Renesas R1EX24002ATAS0I#S0

Overview

R1EX24002ATAS0I from Renesas Electronics is a 2 kbit (256 × 8-bit) two-wire serial interface EEPROM with I²C-compatible bus interface, 400 kHz clock frequency, 1.8–5.5 V single-supply operation, and TSSOP-8 package. It delivers high reliability via MONOS memory technology, supports 16-byte page writes, and targets nonvolatile data storage in space-constrained industrial and embedded control systems.

For engineers reviewing the R1EX24002ATAS0I datasheet, R1EX24002ATAS0I pinout, R1EX24002ATAS0I application, or R1EX24002ATAS0I equivalent, key selection considerations include write endurance (1,000k cycles @25°C), data retention (100+ years @25°C), WP pin-controlled hardware write protection, low-power standby current (≤2.0 μA), and compatibility with standard I²C timing and addressing protocols.

Technical Context

This device implements a true two-wire I²C serial interface with fixed 1010 device code and user-configurable A0–A2 address pins enabling up to eight devices on one bus. It uses internal high-voltage generation for memory programming and includes voltage detection for power-on reset protection against unintended writes during VCC transitions.

Memory access follows standard I²C protocol: byte write requires device address + memory address + data + stop; page write accepts up to 16 bytes before initiating internal 5 ms write cycle; read modes include current address, random, and sequential reads-all using ACK/NO ACK handshaking at the ninth clock edge. WP pin state (VIH/VIL) directly gates all write operations.

Key Specifications

Pinout & Package

Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm body, 0.65 mm lead pitch, Ni/Pd/Au plating, lead-free and halogen-free (#S0 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02C-SSHM-T and BR24G02NUX-5TR, the R1EX24002ATAS0I provides superior long-term reliability (1,000k cycles, 100+ year retention) and hardware-based WP simplicity, making it optimal for infrastructure-grade equipment where maintenance intervals exceed 10 years and firmware integrity is paramount.

Availability

R1EX24002ATAS0I is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, power meter firmware patching, and medical device audit logs requiring stable component supply across extended production lifecycles.

Supply support for R1EX24002ATAS0I 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.

The R1EX24xxx series was designed specifically for robust, low-power, long-lifetime nonvolatile storage in space-constrained embedded systems where data integrity and supply chain stability are critical.

FAQ

What is the maximum I²C clock frequency supported by the R1EX24002ATAS0I?

The R1EX24002ATAS0I supports a maximum I²C clock frequency of 400 kHz, as specified in its AC characteristics table. This value is guaranteed across the full operating temperature range (−40°C to +85°C) and supply voltage range (1.8 V to 5.5 V). Exceeding 400 kHz may result in timing violations, failed ACKs, or incomplete writes. The device does not support Fast-mode Plus (1 MHz) or High-speed mode.

How does the Write Protect (WP) pin function on the R1EX24002ATAS0I?

When the WP pin is driven high (VIH ≥ 0.7 × VCC), the R1EX24002ATAS0I disables all write operations - including byte and page writes - and returns NO ACK after receiving device and memory addresses. When WP is low (VIL ≤ 0.3 × VCC) or floating (internally pulled down), full read/write access is enabled. This hardware-level protection operates independently of I²C commands and prevents corruption during power transients.

What is the guaranteed write endurance and data retention for the R1EX24002ATAS0I?

The R1EX24002ATAS0I guarantees a minimum of 1,000,000 write cycles at 25°C and 100,000 cycles at 85°C. Data retention is rated at 100+ years at 25°C and 10+ years at 85°C. These values are based on MONOS memory technology and are validated per JEDEC standards - not typical or average figures. Endurance and retention are not degraded by partial-page writes or mixed read/write patterns.

Does the R1EX24002ATAS0I require external pull-up resistors on SDA and SCL lines?

Yes, the R1EX24002ATAS0I requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain outputs. Resistor values must be selected considering VCC level, bus capacitance, and required rise time (≤300 ns). For example, at 3.3 V with 200 pF total bus capacitance, a 2.2 kΩ pull-up meets VOL ≤ 0.4 V and tR ≤ 300 ns per datasheet DC and AC specs.

What package type and dimensions does the R1EX24002ATAS0I use?

The R1EX24002ATAS0I uses an 8-pin TSSOP package (JEITA code PTSP0008JC-B, previous code TTP-8DAV) measuring 4.4 mm × 3.0 mm with 0.65 mm lead pitch. Pin 1 index mark is located at top-left corner; body thickness is 1.10 mm max. This compact footprint supports high-density PCB layouts in space-constrained applications such as smart meters and portable medical devices.