Renesas HN58X2432FPI#S4

Overview

HN58X2432FPI#S4 from Renesas Electronics (formerly Hitachi) is a 32-kbit two-wire serial EEPROM with I²C-compatible interface, organized as 4096 × 8-bit, operating from 1.8 V to 5.5 V and supporting 400 kHz clock frequency. It features 32-byte page write capability, 10⁵ write cycles endurance, and 10-year data retention - deployed in consumer audio equipment, camcorders, and cellular handsets for configuration storage and calibration data.

For engineers reviewing the HN58X2432FPI#S4 datasheet, HN58X2432FPI#S4 pinout, HN58X2432FPI#S4 application, or HN58X2432FPI#S4 equivalent, key selection considerations include its SOP-8 (FP-8DB) package, write-protect functionality via WP pin, device address flexibility using A0–A2 pins, and compatibility with standard I²C bus timing including tLOW ≥1200 ns and tHIGH ≥600 ns.

Technical Context

This EEPROM implements a two-wire I²C serial interface with fixed 4-bit device code "1010", 3-bit hardware-selectable device address (A0–A2), and R/W bit - enabling up to eight devices on one bus. Its internal architecture includes CMOS logic, MNOS memory cells, and low-voltage circuitry for reliable operation across –40°C to +85°C.

It supports three read modes (current address, random, sequential) and two write modes (byte and page), with automatic address incrementing during page writes and acknowledge polling to detect write completion. The WP pin enables hardware-level protection of upper memory segments: for HN58X2432FPI#S4, high WP protects the upper 8 kbit (25% of 32 kbit).

Key Specifications

Pinout & Package

HN58X2432FPI#S4 is housed in an 8-pin plastic SOP package (Hitachi FP-8DB / JEDEC MS-012AC), measuring 4.89 mm × 3.90 mm × 1.73 mm (max height), with gull-wing leads and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C32D-SSHM-T and BR24T32FJ-WE2, HN58X2432FPI#S4 offers proven reliability in Hitachi/Renesas consumer platforms, deterministic 10 ms write timing at 2.7–5.5 V, and hardware WP pin routing aligned with legacy board layouts - making it optimal for cost-sensitive, volume-manufactured audio and mobile devices.

Availability

HN58X2432FPI#S4 is available at Aetrix Electronics and suitable for consumer electronics, industrial sensor nodes, and portable medical devices requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for HN58X2432FPI#S4 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, formed from the merger of NEC Electronics and Renesas Technology, is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

HN58X2432FPI#S4 belongs to Renesas' legacy serial EEPROM product line, designed specifically for cost-effective, low-power nonvolatile storage in consumer-grade electronics - emphasizing robustness under variable supply conditions and seamless integration with 8-/16-bit microcontrollers.

FAQ

What is the memory organization of HN58X2432FPI#S4?

HN58X2432FPI#S4 contains 32,768 bits of EEPROM memory organized as 4096 words × 8 bits. This structure supports byte-aligned access and simplifies addressing in microcontroller firmware - each read or write operation targets a single 8-bit location, with internal address counters automatically incrementing during sequential operations. The full address space spans 0x0000 to 0x0FFF.

Does HN58X2432FPI#S4 support standard I²C bus timing?

Yes, HN58X2432FPI#S4 fully complies with standard-mode I²C specifications: maximum clock frequency of 400 kHz, minimum SCL low time of 1200 ns, minimum SCL high time of 600 ns, and bus free time of 1300 ns. It also incorporates 50 ns noise suppression on SCL and SDA inputs, ensuring robust operation in electrically noisy environments without external filtering.

How does the Write Protect (WP) pin function on HN58X2432FPI#S4?

On HN58X2432FPI#S4, the WP pin provides hardware-level write protection for the upper 8 kbit (addresses 0x800–0xFFF) when driven high. When WP is low, full read/write access is enabled. WP has no latching behavior - its state is sampled continuously during write attempts. This allows dynamic protection of critical configuration zones while permitting runtime updates to user-adjustable parameters in lower memory.

What package type is used for HN58X2432FPI#S4?

HN58X2432FPI#S4 is supplied in an 8-pin plastic SOP package designated FP-8DB (Hitachi code), conforming to JEDEC MS-012AC. Its dimensions are 4.89 mm × 3.90 mm × 1.73 mm max height, with 1.27 mm lead pitch and gull-wing leads. This package is compatible with standard reflow soldering profiles and widely supported by PCB assembly houses.

Can HN58X2432FPI#S4 operate reliably at 1.8 V?

Yes, HN58X2432FPI#S4 is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, it maintains I²C compatibility (with reduced clock tolerance), supports page writes (15 ms cycle time), and delivers guaranteed read/write functionality across –40°C to +85°C. Its low-voltage design eliminates need for level shifters when interfacing with 1.8 V FPGAs or ultra-low-power MCUs.