Renesas ISL88003IE23Z-TK

Overview

ISL88003IE23Z-TK from Renesas Electronics is an ultra-low-power 3-pin voltage supervisor IC with push-pull active-high reset output, 2.32V fixed threshold, ±1.2% accuracy, 160nA supply current, and 190ms power-on reset timeout-designed for reliable power-up sequencing in battery-powered microcontroller systems.

For engineers reviewing the ISL88003IE23Z-TK datasheet, ISL88003IE23Z-TK pinout, ISL88003IE23Z-TK application, or ISL88003IE23Z-TK equivalent, key selection criteria include reset polarity compatibility, VDD operating range down to 1V, SC-70 package footprint constraints, and direct replacement suitability for MAX803/809/810-based designs.

Technical Context

The ISL88003IE23Z-TK implements a precision bandgap reference and comparator-based supervision circuit that asserts a high-level RST signal when VDD falls below 2.32V (±1.2%) or during initial power-up until VDD exceeds threshold for ≥190ms. It operates across -40°C to +85°C with no external components required.

Its push-pull RST output drives directly to VDD (HIGH) during reset assertion and to GND (LOW) otherwise, eliminating need for external pull-up resistors-unlike open-drain alternatives such as ISL88002. Reset validity extends down to VDD = 1V, enabling robust brownout detection in low-voltage systems.

Key Specifications

Pinout & Package

ISL88003IE23Z-TK is housed in a Pb-free 3-lead SC-70 plastic package (JEDEC MO-203AA, Renesas pkg drawing P3.049), measuring 2.0mm × 2.1mm × 0.9mm with gull-wing leads. The compact outline supports high-density layout in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3801K32DBVR, the ISL88003IE23Z-TK delivers lowest power consumption (160nA vs. 800nA–1.2µA) and native push-pull active-high output-enabling direct drop-in replacement in existing MAX803/809/810 layouts without schematic or firmware changes.

Availability

ISL88003IE23Z-TK is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical sensors, and industrial handheld terminals requiring stable component supply with long-term lifecycle support.

Supply support for ISL88003IE23Z-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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The ISL88003 belongs to Renesas' ultra-low-power voltage supervisor product line, engineered specifically for battery-operated and energy-harvesting systems demanding sub-200nA quiescent current and high-threshold accuracy.

FAQ

What is the reset output configuration of ISL88003IE23Z-TK?

The ISL88003IE23Z-TK features a push-pull active-high reset output. When VDD drops below 2.32V or during initial power-up, the RST pin drives HIGH to VDD; once VDD stabilizes above threshold for ≥190ms, RST drives LOW to GND. This eliminates need for external pull-up resistors and ensures clean, fast reset signaling compatible with most modern microcontrollers.

Does ISL88003IE23Z-TK support operation below 1.8V?

Yes, ISL88003IE23Z-TK maintains valid reset functionality down to VDD = 1V, though its specified operating range is 1.8V to 2.75V for 2.32V threshold variants. Below 1.8V, the device continues asserting reset reliably-critical for detecting deep brownout conditions in Li-ion battery applications where voltage sags to ~1.2V before cutoff.

Is ISL88003IE23Z-TK pin-compatible with MAX809?

No-while ISL88003IE23Z-TK is functionally comparable to MAX809 and shares the same SC-70 package outline, it is not pin-compatible due to differing reset polarity: MAX809 provides active-low open-drain output requiring external pull-up, whereas ISL88003IE23Z-TK delivers active-high push-pull output. Direct substitution requires verification of MCU reset pin logic requirements.

What is the typical power-on reset timeout for ISL88003IE23Z-TK?

The ISL88003IE23Z-TK has a nominal power-on reset timeout of 190ms, with guaranteed minimum and maximum values of 140ms and 260ms respectively across -40°C to +85°C. This delay ensures sufficient time for microcontroller core voltage stabilization, oscillator startup, and internal register initialization before releasing the reset signal.

Can ISL88003IE23Z-TK be used in place of ISL88001IE23Z-TK?

Yes, ISL88003IE23Z-TK can replace ISL88001IE23Z-TK in designs requiring active-high reset, as both share identical 2.32V threshold, SC-70 package, and electrical specifications. The key distinction is output type: ISL88001IE23Z-TK provides active-low push-pull RST, while ISL88003IE23Z-TK provides active-high push-pull RST-so substitution depends solely on target MCU reset pin polarity requirements.