Renesas R1EX24016ATAS0I#U0

Overview

R1EX24016ATAS0I from Renesas Electronics is a 16-kbit (2,048 × 8-bit) two-wire serial EEPROM with I²C interface, MONOS memory technology, and TSSOP-8 package. It operates from 1.8 V to 5.5 V, supports 400 kHz clock frequency, delivers 5 ms write cycle time, and guarantees 1,000k endurance cycles at 25°C - used for firmware parameter storage in industrial controllers and sensor calibration data retention.

For engineers reviewing the R1EX24016ATAS0I datasheet, R1EX24016ATAS0I pinout, R1EX24016ATAS0I application, or R1EX24016ATAS0I equivalent, key selection criteria include its halogen-free TSSOP-8 footprint, WP-enabled hardware write protection, 16-byte page programming capability, and guaranteed 100-year data retention at 25°C.

Technical Context

This device implements a two-wire I²C-compatible serial interface with fixed 1010 device code, supporting byte and 16-byte page writes. Its internal address generator uses A0–A2 pins as memory address bits a8–a10, enabling up to one device per bus segment.

The EEPROM integrates a voltage detector and high-voltage generator for reliable MONOS cell programming, with automatic write-cycle timing and acknowledge polling support. Write protection is controlled via the WP pin, which internally pulls down to VSS when unconnected, allowing full memory access by default.

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 and halogen-free (#U0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C16D-SSHM-T and M95160-DFMN6TP, the R1EX24016ATAS0I uniquely balances industrial-grade endurance, halogen-free compliance, and native I²C simplicity - making it optimal for cost-sensitive, long-lifecycle embedded systems requiring guaranteed 100-year data integrity without protocol translation.

Availability

R1EX24016ATAS0I is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, and IoT edge node configuration requiring stable component supply and long-term manufacturing continuity.

Supply support for R1EX24016ATAS0I 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, and power devices for industrial, automotive, and infrastructure markets.

The R1EX24xxx series was designed specifically for robust, low-power nonvolatile storage in space-constrained industrial and consumer electronics - emphasizing reliability, wide voltage operation, and halogen-free compliance from wafer to package.

FAQ

What is the maximum I²C clock frequency supported by the R1EX24016ATAS0I?

The R1EX24016ATAS0I supports a maximum I²C clock frequency of 400 kHz, compliant with standard-mode I²C specifications. This limit applies across the full operating voltage range (1.8 V to 5.5 V) and temperature range (−40°C to +85°C). Exceeding 400 kHz may result in timing violations, failed acknowledgments, or incomplete write cycles - the R1EX24016ATAS0I does not support fast-mode (1 MHz) operation.

How does the WP pin function on the R1EX24016ATAS0I, and what happens when it is left unconnected?

On the R1EX24016ATAS0I, the WP (Write Protect) pin is active-high and internally pulled down to VSS. When left unconnected, WP defaults to low, enabling full read/write access to all 16 kbit. When driven high, it disables all write operations across the entire memory array. The R1EX24016ATAS0I outputs NACK after address transmission under WP=high, providing immediate hardware-level feedback to the host controller.

What is the page write capability of the R1EX24016ATAS0I, and how does it improve system performance?

The R1EX24016ATAS0I supports 16-byte page writes, allowing up to 16 sequential bytes to be programmed in a single 5 ms internal write cycle. This reduces average programming time per byte by up to 16× compared to individual byte writes, significantly accelerating firmware patching, sensor calibration batch updates, or configuration table saves - especially beneficial in time-critical embedded boot sequences.

Is the R1EX24016ATAS0I compatible with 1.8 V microcontrollers, and what are the key DC parameters at that voltage?

Yes, the R1EX24016ATAS0I is fully compatible with 1.8 V systems. At VCC = 1.8 V, it guarantees VOL1 ≤ 0.2 V (with IOL = 1.5 mA), VIH ≥ 1.26 V, VIL ≤ 0.54 V, and ICC2 ≤ 3.0 mA during write. These parameters ensure reliable signal integrity and power budgeting in ultra-low-voltage IoT nodes - no level shifters required for direct interface with 1.8 V MCUs.

Does the R1EX24016ATAS0I require an external pull-up resistor on the SDA line, and what value is recommended?

Yes, the R1EX24016ATAS0I requires external pull-up resistors on both SCL and SDA lines due to their open-drain architecture. Recommended values depend on bus capacitance and speed: for 400 kHz operation with ≤400 pF total capacitance, 2.2 kΩ to 4.7 kΩ is typical. The R1EX24016ATAS0I's VOL1 specification (≤0.2 V at 1.5 mA) allows calculation of maximum allowable resistance to maintain noise margin.