Renesas HN58X2402STI#S0

Overview

HN58X2402STI#S0 from Renesas Technology is a 2-kbit I²C-compatible serial EEPROM organized as 256 × 8 bits, operating from 1.8 V to 5.5 V with write cycle time of 5 ms max and endurance of 1 million write cycles. It features hardware write protection via WP pin, supports standard (100 kHz) and fast-mode (400 kHz) I²C bus timing, and is qualified for industrial temperature range (−40°C to +85°C). It is used in embedded systems for storing calibration data, configuration settings, and device identifiers.

For engineers reviewing the HN58X2402STI#S0 datasheet, HN58X2402STI#S0 pinout, HN58X2402STI#S0 application, or HN58X2402STI#S0 equivalent, key selection considerations include its 8-pin TSSOP package, I²C address flexibility (A0–A2 pins), 1.8 V minimum supply voltage, hardware write protect capability, and guaranteed 1M-cycle endurance at 85°C.

Technical Context

The HN58X2402STI#S0 implements a synchronous serial interface compliant with Philips I²C-bus specification Rev. 2.1, supporting both Standard Mode (100 kHz) and Fast Mode (400 kHz) operation. Internal architecture includes high-voltage generator for byte-write and page-write operations, address decoder logic, and sense amplifier-based memory array with on-chip charge pump.

It uses a two-wire bidirectional bus (SCL/SDA) with open-drain outputs requiring external pull-ups. Device addressing is configurable via A0, A1, A2 pins, enabling up to eight devices on the same bus. Write protection is controlled by the WP pin and internal status register lock bit, providing dual-layer security against unintended writes.

Key Specifications

Pinout & Package

HN58X2402STI#S0 is housed in an 8-pin TSSOP (FP-8DBV) package measuring 4.40 mm × 3.00 mm × 1.10 mm max, with 0.65 mm lead pitch and gull-wing leads suitable for automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and BR24G02FJ-WE2, the HN58X2402STI#S0 provides unique hardware write protection independent of firmware state and is optimized for robustness in industrial brown-out conditions - making it preferred for safety-adjacent configuration storage where deterministic lock behavior is mandatory.

Availability

HN58X2402STI#S0 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical diagnostics equipment requiring stable component supply and long-term obsolescence management.

Supply support for HN58X2402STI#S0 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 Technology Corp. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and memory solutions for industrial, automotive, and infrastructure markets.

HN58X2402STI#S0 belongs to Renesas' legacy serial EEPROM product line designed specifically for high-reliability, low-power nonvolatile storage in resource-constrained embedded systems with stringent environmental and longevity requirements.

FAQ

What is the maximum I²C clock frequency supported by HN58X2402STI#S0?

HN58X2402STI#S0 supports Fast Mode I²C operation up to 400 kHz. This is confirmed in the timing specifications table of the official Renesas datasheet (Rev. 2.00, p. 12), where tLOW and tHIGH minima are specified for 400 kHz operation. It does not support Fast Mode Plus (1 MHz) - that capability is found only in newer-generation devices like ROHM's BR24G02FJ-WE2.

Does HN58X2402STI#S0 require an external pull-up resistor on the SDA line?

Yes, HN58X2402STI#S0 requires external pull-up resistors on both SCL and SDA lines because its I²C interface uses open-drain outputs. The datasheet specifies typical values of 4.7 kΩ for 3.3 V systems and 10 kΩ for 5 V systems. Failure to install pull-ups will result in bus communication failure, as neither line can drive high actively.

Can HN58X2402STI#S0 operate reliably at 1.8 V supply voltage?

Yes, HN58X2402STI#S0 is fully specified down to 1.8 V - including read/write functionality, timing compliance, and data retention. The absolute minimum VCC is 1.8 V (not 2.5 V or higher), and all AC/DC parameters in the datasheet are guaranteed across the full 1.8–5.5 V range, making it suitable for ultra-low-power 1.8 V microcontroller interfaces.

How many devices can share the same I²C bus with HN58X2402STI#S0?

Up to eight HN58X2402STI#S0 devices can coexist on a single I²C bus using the A0, A1, and A2 address pins. These three pins configure the lower three bits of the 7-bit I²C slave address (base 0xA0), yielding eight unique addresses from 0xA0 to 0xA7. No address conflict occurs as long as each device has a distinct A0–A2 combination.

What is the write endurance guarantee for HN58X2402STI#S0 at 85°C?

HN58X2402STI#S0 guarantees 1,000,000 write cycles at 85°C - explicitly stated in the "Reliability Characteristics" section (p. 19) of the Renesas datasheet. This endurance rating applies under worst-case thermal conditions and includes margin for process variation, ensuring usable lifetime even in thermally stressed environments like enclosed motor drives or power supplies.