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Infineon Technologies CY15B108QN-40SXI
- Part No.:
- CY15B108QN-40SXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
CY15B108QN-40SXI.pdf
- Description:
- IC FRAM 8MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
CY15B108QN from Infineon is an 8 Mb serial ferroelectric RAM (F-RAM) organized as 1024K × 8, operating at up to 40 MHz SPI clock, with 1.8 V–3.6 V supply, industrial temperature range (–40°C to +85°C), and 10¹⁵ read/write endurance - deployed in real-time data logging systems requiring deterministic non-volatile writes without write latency.
For engineers reviewing the CY15B108QN datasheet, CY15B108QN pinout, CY15B108QN application, or CY15B108QN equivalent, this page delivers verified package mapping (8-pin SOIC), SPI mode 0/3 compatibility, instant-write behavior, deep power-down current (0.1 µA), and hardware/software write protection architecture - all confirmed from Infineon's official Rev. *L datasheet (002-21761).
Technical Context
The CY15B108QN implements a true SPI slave interface with zero-write-latency operation: each byte written is committed immediately upon successful SI shift-in, eliminating polling and enabling deterministic timing-critical storage. Its F-RAM core replaces charge-based storage with polarization switching, delivering 151-year data retention without refresh or wear leveling logic.
It integrates a non-volatile status register, dedicated 256-byte special sector (survives three reflow cycles), Device ID/Manufacturer ID registers, and 8-byte user-writable serial number. Write protection is enforced via WP pin (hardware) and WRDI instruction plus block-level software lock (1/4, 1/2, or full array).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 8 Mb (1024K × 8 bits); enables compact firmware/data storage without external address latches. |
| SPI max frequency | 40 MHz; supports ≤25 ns clock period for high-throughput logging at >4 MB/s effective write rate. |
| Endurance | 10¹⁵ read/write cycles; eliminates field failure risk in high-frequency telemetry or sensor sampling applications. |
| Data retention | 151 years at +85°C; guarantees archival integrity without backup power or periodic refresh. |
| Supply voltage | 1.8 V–3.6 V; interoperable with 1.8 V, 2.5 V, and 3.3 V I/O domains without level shifters. |
| Deep power-down current | 0.1 µA (typ); extends battery life in always-on edge nodes during extended sleep intervals. |
| Operating temperature | –40°C to +85°C; qualified for industrial control cabinets, automotive body modules, and outdoor IoT enclosures. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount, standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select (active-low input) | Activates SPI interface and wakes device from standby; falling edge initiates opcode sequence. |
| SCK | Serial Clock (input) | Synchronizes all I/O; rising edge samples SI, falling edge drives SO; supports 0–40 MHz with interrupt tolerance. |
| SI | Serial Input (input) | Receives opcodes, addresses, and write data; must be driven to valid logic level to meet IDD specs. |
| SO | Serial Output (output) | Drives read data on falling SCK edge; tristated when not selected or during write operations. |
| WP | Write Protect (active-low input) | Hardware lock for status register writes when WPEN=1; must tie to VDD if unused. |
| VSS | Ground | Reference return path for all internal circuitry; requires low-impedance connection to system ground plane. |
| VDD | Power supply | Single 1.8–3.6 V rail powers logic and memory array; no separate VIO required. |
| DNU | Do Not Use | No internal connection; leave floating or tie to VDD per design guidelines - no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Instant non-volatile write | Zero write latency: data committed at bus speed - no polling, no timeout handling, no failed writes under power loss. |
| Dedicated 256-byte special sector | Retains calibration data or security keys across ≥3 reflow cycles - usable for factory-programmed board identity. |
| Multi-layer write protection | Combines hardware (WP pin), instruction-based disable (WRDI), and configurable block locks - prevents accidental overwrites in fielded systems. |
| Unique device identification | Factory-programmed 64-bit unique ID + 8-byte writable serial number - enables secure device binding and traceability. |
| Ultra-low deep power-down | 0.1 µA typical current draw - allows multi-year operation on coin-cell batteries in maintenance-free sensor nodes. |
Applications
| Industrial Data Logger | Smart Metering Endpoint |
|---|---|
Use Scenario: Continuous 100 Hz sensor sampling with timestamped event capture in unattended remote substations. IC Role / Device Role / Timing Role: Non-volatile buffer storing last 72 hours of raw ADC samples and fault logs before upload. Use Value: Eliminates flash wear-out and write-stall-induced data gaps during brownouts - ensures 100% capture integrity over 15+ year deployment. |
Use Scenario: Tamper-proof energy consumption recording in residential electricity meters with bi-directional grid feed-in. IC Role / Device Role / Timing Role: Secure, high-endurance storage for billing registers, tariff tables, and cryptographic keys. Use Value: Withstands >10¹⁴ write cycles per meter lifetime - avoids field replacement due to EEPROM exhaustion or flash corruption. |
| Automotive Body Control Module | Medical Diagnostic Handheld |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in 12 V vehicle platforms with wide thermal swing. IC Role / Device Role / Timing Role: Persistent configuration store retaining settings across ignition cycles and battery disconnects. Use Value: 151-year retention at +85°C ensures reliability in engine bay proximity; SOIC package withstands automotive reflow profiles. |
Use Scenario: Capturing time-synchronized ECG waveforms during portable diagnostics with intermittent USB charging. IC Role / Device Role / Timing Role: Low-power, instant-write buffer holding waveform segments until host transfer completes. Use Value: 0.1 µA hibernate current extends single-charge runtime; zero-latency writes prevent waveform clipping during critical arrhythmia events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-volatile serial memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY15B108QSN | Same die, 8-pin GQFN package (NRND status per datasheet); identical electrical specs but different thermal profile and soldering requirements. | Preferred for space-constrained PCBs where SOIC footprint is prohibitive; not recommended for new designs per Infineon. | Select only if legacy GQFN layout exists and rework to SOIC is cost-prohibitive. |
| FM25V05 | 512 Kb F-RAM (64K × 8), 40 MHz SPI, 2.0–3.6 V; lower density, same endurance and retention, but lacks special sector and unique ID. | Suitable for simpler control registers or small config stores where 8 Mb is excessive and serial number traceability is unnecessary. | Choose when memory budget <1 Mb and BOM simplification outweighs scalability and security features. |
Compared with CY15B108QN, CY15B108QSN offers identical functionality in a deprecated package, while FM25V05 trades density and advanced features for cost and footprint reduction - making CY15B108QN optimal for scalable, secure, high-write industrial systems.
Availability
CY15B108QN is available at Aetrix Electronics and suitable for industrial data loggers, smart metering endpoints, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and guaranteed RoHS compliance.
Supply support for CY15B108QN 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 non-volatile memory solutions for industrial, automotive, and IoT markets.
CY15B108QN belongs to the EXCELON™ LP F-RAM product line, engineered specifically for deterministic, high-endurance, low-power non-volatile storage in systems where flash or EEPROM latency and wear limitations compromise reliability.
FAQ
Is CY15B108QN pin-compatible with standard SPI EEPROMs or flash devices?
Yes - it uses industry-standard 8-pin SOIC with identical CS/SCK/SI/SO/WP/VSS/VDD pin assignments and SPI mode 0/3 compatibility. No PCB redesign is needed for drop-in replacement of serial EEPROMs like AT25DF041 or flash such as W25Q80, though firmware must disable polling loops due to zero-write-latency behavior.
Does the 256-byte special sector require special commands to access?
Yes - it is accessed using dedicated opcodes (0x77 for read, 0x76 for write) distinct from main array commands. This sector resides at fixed address 0xFF0000–0xFF00FF and retains data through ≥3 reflow cycles, making it ideal for factory-programmed calibration constants or security keys that must survive board assembly.
What happens if the WP pin is left floating?
Leaving WP floating violates the datasheet requirement and may cause unpredictable write protection behavior. The pin must be actively driven HIGH (tied to VDD) when not used, as an undriven WP can float LOW and inadvertently lock status register writes - preventing configuration changes or firmware updates.
How does CY15B108QN handle power loss during a write operation?
Unlike flash or EEPROM, CY15B108QN performs true atomic byte writes: each bit is stored instantly upon SI clocking. If power fails mid-transfer, only the incomplete byte is lost - no array corruption, no need for wear-leveling recovery, and no risk of bricking the device. Full data integrity is maintained for all previously completed transfers.
CY15B108QN-40SXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- Excelon™-Auto, F-RAM™
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FRAM
- Technology:
- FRAM (Ferroelectric RAM)
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
CY15B108QN-40SXI FAQ
1.How can I place an order for CY15B108QN-40SXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY15B108QN-40SXI 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 CY15B108QN-40SXI reliable?
The price and inventory of CY15B108QN-40SXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY15B108QN-40SXI is usually 5 days.
3.What payment methods are accepted for CY15B108QN-40SXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY15B108QN-40SXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY15B108QN-40SXI?
CY15B108QN-40SXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY15B108QN-40SXI 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 CY15B108QN-40SXI?
For technical support, including CY15B108QN-40SXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY15B108QN-40SXI requirements.
6.How does Aetrix verify that CY15B108QN-40SXI is sourced from the original manufacturer or authorized distributors?
All CY15B108QN-40SXI 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 CY15B108QN-40SXI meets industry standards.
7.What is the process for return or replacement of CY15B108QN-40SXI?
All CY15B108QN-40SXI units undergo pre-shipment inspection (PSI). If there is an issue with CY15B108QN-40SXI, 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 CY15B108QN-40SXI part is unused and in its original packaging.
Return procedure for CY15B108QN-40SXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY15B108QN-40SXI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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