Renesas HN58X2404STI#S0

Overview

HN58X2404STI#S0 from Renesas Technology Corp. is a 4-kbit I²C-compatible serial EEPROM organized as 512 × 8 bits, featuring write protection via hardware (WP pin) and software (write enable latch), 1.8 V to 5.5 V supply operation, and endurance of 1,000,000 write cycles - deployed in industrial control panels for nonvolatile parameter storage.

For engineers reviewing the HN58X2404STI#S0 datasheet, HN58X2404STI#S0 pinout, HN58X2404STI#S0 application, or HN58X2404STI#S0 equivalent, key selection criteria include I²C bus timing compliance (t_LOW ≥ 4.7 µs, t_HIGH ≥ 4.0 µs at 100 kHz), byte/page write time (max 5 ms), WP-controlled hardware lock, and TSSOP-8 package compatibility with space-constrained embedded systems.

Technical Context

This device implements a standard two-wire I²C interface with fixed 7-bit device address (1010xxx₂, where xxx = A2/A1/A0 pins), supports both random and sequential read modes, and uses on-chip charge pump for internal high-voltage generation during write/erase operations. It includes an address generator, X/Y decoders, and sense amplifiers for memory array access.

Write protection is enforced at two levels: hardware via the WP pin (active-low, latched when V_CC < 0.8 V), and software via the Write Enable Latch (WEL) bit in the internal status register. The memory array is segmented into 64 pages of 8 bytes each, enabling page-write capability up to 8 bytes per cycle.

Key Specifications

Pinout & Package

HN58X2404STI#S0 is housed in an 8-pin TSSOP (FP-8DBV) package, 4.4 mm × 3.0 mm footprint, 0.65 mm pitch, suitable for automated SMT assembly and thermal cycling in industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C04D-SSHM-T and M95040-DRMN6TP/K, the HN58X2404STI#S0 provides deterministic hardware-level write blocking via the WP pin - eliminating race conditions during power loss and simplifying qualification for safety-critical applications where software-only protection is insufficient.

Availability

HN58X2404STI#S0 is available at Aetrix Electronics and suitable for industrial control panels, medical instrumentation, automotive body electronics, and smart metering systems requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.

Supply support for HN58X2404STI#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.

The HN58X2404STI#S0 belongs to Renesas' legacy serial EEPROM product line, designed specifically for robust, low-power, and pin-efficient nonvolatile storage in space- and reliability-constrained embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the HN58X2404STI#S0?

The HN58X2404STI#S0 supports standard-mode I²C operation up to 100 kHz only. Its timing specifications - including t_LOW ≥ 4.7 µs and t_HIGH ≥ 4.0 µs - are validated for this speed. It does not meet fast-mode (400 kHz) or fast-mode plus (1 MHz) timing requirements, and attempting higher frequencies may result in missed ACKs or write failures. Always verify SCL rise/fall times against the 10–90% thresholds specified in the HN58X2404STI#S0 datasheet.

Does the HN58X2404STI#S0 require an external pull-up resistor on the SDA line?

Yes, the HN58X2404STI#S0 requires an external pull-up resistor on the SDA line (and optionally on SCL) because its I²C interface uses open-drain outputs. A 4.7 kΩ resistor to VCC is recommended for 100 kHz operation with typical bus capacitance (<400 pF). Omitting the pull-up will prevent proper ACK generation and cause communication timeouts. The HN58X2404STI#S0 itself does not integrate internal pull-ups.

How does hardware write protection work on the HN58X2404STI#S0?

Hardware write protection on the HN58X2404STI#S0 is controlled by the WP (Write Protect) pin: when WP is driven low, all write, erase, and status register modification commands are ignored - even if the internal Write Enable Latch (WEL) is set. This function remains active down to V_CC = 0.8 V, ensuring reliable lockout during brown-out. The HN58X2404STI#S0 ignores all write attempts while WP is asserted, making it ideal for factory-programmed configurations.

Can the HN58X2404STI#S0 be used with a 1.8 V microcontroller?

Yes, the HN58X2404STI#S0 operates across 1.8 V to 5.5 V, making it fully compatible with 1.8 V microcontrollers. Its I²C logic thresholds scale with VCC, so at 1.8 V, V_IL ≤ 0.54 V and V_IH ≥ 1.26 V - well within standard 1.8 V GPIO output ranges. No level shifter is needed. However, ensure the MCU's SDA/SCL drivers can sink sufficient current (≥3 mA) to meet the HN58X2404STI#S0's VOL specification under worst-case bus loading.

What is the difference between byte-write and page-write modes in the HN58X2404STI#S0?

Byte-write mode writes one byte per I²C transaction (START → ADDR → BYTE → STOP), taking up to 5 ms per byte. Page-write mode allows up to 8 consecutive bytes (one page) to be written in a single transaction, completing in ≤5 ms total - improving efficiency by up to 8×. The HN58X2404STI#S0's internal address counter auto-increments within the same page boundary (0–7, 8–15, etc.), but wraps at page edge. Exceeding 8 bytes triggers a new page write cycle.