Renesas R1EX24016ATAS0A#S0

Overview

R1EX24016ATAS0A from Renesas Electronics is a 16-kbit (2048 × 8-bit) two-wire serial I²C EEPROM with 1.8 V to 5.5 V single-supply operation, 400 kHz clock frequency, and TSSOP-8 packaging. It delivers 1,000k write cycles at 25°C, 100-year data retention, and 16-byte page write capability for embedded system configuration storage in consumer electronics and industrial control.

For engineers reviewing the R1EX24016ATAS0A datasheet, R1EX24016ATAS0A pinout, R1EX24016ATAS0A application, or R1EX24016ATAS0A equivalent, key selection considerations include its I²C-compatible timing compliance, WP-enabled hardware write protection, low-power standby current (2 µA max), and TSSOP-8 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device implements a standard I²C protocol interface with fixed 4-bit device code "1010", 3-bit hardware address pins (A0–A2), and R/W bit-controlled transaction direction. Its internal architecture includes an 8-bit serial-parallel converter, X/Y decoders, and a high-reliability MNOS memory array fabricated using CMOS low-voltage process technology.

Write operations support both byte and 16-byte page modes, with automatic address incrementing within pages and internal 5 ms write-cycle timing. Acknowledge polling enables host firmware to detect write completion without fixed delay, while noise suppression filters pulses <50 ns on SCL/SDA lines to prevent spurious command execution.

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 serial EEPROM applications.

Compared with AT24C16D-SSHM-T and M95160-DFMN6TP, R1EX24016ATAS0A provides superior long-term data integrity (100-year retention) and proven robustness in thermally cycled industrial environments, making it the preferred choice for infrastructure and safety-related applications where parameter corruption is unacceptable.

Availability

R1EX24016ATAS0A is available at Aetrix Electronics and suitable for smart meter firmware settings, industrial sensor calibration, and automotive body control module applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for R1EX24016ATAS0A 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 reliable, low-power nonvolatile storage in resource-constrained embedded systems-emphasizing I²C compatibility, extended data retention, and robust operation across wide temperature ranges.

FAQ

What is the maximum I²C clock frequency supported by R1EX24016ATAS0A?

R1EX24016ATAS0A supports a maximum I²C clock frequency of 400 kHz, compliant with Fast-mode I²C specifications. This allows read access times as low as 100 ns and ensures interoperability with standard microcontroller I²C peripherals without requiring custom timing adjustments. The device maintains full functionality across its entire 1.8–5.5 V supply range at this speed.

Does R1EX24016ATAS0A require external pull-up resistors on SCL and SDA lines?

Yes, R1EX24016ATAS0A requires external pull-up resistors on both SCL and SDA lines because it uses open-drain output drivers. Recommended values range from 1.8 kΩ to 10 kΩ depending on bus capacitance and desired rise time; for 400 kHz operation with ≤200 pF total capacitance, 4.7 kΩ is typical. R1EX24016ATAS0A will not function correctly without properly sized pull-ups.

How does the Write Protect (WP) pin function on R1EX24016ATAS0A?

When the WP pin is driven high (VIH ≥ 0.7 × VCC), R1EX24016ATAS0A disables all write operations-including byte and page writes-and returns a NACK after receiving the device address. When WP is low (VIL ≤ 0.3 × VCC), full read/write access is enabled. This hardware-level protection prevents accidental overwrites during power-up/down sequences or firmware errors.

What is the endurance rating of R1EX24016ATAS0A at 85°C ambient temperature?

R1EX24016ATAS0A guarantees 100k write cycles at 85°C ambient temperature, as specified in its memory cell characteristics table. This is derated from the 1,000k cycles rated at 25°C to account for accelerated oxide degradation at elevated temperatures-ensuring reliable operation in hot industrial enclosures or automotive under-hood environments.

Can R1EX24016ATAS0A be used in automotive applications?

R1EX24016ATAS0A is qualified for industrial temperature range (−40°C to +85°C) and RoHS compliance, but Renesas explicitly states that R1EX24xxx series devices are authorized for consumer applications (e.g., audio equipment, camcorders) and require sales office consultation before use in automotive systems. For AEC-Q100 qualified alternatives, engineers should evaluate Renesas' automotive-grade EEPROM portfolio separately.