Renesas ISL88011IH529Z-TK

Overview

ISL88011IH529Z-TK from Intersil is a 5-lead SOT-23 voltage supervisor IC with fixed 2.92V VDD monitoring threshold, adjustable Power-On Reset timeout via CPOR pin, complementary active-low and active-high reset outputs (RST/MR and RST), manual reset input, and operation down to VDD = 1V. It delivers ultra-low 5.5µA supply current and ±1.5% threshold accuracy over –40°C to +85°C, used for reliable µP/µC power sequencing in embedded control systems.

For engineers reviewing the ISL88011IH529Z-TK datasheet, ISL88011IH529Z-TK pinout, ISL88011IH529Z-TK application, or ISL88011IH529Z-TK equivalent, key selection considerations include its fixed 2.92V trip point, dual reset output polarity, CPOR-based POR timeout extension capability, immunity to supply transients, and compatibility with low-voltage microcontroller reset requirements.

Technical Context

The ISL88011IH529Z-TK implements a precision bandgap reference and comparator-based supervision architecture with hysteresis (29mV at 2.92V) to prevent noise-induced false resets. Its internal POR circuit activates at VDD ≥ 1V and holds reset asserted until VDD exceeds 2.92V for ≥200ms (typical).

Reset assertion logic combines VDD monitoring only (no VMON or WDI functionality), manual reset debouncing, and CPOR capacitor-controlled timeout extension. The device lacks watchdog timer and adjustable voltage monitor inputs - those features are exclusive to ISL88013/ISL88014/ISL88015 variants per datasheet functional table.

Key Specifications

Pinout & Package

ISL88011IH529Z-TK uses a Pb-free 5-lead SOT-23 package (JEDEC MO-178AA, Intersil pkg drawing P5.064), measuring 2.90 × 1.60 × 1.10 mm with gull-wing leads and 0.95 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT29D3+T and TPS3808G33DBVR, the ISL88011IH529Z-TK uniquely provides both complementary reset outputs and CPOR-based timeout extension - enabling precise power sequencing control without adding discrete timing components or sacrificing low-power operation.

Availability

ISL88011IH529Z-TK is available at Aetrix Electronics and suitable for industrial PLC power sequencing, battery-powered IoT sensor nodes, medical infusion pump controllers, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for ISL88011IH529Z-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 (now part of Renesas Electronics) is a leader in precision analog and power management ICs, delivering high-reliability solutions for industrial, computing, and communications markets.

The ISL88011IH529Z-TK belongs to Intersil's ISL8801x family of voltage supervisors, designed specifically for robust, low-power power-on reset and supply monitoring in space-constrained embedded systems.

FAQ

What is the exact reset threshold voltage of the ISL88011IH529Z-TK?

The ISL88011IH529Z-TK has a factory-programmed fixed VDD reset threshold of 2.92V, with ±1.5% accuracy over the full –40°C to +85°C operating temperature range. This value is confirmed in the Ordering Information table (page 3) and Electrical Specifications (page 6) of FN8093 Rev 5.00, where VTHVDD for IH529Z devices is specified as 2.88V (min), 2.92V (typ), and 2.96V (max). The ISL88011IH529Z-TK does not support adjustable VMON monitoring.

Does the ISL88011IH529Z-TK include a watchdog timer function?

No, the ISL88011IH529Z-TK does not include a watchdog timer. Watchdog functionality is exclusive to the ISL88013 and ISL88015 variants per the Product Features Table (page 5) and Functional Block Diagrams (page 4). The ISL88011IH529Z-TK pinout omits WDI, and its block diagram shows only VDD monitoring, POR, and manual reset circuits - confirming absence of watchdog timer logic.

How do I extend the Power-On Reset timeout for the ISL88011IH529Z-TK?

Connect an external capacitor between the CPOR pin (pin 5) and GND. Per Figure 3 (page 9), a 30pF capacitor extends the nominal 200–250ms POR timeout to approximately 2.5s. Capacitor value directly scales tPOR - larger values yield longer delays. Ensure low-stray-capacitance PCB layout, as parasitic capacitance contributes to total CPOR capacitance and affects timing accuracy.

What are the reset output configurations supported by the ISL88011IH529Z-TK?

The ISL88011IH529Z-TK provides two complementary reset outputs: RST (pin 3) is a push-pull active-high output that drives VDD when released and GND when asserted; RST/MR (pin 1) is an open-drain active-low output requiring an external pull-up resistor. This dual-output architecture allows direct interfacing with both standard µP reset inputs (active-low) and ASICs requiring active-high assertion, without level-shifting components.

Is the ISL88011IH529Z-TK RoHS compliant and Pb-free?

Yes, the ISL88011IH529Z-TK is Pb-free and RoHS compliant. Per the Ordering Information table (page 3) and Notes section (page 3), it uses 100% matte tin plating (e3 termination finish) and conforms to IPC/JEDEC J-STD-020 reflow standards. The "Z" suffix in the part number explicitly denotes Pb-free packaging, and the device is rated MSL1 for moisture sensitivity.