Renesas ISL88002IH29Z-T7A

Overview

ISL88002IH29Z-T7A from Renesas Electronics is an ultra-low-power 3-pin voltage supervisor IC with open-drain active-low reset output, 2.92V fixed threshold, ±1.2% accuracy, 160nA supply current, and 190ms power-on reset timeout-designed for brownout detection in battery-powered microcontroller systems.

For engineers reviewing the ISL88002IH29Z-T7A datasheet, ISL88002IH29Z-T7A pinout, ISL88002IH29Z-T7A application, or ISL88002IH29Z-T7A equivalent, this page delivers verified circuit role, package mapping, thermal specs, reset timing behavior, and drop-in alternatives for industrial embedded designs requiring reliable low-voltage supervision.

Technical Context

The ISL88002IH29Z-T7A implements a precision bandgap-based voltage reference comparator with internal hysteresis (1%) to prevent noise-induced reset chatter during VDD transients. It asserts reset when VDD falls below 2.92V and holds reset until VDD exceeds the threshold for ≥190ms after crossing 1V during power-up.

Its open-drain RST output requires an external pull-up resistor (5kΩ–100kΩ) and sinks up to 0.5mA at 0.4V max VOL, enabling wired-OR reset bus configurations and compatibility with mixed-voltage logic domains. Reset remains valid down to VDD = 1V, ensuring robust POR even under severe brownout conditions.

Key Specifications

Pinout & Package

ISL88002IH29Z-T7A is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236), measuring 2.92mm × 1.30mm × 1.00mm with 0.95mm lead pitch. Thermal resistance θJA = 590°C/W enables operation in compact, unventilated enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G18DBVR, the ISL88002IH29Z-T7A delivers superior energy efficiency (160nA vs µA-range), tighter threshold accuracy (±1.2% vs ±2.5%), and exact 2.92V match for 3.0V rails-making it optimal for space-constrained, long-life industrial and portable designs where minimal BOM and guaranteed POR timing are critical.

Availability

ISL88002IH29Z-T7A is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart energy meters, automotive body control modules, and battery-backed RTU applications requiring stable component supply across multi-year production cycles.

Supply support for ISL88002IH29Z-T7A 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, low-power microcontrollers, analog, and power management solutions for industrial, automotive, and IoT markets.

The ISL88002IH29Z-T7A belongs to Renesas' Ultra Low Power Voltage Supervisor family, engineered specifically for reliable power sequencing and brownout protection in space- and energy-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of the ISL88002IH29Z-T7A and how tightly is it specified?

The ISL88002IH29Z-T7A has a nominal reset threshold of 2.92V, with guaranteed accuracy of ±1.2% over the full -40°C to +85°C operating temperature range. This specification is confirmed in the Electrical Specifications table on page 8 of FN6174 Rev 3.00, where VTHVDD for "Ix29" variants is listed as 2.850V to 3.000V (min/max) at temperature extremes, centered at 2.925V typical at +25°C.

Does the ISL88002IH29Z-T7A require any external components to function as a voltage supervisor?

No, the ISL88002IH29Z-T7A requires no external components for basic voltage supervision and power-on reset functionality. However, because it features an open-drain RST output, an external pull-up resistor (5kΩ–100kΩ) to the host logic rail is mandatory to establish a defined HIGH state when reset is inactive-this is explicitly stated in the Pin Descriptions section on page 2 of FN6174 Rev 3.00.

What is the power-on reset timeout duration for the ISL88002IH29Z-T7A and is it adjustable?

The ISL88002IH29Z-T7A provides a fixed 190ms power-on reset timeout (tPOR), with a typical range of 140ms to 260ms per the Electrical Specifications table on page 9 of FN6174 Rev 3.00. This timeout is internally generated and non-adjustable-no external capacitor or resistor can modify it, ensuring consistent reset timing across all units without calibration.

Can the ISL88002IH29Z-T7A operate reliably when the supply voltage drops below 1.8V?

Yes-the ISL88002IH29Z-T7A guarantees reset assertion and functional validity down to VDD = 1V, as stated in the datasheet introduction and confirmed in the Absolute Maximum Ratings and Electrical Specifications sections. While its recommended supply range starts at 1.8V for full parameter compliance, the reset signal remains active and electrically valid even as VDD collapses to 1V, enabling fail-safe behavior during extreme brownouts.

Is the ISL88002IH29Z-T7A pin-compatible with other members of the ISL8800x family?

Yes-the ISL88002IH29Z-T7A shares identical 3-lead SOT-23 pinout (GND, RST, VDD) and mechanical footprint with all ISL88001/002/003 variants in the same package, including ISL88001IH29Z-T7A (push-pull RST) and ISL88003IH29Z-T7A (push-pull active-high RST). This allows direct substitution within the same family when only reset polarity or output type differs, provided host circuitry accommodates the RST drive mode.