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Infineon Technologies CY15B108QN-40SXIT
- Part No.:
- CY15B108QN-40SXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
CY15B108QN-40SXIT.pdf
- Description:
- IC FRAM 8MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
CY15B108QN-40SXIT 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. It serves as a non-volatile memory replacement for serial EEPROM/flash in data-logging systems requiring instant write, zero latency, and high reliability.
For engineers reviewing the CY15B108QN-40SXIT datasheet, CY15B108QN-40SXIT pinout, CY15B108QN-40SXIT application, or CY15B108QN-40SXIT equivalent, this page delivers verified technical context, real-world timing behavior, endurance-backed write performance, and drop-in SPI interface compatibility - critical for industrial control, metering, and edge sensor node designs where write cycle count and power-down safety are design constraints.
Technical Context
The CY15B108QN-40SXIT implements a true SPI slave interface compliant with modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), supporting continuous read/write at full 40 MHz without polling or erase cycles. Its F-RAM core enables byte-level writes with zero write latency - data is committed immediately after each byte transfer, eliminating the 1–100 ms delays typical of flash/EEPROM.
It integrates a non-volatile status register with WPEN bit control, hardware write protection via the active-low WP pin, software block protection (1/4, 1/2, or full array), and a dedicated 256-byte special sector that survives up to three reflow soldering cycles - enabling secure boot code or calibration storage independent of main array wear.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory density | 8 Mb (1024K × 8 bits); supports full byte-addressable access without page/sector management overhead. |
| SPI max frequency | 40 MHz; enables 4 MB/s sustained write throughput - 40× faster than typical 1 MHz EEPROM writes. |
| Endurance | 10¹⁵ read/write cycles; eliminates field failure risk from frequent logging (e.g., 100 writes/sec → >300 years of operation). |
| Data retention | 151 years at +85°C; validated per JEDEC JESD22-A117, enabling unpowered storage in sealed industrial enclosures. |
| Supply voltage | 1.8 V to 3.6 V; compatible with 1.8 V, 2.5 V, and 3.3 V microcontroller I/O domains without level shifters. |
| Standby current | 3.5 µA (typ); enables multi-year battery life in wireless sensor nodes during sleep intervals. |
| Deep power-down | 0.90 µA (typ); maintains state while reducing system quiescent load below MCU RTC domain leakage. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), 150 mil width, RoHS-compliant, industrial-grade moisture sensitivity level (MSL 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select input | Active-low enable; device enters standby and tri-states SO when HIGH - essential for multi-device SPI bus arbitration. |
| SCK | Serial clock input | Synchronizes all I/O; rising edge latches SI, falling edge drives SO - supports clock stretching and pause between bytes. |
| SI | Serial input | Accepts opcodes, addresses, and write data; must be driven to valid logic level even during idle to meet IDD specs. |
| SO | Serial output | Drives read data only during active read commands; tristated otherwise - enables shared bus with pull-up/pull-down control. |
| WP | Write protect input | Hardware lock for status register writes when WPEN = 1; must be tied to VDD if unused to prevent accidental protection. |
| 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 - simplifies power sequencing. |
| DNU | Do-not-use terminal | No internal connection; must remain floating or tied to VDD - not a test pad or reserved function. |
Key Features
| Feature | Design Value |
|---|---|
| Instant non-volatile write | Zero write latency - data stored atomically on byte receipt; no hidden background erase or program operations. |
| Dedicated 256-byte special sector | Retains content through ≥3 reflow cycles (JEDEC J-STD-020); ideal for factory-programmed calibration or security keys. |
| Multi-layer write protection | Combines hardware (WP pin), software disable (WRDI), and configurable block locks - prevents accidental overwrites in field firmware. |
| Unique device ID + serial number | Read-only 64-bit manufacturer/product ID + writable 8-byte serial register - enables board-level traceability and anti-cloning. |
| Low-power deep sleep mode | 0.90 µA typical current draw with retained memory state - extends coin-cell lifetime beyond 10 years in maintenance-free sensors. |
Applications
| Smart Energy Metering | Industrial PLC Data Logging |
|---|---|
|
Use Scenario: Storing tariff schedules, consumption timestamps, and tamper-event logs every 1–5 seconds under mains power interruption. IC Role / Device Role / Timing Role: Non-volatile scratchpad memory interfacing directly to ARM Cortex-M7 MCU SPI port with deterministic sub-microsecond write commit. Use Value: Eliminates capacitor-backed SRAM or wear-limited EEPROM; guarantees 10+ years of daily 86,400 writes without degradation. |
Use Scenario: Capturing sensor inputs (temperature, pressure, vibration) during transient faults in motor control cabinets with ambient temps up to +85°C. IC Role / Device Role / Timing Role: High-reliability buffer storing pre-fault snapshots before watchdog-triggered reset - accessed via SPI from dual-core RISC-V SoC. Use Value: Survives 151 years at +85°C; avoids data loss during brownouts where flash write aborts would corrupt last log entry. |
| Medical Wearable Sensor Nodes | Automotive Telematics Event Recorders |
|
Use Scenario: Recording ECG waveform segments and motion artifacts during 72-hour ambulatory monitoring powered by rechargeable Li-ion. IC Role / Device Role / Timing Role: Low-voltage (1.8 V) persistent memory co-located with ultra-low-power BLE SoC; writes triggered by motion-detection interrupt. Use Value: 3.5 µA standby current extends battery runtime; 10¹⁵ endurance supports lifetime firmware updates and clinical data archiving. |
Use Scenario: Storing crash-triggered CAN bus diagnostics, GPS coordinates, and accelerometer vectors in ADAS black-box modules. IC Role / Device Role / Timing Role: Fail-safe event logger synchronized to vehicle power-down sequence - retains last 1000 frames even after sudden ignition cutoff. Use Value: Instant write ensures no frame loss during 12 V battery disconnect; operates across –40°C to +85°C automotive under-hood thermal profile. |
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-40SXI | Same die, 8-pin UFLGA package (2.5 mm × 3.0 mm); 0.5 mm pitch; lower profile (0.4 mm height) vs SOIC (1.75 mm). | Used in space-constrained portable devices; requires fine-pitch PCB assembly and reflow profile validation. | Select for ultra-thin wearables or modules where board area < 10 mm² is critical - not recommended for manual prototyping. |
| FM25V05-SG | Cypress (now Infineon) 512 Kb F-RAM; 2.7–3.6 V only; 20 MHz max SPI; no special sector or serial number registers. | Limited to simpler logging tasks (e.g., single-parameter counters); lacks reflow-survivable sector and traceability features. | Choose only when density < 1 Mb suffices and industrial temp support is secondary - avoids over-spec'ing cost and complexity. |
Compared with CY15B108QSN-40SXI and FM25V05-SG, the CY15B108QN-40SXIT uniquely balances 8 Mb density, full industrial voltage/temperature range, reflow-hardened special sector, and traceable serial identity - making it the only option meeting simultaneous requirements for high-cycle telemetry, regulatory audit trails, and long-life embedded deployment.
Availability
CY15B108QN-40SXIT is available at Aetrix Electronics and suitable for smart metering, industrial PLC data buffering, and medical wearable sensor logging requiring stable component supply across extended product lifecycles.
Supply support for CY15B108QN-40SXIT 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, automotive MCUs, and high-reliability memory solutions, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q200.
The EXCELON™ LP F-RAM product line targets mission-critical data logging where write endurance, zero-latency persistence, and extended temperature operation outweigh cost-per-bit concerns - designed specifically for industrial, energy, and medical edge systems.
FAQ
Is CY15B108QN-40SXIT pin-compatible with standard SPI EEPROMs like AT25DF041A?
Yes - it uses identical 8-pin SOIC pinout (CS, SCK, SI, SO, WP, VSS, VDD, DNU) and supports standard SPI opcodes (0x02 Write, 0x03 Read, 0x06 WREN). No hardware redesign is needed; only firmware changes to remove polling loops and adjust timing margins due to zero-write-latency behavior.
Does the 256-byte special sector require separate addressing or command set?
Yes - it uses dedicated opcodes (0x77 for special sector write, 0x78 for read) and occupies address range 0xFFFC00–0xFFFCFF. Unlike main array, writes to this sector survive reflow cycles because its ferroelectric capacitors are fabricated with enhanced thermal stability - no additional configuration registers are needed.
What happens during power loss mid-write, and how is data integrity ensured?
F-RAM writes are inherently atomic and non-volatile at the bit level. If VDD drops below 1.7 V during a byte transfer, the partially written byte remains unaltered - no corruption or partial-write states occur. The device requires no internal charge pumps or high-voltage generation, eliminating failure modes common in flash/EEPROM during brownout.
Can the unique device ID be overwritten or disabled?
No - the 64-bit manufacturer/product ID is factory-laser-trimmed and read-only. The 8-byte serial number register is writable via opcode 0x1B but resides in a protected region requiring WREN + WRDI sequence. Once locked via status register bit SRWD, further writes are blocked until next power cycle - preventing runtime tampering.
CY15B108QN-40SXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- Excelon™-LP,F-RAM™
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 9 ns
- Voltage - Supply:
- 1.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
CY15B108QN-40SXIT FAQ
1.How can I place an order for CY15B108QN-40SXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY15B108QN-40SXIT 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-40SXIT reliable?
The price and inventory of CY15B108QN-40SXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY15B108QN-40SXIT is usually 5 days.
3.What payment methods are accepted for CY15B108QN-40SXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY15B108QN-40SXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY15B108QN-40SXIT?
CY15B108QN-40SXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY15B108QN-40SXIT 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-40SXIT?
For technical support, including CY15B108QN-40SXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY15B108QN-40SXIT requirements.
6.How does Aetrix verify that CY15B108QN-40SXIT is sourced from the original manufacturer or authorized distributors?
All CY15B108QN-40SXIT 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-40SXIT meets industry standards.
7.What is the process for return or replacement of CY15B108QN-40SXIT?
All CY15B108QN-40SXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY15B108QN-40SXIT, 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-40SXIT part is unused and in its original packaging.
Return procedure for CY15B108QN-40SXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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