Renesas R1EX24016ASA00I#S0

Overview

R1EX24016ASA00I from Renesas Electronics is a 16-kbit (2048 × 8-bit) two-wire serial EEPROM with I²C interface, operating from 1.8 V to 5.5 V, supporting 400 kHz clock frequency, and housed in an 8-pin SOP package. It delivers 100-year data retention at 25°C, 1,000k write cycles, and integrated write protection for industrial control and embedded system configuration storage.

For engineers reviewing the R1EX24016ASA00I datasheet, R1EX24016ASA00I pinout, R1EX24016ASA00I application, or R1EX24016ASA00I equivalent, key selection considerations include its 16-byte page-write capability, −40°C to +85°C industrial temperature range, low 2 µA standby current, and hardware-based WP pin for selective memory locking.

Technical Context

This device implements a standard I²C-compatible two-wire serial interface with fixed 4-bit device code "1010", 3-bit hardware-selectable address (A0–A2), and R/W bit control. It uses CMOS process with MNOS memory technology to achieve high reliability and low power consumption.

Internal architecture includes a serial-parallel converter, X/Y decoders, address generator, and high-voltage generator for programming. Write operations support byte and page modes (up to 16 bytes per page), with automatic internal timing (5 ms write cycle) and acknowledge polling for status detection.

Key Specifications

Pinout & Package

Package: 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), 3.9 mm × 4.89 mm body, 1.27 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 AT24C16D-SSHM-T and M95160-DRMN6TP/K, the R1EX24016ASA00I provides optimal balance of industrial temperature resilience, hardware write protection granularity, and proven integration with Renesas MCU ecosystems-making it ideal for cost-sensitive, long-lifecycle embedded systems where I²C is standardized.

Availability

R1EX24016ASA00I is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and automotive body control applications requiring stable component supply and long-term manufacturing continuity.

Supply support for R1EX24016ASA00I 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 enterprise applications.

The R1EX24xxx series was designed specifically for robust, low-power nonvolatile storage in resource-constrained embedded systems-emphasizing reliability, wide voltage operation, and seamless I²C integration with Renesas' own MCU families.

FAQ

What is the maximum I²C clock frequency supported by the R1EX24016ASA00I?

The R1EX24016ASA00I supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This allows reliable communication with most microcontrollers without requiring high-speed mode hardware or timing adjustments. The device guarantees AC timing parameters-including tLOW (1200 ns min), tHIGH (600 ns min), and tSU.DAT (100 ns min)-across its full operating voltage (1.8–5.5 V) and temperature (−40°C to +85°C) range. Exceeding 400 kHz may result in failed acknowledge or data corruption.

How does the write protect (WP) pin function on the R1EX24016ASA00I?

On the R1EX24016ASA00I, the WP pin is an active-high hardware lock: when pulled high (VIH ≥ 0.7 × VCC), it disables writes to the upper 8 kbit (addresses 0x800–0xFFF), while allowing full read/write access to the lower 8 kbit. When WP is low (VIL ≤ 0.3 × VCC), all 16 kbit are writable. This enables selective protection of critical firmware parameters or calibration data without software intervention-enhancing system security and field upgrade safety.

What is the page write capacity of the R1EX24016ASA00I, and how does it improve performance?

The R1EX24016ASA00I supports 16-byte page writes, meaning up to 16 sequential bytes can be written in a single internal cycle. This reduces average write time by up to 8× compared to individual byte writes, since only one 5 ms internal write cycle is triggered instead of 16 separate ones. For example, saving a 16-byte sensor calibration table completes in ~5 ms versus ~80 ms with byte writes-critical for deterministic power-loss recovery in industrial controllers.

Is the R1EX24016ASA00I compatible with 1.8 V microcontrollers?

Yes, the R1EX24016ASA00I operates from 1.8 V to 5.5 V and is fully compatible with 1.8 V logic interfaces. Its VIH threshold is defined as VCC × 0.7 (≥1.26 V at 1.8 V), and VOL is specified at 0.2 V (max) for IOL = 1.5 mA-ensuring clean signal recognition by 1.8 V MCUs. Pull-up resistors on SDA/SCL should be selected per bus capacitance (≤6 pF) and target rise time (≤300 ns), typically 10 kΩ for short traces.

What is the guaranteed data retention period for the R1EX24016ASA00I at 85°C?

The R1EX24016ASA00I guarantees 10 years of data retention at +85°C, as specified in the memory cell characteristics table. At 25°C, retention extends to 100 years. This derating reflects accelerated charge loss in the MNOS floating gate under thermal stress-making the device suitable for applications deployed in hot environments (e.g., engine bay sensors, enclosed industrial enclosures) where long-term data integrity remains critical over multi-year service life.