Renesas ISL88002IH46Z-T

Overview

ISL88002IH46Z-T from Renesas Electronics is an ultra-low-power voltage supervisor IC with open-drain active-low reset output, 4.62V fixed threshold, ±1.2% accuracy over -40°C to +85°C, 160nA supply current, and 190ms power-on reset timeout - used for reliable power-up sequencing and brownout protection in microcontroller-based portable systems.

For engineers reviewing the ISL88002IH46Z-T datasheet, ISL88002IH46Z-T pinout, ISL88002IH46Z-T application, or ISL88002IH46Z-T equivalent, key selection considerations include reset output type (open-drain), VDD trip point tolerance, minimum operating voltage (1V), thermal stability of threshold, and compatibility with SOT-23 footprint constraints.

Technical Context

The ISL88002IH46Z-T implements a precision bandgap reference and comparator architecture to monitor VDD against a factory-trimmed 4.62V threshold with 1% hysteresis. It asserts reset when VDD falls below VTHVDD or during initial power-up at VDD ≥ 1V.

Its open-drain RST output requires an external pull-up resistor (5kΩ–100kΩ) and remains low until VDD exceeds the threshold for the full 190ms POR timeout period. The device operates down to 1V supply and maintains reset validity across the full industrial temperature range.

Key Specifications

Pinout & Package

ISL88002IH46Z-T is housed in a 3-lead SOT-23 package (JEDEC TO-236, pkg drawing P3.064), with 1.30mm × 2.37mm body size, 0.95mm lead pitch, and 0.38mm max height - compatible with standard SOT-23 reflow profiles and pick-and-place tooling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SUR+T and TPS3808G33DBVR, the ISL88002IH46Z-T delivers superior ultra-low-power operation (160nA vs >1µA), tighter threshold accuracy (±1.2% vs ±2.5%), and native SOT-23-3 open-drain compatibility - making it optimal for long-life, space-constrained, and multi-device reset-bus designs.

Availability

ISL88002IH46Z-T is available at Aetrix Electronics and suitable for microcontroller power-up sequencing, battery-powered IoT sensor nodes, and industrial controller brownout protection requiring stable component supply and long-term lifecycle support.

Supply support for ISL88002IH46Z-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 high-performance analog, mixed-signal, and embedded processing solutions for automotive, industrial, and IoT markets.

The ISL88002IH46Z-T belongs to Renesas' Ultra Low Power Voltage Supervisor family, engineered specifically for energy-sensitive applications where precision reset timing, minimal quiescent current, and small-footprint reliability are critical.

FAQ

What is the reset output configuration of the ISL88002IH46Z-T?

The ISL88002IH46Z-T features an active-low open-drain RST output. This requires an external pull-up resistor (typically 5kΩ–100kΩ) to define the high state. The output sinks current when reset is asserted (RST = LOW) and presents high impedance otherwise. This configuration enables wired-OR reset buses and flexible logic-level interfacing - a key differentiator from push-pull alternatives like the ISL88001IH46Z-T.

Does the ISL88002IH46Z-T require any external components to function?

No, the ISL88002IH46Z-T operates autonomously with no external components required for basic supervision. Only an external pull-up resistor on the RST pin is needed due to its open-drain output architecture. No capacitors, resistors, or trimming networks are necessary for threshold setting, timing, or biasing - simplifying design and reducing BOM cost and board area.

What is the minimum supply voltage at which the ISL88002IH46Z-T can assert a valid reset signal?

The ISL88002IH46Z-T guarantees valid reset assertion down to VDD = 1V. This means that even when the monitored supply sags deeply - such as during battery depletion or transient overload - the device continues to monitor and assert RST correctly. Its internal circuitry remains functional and accurate across the full 1V–5.5V operating range specified in the datasheet.

How does the ISL88002IH46Z-T handle power supply noise or transients?

The ISL88002IH46Z-T incorporates internal noise immunity design, including built-in hysteresis (1% of VTHVDD) and filtering that prevents false resets caused by fast-rising or high-frequency supply transients. Its 15µs propagation delay (tRPD) and monotonic threshold response ensure robust operation in electrically noisy environments like motor drives or switching power supplies - without requiring additional external RC filtering.

Is the ISL88002IH46Z-T pin-compatible with other members of the ISL8800x family?

Yes - the ISL88002IH46Z-T shares identical 3-lead SOT-23 pinout (GND–RST–VDD) with all ISL88001/002/003 variants in SOT-23 packaging, including ISL88001IH46Z-T (push-pull) and ISL88003IH46Z-T (push-pull active-high). This allows direct substitution in existing layouts when changing reset polarity or output type, provided the external pull-up is removed for push-pull versions.