Renesas ISL88001IH29Z-TK

Overview

ISL88001IH29Z-TK from Renesas Electronics is an ultra-low-power 3-lead voltage supervisor IC with a fixed 2.92V reset threshold, push-pull active-low RST output, ±1.2% threshold accuracy, and 190ms power-on reset timeout - used to ensure reliable microprocessor startup and brownout protection in battery-powered embedded systems.

For engineers reviewing the ISL88001IH29Z-TK datasheet, ISL88001IH29Z-TK pinout, ISL88001IH29Z-TK application, or ISL88001IH29Z-TK equivalent, key selection considerations include its 160nA supply current, operation down to VDD = 1V, SOT-23-3 package compatibility, and direct functional alignment with legacy supervisors like MAX809.

Technical Context

The ISL88001IH29Z-TK implements a precision bandgap-based voltage reference and comparator architecture to monitor VDD against a factory-trimmed 2.92V trip point with 1% hysteresis, ensuring noise-immune reset assertion during supply transients. Its internal POR circuit activates at VDD ≥ 1V and holds RST asserted for ≥140ms after VDD exceeds threshold.

This device operates across –40°C to +85°C with no external components required, delivering stable reset timing and low drift (0.48mV/°C) while consuming only 160nA typical supply current at 1.8V–5.5V input range - optimized for always-on monitoring in portable and industrial control applications.

Key Specifications

Pinout & Package

ISL88001IH29Z-TK is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236), with 0.95mm lead pitch, 2.92mm × 1.30mm body size, and MSL3 reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with MAX809SEUR+T and TPS3801K33DBVR, the ISL88001IH29Z-TK delivers 7.5× lower supply current than MAX809 and 11× lower than TPS3801 while maintaining adequate accuracy for 3.0V rail monitoring - making it optimal for energy-constrained, long-life embedded systems.

Availability

ISL88001IH29Z-TK is available at Aetrix Electronics and suitable for microprocessor power-up control, battery-powered sensor nodes, industrial PLC I/O modules, handheld medical devices, and portable instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for ISL88001IH29Z-TK 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 is a global semiconductor leader delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and IoT markets.

The ISL88001IH29Z-TK belongs to Renesas' Ultra Low Power Voltage Supervisor family, designed specifically to replace legacy reset ICs in space- and energy-constrained applications while maintaining pin and functional compatibility.

FAQ

What is the reset output type and polarity of the ISL88001IH29Z-TK?

The ISL88001IH29Z-TK features an active-low push-pull reset output (RST pin). When VDD falls below 2.92V or during power-on reset, RST is driven LOW; when VDD is above threshold and stable, RST is driven HIGH. This eliminates the need for an external pull-up resistor and allows direct connection to microprocessor nRESET inputs.

Does the ISL88001IH29Z-TK require any external components to operate?

No, the ISL88001IH29Z-TK requires no external components. It integrates a precision voltage reference, comparator, POR timer, and push-pull output driver. Only VDD, GND, and the RST load (e.g., µP nRESET) are needed - simplifying design, reducing BOM cost, and minimizing PCB footprint.

What is the minimum supply voltage at which the ISL88001IH29Z-TK can assert a valid reset signal?

The ISL88001IH29Z-TK asserts a valid reset signal down to VDD = 1V. Its internal POR circuit activates at this level, and the RST output remains functional (with VOL ≤ 0.4V and VOH ≥ VDD – 0.4V) across the full 1.8V–5.5V operating range - enabling supervision during deep brownout events.

How does the ISL88001IH29Z-TK compare to the MAX809 in terms of pin compatibility and performance?

The ISL88001IH29Z-TK is pin-compatible with the MAX809 in SOT-23-3 packaging and provides identical active-low push-pull reset functionality. However, it improves upon the MAX809 with ±1.2% threshold accuracy (vs. ±2.5%), 160nA supply current (vs. 1.2µA), and operation down to VDD = 1V - making ISL88001IH29Z-TK a drop-in upgrade for energy-sensitive designs.

What is the temperature coefficient of the reset threshold voltage for the ISL88001IH29Z-TK?

The ISL88001IH29Z-TK has a voltage threshold temperature coefficient of 0.48mV/°C, measured across –40°C to +85°C. This low drift ensures stable 2.92V trip point performance over industrial temperature ranges - critical for applications where thermal variation could otherwise cause premature or delayed reset assertion.