Renesas R1EX24032ATA00A#S0

Overview

R1EX24032ATA00A from Renesas Electronics is a 32-kbit (4096 × 8-bit) two-wire serial interface EEPROM with I²C bus compatibility, 400 kHz clock frequency, 1.8–5.5 V supply range, and TSSOP-8 package. It delivers high reliability for nonvolatile data storage in embedded control systems requiring low-power, page-write capability, and industrial temperature operation.

For engineers reviewing the R1EX24032ATA00A datasheet, R1EX24032ATA00A pinout, R1EX24032ATA00A application, or R1EX24032ATA00A equivalent, key selection criteria include write endurance (1,000k cycles), data retention (100 years at 25°C), WP-controlled partial write protection, 32-byte page programming, and TSSOP-8 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device implements a standard I²C-compatible two-wire interface with fixed 1010 device code, 3-bit hardware address pins (A0–A2), and open-drain SDA/SCL signaling requiring external pull-ups. It supports byte and page write modes, with automatic address incrementing during page writes up to 32 bytes per cycle.

Internal architecture includes CMOS logic, MNOS memory cells, and a high-voltage generator for programming. Write protection is controlled by the WP pin, enabling selective locking of the upper 8 kbit (25%) of memory when pulled high, while read operations remain fully accessible regardless of WP state.

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, RoHS compliant.

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 R1EX24032ATA00A provides optimal balance of industrial temperature support, strict 400 kHz I²C timing compliance, and TSSOP-8 footprint-making it preferred for space-constrained industrial controllers where bus simplicity and long-term reliability outweigh raw speed or interface flexibility.

Availability

R1EX24032ATA00A is available at Aetrix Electronics and suitable for smart meters, industrial PLC modules, automotive body control units, and medical handheld diagnostics requiring stable component supply across extended product lifecycles.

Supply support for R1EX24032ATA00A 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 global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

The R1EX24xxx series was designed specifically for reliable, low-power nonvolatile storage in cost-sensitive embedded systems-emphasizing I²C simplicity, industrial temperature resilience, and long-term data integrity without battery backup.

FAQ

What is the maximum I²C clock frequency supported by the R1EX24032ATA00A?

The R1EX24032ATA00A supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This timing is validated across the full −40°C to +85°C operating range and 1.8–5.5 V supply voltage. Exceeding 400 kHz may result in unreliable communication or missed acknowledgments due to internal timing margins.

Does the R1EX24032ATA00A require external pull-up resistors on SDA and SCL lines?

Yes, the R1EX24032ATA00A requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain output drivers. Recommended values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; typical designs use 4.7 kΩ for 400 kHz operation with ≤400 pF total bus load.

How does the write protect (WP) pin function on the R1EX24032ATA00A?

When the WP pin is driven high (VIH ≥ 0.7 × VCC), the R1EX24032ATA00A protects the upper 8 kbit (25%) of memory from write operations while allowing full read access. When WP is low (VIL ≤ 0.3 × VCC), all 32 kbit are writable. Read operations are unaffected by WP state.

What is the page write size and typical write time for the R1EX24032ATA00A?

The R1EX24032ATA00A supports a 32-byte page write, and the maximum write cycle time is 5 ms. This means up to 32 bytes can be programmed in a single internal operation, significantly reducing total write latency compared to individual byte writes-especially beneficial for updating configuration blocks or calibration tables.

Is the R1EX24032ATA00A compatible with 1.8 V microcontrollers?

Yes, the R1EX24032ATA00A operates down to 1.8 V and is fully compatible with 1.8 V logic-level microcontrollers. Its VIH and VIL thresholds scale with VCC (VIH ≥ 0.7 × VCC, VIL ≤ 0.3 × VCC), ensuring reliable signal interpretation without level-shifting circuitry when interfaced to 1.8 V I²C masters.