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Infineon Technologies CY14B064PA-SFXI
- Part No.:
- CY14B064PA-SFXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14B064PA-SFXI.pdf
- Description:
- IC NVSRAM 64KBIT SPI 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:920
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Product details
Overview
CY14B064PA-SFXI from Infineon Technologies (formerly Cypress) is a 64-Kbit (8 K × 8) SPI nonvolatile SRAM with integrated real-time clock, AutoStore/RECALL functionality, and 40 MHz / 104 MHz dual-speed SPI interface. It operates from 2.7 V to 3.6 V, features QuantumTrap nonvolatile storage (1M STORE cycles, 20-year data retention at 85 °C), and supports RTC functions including alarm, watchdog timer, and programmable square wave output (1 Hz to 32.768 kHz). Used in industrial logging systems requiring deterministic power-loss data capture.
For engineers reviewing the CY14B064PA-SFXI datasheet, CY14B064PA-SFXI pinout, CY14B064PA-SFXI application, or CY14B064PA-SFXI equivalent, key selection criteria include VCC range compatibility (2.7–3.6 V), RTC backup current (0.45 µA typ), AutoStore capacitor support (VCAP), SPI mode 0/3 compliance, and hardware STORE/RECALL via HSB pin - all critical for embedded systems with brown-out resilience and time-stamped event recording.
Technical Context
The device integrates an 8 K × 8 SRAM array with parallel STORE/RECALL to QuantumTrap nonvolatile elements using SONOS technology, enabling infinite SRAM read/write cycles and deterministic data persistence on power loss. STORE is triggered automatically (via VCAP discharge), by SPI command, or by asserting HSB LOW; RECALL occurs at power-up or via SPI instruction.
RTC subsystem includes independent counters, alarm registers, watchdog timer, interrupt-capable INT/SQW pin, and dual backup options (capacitor on VRTCcap or battery on VRTCbat). Square wave output frequency is software-selectable among 1 Hz, 512 Hz, 4.096 kHz, and 32.768 kHz - supporting timing reference, system wake-up, or calibration signals without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8 K × 8) - provides byte-addressable nonvolatile storage matching legacy 8-bit microcontroller bus widths. |
| Interface | SPI (modes 0 and 3) - ensures interoperability with standard MCU SPI peripherals without custom clock polarity/phase configuration. |
| Max SPI speed | 40 MHz (zero-cycle-delay read/write); 104 MHz (fast read only) - enables sub-200 ns effective access time for high-throughput logging. |
| STORE endurance | 1 million cycles to QuantumTrap - guarantees ≥10 years of daily power-cycle logging at 274 STOREs/day. |
| Data retention | 20 years at +85 °C - meets extended-life requirements for sealed industrial controllers and metering endpoints. |
| RTC backup current | 0.45 µA typical - allows >10-year operation on a 0.1 F supercapacitor charged from VCC. |
| VCC range | 2.7 V to 3.6 V - matches standard 3.3 V logic rails and tolerates ±10% supply variation without reset or data corruption. |
Pinout & Package
16-pin SOIC (Small Outline Integrated Circuit) package, RoHS-compliant, 300 mil body width, gull-wing leads. Pin 1 marked by notch or dot; top view orientation per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable: drives device into standby (250 µA) when HIGH; required for SPI transaction initiation. |
| SCK | Serial clock input | Edge-triggered clock up to 104 MHz; rising edge latches SI, falling edge drives SO - defines timing budget for firmware SPI drivers. |
| SI | Serial input | Accepts all instructions (READ, WRITE, STORE, RDRTC, etc.) and data - single-wire command/data path simplifies PCB routing. |
| SO | Serial output | Drives read data, status, RTC registers, and serial number - open-drain capable; requires external pull-up for multi-drop configurations. |
| WP | Hardware write protect | LOW disables all STORE/RECALL and memory writes - used for field firmware lock during deployment or maintenance. |
| HSB | Hardware STORE busy I/O | Output: pulses LOW during STORE/RECALL; Input: LOW triggers immediate hardware STORE - enables fail-safe data capture without MCU intervention. |
| VCAP | AutoStore capacitor supply | Connects to 4.7 µF–100 µF tantalum/ceramic cap - supplies energy for full SRAM→QuantumTrap transfer during VCC collapse (tSTORE ≤ 20 ms). |
| INT/SQW | Interrupt/square wave output | Configurable as alarm interrupt (edge-triggered) or continuous square wave (1 Hz–32.768 kHz) - replaces external oscillator or interrupt controller. |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on power-down | Uses internal VCAP discharge detection to initiate STORE without MCU involvement - eliminates firmware dependency for crash-safe logging. |
| Power-up RECALL | Restores full 8 K × 8 memory image to SRAM within 15 ms of VCC stabilization - ensures zero-latency resume of time-critical control loops. |
| RTC with alarm & watchdog | Independent 32-bit counter, programmable alarm interrupt, and watchdog timeout (16 ms–131 s) - enables autonomous event scheduling and system health monitoring. |
| 104 MHz fast read mode | Reduces 8 K-byte sequential read time from ~1.6 ms (40 MHz) to ~0.62 ms - accelerates firmware boot-time configuration loading. |
| 8-byte unique serial number | Factory-programmed, read-only identifier accessible via RDSN - supports device traceability, secure provisioning, and license binding in production. |
Applications
| Industrial Data Logger | Smart Energy Meter |
|---|---|
Use Scenario: Continuous timestamped voltage/current sampling during grid disturbances, with guaranteed data preservation across uncontrolled power loss. IC Role / Device Role / Timing Role: Nonvolatile memory + RTC co-processor - stores sensor buffers and timestamps simultaneously using shared SPI bus and synchronized INT/SQW alarm interrupts. Use Value: Eliminates need for external FRAM + separate RTC IC, reducing BOM count by two components while maintaining 20-year data retention and sub-second timestamp accuracy. | Use Scenario: Tamper-proof energy consumption records with cryptographic signatures, retained through utility-side power cycling and battery replacement. IC Role / Device Role / Timing Role: Secure time-stamped storage engine - uses hardware WP and block protection to prevent unauthorized overwrite of billing intervals and RTC calibration data. Use Value: Meets ANSI C12.1 and IEC 62056 requirements for meter data integrity, leveraging 1M STORE cycles and 0.45 µA RTC backup to extend supercap lifetime beyond 15 years. |
| Medical Diagnostic Recorder | PLC I/O Module |
Use Scenario: Capturing ECG waveform snapshots during transient arrhythmia events, where power interruption must not erase diagnostic history. IC Role / Device Role / Timing Role: Fail-safe buffer memory - leverages AutoStore via VCAP to guarantee SRAM→QuantumTrap transfer within 20 ms of VCC drop below 2.5 V. Use Value: Achieves Class III medical device data persistence requirements without external power-fail detection circuitry or backup batteries. | Use Scenario: Storing I/O configuration, calibration coefficients, and fault logs in modular automation controllers subject to frequent field reprogramming and brownouts. IC Role / Device Role / Timing Role: Configuration and state retention manager - uses Software STORE/RECALL to persist settings across firmware updates and HSB-triggered STORE for emergency shutdown logs. Use Value: Enables zero-downtime field upgrades and deterministic recovery after undervoltage faults, reducing mean time to repair (MTTR) by eliminating manual configuration reload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM+RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-3A50I | Parallel interface (32-pin TSOP), 64 Kbit nvSRAM only - no integrated RTC or SPI; requires external crystal and interrupt logic. | Suitable for legacy 8-bit MPU designs with address/data bus; not viable for space-constrained SPI-based controllers. | Select only if migrating from existing parallel-nvSRAM platforms and adding discrete RTC is acceptable. |
| FM31L276-G | I²C interface, 64 Kbit FRAM + RTC; no AutoStore - relies on MCU-controlled save routines; FRAM endurance 10¹⁴ cycles but no power-loss autonomy. | Better for low-power sensor nodes with infrequent writes; lacks deterministic STORE on VCC collapse without firmware supervision. | Prefer when I²C bus is dominant and power-loss resilience is less critical than ultra-low active current (<1 µA). |
Compared with STK14C88-3A50I and FM31L276-G, CY14B064PA-SFXI uniquely delivers SPI-native, autonomous power-loss data capture with integrated RTC - reducing component count, PCB area, and firmware complexity in new 3.3 V industrial designs requiring guaranteed timestamped logging.
Availability
CY14B064PA-SFXI is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, medical diagnostic recorders, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant 16-pin SOIC packaging.
Supply support for CY14B064PA-SFXI 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.
CY14B064PA belongs to the Cypress nvSRAM product line, designed specifically for applications demanding deterministic, autonomous nonvolatile data retention with integrated timekeeping - eliminating external RTC and backup power management circuitry.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
A minimum of 4.7 µF tantalum or ceramic capacitor is required on VCAP to ensure full 8 K × 8 STORE completion within 20 ms during VCC collapse from 3.6 V to 2.0 V. Larger values (e.g., 22 µF) extend operational margin under higher temperature or aging conditions but do not reduce tSTORE below datasheet-specified limits.
Can the RTC operate independently while the nvSRAM is in deep sleep mode?
Yes. The RTC continues running in sleep mode (8 µA typical) as long as VRTCcap or VRTCbat is powered. The SLEEP instruction halts SPI interface and SRAM access but leaves RTC clocks, alarms, and INT/SQW generation fully functional - enabling wake-up on alarm without full device initialization.
How does hardware STORE differ from Software STORE in terms of timing and reliability?
Hardware STORE (HSB pin pulled LOW) initiates STORE immediately with <5 µs latency and completes autonomously, making it immune to MCU lockup or SPI bus contention. Software STORE requires valid SPI transaction overhead (~20 µs setup + instruction decode), introducing vulnerability during system instability - hence HSB is preferred for safety-critical power-loss capture.
Is the 8-byte serial number factory-programmed and permanently locked?
Yes. The 8-byte serial number is laser-trimmed during final test and stored in one-time-programmable (OTP) memory. It is readable via RDSN/FAST_RDSN instructions but cannot be modified, erased, or reprogrammed - ensuring permanent device identity for traceability, anti-counterfeiting, and secure boot binding.
CY14B064PA-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:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 40 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
CY14B064PA-SFXI FAQ
1.How can I place an order for CY14B064PA-SFXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B064PA-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 CY14B064PA-SFXI reliable?
The price and inventory of CY14B064PA-SFXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B064PA-SFXI is usually 5 days.
3.What payment methods are accepted for CY14B064PA-SFXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B064PA-SFXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B064PA-SFXI?
CY14B064PA-SFXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B064PA-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 CY14B064PA-SFXI?
For technical support, including CY14B064PA-SFXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B064PA-SFXI requirements.
6.How does Aetrix verify that CY14B064PA-SFXI is sourced from the original manufacturer or authorized distributors?
All CY14B064PA-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 CY14B064PA-SFXI meets industry standards.
7.What is the process for return or replacement of CY14B064PA-SFXI?
All CY14B064PA-SFXI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B064PA-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 CY14B064PA-SFXI part is unused and in its original packaging.
Return procedure for CY14B064PA-SFXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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