Infineon Technologies CY15B102Q-SXM

Overview

CY15B102Q from Cypress Semiconductor Corporation is a 2-Mbit (256K × 8) serial SPI ferroelectric RAM (F-RAM) nonvolatile memory IC, designed for high-reliability data logging and real-time storage in military-grade systems. It delivers NoDelay™ writes at up to 25 MHz SPI clock speed, supports –55 °C to +125 °C operation, and guarantees 10¹³ read/write cycles with 121-year data retention.

For engineers reviewing the CY15B102Q datasheet, CY15B102Q pinout, CY15B102Q application, or CY15B102Q equivalent, key selection criteria include write endurance vs. serial flash/EEPROM, SPI mode 0/3 compatibility, hardware/software write protection, low-power sleep mode (20 µA), and AEC-Q006 compliance for harsh-environment embedded control.

Technical Context

The CY15B102Q implements a synchronous SPI slave interface with dual-mode support (CPOL/CPHA = 0/0 and 1/1), enabling direct drop-in replacement for legacy serial EEPROM and flash in existing microcontroller designs. Its internal F-RAM array eliminates erase-before-write overhead and polling delays, allowing immediate byte-level writes after each SPI transfer.

It integrates a nonvolatile 8-bit status register for configurable block protection (1/4, 1/2, or full array), hardware write protection via the active-low WP pin, and HOLD functionality for bus arbitration. All timing and reliability specifications-including 5 mA active current at 25 MHz and 750 µA standby-are fully characterized across the military temperature range.

Key Specifications

Pinout & Package

8-pin small outline integrated circuit (SOIC) package with standard footprint and lead finish compliant with RoHS and AEC-Q006.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V20A and AT25DF021, the CY15B102Q uniquely combines military-grade temperature operation, AEC-Q006 qualification, and true zero-latency writes-making it the sole option for mission-critical, high-write-rate applications where reliability cannot be compromised.

Availability

CY15B102Q is available at Aetrix Electronics and suitable for avionics data logging, military vehicle telematics, and industrial PLC configuration storage requiring stable component supply under extended temperature and long lifecycle commitments.

Supply support for CY15B102Q 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 Corporation, now part of Infineon Technologies, designs high-performance, reliable semiconductor solutions for automotive, industrial, and aerospace markets.

The CY15B102Q belongs to Cypress's military-grade F-RAM product line, engineered specifically for applications demanding deterministic write performance, extreme endurance, and guaranteed data retention in harsh operational environments.

FAQ

Is the CY15B102Q pin-compatible with standard SPI EEPROMs like the AT25DF021?

Yes, the CY15B102Q uses an 8-pin SOIC package with identical pin assignments (CS, SCK, SI, SO, WP, HOLD, VDD, VSS) and supports the same SPI opcodes for read, write, and status operations. It requires no PCB redesign when replacing serial flash or EEPROM in existing layouts.

Does the CY15B102Q require external circuitry for write protection?

No. The device integrates dual-layer write protection: hardware-level control via the active-low WP pin (which locks status register writes when WPEN = 1), and software-configurable block protection using BP0/BP1 bits in the status register-no external components needed.

Can the CY15B102Q operate reliably at 2.0 V and 125 °C simultaneously?

Yes. All electrical specifications-including 25 MHz max SPI clock, 5 mA active current, and 10¹³ endurance-are fully guaranteed across the entire military temperature range (–55 °C to +125 °C) and full voltage range (2.0 V to 3.6 V), per datasheet Rev. *A.

What happens to ongoing SPI transactions when the HOLD pin is asserted?

When HOLD is pulled LOW while SCK is LOW, the CY15B102Q suspends the current SPI operation (read, write, or status access) and holds internal state. SCK and CS transitions are ignored until HOLD returns HIGH, then the transaction resumes from the exact bit position where it paused.