Infineon Technologies CY15B102QN-50SXIT

Overview

CY15B102QN-50SXIT from Infineon is a 2 Mb serial ferroelectric RAM (F-RAM) organized as 256K × 8, operating over SPI at up to 50 MHz with 1.8 V–3.6 V supply, 10¹⁵ write endurance, and 151-year data retention. It serves as a nonvolatile memory replacement for EEPROM/flash in real-time data logging, industrial control registers, and power-loss-critical sensor buffers.

For engineers reviewing the CY15B102QN-50SXIT datasheet, CY15B102QN-50SXIT pinout, CY15B102QN-50SXIT application, or CY15B102QN-50SXIT equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware/software write protection granularity, deep power-down current (0.1 µA), special sector reflow survivability, and industrial temperature range (–40°C to +85°C).

Technical Context

The CY15B102QN-50SXIT implements a true SPI slave interface with zero-write-latency architecture: data commits immediately upon byte transfer without polling or erase cycles. Its internal F-RAM array eliminates wear leveling and page programming overhead inherent in flash.

It integrates a nonvolatile status register, device ID (manufacturer + product ID), unique ID, and 8-byte writable serial number - all accessible via dedicated SPI opcodes. The 256-byte special sector retains data across three standard reflow cycles, enabling board-level traceability.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B102QSN-50ZSXI, the SOIC variant offers easier prototyping and legacy PCB compatibility; versus AT25DF021A-SSH-T, it delivers 10¹⁰× higher endurance and eliminates firmware complexity from erase/write management.

Availability

CY15B102QN-50SXIT is available at Aetrix Electronics and suitable for industrial data loggers, smart metering register banks, and PLC configuration storage requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY15B102QN-50SXIT 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 manufacturer specializing in power management, automotive ICs, and high-reliability memory solutions.

The EXCELON™ LP F-RAM product line targets applications demanding instant nonvolatile writes, extreme endurance, and low-power operation-particularly where flash or EEPROM reliability limits system robustness.

FAQ

Is CY15B102QN-50SXIT pin-compatible with standard SPI EEPROMs like AT25XXX series?

Yes-CY15B102QN-50SXIT uses identical 8-pin SOIC pinout and SPI command set (Read, Write, WREN, WRDI, RDSR) as common serial EEPROMs. It responds to same opcodes and address formats, enabling drop-in replacement without layout change. However, its zero-write-latency behavior eliminates need for status polling, simplifying firmware.

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

Yes-the special sector is accessed using dedicated SPI opcodes (0x77 for read, 0x76 for write) and occupies fixed addresses 0x00000–0x000FF. It is physically isolated from main array and retains data through three JEDEC J-STD-020 reflow cycles. No additional hardware or timing changes are needed.

What is the functional impact of the DNU pin in SOIC package?

The DNU pin in CY15B102QN-50SXIT's SOIC package has no internal connection and serves no electrical or thermal purpose. It may be left floating or tied to VDD per design preference. Leaving it unconnected introduces no risk; tying to VDD adds no benefit but avoids potential noise coupling in high-EMI environments.

Can CY15B102QN-50SXIT operate reliably at 1.8 V while running at 50 MHz SPI clock?

Yes-datasheet specifies full 50 MHz operation down to VDD = 1.8 V. At 1.8 V, active current is 2.4 mA (typ) and timing parameters meet spec across –40°C to +85°C. This enables direct interfacing with 1.8 V microcontrollers without level shifters, preserving signal integrity and reducing BOM count.