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Renesas ISL88022IU8HEZ
- Part No.:
- ISL88022IU8HEZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88022IU8HEZ.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,971
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Product details
Overview
ISL88022IU8HEZ from Intersil is a triple voltage monitor IC with overvoltage detection on V3MON, fixed 4.64V VDD trip threshold, fixed 2.92V V2MON threshold, and 0.595V internal reference for adjustable OV monitoring via resistor divider - used in multi-rail embedded systems to prevent processor operation during supply overvoltage events.
For engineers reviewing the ISL88022IU8HEZ datasheet, ISL88022IU8HEZ pinout, ISL88022IU8HEZ application, or ISL88022IU8HEZ equivalent, this device supports precise 3.3V overvoltage supervision, manual reset debouncing, dual active-high/active-low reset outputs, and customizable POR delay up to 200ms with external capacitor on CPOR.
Technical Context
The ISL88022IU8HEZ implements independent voltage monitoring paths: VDD (4.64V ±74mV), V2MON (2.92V ±53mV), and V3MON configured for overvoltage detection referenced to 0.595V internal bandgap. All thresholds include hysteresis (46mV on VDD, 29mV on V2MON, 3mV on V3MON) to prevent chatter during threshold crossings.
It integrates a Power-On-Reset circuit asserting RST low until all monitored supplies stabilize for ≥140ms (adjustable via CPOR capacitor), plus an active-low open-drain MR input with 20kΩ internal pull-up and 550ns minimum pulse width requirement. Both RST (push-pull) and RST (open-drain) outputs are provided for flexible interface design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.64V ±74mV over -40°C to +85°C - ensures reliable reset assertion during 5V rail overvoltage or brownout |
| V2MON Threshold | 2.92V ±53mV - monitors secondary supply (e.g., 3.3V) with hysteresis to avoid false resets near trip point |
| V3MON Reference | 0.595V internal bandgap - enables precise overvoltage detection of any supply >0.6V using external resistor divider |
| POR Delay (CPOR open) | 140–200ms - holds RST low long enough for FPGA configuration and oscillator stabilization before system boot |
| Supply Current | 15µA typical at 5V - enables use in battery-powered equipment without significant quiescent load |
| Reset Output Drive | RST: push-pull high-drive (VDD−0.4V @ 2.5mA); RST: open-drain (0.4V max @ 2.5mA) - supports mixed-logic-level interfacing |
| Operating Temp | -40°C to +85°C - qualified for industrial embedded control and process automation environments |
Pinout & Package
ISL88022IU8HEZ is housed in an 8-lead MSOP package (3.0mm × 3.0mm × 1.0mm height), RoHS-compliant with Pb-free plus anneal finish, rated for JEDEC MO-187AA footprint and MSL3 reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-Low Manual Reset Input | Debounced input with 20kΩ internal pull-up; asserts reset when pulled below 0.8V for ≥550ns |
| 2 VDD | Power Supply Input | Primary supply rail (2.0–5.5V); powers internal comparators and generates POR signal when >1V |
| 3 V2MON | Fixed-Threshold Monitor Input | Monitors second supply (2.92V trip) for undervoltage; hysteresis prevents oscillation near threshold |
| 4 GND | Ground Reference | Analog and digital ground common node; must be low-impedance for accurate threshold referencing |
| 5 V3MON | Adjustable Overvoltage Monitor Input | Accepts resistor-divided voltage; compared to 0.595V reference to detect overvoltage conditions |
| 6 CPOR | POR Timeout Adjustment | Capacitor-to-ground sets POR delay; 0pF → 140–200ms; max 50pF recommended to limit timing error |
| 7 RST | Active-Low Open-Drain Reset Output | Drives low during reset; requires external pull-up; compatible with 1.8V–5V logic families |
| 8 RST | Active-High Push-Pull Reset Output | Asserts high during normal operation; sinks current during reset; no external components needed |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent voltage monitoring | Simultaneous supervision of VDD (4.64V), V2MON (2.92V), and V3MON (OV via 0.595V reference) prevents single-point failure in multi-rail systems |
| Dual reset outputs (RST/RST) | Enables direct connection to processors requiring active-high or active-low reset signals without level-shifting circuitry |
| Adjustable POR timeout via CPOR | External capacitor scales tPOR from 140ms to >200ms - accommodates slow-ramping supplies or FPGA configuration delays |
| Manual reset with internal pull-up | Eliminates need for external pull-up resistor; 550ns minimum MR pulse width ensures noise immunity in noisy industrial environments |
| Low 15µA quiescent current | Extends battery life in portable instrumentation and enables always-on supervision in energy-constrained edge devices |
Applications
| Industrial Process Controller | Embedded Medical Instrument |
|---|---|
|
Use Scenario: PLC I/O module with 5V, 3.3V, and 2.5V rails powering FPGA, ADC, and communication ICs. IC Role / Device Role / Timing Role: Triple supervisor detecting 5V overvoltage (via V3MON), 3.3V undervoltage (V2MON), and main 5V rail collapse (VDD) - asserts RST within 10µs to halt firmware execution. Use Value: Prevents corrupted FPGA configuration and data acquisition errors during transient overvoltage events on field-side power inputs. |
Use Scenario: Portable ECG monitor with lithium battery, buck-boost regulator, and analog front-end powered by three isolated rails. IC Role / Device Role / Timing Role: Monitors battery-derived 3.3V rail for overvoltage (V3MON), 1.8V analog supply for undervoltage (V2MON), and main 5V rail (VDD) - triggers RST if any rail exceeds safe operating window. Use Value: Ensures patient safety by halting signal processing before analog front-end saturation or ADC clipping occurs. |
| Network Router Control Board | Automated Test Equipment (ATE) |
|
Use Scenario: Multi-core SoC board with 12V/5V/3.3V/1.2V rails, where 3.3V rail feeds PHY and management MCU. IC Role / Device Role / Timing Role: Configured to detect 3.3V overvoltage (V3MON) caused by regulator fault, while VDD (5V) and V2MON (1.2V) supervise primary and core supplies - asserts both RST and RST simultaneously. Use Value: Enables fast, deterministic recovery from power subsystem faults without requiring software intervention or watchdog timeout. |
Use Scenario: High-precision ATE fixture with programmable voltage sources, DACs, and relays powered by tightly regulated 5V, 3.3V, and ±15V rails. IC Role / Device Role / Timing Role: Uses V3MON to monitor 3.3V rail for overvoltage (e.g., due to DAC output short), V2MON for 5V rail undervoltage, and VDD for main supply integrity - initiates hardware reset before relay driver latch-up. Use Value: Protects expensive DUT interfaces and prevents test result corruption caused by marginal supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US31D3+ | Single 3.08V reset threshold; no V2MON/V3MON flexibility; fixed POR only; no manual reset | Limited to single-rail supervision; lacks overvoltage capability and dual reset outputs | Select only for cost-sensitive single-supply designs where adjustable OV monitoring is unnecessary |
| TPS3808G33DBVR | Single 3.3V threshold; adjustable POR delay; manual reset; but only one monitor input and no V3MON OV mode | Cannot supervise three independent rails or detect overvoltage on auxiliary supplies | Choose when supervising only main 3.3V rail with POR customization, but not for multi-rail OV/UV coverage |
Compared with MAX6326US31D3+ and TPS3808G33DBVR, the ISL88022IU8HEZ uniquely provides simultaneous triple-rail monitoring with dedicated overvoltage detection on V3MON, dual reset outputs, and full POR adjustability - making it irreplaceable in systems requiring coordinated supervision of multiple critical supplies.
Availability
ISL88022IU8HEZ is available at Aetrix Electronics and suitable for industrial process controllers, embedded medical instruments, network infrastructure boards, portable test equipment, and multi-voltage FPGA carrier cards requiring stable component supply across extended temperature ranges.
Supply support for ISL88022IU8HEZ 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 U.S.-based analog and power management IC designer known for high-reliability supervisors, PMICs, and precision analog products serving industrial and embedded markets.
The ISL88022IU8HEZ belongs to Intersil's ISL8802x triple voltage monitor family, engineered specifically for robust, multi-rail power sequencing and fault detection in industrial control, instrumentation, and computing systems where supply integrity directly impacts functional safety.
FAQ
What is the VDD voltage threshold for ISL88022IU8HEZ?
The ISL88022IU8HEZ has a fixed VDD trip threshold of 4.64V, with ±74mV tolerance over -40°C to +85°C. This value is factory-trimmed and specified in the FN8226 datasheet Table "Voltage Thresholds" under part marking ANO. The hysteresis is 46mV, ensuring clean release after overvoltage recovery. This threshold is designed to supervise standard 5V rails while allowing margin for ripple and tolerance.
How does ISL88022IU8HEZ differ from ISL88021IU8HEZ?
The ISL88022IU8HEZ and ISL88021IU8HEZ share identical VDD (4.64V) and V2MON (2.92V) thresholds, but differ in V3MON functionality: ISL88022IU8HEZ configures V3MON for overvoltage detection, whereas ISL88021IU8HEZ uses it for undervoltage detection. Both compare the divided input to a ~0.6V internal reference, but polarity of fault detection is inverted between the two variants - confirmed in the Ordering Information table and Functional Description section of FN8226.
Can ISL88022IU8HEZ monitor a 3.3V supply for overvoltage?
Yes, ISL88022IU8HEZ can monitor a 3.3V supply for overvoltage using the V3MON pin. A resistor divider (e.g., 4.99kΩ + 1.00kΩ) scales 3.3V down to ~0.55V, which is compared to the 0.595V internal reference. When the scaled voltage exceeds 0.595V - indicating actual input >3.54V - the device asserts reset. This configuration is explicitly validated in Figure 5 and Application Considerations of FN8226.
What is the maximum capacitance allowed on the CPOR pin of ISL88022IU8HEZ?
The maximum recommended capacitance on the CPOR pin of ISL88022IU8HEZ is 50pF, as stated in the "Adjusting tPOR" section of FN8226. Exceeding this value increases timing uncertainty due to stray capacitance effects and may cause POR delay deviation beyond specification. With CPOR open, tPOR is 140–200ms; adding 10pF extends it to ~390ms per Figure 6, confirming nonlinear scaling behavior.
Does ISL88022IU8HEZ support manual reset, and what are its electrical requirements?
Yes, ISL88022IU8HEZ supports manual reset via the MR pin (Pin 1), an active-low open-drain input with 20kΩ internal pull-up. To assert reset, MR must be pulled below 0.8V for ≥550ns. The input is debounced internally, eliminating need for external RC filtering. This feature is verified in the Pin Descriptions and Electrical Specifications tables of FN8226, including VMRL (0.8V) and tMR (550ns) parameters.
ISL88022IU8HEZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.947V, 4.649V, Adj
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ISL88022IU8HEZ FAQ
1.How can I place an order for ISL88022IU8HEZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88022IU8HEZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL88022IU8HEZ reliable?
The price and inventory of ISL88022IU8HEZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88022IU8HEZ is usually 5 days.
3.What payment methods are accepted for ISL88022IU8HEZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88022IU8HEZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88022IU8HEZ?
ISL88022IU8HEZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88022IU8HEZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL88022IU8HEZ?
For technical support, including ISL88022IU8HEZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88022IU8HEZ requirements.
6.How does Aetrix verify that ISL88022IU8HEZ is sourced from the original manufacturer or authorized distributors?
All ISL88022IU8HEZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL88022IU8HEZ meets industry standards.
7.What is the process for return or replacement of ISL88022IU8HEZ?
All ISL88022IU8HEZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL88022IU8HEZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL88022IU8HEZ part is unused and in its original packaging.
Return procedure for ISL88022IU8HEZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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