Renesas R1EX24016ASAS0A#U0

Overview

R1EX24016ASAS0A from Renesas Electronics is a 16-kbit (2048 × 8-bit) two-wire serial EEPROM with I²C interface, 1.8–5.5 V single-supply operation, 400 kHz clock frequency, and 16-byte page write capability-used for configuration storage in consumer audio equipment, camcorders, and cellular phones.

For engineers reviewing the R1EX24016ASAS0A datasheet, R1EX24016ASAS0A pinout, R1EX24016ASAS0A application, or R1EX24016ASAS0A equivalent, key selection criteria include write endurance (1,000k cycles @25°C), data retention (100 years @25°C), SOP-8 package compatibility, and WP-enabled hardware write protection.

Technical Context

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

The internal architecture includes an 8-bit serial-parallel converter, X/Y decoders, address generator, high-voltage generator for programming, and sense amplifiers. Write operations are internally timed (t_WC = 5 ms max), and acknowledge polling supports host synchronization without fixed delay timing.

Key Specifications

Pinout & Package

Package: 8-pin plastic SOP (PRSP0008DF-B / FP-8DBV), 3.9 mm × 4.89 mm body, 1.27 mm pitch, Ni/Pd/Au-plated terminals.

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, R1EX24016ASAS0A offers superior data retention (100 years vs. ≤40 years) and guaranteed 400 kHz I²C compliance, making it optimal for consumer electronics where long-term data integrity outweighs raw speed or interface flexibility.

Availability

R1EX24016ASAS0A is available at Aetrix Electronics and suitable for consumer audio equipment, camcorders, and cellular phone peripherals requiring stable component supply and long-term data retention.

Supply support for R1EX24016ASAS0A 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 automotive, industrial, and consumer markets.

The R1EX24xxx series was designed specifically for low-power, high-reliability configuration storage in battery-operated consumer electronics, emphasizing write endurance, data retention, and I²C interoperability.

FAQ

What is the maximum I²C clock frequency supported by R1EX24016ASAS0A?

R1EX24016ASAS0A supports a maximum I²C clock frequency of 400 kHz, as specified in its AC characteristics table. This is compliant with the I²C Fast-mode standard. Exceeding this frequency may result in timing violations, failed acknowledgments, or corrupted writes. The device does not support standard-mode (100 kHz) only - it is fully Fast-mode capable within its rated operating conditions.

Does R1EX24016ASAS0A require external pull-up resistors on SDA and SCL lines?

Yes, R1EX24016ASAS0A requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is input-only. The datasheet specifies VOL ≤ 0.4 V at IOL = 3.0 mA (for VCC ≥ 2.7 V), so pull-up values must be selected based on bus capacitance, VCC level, and desired rise time - typically 2.2 kΩ to 10 kΩ for standard implementations. R1EX24016ASAS0A does not integrate internal pull-ups.

How does the WP pin function on R1EX24016ASAS0A?

The WP (Write Protect) pin on R1EX24016ASAS0A enables hardware-level write inhibition: when WP is driven high (VIH ≥ 0.7 × VCC), all 16 kbit of memory are write-protected; when WP is low (VIL ≤ 0.3 × VCC), full read/write access is enabled. No software command overrides WP state. R1EX24016ASAS0A outputs NO ACK during write attempts under WP high, providing immediate bus-level feedback to the host controller.

What is the page write size for R1EX24016ASAS0A, and how does it affect write efficiency?

R1EX24016ASAS0A supports a 16-byte page write size, meaning up to 16 sequential bytes can be written in a single 5 ms internal cycle. This reduces total write time versus byte-by-byte writes - e.g., writing 16 bytes takes one 5 ms cycle instead of sixteen 5 ms cycles. Page boundaries align to 16-byte addresses (a0–a3), and rollover occurs within the same page if write count exceeds boundary. This feature is intrinsic to R1EX24016ASAS0A's memory organization.

Is R1EX24016ASAS0A qualified for automotive applications?

No, R1EX24016ASAS0A is not qualified for automotive applications. The datasheet explicitly states that Renesas Technology's serial EEPROMs - including R1EX24016ASAS0A - are authorized only for consumer applications such as cellular phones, camcorders, and audio equipment. Industrial or automotive use (e.g., embedded controllers, meters, or vehicle systems) requires prior consultation with Renesas sales and validation against AEC-Q100 or equivalent standards - which R1EX24016ASAS0A does not meet.