Renesas R1EX24016ASAS0I#U0

Overview

R1EX24016ASAS0I from Renesas Electronics is a 16-kbit (2,048 × 8-bit) two-wire serial EEPROM with I²C interface, MONOS memory technology, 400 kHz clock support, 1.8–5.5 V single-supply operation, and 16-byte page write capability-used for nonvolatile parameter storage in embedded control modules, sensor calibration registers, and power management configuration.

For engineers reviewing the R1EX24016ASAS0I datasheet, R1EX24016ASAS0I pinout, R1EX24016ASAS0I application, or R1EX24016ASAS0I equivalent, key selection considerations include its SOP-8 package, −40°C to +85°C industrial temperature range, WP pin-based hardware write protection, 5 ms write cycle time, and guaranteed 1,000k endurance cycles at 25°C.

Technical Context

This device implements a two-wire I²C-compatible serial interface with fixed 1010 device code, 3-bit addressable A0–A2 pins (NC in this variant), and open-drain SDA/SCL signaling requiring external pull-ups. It uses MONOS charge-trap memory for high reliability and low-voltage operation.

The internal architecture includes voltage detection, high-voltage generation for programming, serial-to-parallel conversion, and automatic page write logic that increments a0–a3 during multi-byte writes. Write protection is controlled via the WP pin, which is internally pulled down to VSS when unconnected.

Key Specifications

Pinout & Package

Package: 150-mil 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), lead-free and halogen-free (#U0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R1EX24016ASAS0I, AT24C16D offers higher endurance and broader voltage tolerance, while BR24G16FJ provides faster I²C speed but reduced write-cycle lifetime-making R1EX24016ASAS0I optimal for balanced industrial use cases demanding reliability, longevity, and SOP-8 compatibility.

Availability

R1EX24016ASAS0I is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, and consumer audio device settings requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R1EX24016ASAS0I 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 R1EX24xxx series was designed specifically for robust, low-power nonvolatile storage in space-constrained industrial and automotive control systems-emphasizing MONOS reliability, wide VCC range, and hardware write protection.

FAQ

What is the maximum I²C clock frequency supported by the R1EX24016ASAS0I?

The R1EX24016ASAS0I supports a maximum I²C clock frequency of 400 kHz, as specified in its AC characteristics table. This limit applies 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 acknowledgments, or corrupted writes. The device does not support fast-mode plus (1 MHz) or high-speed mode.

Does the R1EX24016ASAS0I require external pull-up resistors on SDA and SCL lines?

Yes, the R1EX24016ASAS0I requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain output drivers. The datasheet specifies VOL ≤ 0.4 V at IOL = 3.0 mA (for VCC ≥ 2.7 V), so resistor values must be selected to meet bus rise time and drive strength requirements-typically 2.2 kΩ to 10 kΩ depending on bus capacitance and VCC level. Failure to install pull-ups will prevent I²C communication.

How does the write protection (WP) pin function on the R1EX24016ASAS0I?

On the R1EX24016ASAS0I, the WP pin is active-high: when driven to VIH (≥0.7 × VCC), it disables all write operations across the full 16 kbit array and returns NACK after address transmission. When pulled low or left unconnected (due to internal VSS pull-down), write operations are fully enabled. This hardware lock prevents accidental overwrites during power transitions or firmware glitches without requiring software coordination.

What is the endurance rating of the R1EX24016ASAS0I at 85°C ambient temperature?

The R1EX24016ASAS0I is rated for a minimum of 100,000 write/erase cycles at 85°C ambient temperature, as documented in the Memory Cell Characteristics table. This is one-tenth of its 25°C rating (1,000k cycles), reflecting accelerated wear at elevated junction temperatures. Designers should apply derating models or implement wear-leveling in firmware when operating continuously at high temperature.

Is the R1EX24016ASAS0I pin-compatible with other 8-pin SOP EEPROMs like the AT24C16?

Yes, the R1EX24016ASAS0I is pin-compatible with standard 8-pin SOP I²C EEPROMs including the AT24C16 family: VSS (pin 4), VCC (pin 5), WP (pin 6), SCL (pin 7), and SDA (pin 8) occupy identical positions. Pins A0–A2 (1–3) are NC in this variant, matching AT24C16 configurations where those pins are unused-enabling direct PCB replacement without layout changes.