Cypress Semiconductor Corp CY15B064Q-SXA

Overview

CY15B064Q-SXA from Cypress Semiconductor is a 64-Kbit (8K × 8) serial SPI F-RAM nonvolatile memory with automotive-A grade qualification (–40 °C to +85 °C), 20 MHz max SPI clock, NoDelay™ write capability, and 10¹⁴ read/write endurance. It serves as direct hardware replacement for serial EEPROM/flash in real-time data logging systems requiring rapid, reliable byte-level writes without polling.

For engineers reviewing the CY15B064Q-SXA datasheet, CY15B064Q-SXA pinout, CY15B064Q-SXA application, or CY15B064Q-SXA equivalent, key selection criteria include guaranteed automotive temperature operation, zero-write-latency behavior, SPI mode 0/3 compatibility, 2.7–3.65 V supply range, and hardware/software write protection granularity (1/4, 1/2, or full array).

Technical Context

The CY15B064Q-SXA implements a ferroelectric memory array with synchronous SPI slave interface, supporting opcodes for Read, Write, WREN, WRDI, RDSR, and WRSR. Its internal architecture includes an 8-bit Status Register controlling WPEN, BP0/BP1 block protection bits, and a dedicated Write Enable Latch independent of command execution timing.

All memory operations execute at bus speed: write completion occurs within one SPI frame (no internal write cycle delay), and read access latency is limited only by SPI transfer time. The device requires no power management circuitry beyond POR and relies on host-controlled CS/SCK timing alignment per SPI mode 0 or 3 specifications.

Key Specifications

Pinout & Package

8-pin small outline integrated circuit (SOIC) package with standard 1.27 mm pitch and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V05-G and AT25DF041A-SSH-T, CY15B064Q-SXA uniquely delivers automotive-grade reliability, zero-write-latency operation, and 10¹⁴ endurance in a 64-Kbit footprint-making it optimal for safety-critical, high-write-rate automotive subsystems where timing determinism and longevity are non-negotiable.

Availability

CY15B064Q-SXA is available at Aetrix Electronics and suitable for telematics event logging, ADAS sensor calibration storage, and engine control unit parameter tuning requiring stable component supply across automotive production lifecycles.

Supply support for CY15B064Q-SXA 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 emphasis on mixed-signal and memory innovation.

CY15B064Q belongs to Cypress's automotive-qualified F-RAM product line, engineered specifically to replace serial EEPROM and flash in applications demanding ultra-high endurance, instant writes, and extended temperature operation.

FAQ

Is CY15B064Q-SXA pin-compatible with standard SPI EEPROMs?

Yes-CY15B064Q-SXA uses an industry-standard 8-pin SOIC package with identical pinout (CS, SCK, SI, SO, WP, HOLD, VSS, VDD) and supports the same SPI opcodes (0x03 Read, 0x02 Write, 0x06 WREN, etc.) as common serial EEPROMs, enabling drop-in replacement without PCB redesign.

Does CY15B064Q-SXA require special initialization or configuration after power-up?

No-after power-on reset, the device defaults to write-disabled state with Status Register BP0/BP1 = 00 (no block protection) and WPEN = 0. A WREN instruction is required before any write or WRSR operation, and no firmware calibration or timing setup is needed.

How does the HOLD pin behave during active memory operations?

When HOLD is pulled LOW while CS is active and SCK is LOW, the CY15B064Q-SXA suspends the current read or write operation, retains internal address and state, and tri-states SO. Operation resumes on next SCK edge after HOLD returns HIGH-no data corruption or restart overhead occurs.

Can CY15B064Q-SXA be used in SPI multi-drop configurations?

Yes-multiple CY15B064Q-SXA devices can share SI, SO, and SCK lines with individual CS signals. Each device responds only when its CS is LOW; no arbitration or collision handling is required since all communication is master-initiated and synchronous.