Renesas R1EX25064ATA00I#S0

Overview

R1EX25064ATA00I#S0 from Renesas Electronics is a 64-kbit SPI serial EEPROM (8-kword × 8-bit) in TSSOP-8 package, operating from 1.8 V to 5.5 V with 3 MHz max clock at 1.8 V and 5 MHz at ≥2.5 V, featuring 32-byte page write, 5 ms write cycle time, and industrial −40°C to +85°C temperature range - used for firmware parameter storage in embedded controllers.

For engineers reviewing the R1EX25064ATA00I#S0 datasheet, R1EX25064ATA00I#S0 pinout, R1EX25064ATA00I#S0 application, or R1EX25064ATA00I#S0 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed TSSOP-8 package mapping, real-world use cases in power management and sensor calibration, and two technically documented alternative parts with precise functional distinctions.

Technical Context

This device implements a standard SPI interface with Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) support, using MONOS memory technology for high endurance and data retention. It integrates on-chip voltage detection, automatic page write logic, and a status register with WIP, WEL, BP1/BP0, and SRWD bits for hardware/software protection control.

The memory array is organized as 8,192 × 8-bit with 32-byte page boundaries; write operations require prior WREN instruction and are blocked if WEL=0 or protected address ranges are accessed. HOLD pin enables communication pause without chip deselection, and W pin enables hardware-locked status register writes when SRWD=1 and W=low.

Key Specifications

Pinout & Package

TSSOP-8 package (PTSP0008JC-B / TTP-8DAV), 3.0 mm × 4.4 mm body, 0.65 mm lead pitch, lead-free and halogen-free (#S0 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R1EX25064ATA00I#S0, AT25DF041A-SSH-T offers greater density but sacrifices HOLD functionality and TSSOP-8 compatibility, while M95M04-DRMN6TP/K provides faster clocking but lacks hardware-enforced status register locking - making R1EX25064ATA00I#S0 uniquely suited for compact, security-sensitive industrial firmware storage.

Availability

R1EX25064ATA00I#S0 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, medical sensor calibration, and automotive body control module applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R1EX25064ATA00I#S0 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

Renesas Electronics is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The R1EX25xxx series targets cost-sensitive, space-constrained embedded systems requiring reliable, low-voltage serial EEPROM with robust hardware-based data protection - designed specifically for firmware parameter storage in harsh environments.

FAQ

What is the maximum SPI clock frequency supported by R1EX25064ATA00I#S0 at 1.8 V?

R1EX25064ATA00I#S0 supports up to 3 MHz SPI clock frequency when operated at 1.8 V, as specified in the AC Characteristics table for VCC = 1.8 V to 5.5 V. This limit ensures reliable setup/hold timing margins under low-voltage conditions and is validated across the full −40°C to +85°C temperature range.

Does R1EX25064ATA00I#S0 support hardware write protection independent of software configuration?

Yes, R1EX25064ATA00I#S0 supports hardware write protection via the SRWD bit and W pin: when SRWD=1 and W=low, the status register becomes permanently read-only, preventing modification of BP1/BP0 bits even if WREN is executed - a feature confirmed in the Functional Description and Data Protect sections of the datasheet.

What package type is used for R1EX25064ATA00I#S0, and what are its key mechanical dimensions?

R1EX25064ATA00I#S0 uses the TSSOP-8 package (JEITA code PTSP0008JC-B, Renesas code TTP-8DAV), measuring 3.0 mm × 4.4 mm with 0.65 mm lead pitch. Its height is ≤1.2 mm, and it features Ni/Pd/Au plating - fully compliant with lead-free and halogen-free requirements per the #S0 suffix.

How many write cycles can R1EX25064ATA00I#S0 endure at 85°C?

R1EX25064ATA00I#S0 guarantees ≥100,000 write cycles at 85°C, as documented in the Memory Cell Characteristics table. This is derated from the 1,000,000-cycle rating at 25°C to ensure reliability under sustained high-temperature operation in industrial and automotive applications.

Is the HOLD pin on R1EX25064ATA00I#S0 functional without deselecting the chip?

Yes, the HOLD pin on R1EX25064ATA00I#S0 pauses SPI communication while maintaining chip selection (S=low), preserving internal address and state. As described in the Pin Function and Hold Condition sections, HOLD must be asserted when C=low and deasserted under the same condition to avoid undefined behavior.