Infineon Technologies CY15B104Q-PZXI

Overview

CY15B104Q-PZXI from Cypress Semiconductor is a 4-Mbit serial SPI F-RAM (512K × 8) in an 8-pin PDIP package, operating at 1.8–3.6 V with industrial temperature range (−40 °C to +85 °C). It delivers NoDelay™ writes, 10¹⁵ read/write endurance, and 151-year data retention-enabling reliable nonvolatile storage in high-write-cycle applications like industrial data logging and metering.

For engineers reviewing the CY15B104Q-PZXI datasheet, CY15B104Q-PZXI pinout, CY15B104Q-PZXI application, or CY15B104Q-PZXI equivalent, key selection criteria include SPI mode 0/3 compatibility, WP-enabled hardware write protection, 50 MHz max clock rate, and dedicated 256-byte reflow-survivable special sector for calibration or configuration storage.

Technical Context

The CY15B104Q-PZXI implements a ferroelectric memory array with zero write latency-data commits immediately after each byte transfer without polling. Its SPI interface supports dual modes (0 and 3), with input latching on SCK rising edge and output driving on falling edge, ensuring deterministic timing across microcontroller platforms.

It integrates a nonvolatile status register, device ID (manufacturer + product ID), unique ID, and writable 8-byte serial number. The 256-byte special sector retains data through up to three standard reflow cycles, enabling factory-programmed identifiers or calibration constants that persist beyond board assembly.

Key Specifications

Pinout & Package

Package: 8-pin plastic dual in-line (PDIP), 0.3 inch width, through-hole mountable. RoHS compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB85RS4MT-FPN-G-JNE1 and AT45DB041E-SHN-T, the CY15B104Q-PZXI uniquely combines unlimited endurance, zero-write-latency, and factory-programmable identification-making it optimal for high-integrity, high-write-rate embedded systems where reliability and firmware simplicity are prioritized over minimal unit cost.

Availability

CY15B104Q-PZXI is available at Aetrix Electronics and suitable for industrial data loggers, smart electricity meters, automotive body control modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for CY15B104Q-PZXI 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 memory and programmable solutions for industrial, automotive, and IoT applications, with emphasis on low-power, nonvolatile, and mixed-signal integration.

The Excelon LP F-RAM product line targets applications demanding rapid, frequent, and reliable nonvolatile writes-replacing legacy EEPROM and flash where endurance, speed, and power efficiency are critical.

FAQ

Is CY15B104Q-PZXI pin-compatible with CY15V104Q-PZXI?

Yes-both share identical 8-pin PDIP footprint and SPI pinout (CS, SO, WP, VSS, VDD, DNU, SCK, SI). The only difference is voltage range: CY15B104Q supports 1.8–3.6 V, while CY15V104Q is limited to 1.71–1.89 V. Interchange is safe only if system VDD falls within both ranges.

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

No-the special sector resides at fixed addresses 0x7F000–0x7F0FF and uses standard READ/WRITE opcodes. It behaves identically to main array memory but is physically hardened to survive reflow soldering cycles without data loss.

Can WP pin be left unconnected in a design?

Yes-WP has an internal weak pull-up, so it defaults to HIGH (write-enable disabled) when floating. However, tying WP to VDD is recommended for noise immunity in electrically noisy environments, especially in industrial or automotive applications.

What SPI modes does CY15B104Q-PZXI support, and how is mode detection handled?

It supports SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). Mode detection is automatic: the device samples SCK's idle state at CS activation-LOW for Mode 0, HIGH for Mode 3-and synchronizes accordingly without configuration registers.