Renesas R1EX25032ATA00I#S0

Overview

R1EX25032ATA00I from Renesas Electronics is a 32-kbit serial SPI EEPROM (4,096 × 8-bit) in an 8-pin TSSOP package, operating from 1.8 V to 5.5 V with 5 MHz max clock frequency (≥2.5 V), 32-byte page write capability, and guaranteed 1,000k write cycles at 25°C. It serves as nonvolatile configuration storage in industrial controllers requiring robust data retention and low-power standby.

For engineers reviewing the R1EX25032ATA00I datasheet, R1EX25032ATA00I pinout, R1EX25032ATA00I application, or R1EX25032ATA00I equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware write protection via HOLD/W pins, 100-year data retention at 25°C, and TSSOP-8 thermal and board-space constraints for embedded systems.

Technical Context

This SPI EEPROM implements MONOS memory technology with CMOS low-voltage circuitry, enabling high reliability and low active power (3.5 mA max write, 3.0 mA max read). Its internal architecture includes a serial-parallel converter, address generator, Y/X decoders, and high-voltage generator for byte/page programming.

The device supports dual SPI modes (0 and 3), features a status register with WIP/WEL/BP1/BP0/SRWD bits for software- and hardware-based block protection, and uses a 16-bit address space (A11–A0 valid; A15–A12 don't care) with automatic address roll-over during sequential reads.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF041A-SSH-T and M95040-DRMN6TP/K, R1EX25032ATA00I delivers optimal balance of density, industrial-grade endurance, dual protection (W + SRWD), and HOLD functionality-making it preferred for mission-critical configuration storage where reliability and real-time communication control are essential.

Availability

R1EX25032ATA00I is available at Aetrix Electronics and suitable for industrial PLCs, medical calibration systems, smart energy meters, and automotive body control modules requiring stable component supply across extended product lifecycles.

Supply support for R1EX25032ATA00I 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 infrastructure markets.

The R1EX25xxx Series targets high-reliability embedded systems needing SPI EEPROM with advanced MONOS technology, extended temperature operation, and robust data protection-designed specifically for long-life industrial and medical applications.

FAQ

What is the maximum clock frequency supported by the R1EX25032ATA00I across its full voltage range?

The R1EX25032ATA00I supports up to 5 MHz when VCC is 2.5 V to 5.5 V, and up to 3 MHz when VCC is 1.8 V to 5.5 V. These limits are specified in the AC Characteristics tables on pages 5–6 of the R10DS0224EJ0100 datasheet and reflect guaranteed timing margins for reliable SPI communication across the entire industrial temperature range.

Does the R1EX25032ATA00I support hardware write protection independent of software configuration?

Yes, the R1EX25032ATA00I supports hardware write protection via the W pin combined with the SRWD bit in the status register. When SRWD = 1 and W is driven low, the status register becomes read-only and block protection bits (BP1/BP0) are frozen-preventing unauthorized modification even if the Write Enable Latch (WEL) is set. This hardware-locked mode is distinct from software-only protection using BP1/BP0 alone.

How many write cycles can the R1EX25032ATA00I endure at 85°C ambient temperature?

At 85°C, the R1EX25032ATA00I guarantees a minimum of 100,000 write cycles, as specified in the Memory Cell Characteristics table on page 3 of the R10DS0224EJ0100 datasheet. This derated endurance reflects accelerated wear at elevated temperature while maintaining 10-year data retention at that condition.

What is the function of the HOLD pin on the R1EX25032ATA00I, and how does it differ from chip select (S)?

The HOLD pin pauses ongoing SPI communication without deselecting the device-keeping the internal state intact and allowing resumption from the exact point of interruption. Unlike chip select (S), which places the device into standby (high-Z Q, 2.0 μA ISB) when high, HOLD maintains active power mode and preserves clock synchronization, enabling multi-master arbitration or host interrupt handling without transaction loss.

Is the R1EX25032ATA00I pin-compatible with other members of the R1EX25xxx family, such as the R1EX25064ATA00I?

No, the R1EX25032ATA00I is not pin-compatible with the R1EX25064ATA00I despite sharing the same TSSOP-8 package and pinout. While both use identical physical pin assignments (VCC, VSS, C, D, Q, S, W, HOLD), the R1EX25064ATA00I has a 16-bit address space (A15–A0) versus 12-bit (A11–A0) for the R1EX25032ATA00I, and differing AC timing parameters at 1.8 V operation-requiring firmware and timing validation for substitution.