Renesas ISL88003IE31Z-TK

Overview

ISL88003IE31Z-TK from Renesas Electronics is an ultra-low-power 3-pin voltage supervisor IC with push-pull active-high reset output, fixed 3.07V threshold (±1.2% accuracy), 160nA supply current, and 190ms power-on reset timeout. It monitors VDD in microcontroller systems where reliable brownout detection and clean startup sequencing are critical.

For engineers reviewing the ISL88003IE31Z-TK datasheet, ISL88003IE31Z-TK pinout, ISL88003IE31Z-TK application, or ISL88003IE31Z-TK equivalent, key selection criteria include reset polarity compatibility, SC-70 package footprint constraints, VDD supervision down to 1V, and direct replacement feasibility for MAX803/809/810-series supervisors in space-constrained portable designs.

Technical Context

The ISL88003IE31Z-TK implements a factory-trimmed bandgap reference comparator with hysteresis to detect falling VDD below its 3.07V trip point and assert a high-going RST signal. Its internal POR circuit activates at VDD = 1V, ensuring reset assertion during initial power ramp-up.

Unlike open-drain variants (e.g., ISL88002), the ISL88003IE31Z-TK uses a push-pull output stage delivering VOH = VDD − 0.4V (min) and VOL = 0.4V (max) under load, eliminating external pull-up resistors and simplifying interface with 3.3V/5V logic inputs.

Key Specifications

Pinout & Package

ISL88003IE31Z-TK is housed in a Pb-free 3-lead SC-70 package (JEDEC MO-203AA, pkg drawing P3.049), measuring 2.20mm × 1.35mm × 0.95mm with 0.65mm lead pitch. This compact footprint supports high-density PCB layouts in handheld and medical devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G30DBVR, the ISL88003IE31Z-TK delivers superior energy efficiency (160nA vs ≥800nA), eliminates external components, and provides guaranteed reset validity down to 1V-critical for edge AI inference nodes operating near battery cutoff.

Availability

ISL88003IE31Z-TK is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for ISL88003IE31Z-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 specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and IoT markets.

The ISL88003IE31Z-TK belongs to Renesas' Ultra Low Power Voltage Supervisor family, designed specifically to replace legacy reset ICs in space- and power-constrained embedded systems without sacrificing accuracy or reliability.

FAQ

What is the exact reset threshold voltage of the ISL88003IE31Z-TK and how tightly is it specified?

The ISL88003IE31Z-TK has a nominal reset threshold of 3.07V, with a guaranteed tolerance of ±1.2% over the full −40°C to +85°C temperature range. At +25°C, the typical value is 3.075V, and the min/max limits are 3.000V and 3.150V respectively. This precision enables reliable supervision of 3.0V and 3.3V rails without margining concerns.

Does the ISL88003IE31Z-TK require any external components to operate?

No, the ISL88003IE31Z-TK operates autonomously with only three connections: VDD, GND, and RST. Its push-pull active-high output eliminates the need for an external pull-up resistor, and its internal POR circuit requires no external timing capacitors. Decoupling capacitance on VDD is recommended but not mandatory for basic functionality.

How does the ISL88003IE31Z-TK behave during power-up and brownout conditions?

At power-up, the ISL88003IE31Z-TK asserts RST LOW when VDD reaches 1V and holds it for 190ms (tPOR). Once VDD exceeds 3.07V, RST transitions HIGH. During brownout, RST goes LOW again when VDD falls below 3.07V and remains LOW until VDD rises above 3.07V + hysteresis (≈3.10V) for tPOR duration.

Is the ISL88003IE31Z-TK pin-compatible with other members of the ISL8800x family?

Yes, the ISL88003IE31Z-TK shares identical SC-70 pinout and footprint with all ISL88001/88002/88003 variants, including ISL88001IE31Z-TK (push-pull active-low) and ISL88002IE31Z-TK (open-drain active-low). Only the reset polarity and output structure differ-no PCB redesign is needed when swapping within the same threshold variant.

What is the maximum supply voltage the ISL88003IE31Z-TK can monitor, and what happens below 1.8V?

The ISL88003IE31Z-TK is rated for VDD operation from 1.8V to 5.5V. Below 1.8V, the device remains functional down to VDD = 1V-during which it guarantees valid reset assertion-but electrical specifications (e.g., threshold accuracy, tPOR) are not guaranteed per datasheet. Operation below 1V is undefined.