Renesas ISL88017IHTZ-TK

Overview

ISL88017IHTZ-TK from Intersil is a pin-selectable voltage supervisor IC designed for supply voltage monitoring and power-on reset control in low-power embedded systems. It features a programmable trip point range of 2.15V to 4.65V in 100mV steps, ±2% threshold 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 VDD down to 1V for valid reset assertion.

For engineers reviewing the ISL88017IHTZ-TK datasheet, ISL88017IHTZ-TK pinout, ISL88017IHTZ-TK application, or ISL88017IHTZ-TK equivalent, key selection considerations include its 6-pin TSOT-23 package, programmable trip point configuration via three VSET pins, reset validity at VDD ≥ 1V, integrated 100kΩ pull-up on RST/MR, and immunity to power-supply transients without external components.

Technical Context

The ISL88017IHTZ-TK implements a precision bandgap reference and comparator-based supervision architecture with hysteresis to prevent chatter during brownout conditions. Its POR circuit asserts reset at VDD = 1V and holds it for 140–280ms (tPOR) after VDD exceeds the programmed threshold.

Proprietary TwinPin™ technology enables dual functionality on Pin 6 (RST/MR): it serves as both an open-drain active-low reset output (with internal 100kΩ pull-up to VDD) and a debounced active-low manual reset input requiring <100mV for ≥10µs. All three VSET pins (Pins 3–5) accept GND/VDD/floating states to configure the trip point per the documented 27-code table.

Key Specifications

Pinout & Package

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

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-TK uniquely combines programmable trip points, TwinPin™ manual reset, ultra-low current, and zero external components - making it optimal for cost-sensitive, space-limited, and field-serviceable embedded systems.

Availability

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

Supply support for ISL88017IHTZ-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

Intersil Corporation is a leading provider of precision analog and power management solutions, acquired by Renesas Electronics in 2017. Its products serve industrial, infrastructure, and high-end consumer markets with emphasis on reliability and performance.

The ISL88017IHTZ-TK belongs to Intersil's voltage supervisor product line, engineered specifically for low-power, high-accuracy supply monitoring in space-constrained embedded systems where programmability and minimal external components are critical.

FAQ

What is the minimum VDD voltage at which ISL88017IHTZ-TK asserts a valid reset signal?

The ISL88017IHTZ-TK asserts a valid reset signal down to VDD = 1V, as confirmed by the Power-On Reset (POR) circuit activation threshold. This ensures reliable reset generation even during severe brownout conditions or low-voltage startup sequences. The reset remains asserted until VDD rises above the programmed trip point and sustains that level for the tPOR delay (140–280ms). This behavior is guaranteed across the full -40°C to +85°C operating range and is independent of VSET configuration. The ISL88017IHTZ-TK maintains functional reset timing and output drive strength down to this 1V limit.

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

The RST/MR pin (Pin 6) of the ISL88017IHTZ-TK integrates active-low reset output and manual reset input using Intersil's proprietary TwinPin™ technology. As a reset output, it functions as an open-drain driver pulled up internally to VDD via 100kΩ; it pulls LOW when VDD falls below the programmed trip point. As a manual reset input, it detects active-low pulses <100mV lasting ≥10µs - such as from a push-button to GND - and triggers a full POR cycle. The ISL88017IHTZ-TK handles both functions concurrently without external circuitry, and the internal debounce logic prevents false triggers from contact bounce.

Can ISL88017IHTZ-TK be used with a 1.8V supply rail?

No - the ISL88017IHTZ-TK is not specified for operation on a 1.8V supply rail as a monitored voltage. Its minimum programmable trip point is 2.15V, and its electrical specifications (e.g., VOL, tPOR, IDD) are characterized only for VDD ≥ 2.25V in the datasheet. While the device may power up at 1.8V, reset assertion would occur immediately and continuously since VDD < VTH, and key parameters like supply current and reset delay are not guaranteed below 2.25V. For 1.8V rail monitoring, the ISL88016 variant (1.60V–2.85V range) is the appropriate selection. The ISL88017IHTZ-TK requires VDD ≥ 2.25V for valid operation.

What is the maximum number of unique trip points supported by ISL88017IHTZ-TK?

The ISL88017IHTZ-TK supports 27 unique trip points, derived from all valid combinations of its three VSET pins (VSET1–VSET3), each configurable as GND, VDD, or floating. The datasheet's "Power-On Reset Voltage Setting" table explicitly lists 27 entries covering 2.15V to 4.65V in 100mV increments, with reserved codes excluded. Each combination has been factory-characterized for ±2% accuracy over temperature. No additional trip points exist beyond these 27 - configurations like all-VDD or all-GND are reserved and not functional. The ISL88017IHTZ-TK delivers exactly these 27 validated thresholds with no interpolation or user calibration required.

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

No - the ISL88017IHTZ-TK requires no external components for basic voltage supervision and reset generation. Its internal bandgap reference, comparator, POR timer, and 100kΩ RST/MR pull-up resistor eliminate the need for external passives. Only the VSET pins must be connected (to GND, VDD, or left floating) to set the trip point - no resistors, capacitors, or diodes are needed. This zero-component requirement is confirmed in the datasheet's "No External Components Necessary" feature and validated across all operating conditions. Optional decoupling capacitance on VDD may be added for transient filtering, but it is not required for ISL88017IHTZ-TK functionality.