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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY15B108QI-20BFXI

Name: CY15B108QI-20BFXI
Brand: Infineon Technologies
SKU: CY15B108QI-20BFXI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY15B108QI-20BFXI

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 8-UFLGA

Datasheet:: CY15B108QI-20BFXI.pdf

Description:: IC FRAM 8MBIT SPI 8UFLGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CY15B108QI-20BFXI from Infineon is an 8-Mbit serial ferroelectric RAM (F-RAM) organized as 1024K × 8, operating over SPI at up to 20 MHz with 1.8 V–3.6 V supply, 10¹⁵ write endurance, and 151-year data retention-used in industrial data loggers requiring instant nonvolatile writes without write delays.

For engineers reviewing the CY15B108QI-20BFXI datasheet, CY15B108QI-20BFXI pinout, CY15B108QI-20BFXI application, or CY15B108QI-20BFXI equivalent, key selection considerations include SPI mode 0/3 compatibility, hardware/software write protection, deep power-down current (0.90 µA), dedicated 256-byte special sector surviving three reflow cycles, and industrial temperature range (–40°C to +85°C).

Technical Context

The CY15B108QI-20BFXI implements a true SPI slave interface with zero-write-latency architecture: each byte written is committed immediately upon successful SPI transfer, eliminating polling and enabling deterministic timing for high-frequency data capture. Its ferroelectric memory core replaces charge-pump-based mechanisms, delivering consistent 20 MHz read/write performance across voltage and temperature.

It integrates dual-layer write protection-hardware via active-low WP pin (when WPEN=1) and software via WRDI instruction plus configurable block protection (1/4, 1/2, or full array)-and embeds immutable Device ID, programmable 8-byte serial number, and a dedicated 256-byte special sector with enhanced thermal survivability.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory density	8 Mbit (1024K × 8), enabling compact storage of firmware metadata or sensor history without external buffering
SPI clock frequency	Up to 20 MHz, supporting real-time logging at ≥2.5 MB/s sustained write throughput
Data retention	151 years at +85°C, eliminating periodic refresh or backup power requirements in sealed industrial systems
Write endurance	10¹⁵ cycles, supporting continuous 100 Hz logging for >300 years without wear-out
Deep power-down current	0.90 µA typical, allowing battery-powered nodes to operate >10 years on a single CR2032 cell
Supply voltage range	1.8 V to 3.6 V, compatible with Li-ion, 3.3 V LDO, and wide-input PMIC outputs without level-shifting
Inrush current control	1.6 mA typical at power-up, preventing brownout in multi-rail systems during cold start

Pinout & Package

Package: 8-pin ultra-thin fine-pitch land grid array (UFLGA), 2.0 mm × 2.5 mm × 0.5 mm, RoHS-compliant, suitable for space-constrained industrial PCBs.

Pin/Terminal	Circuit Role	Design Meaning
CS	Active-low chip select input	Enables SPI communication only when asserted; places device in standby (3.5 µA) when deasserted
SCK	SPI clock input	Synchronizes all I/O; rising edge latches inputs, falling edge drives SO; supports 0–20 MHz with interruptible clock
SI	Serial data input	Receives opcodes, addresses, and write data; must be driven to valid logic level to meet IDD specs
SO	Serial data output	Drives read data on falling SCK edge; tristated during non-read operations
WP	Hardware write protect input	Blocks Status Register writes when WPEN=1; must tie to VDD if unused to prevent spurious protection
DNU	No-connect terminal	Not internally connected; may float or tie to VDD-no electrical function or signal path
VSS	Ground reference	System ground return; requires low-impedance connection to minimize noise coupling into F-RAM core
VDD	Power supply input	Supplies core and I/O; supports 1.8–3.6 V; internal regulation ensures stable operation across rail variation

Key Features

Feature	Design Value
Instant nonvolatile write	Zero latency: data committed immediately after SPI byte transfer-no wait states or polling required
Dedicated special sector	256-byte F-RAM region guaranteed to survive three standard reflow soldering cycles (260°C peak)
Multi-level write protection	Hardware (WP pin), software (WRDI), and configurable block lock (1/4, 1/2, full array) for secure firmware/data partitioning
Unique device identification	Immutable 16-bit manufacturer ID + 16-bit product ID + 64-bit unique ID + 64-bit user-programmable serial number
Ultra-low deep power-down	0.90 µA typical current enables >10-year battery life in wireless sensor nodes with infrequent wake-ups

Applications

Industrial Data Logger

Smart Meter Firmware Storage

Use Scenario: Continuous timestamped sensor sampling (e.g., temperature, pressure) at 100 Hz in oil-field monitoring equipment.

IC Role / Device Role / Timing Role: Nonvolatile scratchpad storing raw samples before batch upload; acts as write-through buffer with deterministic commit timing.

Use Value: Eliminates flash wear leveling overhead and guarantees no data loss during power interruption due to zero-write-latency architecture.

Use Scenario: Storing tariff tables, calibration coefficients, and event logs in ANSI C12.22-compliant electricity meters.

IC Role / Device Role / Timing Role: Secure configuration store with hardware WP pin tied to meter tamper-detection circuitry.

Use Value: Enables field updates without risk of corruption during brownouts, leveraging 10¹⁵ endurance for lifetime recalibration cycles.

Medical Diagnostic Device

PLC I/O Module Configuration

Use Scenario: Capturing ECG waveform segments during diagnostic boot-up sequences in portable ultrasound units.

IC Role / Device Role / Timing Role: High-speed circular buffer for pre-trigger waveform capture; retains last 30 seconds of analog data.

Use Value: Achieves sub-millisecond write response using 20 MHz SPI, avoiding DRAM backup capacitors and associated BOM cost.

Use Scenario: Storing channel-specific gain/offset calibration values and safety watchdog parameters in DIN-rail mounted I/O modules.

IC Role / Device Role / Timing Role: Trusted configuration vault accessed only during module initialization; protected by WP pin and status register lock.

Use Value: Prevents accidental overwrite during hot-swap events using hardware-enforced write disable independent of firmware state.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial nonvolatile memory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY15B108QN-20BFXI	Same die, 8-pin SOIC package (5.0 mm × 4.0 mm); no UFLGA footprint compatibility	Better suited for prototyping or through-hole legacy designs; lacks thermal survivability of UFLGA special sector	Select when board rework or hand-soldering is required; avoid for high-density automated assembly.
FM25V05-G	Cypress (Infineon) 512 Kbit F-RAM; half density, same 20 MHz SPI, but no special sector or serial number registers	Limited to simpler configurations where <1 Mbyte nonvolatile storage suffices and reflow survivability is not critical	Choose for cost-sensitive designs with lower capacity needs and no requirement for unique device ID or triple-reflow tolerance.

Compared with CY15B108QN-20BFXI and FM25V05-G, the CY15B108QI-20BFXI uniquely combines 8-Mbit density, UFLGA packaging for miniaturization, triple-reflow-capable special sector, and full 64-bit serial number support-making it optimal for next-generation industrial edge nodes requiring long-term reliability and compact form factor.

Availability

CY15B108QI-20BFXI is available at Aetrix Electronics and suitable for industrial data loggers, smart meter firmware storage, medical diagnostic devices, and PLC I/O module configuration requiring stable component supply across extended product lifecycles.

Supply support for CY15B108QI-20BFXI 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 memory solutions for automotive, industrial, and IoT applications.

The EXCELON™ LP F-RAM product line delivers instant-write, high-endurance nonvolatile memory targeting applications where flash/EEPROM limitations-write latency, endurance fatigue, and power spikes-compromise system reliability.

FAQ

Is CY15B108QI-20BFXI pin-compatible with standard SPI EEPROMs or flash devices?

No. While it uses the same 8-pin SPI pinout (CS, SCK, SI, SO, WP, VSS, VDD, DNU), the DNU pin is unconnected and must not be used as a functional signal. Unlike EEPROMs, it lacks HOLD pin functionality and requires no dummy clocks or address byte padding for reads-its command set and timing are F-RAM-specific.

Does the 256-byte special sector require separate addressing or commands?

Yes. The special sector resides at fixed addresses 0xFF000–0xFF0FF and is accessed using dedicated opcodes (0x77 for read, 0x76 for write) distinct from main array commands. It supports individual byte writes and retains data integrity across three JEDEC J-STD-020D reflow cycles without degradation.

How does inrush current control benefit system design?

The integrated inrush current limiter caps peak startup current at 1.6 mA typical, preventing voltage droop on shared 3.3 V rails that could reset microcontrollers or disrupt analog sensors. This eliminates need for external soft-start circuits or oversized bulk capacitance in space-constrained industrial modules.

Can the serial number be rewritten multiple times during field operation?

Yes. The 8-byte serial number register is writable via opcode 0x1B and supports unlimited writes-unlike flash-based serial numbers limited by erase cycles. Each write takes ≤100 µs, and the register retains values across power cycles and temperature extremes per the 151-year retention spec.

CY15B108QI-20BFXI Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-UFLGA

Packaging:: Tray

Product Status:: Active

Programmable:: -

Memory Type:: Non-Volatile

Memory Format:: FRAM

Technology:: FRAM (Ferroelectric RAM)

Memory Size:: 8Mbit

Memory Organization:: 1M x 8

Memory Interface:: SPI

Clock Frequency:: 20 MHz

Write Cycle Time - Word, Page:: -

Access Time:: 20 ns

Voltage - Supply:: 1.8V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-UFLGA (3.28x3.23)

CY15B108QI-20BFXI FAQ

1.How can I place an order for CY15B108QI-20BFXI through Aetrix?

Please submit a Request for Quotation (RFQ) for CY15B108QI-20BFXI 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 CY15B108QI-20BFXI reliable?

The price and inventory of CY15B108QI-20BFXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY15B108QI-20BFXI is usually 5 days.

3.What payment methods are accepted for CY15B108QI-20BFXI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY15B108QI-20BFXI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY15B108QI-20BFXI?

CY15B108QI-20BFXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY15B108QI-20BFXI 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 CY15B108QI-20BFXI?

For technical support, including CY15B108QI-20BFXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY15B108QI-20BFXI requirements.

6.How does Aetrix verify that CY15B108QI-20BFXI is sourced from the original manufacturer or authorized distributors?

All CY15B108QI-20BFXI 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 CY15B108QI-20BFXI meets industry standards.

7.What is the process for return or replacement of CY15B108QI-20BFXI?

All CY15B108QI-20BFXI units undergo pre-shipment inspection (PSI). If there is an issue with CY15B108QI-20BFXI, 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 CY15B108QI-20BFXI part is unused and in its original packaging.

Return procedure for CY15B108QI-20BFXI:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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