Renesas R1EX24032ASA00I#S0

Overview

R1EX24032ASA00I from Renesas Electronics is a 32-kbit (4,096 × 8-bit) two-wire serial interface EEPROM with I²C-compatible bus interface, 1.8 V to 5.5 V single-supply operation, and 400 kHz clock frequency-designed for nonvolatile configuration storage in industrial controllers, embedded sensors, and power management units.

For engineers reviewing the R1EX24032ASA00I datasheet, R1EX24032ASA00I pinout, R1EX24032ASA00I application, or R1EX24032ASA00I equivalent, key selection considerations include its 32-byte page write capability, −40°C to +85°C industrial temperature range, SOP-8 package with PRSP0008DF-B footprint, and WP pin-based hardware write protection for upper 8 kbit.

Technical Context

This device implements a standard I²C protocol with fixed 4-bit device code "1010", 3-bit hardware-selectable address (A0–A2), and R/W bit control-enabling up to eight devices on a shared bus. It uses MNOS memory technology with CMOS low-voltage circuitry for high reliability.

Write operations support both byte and page modes (up to 32 bytes per cycle), with internal 5 ms write cycle timing and acknowledge polling for host synchronization. Read modes include current address, random, and sequential reads-all requiring explicit start/stop conditions and ACK/NACK handshaking per I²C specification.

Key Specifications

Pinout & Package

Package: 8-pin plastic SOP (PRSP0008DF-B), 3.9 mm × 4.89 mm body, 1.27 mm pitch, Ni/Pd/Au-plated terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C32D-SSHM-T and M95320-DRE6TG, the R1EX24032ASA00I provides superior endurance (1M vs. 100k cycles) and built-in hardware write protection-making it optimal for mission-critical industrial and medical applications where data integrity outweighs raw speed or interface flexibility.

Availability

R1EX24032ASA00I is available at Aetrix Electronics and suitable for industrial PLCs, smart sensor modules, power management ICs, and portable medical devices requiring stable component supply across extended production lifecycles.

Supply support for R1EX24032ASA00I 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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The R1EX24xxx series was designed specifically for robust, low-power nonvolatile storage in harsh industrial environments-emphasizing reliability, wide voltage operation, and I²C protocol compliance over cost or density optimization.

FAQ

What is the maximum I²C clock frequency supported by the R1EX24032ASA00I?

The R1EX24032ASA00I supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This allows reliable communication with most microcontrollers while maintaining noise immunity and timing margin. Exceeding this frequency may result in failed ACK detection or data corruption, as confirmed in AC Characteristics Table (tLOW ≥ 1200 ns, tHIGH ≥ 600 ns). The R1EX24032ASA00I does not support fast-mode (1 MHz) or higher speeds.

How does the write protect (WP) pin function on the R1EX24032ASA00I?

On the R1EX24032ASA00I, the WP pin enables hardware-level write protection: when pulled high (VIH), it locks the upper 8 kbit (25%) of memory against accidental writes, while lower 24 kbit remain writable; when low (VIL), full 32 kbit read/write access is enabled. This feature is implemented internally-no external logic required-and remains active across power cycles. The R1EX24032ASA00I datasheet specifies VIH ≥ 0.7 × VCC and VIL ≤ 0.3 × VCC for reliable operation.

What package type and dimensions does the R1EX24032ASA00I use?

The R1EX24032ASA00I uses an 8-pin plastic SOP package designated PRSP0008DF-B (JEITA code FP-8DBV), measuring 3.9 mm × 4.89 mm with 1.27 mm lead pitch. It features Ni/Pd/Au plating, RoHS compliance, and a typical mass of 0.08 g. This footprint matches industry-standard 150-mil SOIC-8 layouts, enabling drop-in replacement in existing designs using compatible footprints like SOIC-8 or narrow SOIC.

Can the R1EX24032ASA00I operate reliably at 1.8 V supply voltage?

Yes, the R1EX24032ASA00I is fully specified for operation from 1.8 V to 5.5 V, including all electrical characteristics (read/write current, VOL, VIH/VIL thresholds, and timing parameters) across that range. At 1.8 V, it delivers 2 µA max standby current and supports 400 kHz I²C communication with adjusted VIH (≥1.26 V) and VIL (≤0.54 V) levels. This makes the R1EX24032ASA00I suitable for ultra-low-power 1.8 V systems such as battery-powered IoT nodes.

What is the endurance and data retention specification for the R1EX24032ASA00I?

The R1EX24032ASA00I guarantees 1,000,000 write/erase cycles at 25°C and 100,000 cycles at 85°C, with data retention of 100 years at 25°C and 10 years at 85°C. These values are measured per memory cell and reflect actual testing-not extrapolated estimates. The R1EX24032ASA00I achieves this using MNOS floating-gate technology and advanced CMOS process, making it suitable for applications requiring decades-long data integrity without refresh.