Renesas ISL88017IHTZ-T7A

Overview

ISL88017IHTZ-T7A from Intersil is a pin-selectable voltage supervisor IC with programmable reset threshold from 2.15V to 4.65V in 100mV steps, ±2% accuracy over temperature, ultra-low 3µA supply current, and TwinPin™ integration of active-low reset output and manual reset input on a single terminal. It operates down to VDD = 0.8V and is used in battery-powered embedded systems requiring reliable power-on reset and brownout protection.

For engineers reviewing the ISL88017IHTZ-T7A datasheet, ISL88017IHTZ-T7A pinout, ISL88017IHTZ-T7A application, or ISL88017IHTZ-T7A equivalent, key selection criteria include programmable trip point range (2.15–4.65V), reset validity at low VDD (0.8V), integrated 100kΩ pull-up on RST/MR, hysteresis-enabled noise immunity, and TSOT-23-6 RoHS-compliant packaging for space-constrained designs.

Technical Context

The ISL88017IHTZ-T7A implements a precision bandgap reference and comparator-based voltage monitoring architecture with internal POR circuitry that asserts reset at VDD = 1V. Its three VSET pins enable discrete threshold programming without external resistors, and hysteresis prevents chatter during slow-rising/falling supply transitions.

TwinPin™ technology merges manual reset assertion and active-low reset output into one bidirectional pin with debounced input logic and open-drain output stage, eliminating need for external pull-up or debounce components while maintaining compatibility with standard push-button interfaces and microcontroller reset inputs.

Key Specifications

Pinout & Package

ISL88017IHTZ-T7A is housed in a Pb-free, RoHS-compliant 6-lead TSOT-23 package (MDP0049), measuring 2.90mm × 2.80mm × 1.00mm, with gull-wing leads and 0.95mm pitch. The package supports reflow soldering per IPC/JEDEC J-STD-020 at peak temperatures up to +260°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT46+T and TPS3808G33DBVR, the ISL88017IHTZ-T7A uniquely delivers field-programmable trip points, integrated manual reset, and sub-4µA operation in the same 6-pin TSOT-23 footprint-making it optimal for multi-voltage platforms and battery-sensitive designs where flexibility and ultra-low power are co-priorities.

Availability

ISL88017IHTZ-T7A is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial handheld terminals requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for ISL88017IHTZ-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

Intersil Corporation is a leading provider of precision analog and power management solutions, acquired by Renesas Electronics in 2017 and now part of its Analog Power Business Unit.

The ISL88017IHTZ-T7A belongs to Intersil's voltage supervisor product line, designed specifically for low-power, high-accuracy supply monitoring in space- and energy-constrained embedded systems where programmability and reliability are essential.

FAQ

What is the minimum VDD voltage at which ISL88017IHTZ-T7A can assert a valid reset signal?

The ISL88017IHTZ-T7A asserts a valid reset signal down to VDD = 0.8V, as confirmed in the datasheet's "Reset Signal Valid Down to VDD = 0.8V" feature and Electrical Specifications table. This ensures fail-safe operation during deep brownout conditions where many competing supervisors cease functioning. The ISL88017IHTZ-T7A maintains accurate threshold comparison and output drive capability even at this ultra-low supply level.

How does the TwinPin™ function work on the RST/MR pin of ISL88017IHTZ-T7A?

The RST/MR pin on ISL88017IHTZ-T7A combines active-low reset output and manual reset input using Intersil's proprietary TwinPin™ technology. Internally, it features an open-drain output stage with a 100kΩ pull-up to VDD and a debounced active-low input stage. When VDD falls below the programmed threshold, the pin pulls low; when externally pulled below 100mV for ≥10µs, it triggers a manual reset. The ISL88017IHTZ-T7A handles both functions without external components or conflict.

Can ISL88017IHTZ-T7A be reprogrammed to a different voltage trip point while powered?

No, the ISL88017IHTZ-T7A must not be reprogrammed while biased. As stated in the Principles of Operation section, "Do not attempt to reprogram a VTH while the IC is biased." Changing VSET pin states (GND/VDD/floating) during operation may cause undefined reset behavior or temporary loss of supervision. Reprogramming should occur only during power-off or initial power-up before VDD stabilizes above 1V.

What is the guaranteed reset timeout delay (tPOR) for ISL88017IHTZ-T7A across temperature?

The ISL88017IHTZ-T7A guarantees a power-on reset timeout delay (tPOR) of 140ms minimum to 280ms maximum over the full industrial temperature range (–40°C to +85°C), as specified in the Electrical Specifications table. Figure 8 in the datasheet confirms tPOR remains within this band across temperature, with typical values near 200ms at +25°C. This ensures consistent system initialization timing regardless of ambient conditions for the ISL88017IHTZ-T7A.

Does ISL88017IHTZ-T7A require external capacitors or resistors for basic operation?

No, the ISL88017IHTZ-T7A requires no external components for core supervision functionality. Its internal bandgap reference, comparator, POR circuit, and 100kΩ RST/MR pull-up eliminate the need for external resistors, capacitors, or diodes. Only the VSET pins need static connection (GND/VDD/floating) to set the trip point. Optional VDD decoupling capacitance may be added for transient filtering, but it is not required for ISL88017IHTZ-T7A operation.