Renesas ISL88017IHTZ-T

Overview

ISL88017IHTZ-T 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 across -40°C to +85°C and supports brownout detection in battery-powered embedded systems.

For engineers reviewing the ISL88017IHTZ-T datasheet, ISL88017IHTZ-T pinout, ISL88017IHTZ-T application, or ISL88017IHTZ-T equivalent, key selection criteria include programmable trip point resolution, RST/MR dual-function pin behavior, reset validity down to VDD = 0.8V, hysteresis stability, and TSOT-23 package compatibility with high-density PCB layouts.

Technical Context

The ISL88017IHTZ-T implements a precision bandgap reference and comparator-based monitoring architecture with internal POR circuitry that asserts reset at VDD = 1V. Its voltage trip point is set via three digital-configurable VSET pins (VSET1–VSET3), each accepting GND/VDD/floating states to select one of 26 discrete thresholds.

TwinPin™ technology enables bidirectional signal handling on RST/MR: it sources a weak pull-up (100kΩ) to VDD when inactive and sinks current when asserted low during reset, while also accepting debounced active-low manual reset pulses ≥10µs wide. Reset deassertion requires VDD to exceed the programmed VTH for tPOR = 140–280ms.

Key Specifications

Pinout & Package

ISL88017IHTZ-T is housed in a RoHS-compliant 6-lead TSOT-23 package (MDP0049), measuring 2.90mm × 2.80mm × 1.00mm, with gull-wing leads and matte tin termination compatible with SnPb and Pb-free reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT27+T and TPS3808G12DBVR, the ISL88017IHTZ-T offers unique value through factory-programmable trip points without external components, TwinPin™ integration reducing pin count, and guaranteed reset validity down to 0.8V - making it optimal for cost-sensitive, space-limited, and multi-rail embedded designs requiring flexibility and reliability.

Availability

ISL88017IHTZ-T is available at Aetrix Electronics and suitable for process control systems, intelligent instruments, and portable/battery-powered equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ISL88017IHTZ-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

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-T belongs to Intersil's voltage supervisor product line, designed specifically for low-power, high-accuracy supply monitoring in space-constrained industrial and portable electronics where programmability and minimal external components are critical.

FAQ

What is the minimum VDD voltage at which ISL88017IHTZ-T guarantees reset assertion?

The ISL88017IHTZ-T guarantees valid reset assertion down to VDD = 0.8V, ensuring fail-safe operation during deep brownout conditions where many supervisors lose functionality. This specification is confirmed in the Electrical Specifications table under "Reset Signal Valid Down to VDD = 0.8V" and applies across the full industrial temperature range. The ISL88017IHTZ-T maintains accurate threshold comparison and output drive capability even at this low supply level.

How does the TwinPin™ feature work on ISL88017IHTZ-T?

The TwinPin™ feature integrates active-low reset output and manual reset input onto the single RST/MR pin of ISL88017IHTZ-T. Internally, a 100kΩ pull-up resistor connects to VDD, so the pin floats high when inactive. When VDD falls below the programmed trip point, the output sinks current to pull the pin low. Simultaneously, the pin accepts debounced active-low pulses ≥10µs to trigger manual reset. No external components are required for either function, and the ISL88017IHTZ-T handles signal directionality automatically.

Can ISL88017IHTZ-T be reprogrammed after soldering to the PCB?

No, the ISL88017IHTZ-T voltage trip point must be set before power application and cannot be dynamically reprogrammed during operation. The VSET1–VSET3 pins are sampled at power-up and latched; changing their states while VDD is biased may cause undefined behavior or latch-up. Reprogramming requires cycling VDD power after modifying VSET connections (e.g., via solder jumpers or DIP switches). This behavior is explicitly stated in the Principles of Operation section: "Do not attempt to reprogram a VTH while the IC is biased."

What is the reset timeout delay (tPOR) for ISL88017IHTZ-T and how is it affected by temperature?

The ISL88017IHTZ-T has a guaranteed POR timeout delay (tPOR) of 140–280ms at +25°C, with typical variation shown in Figure 8 of the datasheet. Over the full -40°C to +85°C range, tPOR remains within this spec limit - Figure 8 confirms tPOR stays between 193ms and 204ms across temperature, demonstrating tight process control. This stable delay ensures reliable microcontroller initialization regardless of ambient conditions, and the ISL88017IHTZ-T does not require external timing components to achieve it.

Does ISL88017IHTZ-T require external decoupling capacitors for stable operation?

The ISL88017IHTZ-T does not require external decoupling capacitors for basic operation, as its internal design includes immunity to power-supply transients and built-in hysteresis (1% of VTH) to suppress noise-induced false resets. However, the datasheet notes that "optional VDD de-coupling capacitance can be added to filter transients if needed," particularly in electrically noisy environments. A standard 0.1µF ceramic capacitor placed close to the VDD and GND pins is recommended for robustness in industrial applications, though the ISL88017IHTZ-T will function correctly without it.