Renesas ISL88002IH17Z-TK

Overview

ISL88002IH17Z-TK from Renesas Electronics is an ultra-low-power, open-drain active-low voltage supervisor IC designed for power-on reset and supply voltage monitoring in space-constrained systems. It features a 1.67V fixed reset threshold (±1.2% accuracy), 160nA supply current at 1.8V, 190ms power-on reset timeout, and operates down to VDD = 1V. It is used in battery-powered microcontroller systems to ensure reliable startup and brownout protection.

For engineers reviewing the ISL88002IH17Z-TK datasheet, ISL88002IH17Z-TK pinout, ISL88002IH17Z-TK application, or ISL88002IH17Z-TK equivalent, key selection criteria include its SOT-23-3 open-drain output configuration, 1.67V trip point for low-voltage logic rails, guaranteed operation at 1V supply, and compatibility with portable equipment requiring sub-200nA quiescent current.

Technical Context

The ISL88002IH17Z-TK implements a precision bandgap-based voltage reference and comparator circuit to monitor VDD against a factory-trimmed 1.67V threshold. Its internal POR circuit asserts reset at VDD ≥ 1V and holds it for a minimum 140ms timeout before release.

As an open-drain RST output, it requires an external pull-up resistor (5kΩ–100kΩ) and sinks up to 10mA. The device includes hysteresis (1%) to prevent noise-induced chatter and maintains ±1.2% threshold accuracy across –40°C to +85°C.

Key Specifications

Pinout & Package

ISL88002IH17Z-TK is housed in a 3-lead SOT-23 plastic package (JEDEC TO-236, pkg drawing P3.064), with 100% matte tin (e3) termination, MSL3 rated, and compatible with SnPb and Pb-free reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G16DBVR, the ISL88002IH17Z-TK delivers 7× lower supply current and native open-drain output for bus sharing-critical for ultra-low-power and multi-IC reset coordination-but lacks adjustable delay or enable functionality.

Availability

ISL88002IH17Z-TK is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical sensors, and industrial PLC I/O modules requiring stable component supply with long-term lifecycle support.

Supply support for ISL88002IH17Z-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 high-performance analog, mixed-signal, and embedded processing solutions for industrial, automotive, and infrastructure markets.

The ISL88002IH17Z-TK belongs to Renesas' ultra-low-power voltage supervisor family, engineered specifically for battery-operated and energy-harvesting systems demanding nanowatt-level supervision with high threshold accuracy and minimal board area.

FAQ

What is the exact reset threshold voltage of the ISL88002IH17Z-TK and how stable is it over temperature?

The ISL88002IH17Z-TK has a nominal reset threshold of 1.67V with ±1.2% accuracy over the full –40°C to +85°C industrial temperature range. Its voltage threshold temperature coefficient is 0.48mV/°C, resulting in less than ±15mV total drift across temperature-verified per FN6174 Rev 3.00 electrical specifications table.

Does the ISL88002IH17Z-TK require an external pull-up resistor on the RST pin, and what value is recommended?

Yes, the ISL88002IH17Z-TK features an open-drain RST output and requires an external pull-up resistor. The datasheet specifies a recommended range of 5kΩ to 100kΩ, with typical designs using 10kΩ to 47kΩ depending on bus capacitance and rise-time requirements. The ISL88002IH17Z-TK sinks ≤0.4V at 0.5mA when asserted.

Can the ISL88002IH17Z-TK operate reliably when the supply voltage drops below 1.8V?

Yes-the ISL88002IH17Z-TK guarantees valid reset assertion down to VDD = 1.0V, and its POR circuit activates at that level. It continues to monitor and assert reset as long as VDD remains below 1.67V, making it suitable for deep brownout detection in 1.8V systems where supply may sag to 1.2V or lower.

Is the ISL88002IH17Z-TK pin-compatible with other members of the ISL8800x family, and what are the key functional differences?

The ISL88002IH17Z-TK shares identical SOT-23-3 pinout with ISL88001 and ISL88003 variants, but differs functionally: ISL88001 uses push-pull RST, ISL88002 uses open-drain RST (as in ISL88002IH17Z-TK), and ISL88003 uses push-pull active-high RST. All share same VDD/GND/RST pin assignments and 1.67V threshold option.

What is the power-on reset timeout duration for the ISL88002IH17Z-TK, and is it adjustable?

The ISL88002IH17Z-TK provides a fixed 190ms typical power-on reset timeout (tPOR), with min/max values of 140ms/260ms over temperature. This delay is factory-programmed and non-adjustable-designed to ensure sufficient time for oscillator stabilization and FPGA configuration before releasing the reset signal.