Renesas ISL88002IH17Z-T

Overview

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

For engineers reviewing the ISL88002IH17Z-T datasheet, ISL88002IH17Z-T pinout, ISL88002IH17Z-T application, or ISL88002IH17Z-T equivalent, key selection criteria include its open-drain RST output requiring external pull-up, SC-70/SOT-23 package compatibility, 1.67V trip point for low-voltage rails, and immunity to power-supply transients in portable electronics designs.

Technical Context

The ISL88002IH17Z-T implements a precision bandgap-based voltage reference comparator with internal hysteresis to prevent reset chatter during noisy supply transitions. Its POR circuit asserts reset at VDD = 1V and holds it until VDD exceeds 1.67V for ≥190ms, ensuring stable initialization of downstream logic.

As an open-drain variant in the ISL8800x family, it drives RST low during reset assertion and requires an external pull-up resistor (5kΩ–100kΩ) to define the high-state voltage level. It shares identical threshold accuracy, temperature coefficient (0.48mV/°C), and operating range (−40°C to +85°C) with its push-pull counterparts but differs in output drive architecture and load capability.

Key Specifications

Pinout & Package

ISL88002IH17Z-T is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236, pkg drawing P3.064), measuring 2.92mm × 1.30mm × 1.00mm with 0.95mm lead pitch. This compact footprint supports high-density PCB layouts in handheld and wearable devices.

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 ISL88002IH17Z-T delivers superior energy efficiency for long-life battery applications and exact 1.67V trip matching for modern low-voltage microcontrollers, though it requires a pull-up resistor that adds one passive component.

Availability

ISL88002IH17Z-T is available at Aetrix Electronics and suitable for microcontroller power management, portable medical sensors, and industrial I/O modules requiring stable component supply across extended production lifecycles.

Supply support for ISL88002IH17Z-T 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with expertise in analog, power, and timing products.

The ISL8800x family was engineered specifically for ultra-low-power voltage supervision in battery-critical applications, emphasizing nanoscale current consumption, factory-trimmed threshold accuracy, and robust transient immunity in minimal 3-lead packages.

FAQ

What is the reset threshold voltage of the ISL88002IH17Z-T?

The ISL88002IH17Z-T has a fixed reset threshold voltage of 1.67V with ±1.2% accuracy over −40°C to +85°C. This value is factory-trimmed and specified in the Electrical Specifications table on page 8 of FN6174 Rev 3.00. The device asserts reset when VDD falls below this threshold and releases it after VDD exceeds 1.67V for ≥190ms.

Does the ISL88002IH17Z-T require an external pull-up resistor on the RST pin?

Yes, the ISL88002IH17Z-T features an open-drain RST output and requires an external pull-up resistor between RST and VDD. Renesas recommends values from 5kΩ to 100kΩ depending on bus capacitance and rise-time requirements. This configuration enables wired-OR reset buses and voltage-level translation, unlike push-pull alternatives.

What is the minimum supply voltage at which the ISL88002IH17Z-T can assert a valid reset signal?

The ISL88002IH17Z-T guarantees reset assertion down to VDD = 1V, as stated in the datasheet's Features section and confirmed in the Absolute Maximum Ratings table. This ensures fail-safe operation during deep brownout conditions where other supervisors may cease functioning, making it suitable for low-voltage battery applications.

Is the ISL88002IH17Z-T pin-compatible with the MAX809 series?

No, the ISL88002IH17Z-T is not pin-compatible with the MAX809 series. While both are 3-lead SOT-23 voltage supervisors, the ISL88002IH17Z-T uses Pin 1 = GND, Pin 2 = RST, Pin 3 = VDD, whereas MAX809 variants use Pin 1 = VDD, Pin 2 = GND, Pin 3 = RST. Physical pinout reversal prevents direct replacement without PCB redesign.

What is the typical supply current of the ISL88002IH17Z-T at 1.8V VDD?

The typical supply current of the ISL88002IH17Z-T is 160nA when VDD = 1.8V and VTHVDD = 1.67V, as specified in the Electrical Specifications table under IDD test conditions. This ultra-low quiescent current is measured across the full industrial temperature range and enables multi-year operation on primary lithium cells.