Renesas ISL88001IH17Z-T7A

Overview

ISL88001IH17Z-T7A from Renesas Electronics is an ultra-low-power 3-lead voltage supervisor IC with push-pull active-low reset output, 1.67V fixed threshold, ±1.2% accuracy, 190ms power-on reset timeout, and operation down to VDD = 1V. It monitors single-supply rails in battery-powered microcontroller systems requiring reliable brownout detection and POR.

For engineers reviewing the ISL88001IH17Z-T7A datasheet, ISL88001IH17Z-T7A pinout, ISL88001IH17Z-T7A application, or ISL88001IH17Z-T7A equivalent, this device delivers precise low-voltage supervision in space-constrained portable designs where supply current below 160nA and guaranteed reset assertion at 1V are critical selection criteria.

Technical Context

The ISL88001IH17Z-T7A implements a factory-trimmed bandgap reference and comparator-based monitoring circuit that asserts reset when VDD falls below 1.67V (±1.2%) and holds reset for ≥190ms after VDD rises above threshold. Its internal POR circuit activates at VDD = 1V to ensure system initialization under weak-battery conditions.

This variant belongs to the ISL88001 family and features a push-pull RST output-unlike ISL88002 (open-drain) or ISL88003 (push-pull active-high)-making it directly compatible with microcontrollers expecting active-low reset signals without external pull-up resistors.

Key Specifications

Pinout & Package

ISL88001IH17Z-T7A is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236, pkg drawing P3.064), with 0.95mm pitch, 2.92mm × 1.30mm body, and 0.46mm max height. The package supports both SnPb and Pb-free reflow profiles per J-STD-020 MSL1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3801K33DBVR, the ISL88001IH17Z-T7A uniquely combines 1.67V precision, 160nA quiescent current, and push-pull RST in SOT-23 - enabling smaller, longer-life, and more robust supervision for 1.8V systems without external components.

Availability

ISL88001IH17Z-T7A is available at Aetrix Electronics and suitable for battery-powered IoT sensors, handheld medical devices, and industrial microcontroller modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for ISL88001IH17Z-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

Renesas Electronics is a global semiconductor leader delivering high-performance analog, mixed-signal, and embedded processing solutions for automotive, industrial, and IoT markets.

The ISL88001 series was designed specifically for ultra-low-power voltage supervision in portable and energy-constrained systems, emphasizing sub-200nA operation, factory-trimmed accuracy, and minimal external component requirements.

FAQ

What is the exact reset threshold voltage of the ISL88001IH17Z-T7A?

The ISL88001IH17Z-T7A has a nominal reset threshold of 1.67V with ±1.2% accuracy over the full –40°C to +85°C temperature range. At +25°C, the typical value is 1.670V, with min/max bounds of 1.650V and 1.690V respectively. This threshold is factory-trimmed and does not require external adjustment.

Does the ISL88001IH17Z-T7A require an external pull-up resistor on the RST pin?

No, the ISL88001IH17Z-T7A features a push-pull active-low RST output, meaning it actively drives LOW during reset and HIGH (VDD–0.2V) otherwise. Unlike open-drain supervisors such as the ISL88002, no external pull-up resistor is needed - simplifying layout and reducing BOM cost.

Can the ISL88001IH17Z-T7A operate when the supply voltage drops below 1.8V?

Yes - the ISL88001IH17Z-T7A guarantees valid reset assertion down to VDD = 1V. Its POR circuit activates at 1V, and the reset signal remains asserted until VDD exceeds 1.67V for ≥190ms. This makes it suitable for deep brownout detection in Li-ion or coin-cell applications where voltage sags below 1.8V occur.

Is the ISL88001IH17Z-T7A pin-compatible with the MAX809 series?

Yes, the ISL88001IH17Z-T7A is pin-compatible with MAX809, MAX803, and MAX810 in the SOT-23-3 package. However, note functional differences: ISL88001IH17Z-T7A provides push-pull RST and 1.67V threshold, whereas MAX809 variants offer different thresholds (e.g., MAX809S = 3.08V) and open-drain outputs - verify threshold match before substitution.

What is the thermal resistance (θJA) of the ISL88001IH17Z-T7A in its SOT-23 package?

The ISL88001IH17Z-T7A in the 3-lead SOT-23 package has a typical junction-to-ambient thermal resistance (θJA) of 590°C/W when mounted on a standard FR-4 board in free air. This value assumes standard JEDEC test conditions and supports reliable operation up to +85°C ambient without heatsinking.