Renesas R1EX25512ATA00I#S0

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 1.8 V–5.5 V. It delivers 5 ms max write cycle time, 1,000k write endurance at 25 °C, and 100-year data retention - deployed in industrial control modules for nonvolatile parameter storage.

For engineers reviewing the R1EX25512ATA00I datasheet, R1EX25512ATA00I pinout, R1EX25512ATA00I application, or R1EX25512ATA00I equivalent, this page provides verified SPI EEPROM specifications, TSSOP-8 pin mapping, page-write timing constraints, hardware/software protection modes, and validated alternative parts for embedded system design and BOM continuity planning.

Technical Context

This SPI EEPROM implements Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) interface protocols with dual-voltage AC timing: 5 MHz operation at 2.5–5.5 V and 3 MHz at 1.8–5.5 V. Its internal architecture includes a 128-byte page buffer, status register with SRWD/BP1/BP0 bits, and hardware-protected mode activated by W pin low + SRWD=1.

The device integrates MONOS charge-trap memory cells on CMOS process, enabling ultra-low standby current (5 µA max) and robust data retention across −40 to +85 °C. Write operations require explicit WREN instruction, and HOLD pin enables pause/resume of ongoing SPI transfers without chip deselection.

Key Specifications

Pinout & Package

Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm body, 0.65 mm pitch, lead-free, Ni/Pd/Au plating.

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, the R1EX25512ATA00I uniquely combines 1.8 V operation, dedicated HOLD and W pins, and hardware-protected mode - making it optimal for safety-critical or mixed-voltage embedded systems requiring deterministic SPI control and tamper-resistant configuration storage.

Availability

R1EX25512ATA00I is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive body control units, smart energy meters, and portable instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.

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 industrial, automotive, and IoT applications.

The R1EX25xxx series targets space-constrained, low-power embedded systems needing reliable, pin-compatible SPI EEPROMs with advanced data protection - designed specifically for mission-critical configuration and calibration storage.

FAQ

What is the maximum clock frequency supported by R1EX25512ATA00I at 1.8 V?

The R1EX25512ATA00I supports up to 3 MHz clock frequency across its full 1.8 V to 5.5 V supply range. This is confirmed in the AC Characteristics table for Ta = −40 to +85 °C and VCC = 1.8 V to 5.5 V. At 2.5 V to 5.5 V, the maximum rises to 5 MHz. The R1EX25512ATA00I's dual-voltage timing specification eliminates need for clock throttling in mixed-supply systems.

Does R1EX25512ATA00I support hardware write protection independent of software settings?

Yes. The R1EX25512ATA00I implements hardware-protected mode (HPM) using the combination of the SRWD bit and W pin. When SRWD = 1 and W is driven low, the BP0/BP1 bits and SRWD itself become read-only, and WRSR instructions are rejected - providing irreversible protection against firmware bugs or malware. This behavior is explicitly defined in the Data Protect section of the datasheet.

What package type is used for R1EX25512ATA00I?

The R1EX25512ATA00I uses an 8-pin plastic TSSOP package designated PTSP0008JC-B (JEITA code TTP-8DAV), measuring 4.4 mm × 3.0 mm with 0.65 mm lead pitch. This is distinct from the SOP-8 variant R1EX25512ASA00I (PRSP0008DF-B). Package dimensions and land pattern requirements are detailed on page 19 of the datasheet.

How does the HOLD function operate on R1EX25512ATA00I?

The HOLD pin on R1EX25512ATA00I pauses ongoing SPI communication without deselecting the device or resetting internal state. Activation requires HOLD low while serial clock (C) is low; deactivation requires HOLD high while C remains low. During HOLD, Q goes high-Z and D/C are ignored. This enables precise synchronization with host processor interrupts or DMA transfers.

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

The R1EX25512ATA00I has a fixed 128-byte page size and maximum write cycle time of 5 ms per page. Page writes occur automatically when multiple bytes are shifted in with S held low - the internal address counter increments until the page boundary (128 bytes) is reached or S goes high. This is documented in the Features and Write to Memory Array sections of the datasheet.