Renesas R1EX25512ATA00I#U0

Overview

R1EX25512ATA00I from Renesas Electronics is a 512-kbit (64-Kword × 8-bit) Serial Peripheral Interface (SPI) EEPROM with MONOS memory technology, operating from 1.8 V to 5.5 V and supporting up to 3 MHz clock frequency at full voltage range. It delivers 5 ms max write cycle time, 1,000k endurance cycles at 25 °C, and 100-year data retention - deployed in industrial control modules for firmware parameter storage.

For engineers reviewing the R1EX25512ATA00I datasheet, R1EX25512ATA00I pinout, R1EX25512ATA00I application, or R1EX25512ATA00I equivalent, this page provides verified package mapping (TSSOP-8), SPI mode 0/3 compatibility, 128-byte page programming, hardware/software write protection logic, and real-world timing constraints under 1.8–5.5 V operation.

Technical Context

This SPI EEPROM implements a serial-parallel converter, address generator, and high-voltage generator for MONOS cell programming. Its control logic supports dual SPI modes (0 and 3), with dedicated HOLD and WRITE PROTECT pins enabling pause-on-demand and hardware-enforced block protection.

The device uses a 16-bit internal address register (A15–A0), auto-incrementing during READ, and enforces strict AC timing: tCLQV ≤ 150 ns, tW ≤ 5 ms, and tCH/tCL ≥ 150 ns minimum at 1.8–5.5 V. Status register bits (BP1/BP0/SRWD/WEL/WIP) govern non-volatile protection states and write enable latching.

Key Specifications

Pinout & Package

Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm footprint, 0.65 mm pitch, lead-free, JEDEC-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF512C-SSH-T and M95512-DRMN6TP/K, R1EX25512ATA00I uniquely combines 1.8–5.5 V flexibility, dedicated HOLD and W pins for deterministic pause/lock behavior, 1,000k endurance, and TSSOP-8 compactness - making it optimal for industrial and automotive parameter storage where reliability and pin-level control are prioritized over raw speed.

Availability

R1EX25512ATA00I is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control units, smart energy meter firmware, and embedded system parameter storage requiring stable component supply across extended temperature and voltage ranges.

Supply support for R1EX25512ATA00I 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 global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and IoT markets.

The R1EX25xxx series targets high-reliability, low-voltage embedded systems requiring long-life non-volatile storage - designed specifically for firmware parameter backup, calibration data retention, and secure configuration management in harsh environments.

FAQ

What is the maximum clock frequency supported by R1EX25512ATA00I across its full voltage range?

R1EX25512ATA00I supports up to 3 MHz clock frequency across its entire 1.8 V to 5.5 V operating voltage range. This is distinct from higher-frequency variants (e.g., R1EX25512ASA00I) that require ≥2.5 V for 5 MHz operation. The 3 MHz guarantee ensures timing compliance without voltage monitoring in mixed-supply systems.

Does R1EX25512ATA00I support hardware write protection independent of software configuration?

Yes. R1EX25512ATA00I implements true hardware write protection via the combination of the W (Write Protect) pin and SRWD (Status Register Write Disable) bit. When SRWD = 1 and W = low, the device enters Hardware Protected Mode - locking BP1/BP0 bits and rejecting all WRSR instructions regardless of WEL state.

What is the page size and maximum write time for R1EX25512ATA00I?

R1EX25512ATA00I has a fixed 128-byte page size and a maximum write cycle time of 5 ms per page. This applies to both single-byte and full-page writes; the internal logic automatically manages page boundaries, rolling over to the start of the page if more than 128 bytes are sent consecutively.

How does the HOLD function behave during an active R1EX25512ATA00I read or write sequence?

When HOLD is asserted low while C is low, R1EX25512ATA00I immediately places Q in high-impedance state and ignores further C and D transitions. The internal address and state machine are preserved. Release requires HOLD high while C remains low; then normal SPI operation resumes from the exact point of suspension.

Is R1EX25512ATA00I compatible with SPI mode 0 and mode 3, and how is mode selection handled?

Yes, R1EX25512ATA00I is compatible with both SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1). No configuration is required - the device detects and adapts to either mode automatically based on clock polarity and phase timing observed on the C pin during instruction latch.