Renesas ISL88001IH22Z-TK

Overview

ISL88001IH22Z-TK from Renesas Electronics is an ultra-low-power 3-pin voltage supervisor IC with push-pull active-low reset output, 2.19V fixed threshold (±1.2% accuracy), 160nA supply current, and 190ms power-on reset timeout. It monitors VDD in battery-powered microcontroller systems where reliable brownout detection and minimal quiescent current are critical.

For engineers reviewing the ISL88001IH22Z-TK datasheet, ISL88001IH22Z-TK pinout, ISL88001IH22Z-TK application, or ISL88001IH22Z-TK equivalent, key selection criteria include its 2.19V trip point, SC-70/SOT-23 package compatibility, reset validity down to VDD = 1V, and immunity to power-supply transients in portable embedded designs.

Technical Context

The ISL88001IH22Z-TK implements a factory-programmed bandgap reference comparator with hysteresis to prevent noise-induced reset chatter. Its internal POR circuit asserts reset at VDD = 1V and holds it for 190ms after VDD exceeds 2.19V, ensuring stable MCU initialization.

This device operates across -40°C to +85°C, consumes only 160nA at 1.8V, and delivers a push-pull RST output with VOL ≤ 0.4V (sinking 0.5mA) and VOH ≥ VDD–0.4V - eliminating external pull-up components required by open-drain alternatives.

Key Specifications

Pinout & Package

ISL88001IH22Z-TK 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. The compact footprint supports space-constrained portable designs while maintaining thermal resistance θ_JA = 590°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G12DBVR, the ISL88001IH22Z-TK provides tighter threshold accuracy (±1.2% vs. ±2.5%), lower supply current (160nA vs. >1µA), and push-pull output eliminating external components - making it optimal for space- and energy-constrained 2.2V rail supervision.

Availability

ISL88001IH22Z-TK is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered sensor nodes, and portable medical devices requiring stable component supply and long-term lifecycle support.

Supply support for ISL88001IH22Z-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 automotive, industrial, and IoT markets.

The ISL88001 series belongs to Renesas' ultra-low-power voltage supervisor product line, designed specifically for battery-operated and energy-harvesting systems requiring sub-µA quiescent current and precise fixed-threshold monitoring.

FAQ

What is the exact reset threshold voltage of the ISL88001IH22Z-TK?

The ISL88001IH22Z-TK has a nominal reset threshold voltage of 2.19V, with guaranteed accuracy of ±1.2% over the full operating temperature range (-40°C to +85°C). This value is factory-programmed and does not require external calibration or adjustment. The device asserts reset when VDD falls below this threshold and releases reset after VDD rises above it for the 190ms POR timeout period. This precision enables reliable supervision of 2.2V logic rails in portable electronics.

Does the ISL88001IH22Z-TK require external components for basic operation?

No, the ISL88001IH22Z-TK requires no external components for standard operation. Its push-pull active-low RST output eliminates the need for an external pull-up resistor, unlike open-drain alternatives such as the ISL88002. The device integrates all necessary reference, comparator, and timing circuitry internally. Only decoupling capacitance on VDD is recommended per best practices - no resistors, capacitors, or trim components are needed to achieve specified performance including 2.19V threshold accuracy and 190ms POR timeout.

What package type and dimensions does the ISL88001IH22Z-TK use?

The ISL88001IH22Z-TK uses a Pb-free 3-lead SOT-23 package (JEDEC TO-236, Renesas package drawing P3.064), with body dimensions of 2.92mm × 1.30mm × 1.00mm and 0.95mm lead pitch. This compact surface-mount footprint is identical to industry-standard SOT-23-3 packages, enabling drop-in replacement in existing layouts. Thermal resistance is θ_JA = 590°C/W, supporting operation in thermally constrained handheld and wearable applications without heatsinking.

How does the ISL88001IH22Z-TK behave during deep brownout conditions?

The ISL88001IH22Z-TK maintains valid reset assertion down to VDD = 1V, ensuring continued supervision even during severe brownout events where supply voltage collapses below normal operating range. When VDD drops below 2.19V, the push-pull RST output drives LOW and remains asserted until VDD recovers above threshold for the full 190ms timeout. This behavior prevents microcontroller runaway, data corruption, or undefined state transitions in battery-powered systems experiencing end-of-life voltage sag or transient load dumps.

Is the ISL88001IH22Z-TK pin-compatible with other members of the ISL8800x family?

Yes, the ISL88001IH22Z-TK is pin-compatible with all ISL88001 variants in the same SOT-23 package, including ISL88001IH46Z-TK (4.62V) and ISL88001IH16Z-TK (1.58V), as well as with ISL88002 and ISL88003 SOT-23 versions. All share identical 3-pin SOT-23 pinout (GND, RST, VDD) and mechanical footprint. However, functional differences exist: ISL88001 offers push-pull RST, ISL88002 uses open-drain RST, and ISL88003 provides push-pull active-high RST - requiring schematic review before substitution.