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Infineon Technologies FM25CL64B-GATR
- Part No.:
- FM25CL64B-GATR
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
FM25CL64B-GATR.pdf
- Description:
- IC FRAM 64KBIT SPI 16MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,201
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Product details
Overview
FM25CL64B-GATR from Cypress Semiconductor is a 64-Kbit (8K × 8) automotive-grade serial F-RAM with SPI interface, operating from 3.0 V to 3.6 V over –40 °C to +125 °C. It delivers NoDelay™ writes, 1013 read/write endurance, and 121-year data retention. Used in vehicle event data recorders for real-time crash parameter logging where write latency and cycle count are critical.
For engineers reviewing the FM25CL64B-GATR datasheet, FM25CL64B-GATR pinout, FM25CL64B-GATR application, or FM25CL64B-GATR equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware/software write protection, AEC-Q100 Grade 1 qualification, and absence of write polling overhead in safety-critical automotive control loops.
Technical Context
The FM25CL64B-GATR implements a ferroelectric memory array with zero-latency write execution-data commits immediately after each byte transfer without internal erase or program cycles. Its SPI slave logic supports dual modes (0 and 3), with inputs latched on SCK rising edge and outputs driven on falling edge.
Write protection is enforced via three independent mechanisms: hardware WP pin (active-low), software WREN/WRDI instructions, and configurable block protection (1/4, 1/2, or full array) controlled by the nonvolatile status register. The device contains no internal power management beyond POR circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8K × 8); supports byte-level random access without page boundaries or erase blocks. |
| Interface | SPI slave, modes 0 and 3; enables direct drop-in replacement for serial flash/EEPROM on existing microcontroller SPI ports. |
| Max Clock Frequency | 16 MHz; allows 2 MB/s sustained write throughput with no wait states or command overhead. |
| Endurance | 1013 read/write cycles; eliminates wear leveling firmware and extends functional lifetime in high-write-rate telemetry systems. |
| Data Retention | 121 years at +85 °C; ensures integrity of calibration data and fault logs across full vehicle service life without refresh. |
| Operating Voltage | 3.0 V to 3.6 V; matches automotive 3.3 V supply rails and avoids level-shifting in body control modules. |
| Temperature Range | –40 °C to +125 °C (AEC-Q100 Grade 1); qualified for under-hood and transmission control unit mounting locations. |
Pinout & Package
8-pin small outline integrated circuit (SOIC) package, RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; must fall before every opcode; places device in standby (6 μA) when HIGH. |
| SCK | Serial clock input | Synchronizes all I/O; rising edge latches SI, falling edge drives SO; supports 0–16 MHz with interruptible clock. |
| SI | Serial input | Receives opcodes, addresses, and write data; must be driven to valid logic level to meet IDD specs. |
| SO | Serial output | Drives read data during active transactions; tristated otherwise, including during HOLD assertion. |
| WP | Write protect input | Hardware lock for status register writes when WPEN = 1; must tie to VDD if unused. |
| HOLD | Bus hold input | Suspends ongoing operation when LOW (SCK must be LOW during transition); enables CPU task preemption. |
| VSS | Ground | System reference return path; required connection for stable operation and EMI control. |
| VDD | Power supply | 3.0–3.6 V nominal; powers internal logic and F-RAM array; no internal regulation or brown-out detection. |
Key Features
| Feature | Design Value |
|---|---|
| NoDelay™ write architecture | Eliminates write polling and timeout handling in firmware; enables deterministic 1-byte commit timing at bus speed. |
| 1013 endurance | Supports >27,000 writes/sec continuously for 10 years-sufficient for CAN bus message buffering in ADAS domain controllers. |
| Hardware + software write protection | Prevents accidental overwrites of critical calibration tables via dual-layer control (WP pin + status register bits). |
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at +125 °C ambient, meeting thermal requirements of engine control units and battery management systems. |
| Low-power standby | 6 μA typical current at +85 °C enables always-on logging in low-power vehicle sleep modes without battery drain. |
Applications
| Vehicle Event Data Recorder (VEDR) | Engine Control Unit (ECU) Calibration Storage |
|---|---|
Use Scenario: Captures real-time sensor and actuator data during crash events for regulatory compliance and forensic analysis. IC Role / Device Role / Timing Role: Nonvolatile buffer storing timestamped CAN frames and analog inputs with sub-millisecond write granularity. Use Value: No data loss due to power interruption during impact; 1013 endurance supports repeated crash testing without memory degradation. | Use Scenario: Stores adaptive fuel trim, ignition timing maps, and OBD-II fault codes updated during vehicle operation. IC Role / Device Role / Timing Role: High-reliability configuration memory accessed during engine start-up and runtime recalibration. Use Value: Eliminates EEPROM wear-out failures in fielded vehicles; 121-year retention preserves factory calibrations across 15+ year lifetimes. |
| Advanced Driver Assistance Systems (ADAS) Sensor Fusion Log | Electric Power Steering (EPS) Fault History Buffer |
Use Scenario: Records synchronized camera, radar, and IMU data during lane departure or automatic emergency braking events. IC Role / Device Role / Timing Role: Low-latency write buffer enabling burst capture at 1 kHz without dropped frames. Use Value: 16 MHz SPI bandwidth and zero-write-delay allow full utilization of microcontroller DMA channels for real-time streaming. | Use Scenario: Maintains rolling history of torque sensor anomalies, motor current spikes, and steering angle deviations for predictive maintenance. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile scratchpad supporting frequent background writes during driving cycles. Use Value: AEC-Q100 Grade 1 rating ensures reliable operation at under-hood temperatures up to +125 °C without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial nonvolatile memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MB85RS64V | 64 Kbit FRAM, 3.0–3.6 V, SPI, but rated only to +105 °C (AEC-Q100 Grade 2), no HOLD pin. | Limited to cabin-mounted modules; lacks suspend capability for time-critical interrupt handling. | Select when cost sensitivity outweighs under-hood temperature and HOLD functionality requirements. |
| AT25DF041A | 4 Mbit SPI flash, 2.7–3.6 V, requires 25 ms page programming, 100k endurance, no built-in write protection bits. | Needs external firmware wear leveling and polling; unsuitable for high-frequency logging. | Choose only for static firmware storage where write frequency is <100x/day and latency tolerance >10 ms. |
Compared with MB85RS64V and AT25DF041A, FM25CL64B-GATR uniquely combines AEC-Q100 Grade 1 qualification, hardware HOLD support, and true zero-delay writes-making it the sole option for safety-critical, high-write-rate automotive data logging where deterministic timing and extended temperature operation are mandatory.
Availability
FM25CL64B-GATR is available at Aetrix Electronics and suitable for vehicle event data recorders, engine control unit calibration storage, and advanced driver assistance systems requiring stable component supply across extended automotive product lifecycles.
Supply support for FM25CL64B-GATR 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 semiconductor solutions for automotive, industrial, and IoT applications, with focus on memory, PSoC, and connectivity products.
The FM25CL64B belongs to Cypress's automotive F-RAM product line, engineered specifically for zero-latency, high-endurance nonvolatile data logging in harsh-temperature automotive subsystems.
FAQ
Is FM25CL64B-GATR pin-compatible with standard SPI EEPROMs like AT25xxx series?
Yes-FM25CL64B-GATR uses an industry-standard 8-pin SOIC package with identical pin assignments (CS, SCK, SI, SO, WP, HOLD, VDD, VSS) and supports SPI modes 0 and 3. It requires no PCB redesign when replacing serial EEPROMs, though firmware must disable write polling due to NoDelay™ operation.
Does FM25CL64B-GATR require external voltage regulation or decoupling capacitors?
Yes-it mandates a 0.1 µF ceramic decoupling capacitor between VDD and VSS, placed within 5 mm of the pins, per datasheet Section 12. No internal voltage regulation exists, so input must remain within 3.0–3.6 V at all times; operation outside this range risks data corruption or latch-up.
How does the HOLD pin function during an active write operation?
When HOLD is pulled LOW while SCK is LOW, the FM25CL64B suspends the current transaction (read or write) and tri-states SO. SCK and CS are ignored until HOLD returns HIGH, then the operation resumes from the exact bit position-enabling deterministic CPU task preemption without data loss or bus contention.
Can FM25CL64B-GATR be used in systems powered by 5 V microcontrollers?
No-it is strictly a 3.3 V device with absolute maximum VDD of 3.6 V. Interfacing with 5 V logic requires level translation on CS, SCK, SI, SO, WP, and HOLD lines; direct connection risks permanent damage. Cypress recommends TXS0108E or similar bidirectional translators for mixed-voltage SPI buses.
FM25CL64B-GATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- F-RAM™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FRAM
- Technology:
- FRAM (Ferroelectric RAM)
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 16 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
FM25CL64B-GATR FAQ
1.How can I place an order for FM25CL64B-GATR through Aetrix?
Please submit a Request for Quotation (RFQ) for FM25CL64B-GATR 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 FM25CL64B-GATR reliable?
The price and inventory of FM25CL64B-GATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FM25CL64B-GATR is usually 5 days.
3.What payment methods are accepted for FM25CL64B-GATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FM25CL64B-GATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FM25CL64B-GATR?
FM25CL64B-GATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FM25CL64B-GATR 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 FM25CL64B-GATR?
For technical support, including FM25CL64B-GATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FM25CL64B-GATR requirements.
6.How does Aetrix verify that FM25CL64B-GATR is sourced from the original manufacturer or authorized distributors?
All FM25CL64B-GATR 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 FM25CL64B-GATR meets industry standards.
7.What is the process for return or replacement of FM25CL64B-GATR?
All FM25CL64B-GATR units undergo pre-shipment inspection (PSI). If there is an issue with FM25CL64B-GATR, 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 FM25CL64B-GATR part is unused and in its original packaging.
Return procedure for FM25CL64B-GATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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