Renesas R1EX24016ATAS0I#S0

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 nonvolatile parameter storage in industrial controllers and embedded sensor nodes.

For engineers reviewing the R1EX24016ATAS0I datasheet, R1EX24016ATAS0I pinout, R1EX24016ATAS0I application, or R1EX24016ATAS0I equivalent, key selection criteria include its 16-byte page write capability, WP pin-based hardware write protection, −40°C to +85°C industrial temperature range, and lead-free/halogen-free TSSOP-8 packaging compliant with RoHS.

Technical Context

This device implements a two-wire I²C-compatible serial interface with fixed 1010 device code and 3-bit address pins (A0–A2) for up to eight devices on one bus. Its internal architecture includes a voltage detector, high-voltage generator, and serial-parallel converter enabling byte and page write operations.

Write protection is controlled via the WP pin: logic high disables all writes and returns NO ACK; logic low enables full read/write access. The SDA pin uses open-drain output requiring external pull-up, and SCL accepts up to 400 kHz clock with defined tLOW ≥1200 ns and tHIGH ≥600 ns timing constraints.

Key Specifications

Pinout & Package

Package: 8-pin plastic TSSOP (PTSP0008JC-B / TTP-8DAV), 4.4 mm × 3.0 mm footprint, 0.65 mm pitch, lead-free and halogen-free.

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 offers superior high-temperature endurance and integrated hardware write protection - reducing firmware overhead and improving reliability in thermally stressed industrial deployments.

Availability

R1EX24016ATAS0I is available at Aetrix Electronics and suitable for industrial PLCs, smart sensors, medical diagnostics equipment, and automotive body control modules requiring stable component supply across multi-year production cycles.

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 global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and enterprise applications.

The R1EX24xxx series targets cost-sensitive, space-constrained embedded systems needing robust nonvolatile storage - designed specifically for industrial-grade reliability, low-voltage operation, and seamless I²C integration without external components.

FAQ

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

The R1EX24016ATAS0I 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 acknowledgments, or corrupted writes - the R1EX24016ATAS0I does not support fast-mode plus (1 MHz) or high-speed mode.

Does the R1EX24016ATAS0I require external pull-up resistors on SDA and SCL lines?

Yes, the R1EX24016ATAS0I requires external pull-up resistors on both SDA and SCL lines because these pins use open-drain outputs. The datasheet specifies maximum VOL of 0.4 V at 3.0 mA for SDA, so resistor value must be selected based on bus capacitance, supply voltage, and desired rise time. Typical values range from 2.2 kΩ to 10 kΩ at 3.3 V; the R1EX24016ATAS0I itself does not integrate pull-ups.

How does the write protect (WP) pin function on the R1EX24016ATAS0I?

On the R1EX24016ATAS0I, the WP pin is internally pulled down to VSS. When held high (VIH ≥ 0.7×VCC), it disables all write operations and causes the device to return NO ACK after receiving device and memory addresses. When low or unconnected, full read/write access is enabled. This hardware-level protection prevents accidental overwrites during power transitions or firmware glitches - a critical feature for safety-critical R1EX24016ATAS0I deployments.

What is the endurance specification of the R1EX24016ATAS0I at 85°C?

The R1EX24016ATAS0I guarantees a minimum endurance of 100,000 write/erase cycles at 85°C, as documented in the Memory Cell Characteristics table. This is distinct from its 1,000,000-cycle rating at 25°C. Designers using the R1EX24016ATAS0I in high-temperature environments - such as under-hood automotive modules or enclosed industrial enclosures - must account for this derated endurance when calculating expected lifetime under frequent write conditions.

Is the R1EX24016ATAS0I pin-compatible with other 8-pin TSSOP EEPROMs like the AT24C16?

No, the R1EX24016ATAS0I is not pin-compatible with standard AT24C16 variants despite sharing the same TSSOP-8 package outline. While both use VCC, VSS, SCL, SDA, and WP pins in identical physical locations, the R1EX24016ATAS0I assigns A0–A2 as No Connect (NC) per its pin arrangement diagram, whereas AT24C16 uses those pins for device addressing. Swapping them without verifying pin function alignment risks communication failure or unintended addressing behavior in the R1EX24016ATAS0I.