Renesas ISL88011IH526Z-TK

Overview

ISL88011IH526Z-TK from Renesas Electronics (formerly Intersil) is a 5-lead SOT-23 voltage supervisor IC with fixed 2.63 V VDD monitoring threshold, active-low and active-high reset outputs, adjustable power-on reset timeout via external capacitor, manual reset input, and ultra-low 5.5 µA supply current. It ensures reliable microprocessor power-up sequencing in battery-powered embedded systems.

For engineers reviewing the ISL88011IH526Z-TK datasheet, ISL88011IH526Z-TK pinout, ISL88011IH526Z-TK application, or ISL88011IH526Z-TK equivalent, key selection criteria include ±1.5% threshold accuracy over temperature, reset validity down to VDD = 1 V, 200 ms nominal POR delay (adjustable), dual reset polarity support, and immunity to power-supply transients.

Technical Context

The ISL88011IH526Z-TK implements a precision bandgap-based voltage reference comparator with hysteresis (26 mV at 2.63 V trip point) to monitor VDD only - it lacks VMON, WDI, or watchdog functionality found in other family members. Its CPOR pin enables external capacitor-based extension of the 200 ms power-on reset timeout, supporting FPGA configuration timing or slow-ramping supplies.

It provides complementary push-pull RST and open-drain RST/MR outputs, allowing direct interface with both high- and low-active logic domains without external pull-ups. Reset assertion occurs on power-up, brownout below 2.63 V, or manual MR activation, with reset deassertion requiring VDD > 2.63 V for tPOR duration.

Key Specifications

Pinout & Package

Package: 5-lead SOT-23 (Pb-free, RoHS-compliant, JEDEC MO-178AA / EIAJ SC-74 compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UR26-T and TPS3808G33DBVR, the ISL88011IH526Z-TK uniquely delivers factory-trimmed 2.63 V accuracy with dual-polarity reset outputs in a single SOT-23-5 package - eliminating design compromises between precision, interface compatibility, and component count.

Availability

ISL88011IH526Z-TK is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical handheld diagnostics, smart energy meters, ruggedized edge gateways, and battery-powered embedded controllers requiring stable component supply and long-term lifecycle assurance.

Supply support for ISL88011IH526Z-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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The ISL88011IH526Z-TK belongs to Renesas' legacy Intersil voltage supervisor product line, engineered specifically for high-accuracy, low-power power-on reset and brownout protection in space-constrained industrial and portable electronics.

FAQ

What is the exact voltage threshold and accuracy of the ISL88011IH526Z-TK?

The ISL88011IH526Z-TK has a factory-programmed VDD voltage threshold of 2.63 V with ±1.5% accuracy over the full −40 °C to +85 °C 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 = 2.59 V (min), 2.63 V (typ), 2.67 V (max) at 2.63 V nominal.

Does the ISL88011IH526Z-TK support watchdog timer or dual-voltage monitoring?

No, the ISL88011IH526Z-TK does not support watchdog timer or dual-voltage monitoring. As shown in the Product Features Table (Page 5), ISL88011 variants lack WDI and VMON pins. The ISL88011IH526Z-TK monitors only VDD using its fixed 2.63 V threshold and provides no adjustable monitoring input - those features belong exclusively to ISL88012/ISL88014/ISL88015 variants.

How is the power-on reset timeout adjusted on the ISL88011IH526Z-TK?

The ISL88011IH526Z-TK uses the CPOR pin (Pin 5) to adjust power-on reset timeout. Connecting an external capacitor between CPOR and GND extends tPOR beyond the nominal 200 ms - e.g., a 30 pF capacitor increases it to approximately 2.5 s, as documented in Figure 3 (Page 9) of FN8093 Rev 5.00. No resistor network is required; only the capacitor value determines the extended delay.

What are the reset output configurations supported by the ISL88011IH526Z-TK?

The ISL88011IH526Z-TK provides two independent reset outputs: Pin 3 (RST) is a push-pull active-high output that drives HIGH during reset, and Pin 1 (RST/MR) is an open-drain active-low output that pulls LOW during reset. Both outputs are asserted simultaneously and deasserted together after tPOR, enabling direct connection to MCUs with either reset polarity requirement.

Is the ISL88011IH526Z-TK RoHS-compliant and what is its package type?

Yes, the ISL88011IH526Z-TK is Pb-free and RoHS-compliant, packaged in a 5-lead SOT-23 (JEDEC MO-178AA / EIAJ SC-74) with P5.064 package drawing. This is explicitly stated in the Ordering Information table (Page 3) and Package Outline Drawing (Page 15) of FN8093 Rev 5.00, and confirmed by the "Pb-Free (RoHS Compliant)" feature bullet on Page 1.