardware STORE/RECALL via HSB pin, and software-configurable square wave output (1 Hz to 32.768 kHz).
Technical Context
This device integrates SRAM, QuantumTrap nonvolatile storage, and a full-featured RTC in a single monolithic IC. The memory supports infinite SRAM read/write cycles and 1 million STORE cycles to nonvolatile elements, with automatic STORE triggered by power loss or explicit command.
The RTC subsystem includes alarm, watchdog timer, programmable square wave output, and backup power fail detection. It operates from either VRTCcap (capacitor) or VRTCbat (battery), drawing only 0.45 µA typical backup current while maintaining timekeeping accuracy across industrial temperature range (–40 °C to +85 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (64 K × 8) - provides sufficient capacity for firmware state snapshots and timestamped sensor logs in embedded control nodes. |
| I²C speed modes | 100 kHz / 400 kHz / 1 MHz / 3.4 MHz - enables flexible integration with legacy and high-speed microcontrollers without protocol translation. |
| STORE endurance | 1 million cycles to QuantumTrap - ensures reliable long-term operation in cyclic power-loss environments like smart meters. |
| Data retention | 20 years at 85 °C - guarantees archival integrity in thermally stressed industrial enclosures without refresh. |
| RTC backup current | 0.45 µA typical - allows >10-year runtime on a single CR2032 coin cell or extended hold-up with small tantalum capacitor. |
| Operating voltage | 2.7 V to 3.6 V - matches standard 3.3 V system rails and avoids level-shifting in mixed-voltage designs. |
| Square wave outputs | 1 Hz / 512 Hz / 4096 Hz / 32.768 kHz - supplies precise timing references for MCU wake-up, sampling clocks, or calibration signals. |
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 |
|---|---|---|
| SCL | I²C clock input | Accepts master-generated clock up to 3.4 MHz; open-drain requires external pull-up resistor. |
| SDA | I²C bidirectional data | Open-drain I/O; transmits/receives commands, memory data, RTC registers, and serial number. |
| WP | Hardware write protect | Active-low input; disables all memory writes when asserted; internally pulled low-can be left floating if unused. |
| A0–A2 | I²C slave address bits | Set 3-bit address offset (0x50–0x57); internally pulled low-default address 0x50 when unconnected. |
| HSB | Hardware STORE busy | Output indicates STORE in progress (LOW); input triggers Hardware STORE when pulled LOW externally. |
| VCAP | AutoStore capacitor supply | Connects external capacitor to sustain STORE during VCC dropout; must never be grounded. |
| VRTCcap / VRTCbat | RTC backup power source | Exclusive choice: capacitor (VCAP-capable) or battery (VRTCbat); both support continuous RTC operation during main power loss. |
| INT/SQW | Interrupt/square wave output | Configurable as alarm interrupt, watchdog timeout flag, or programmable frequency clock output (1 Hz–32.768 kHz). |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on power-down | Guarantees zero-data-loss memory persistence using internal capacitor energy-no host intervention required. |
| Power-Up RECALL | Restores last valid SRAM image automatically at boot, eliminating initialization delays and firmware recovery logic. |
| Software STORE/RECALL | Enables deterministic, application-controlled nonvolatile save/restore via I²C command-critical for transactional data integrity. |
| Programmable square wave | Provides four selectable frequencies (1 Hz to 32.768 kHz) directly from RTC block-replaces external clock generators. |
| 8-byte unique serial number | Factory-programmed, read-only identifier-supports device traceability, secure boot binding, and field firmware versioning. |
Applications
| Smart Energy Metering | Industrial PLC Data Logging |
|---|---|
Use Scenario: Continuous recording of kWh consumption, tariff periods, and tamper events with precise timestamps. IC Role / Device Role / Timing Role: nvSRAM stores metering registers; RTC provides accurate time-of-use stamps and calendar-based billing windows. Use Value: Maintains synchronized time and critical logs across repeated mains outages, meeting ANSI C12.1 and IEC 62056 compliance requirements. | Use Scenario: Capturing process variable history (temperature, pressure, valve position) during transient faults or maintenance cycles. IC Role / Device Role / Timing Role: Acts as fault-robust ring buffer with timestamped entries; HSB pin signals STORE completion to PLC CPU. Use Value: Enables post-fault diagnostics without external battery-backed RAM or complex power-fail circuitry. |
| Medical Infusion Pump Event History | Automotive Telematics Black Box |
Use Scenario: Storing dose delivery records, occlusion alarms, and operator actions with ISO 13485 audit trail requirements. IC Role / Device Role / Timing Role: Provides tamper-resistant, time-stamped memory with RTC alarm for missed maintenance intervals. Use Value: Meets FDA 21 CFR Part 11 electronic record integrity mandates via nonvolatile storage and traceable timestamps. | Use Scenario: Recording vehicle speed, brake status, GPS coordinates, and airbag deployment triggers before and after crash events. IC Role / Device Role / Timing Role: Serves as crash-triggered data capture buffer; INT/SQW asserts interrupt on impact detection to initiate STORE. Use Value: Survives vehicle power collapse during collision, preserving forensically valid, time-correlated incident data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM+RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-3LF35I | Parallel interface (not I²C); 256 Kbit; no integrated RTC; requires external crystal and backup power management. | Used in legacy industrial boards with parallel bus architecture; lacks time-stamping capability. | Select only when replacing existing parallel nvSRAM designs and RTC is implemented separately. |
| FM31L278-G | I²C interface; 256 Kbit FRAM + RTC; unlimited endurance; no STORE/RECALL latency; 2.0–5.5 V operation. | Better suited for high-write-cycle applications (e.g., sensor sampling at 100 Hz); lower power but smaller memory. | Prefer for write-intensive logging where STORE latency or cycle limits are unacceptable. |
Compared with STK14C88-3LF35I and FM31L278-G, CY14B512I-SFXIT uniquely balances large 512-Kbit I²C-accessible nvSRAM, integrated full-featured RTC, and deterministic AutoStore-making it optimal for new designs requiring time-aware, power-fail-resilient data storage without architectural trade-offs.
Availability
CY14B512I-SFXIT is available at Aetrix Electronics and suitable for smart metering, industrial PLC data logging, medical infusion pump event history, and automotive telematics black box applications requiring stable component supply and long-term lifecycle support.
Supply support for CY14B512I-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) is a U.S.-based semiconductor company specializing in embedded solutions, including PSoC, USB, memory, and timing products.
The CY14B series belongs to Cypress's nvSRAM+RTC product line, engineered specifically for mission-critical data retention in power-unstable environments-targeting utility, industrial automation, and medical equipment where timestamped reliability is non-negotiable.
FAQ
What is the function of the HSB pin?
The HSB (Hardware STORE Busy) pin serves dual roles: as an output, it goes LOW during active STORE operations to signal busy status to the host controller; as an input, pulling it LOW externally initiates a Hardware STORE. After completion, it returns HIGH via internal weak pull-up. This enables both status monitoring and deterministic nonvolatile save triggering independent of I²C traffic.
Can the RTC operate without external crystal?
No-the RTC requires an external 32.768 kHz crystal connected between Xin and Xout pins for timekeeping accuracy. The device does not include an internal oscillator for RTC; omitting the crystal disables RTC functionality entirely, though nvSRAM remains fully operational via I²C.
How does AutoStore differ from Software STORE?
AutoStore is fully autonomous: triggered solely by VCC falling below threshold, using energy from the VCAP capacitor to complete STORE without host involvement. Software STORE requires an explicit I²C command and occurs only when the device is powered and communicating-enabling application-controlled save points, such as after validated sensor readings or configuration changes.
Is the 8-byte serial number writable or locked?
The 8-byte serial number is factory-programmed and permanently locked; it cannot be rewritten or erased. It is accessible via dedicated I²C register reads and provides a unique, immutable identifier per unit-essential for device authentication, firmware binding, and regulatory traceability in medical and industrial deployments.
CY14B512I-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:
- 512Kbit
- Memory Organization:
- 64K 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
CY14B512I-SFXIT FAQ
1.How can I place an order for CY14B512I-SFXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B512I-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 CY14B512I-SFXIT reliable?
The price and inventory of CY14B512I-SFXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B512I-SFXIT is usually 5 days.
3.What payment methods are accepted for CY14B512I-SFXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B512I-SFXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B512I-SFXIT?
CY14B512I-SFXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B512I-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 CY14B512I-SFXIT?
For technical support, including CY14B512I-SFXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B512I-SFXIT requirements.
6.How does Aetrix verify that CY14B512I-SFXIT is sourced from the original manufacturer or authorized distributors?
All CY14B512I-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 CY14B512I-SFXIT meets industry standards.
7.What is the process for return or replacement of CY14B512I-SFXIT?
All CY14B512I-SFXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14B512I-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 CY14B512I-SFXIT part is unused and in its original packaging.
Return procedure for CY14B512I-SFXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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