Renesas HN58X25256TI#S0

Overview

HN58X25256TI#S0 from Renesas Electronics is a 256-kbit (32-kword × 8-bit) Serial Peripheral Interface (SPI) EEPROM featuring MONOS memory technology, 1.8 V to 5.5 V single-supply operation, 5 MHz max clock frequency at ≥2.5 V, 32-byte page write capability, and industrial −40°C to +85°C temperature range. It serves as nonvolatile configuration storage in embedded controllers and power management units.

For engineers reviewing the HN58X25256TI#S0 datasheet, HN58X25256TI#S0 pinout, HN58X25256TI#S0 application, or HN58X25256TI#S0 equivalent, this device supports SPI Mode 0/3, offers hardware/software data protection via W and status register bits, delivers 1,000k write cycles and 100-year data retention at 25°C, and integrates HOLD and WRITE PROTECT functions for robust system-level reliability.

Technical Context

This SPI EEPROM implements a serial interface compliant with SPI bus standards (Mode 0 and Mode 3), using a 16-bit address space with automatic address increment during READ and page-aligned WRITE operations. Its internal architecture includes a high-voltage generator, Y/X decoders, sense amplifiers, and serial-parallel conversion logic enabling byte- and page-level access.

The device employs MONOS (Metal-Oxide-Nitride-Oxide-Silicon) charge-trapping memory cells fabricated on a CMOS process, delivering low-power active and standby current (≤3.5 mA write, ≤2.0 μA standby), fast 5 ms write cycle time, and immunity to inadvertent writes during power transitions via integrated power-on reset and VCC ramp-rate control requirements.

Key Specifications

Pinout & Package

HN58X25256TI#S0 is housed in an 8-pin plastic SOP package (JEITA code FP-8DBV, Renesas code PRSP0008DF-B), with 150-mil width, gull-wing leads, Ni/Pd/Au plating, and 0.08 g typical mass. Pin 1 is marked with a dot or bevelled corner; pin numbering follows standard top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25SF041-SSHD-B and M95M02-DRMN6TP/K, HN58X25256TI#S0 provides optimal balance of density, industrial-grade reliability (1M cycles, 100-year retention), HOLD functionality, and pin-compatible SOP-8 footprint-making it preferred for mission-critical embedded configuration storage where deterministic control and long-term data integrity are essential.

Availability

HN58X25256TI#S0 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for HN58X25256TI#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 Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and memory solutions for industrial, automotive, and infrastructure markets.

HN58X25256TI#S0 belongs to the R1EX25xxx family of SPI EEPROMs designed specifically for robust, low-power, long-life nonvolatile storage in harsh environments-leveraging MONOS technology to exceed traditional EEPROM endurance and retention specifications.

FAQ

What is the maximum clock frequency supported by HN58X25256TI#S0 at 1.8 V?

At 1.8 V supply, HN58X25256TI#S0 supports a maximum clock frequency of 3 MHz, as specified in the AC Characteristics table for VCC = 1.8 V to 5.5 V. This ensures reliable SPI communication in low-voltage systems while maintaining timing margins for setup/hold compliance. The device automatically adapts to lower frequencies at reduced VCC to preserve signal integrity and data accuracy during read and write operations.

Does HN58X25256TI#S0 support SPI Mode 0 and Mode 3 simultaneously?

Yes, HN58X25256TI#S0 is explicitly compatible with both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as stated in the datasheet Features section. The device does not require configuration to select mode; it responds correctly to either clock polarity and phase combination, enabling seamless integration with diverse host controllers without firmware adaptation.

How does the HOLD function behave when chip select (S) is deasserted during hold condition?

If chip select (S) is driven high while HN58X25256TI#S0 is in HOLD condition, the device resets its internal state and exits hold mode. The datasheet confirms that deselecting during hold acts as a reset mechanism, clearing any pending instruction context. Therefore, S must remain low throughout the hold period to maintain paused communication; unintended S deassertion will terminate the hold and require reinitialization of the SPI sequence.

What protection mechanisms prevent accidental writes during power-up or power-down of HN58X25256TI#S0?

HN58X25256TI#S0 incorporates a dedicated power-on reset (POR) circuit that inhibits write operations during VCC transitions. Per datasheet guidance, it requires S to be held at VCC during ramp-up/down, mandates VCC turn-on from ground level, enforces ≤2 μs/V ramp rate, and specifies waiting tW after WRITE/WRSR before power-off. These measures collectively suppress false triggers from noise on S or W pins during unstable supply conditions.

Is the HN58X25256TI#S0 pinout identical to industry-standard SPI EEPROMs in SOP-8 packages?

Yes, HN58X25256TI#S0 uses the standard 8-pin SOP pinout defined for SPI EEPROMs: Pin 1 = VCC, Pin 2 = HOLD, Pin 3 = S, Pin 4 = VSS, Pin 5 = D, Pin 6 = Q, Pin 7 = W, Pin 8 = C. This matches JEDEC MS-012 and common equivalents like AT25xxx and 25AAxxx families, enabling drop-in replacement in existing layouts where voltage and timing specs align.