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Renesas ISL88022IU8FAZ
- Part No.:
- ISL88022IU8FAZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88022IU8FAZ.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
ISL88022IU8FAZ from Intersil is a triple voltage monitor IC with adjustable power-on-reset, fixed VDD/V2MON undervoltage detection (3.09V/1.69V), and V3MON overvoltage monitoring capability referenced to 0.595V internal threshold. It provides both active-low open-drain RST and active-high push-pull RST outputs, operates from 2.0V to 5.5V supply, consumes only 15µA typical, and is housed in an 8-lead MSOP package for embedded system power supervision.
For engineers reviewing the ISL88022IU8FAZ datasheet, ISL88022IU8FAZ pinout, ISL88022IU8FAZ application, or ISL88022IU8FAZ equivalent, key selection considerations include its OV-capable V3MON input, 140–200ms POR timeout (adjustable via CPOR capacitor), dual reset outputs, ±6mV VTH3 accuracy over –40°C to +85°C, and compatibility with multi-rail systems requiring precise overvoltage fault response.
Technical Context
The ISL88022IU8FAZ implements a triple-monitor architecture where VDD and V2MON use factory-preset undervoltage thresholds (3.09V and 1.69V), while V3MON compares an external voltage-via resistor divider-to a 0.595V internal reference to detect overvoltage conditions. Reset assertion occurs when any monitored rail exceeds its trip point, and remains asserted for tPOR after all rails return to compliance.
Its POR circuit activates at VDD > 1V and holds RST low for a minimum 140ms delay, extendable up to ~10× using a capacitor on CPOR (max 50pF). The MR input features 20kΩ internal pull-up and 550ns minimum pulse width support, enabling robust manual reset integration without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VTH1) | 3.09V ±0.056V - Fixed UV trip for main supply; ensures microprocessor reset during brownout below nominal operating voltage. |
| V2MON Threshold (VTH2) | 1.69V ±0.030V - Fixed UV trip for secondary supply; supports monitoring of 1.8V or 2.5V rails with hysteresis for noise immunity. |
| V3MON Threshold (VTH3) | 0.595V ±0.008V - Internal reference for OV detection; enables precise overvoltage monitoring of any rail ≥0.6V via resistor divider. |
| POR Timeout (tPOR) | 140–200ms (CPOR open) - Minimum guaranteed reset hold time after power stabilization; configurable with external capacitor for longer delays. |
| Supply Current (IDD1) | 15µA typical at 5.0V - Ultra-low quiescent current preserves battery life in portable equipment and enables always-on supervision. |
| Reset Outputs | RST (open-drain, 0.4V max @ 2.5mA) and RST (push-pull, VDD−0.4V min) - Dual-output flexibility supports legacy microcontrollers requiring active-low reset and modern logic needing active-high assertion. |
| Operating Temp | –40°C to +85°C - Industrial-grade temperature range suitable for embedded control, instrumentation, and computer systems. |
Pinout & Package
Package: 8-lead MSOP (Mini Small Outline Plastic), 3.0mm × 3.0mm body, 0.65mm lead pitch, RoHS-compliant Pb-free plus anneal finish.
| 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; eliminates need for external RC network. |
| 2 VDD | Main power supply input | Supplies internal circuitry and enables POR; device functions down to VDD = 1V, with valid reset output even at low supply. |
| 3 V2MON | Fixed-threshold undervoltage monitor input | Monitors secondary supply against 1.69V trip; hysteresis of 17mV prevents chatter near threshold during slow transients. |
| 4 GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance connection to minimize noise coupling into sensitive comparators. |
| 5 V3MON | Overvoltage monitor input | Compares external voltage (via resistor divider) to 0.595V reference; detects overvoltage faults on rails >0.6V with ±0.008V accuracy. |
| 6 CPOR | Power-on-reset timeout adjustment | Capacitor-to-ground node that scales tPOR linearly; 0pF yields ~175ms, 50pF extends to ~1.7s; layout must minimize stray capacitance. |
| 7 RST | Active-low open-drain reset output | Drives low during fault or POR; requires external pull-up for logic-level compatibility; sinks 2.5mA max with <0.4V drop. |
| 8 RST | Active-high push-pull reset output | Drives high during normal operation; goes low during reset; eliminates need for external pull-up and simplifies FPGA/CPLD interface. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent voltage monitoring | Simultaneous supervision of VDD (UV), V2MON (UV), and V3MON (OV) enables full-system fault coverage without multiple discrete supervisors. |
| Adjustable POR timeout via CPOR | Capacitor-based timing allows precise matching of reset hold time to system startup requirements-including FPGA configuration, oscillator settling, and regulator ramp-up. |
| Dual reset outputs (RST/RST) | Supports mixed-logic environments: RST interfaces with legacy µCs requiring active-low reset, while RST drives modern peripherals directly. |
| 0.595V precision internal reference | Enables accurate overvoltage detection across wide input ranges (e.g., 3.3V OV at 3.6V); ±0.008V tolerance over temperature ensures reliable fault triggering. |
| Low 15µA supply current | Reduces standby power in battery-backed systems and avoids loading sensitive LDO outputs in low-power subsystems. |
Applications
| Industrial Process Controllers | Embedded Computer Systems |
|---|---|
|
Use Scenario: Monitoring 3.3V I/O rail, 1.8V core rail, and 5V auxiliary supply in PLC backplane modules subject to EMI-induced voltage spikes. IC Role / Device Role / Timing Role: Triple supervisor asserting RST during overvoltage on 3.3V rail (via V3MON) and undervoltage on 1.8V rail (via V2MON), with POR holding reset until all rails stabilize. Use Value: Prevents firmware corruption and latch-up by ensuring processor remains held in reset until all supplies meet OV/UV thresholds and settle for ≥140ms. |
Use Scenario: Power sequencing and fault detection in compact x86 or ARM-based industrial PCs with multiple regulated DC-DC outputs. IC Role / Device Role / Timing Role: VDD monitors main 5V rail, V2MON supervises 3.3V peripheral bus, V3MON detects overvoltage on 12V fan supply using 20:1 resistor divider. Use Value: Enables single-chip supervision of three critical rails with differentiated fault responses-UV on VDD/V2MON triggers immediate reset, OV on V3MON prevents thermal runaway. |
| Portable Medical Instruments | Battery-Powered Test Equipment |
|
Use Scenario: Supervising Li-ion battery output (3.6V nominal), regulated 3.3V MCU supply, and 1.2V ADC reference in handheld ultrasound devices. IC Role / Device Role / Timing Role: VDD tracks battery voltage for low-battery shutdown, V2MON guards 3.3V rail against dropout, V3MON watches for overvoltage during fast-charge termination. Use Value: Guarantees safe shutdown before battery under-voltage damages cells, while detecting charger-induced overvoltage before it damages analog front-end circuitry. |
Use Scenario: Multi-rail validation in handheld multimeters with isolated 9V alkaline supply, 3.3V logic, and 5V display backlight drivers. IC Role / Device Role / Timing Role: VDD monitors primary 9V rail, V2MON checks 3.3V logic rail, V3MON configured for OV detection on 5V backlight to prevent LED overcurrent. Use Value: Eliminates need for separate OV protection ICs; uses same 0.595V reference to scale thresholds precisely-e.g., 5V OV set at 5.3V with 6% margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+ | Single-supply UV monitor (2.93V fixed), no V2MON/V3MON; only one reset output (active-low open-drain); no POR adjustability. | Limited to single-rail supervision; lacks overvoltage detection and dual reset outputs required for complex multi-rail systems. | Select only if supervising one critical rail with fixed UV threshold and no need for OV response or flexible reset signaling. |
| TPS3808G33DBVR | Dual voltage monitor (VDD + VSENSE), adjustable UV threshold (0.4–5.5V), no OV mode; only one reset output (active-low open-drain); POR timeout fixed at 200ms. | Supports two rails but cannot monitor three; lacks V3MON OV capability and second reset output; no CPOR adjustment. | Choose when dual-rail UV supervision suffices and board space constraints preclude adding a third monitor or dual-output requirement. |
Compared with MAX6326US29D3+ and TPS3808G33DBVR, the ISL88022IU8FAZ uniquely delivers triple-rail monitoring with dedicated OV detection on V3MON, dual RST/RST outputs, and field-adjustable POR timing-making it the only option among the three capable of full-system fault coverage in compact industrial and portable designs.
Availability
ISL88022IU8FAZ is available at Aetrix Electronics and suitable for industrial process controllers, embedded computer systems, and portable medical instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL88022IU8FAZ 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, designs high-performance analog and power management ICs for industrial, computing, and communications markets.
The ISL88022IU8FAZ belongs to Intersil's voltage supervisor product line, engineered specifically for reliable multi-rail power monitoring in space-constrained embedded systems where overvoltage fault detection and flexible reset signaling are critical.
FAQ
What is the function of the V3MON pin on the ISL88022IU8FAZ?
The V3MON pin on the ISL88022IU8FAZ is configured for overvoltage (OV) monitoring. It compares an external voltage-scaled via a resistor divider-to a precise 0.595V internal reference. When the divided voltage exceeds this threshold, the device asserts reset. This differs from the ISL88021, which uses V3MON for undervoltage detection. The ISL88022IU8FAZ's OV capability makes it suitable for protecting against supply overvoltage events in multi-rail systems.
Does the ISL88022IU8FAZ support both undervoltage and overvoltage detection on the same input?
No, the ISL88022IU8FAZ does not support both UV and OV on the same input. VDD and V2MON are fixed undervoltage monitors (3.09V and 1.69V respectively), while V3MON is dedicated to overvoltage detection only. The device family splits functionality: ISL88021 uses V3MON for UV, ISL88022 for OV. The ISL88022IU8FAZ is specifically characterized and tested for OV response on V3MON, with threshold accuracy of ±0.008V over temperature.
How is the power-on-reset timeout adjusted on the ISL88022IU8FAZ?
The power-on-reset timeout on the ISL88022IU8FAZ is adjusted using an external capacitor connected between the CPOR pin and ground. With CPOR open, tPOR is 140–200ms; adding capacitance linearly increases the delay-e.g., 10pF extends it to ~390ms. The maximum recommended CPOR capacitance is 50pF. Layout must minimize stray capacitance, as parasitic effects directly impact timing accuracy. The ISL88022IU8FAZ datasheet provides a normalized graph correlating CPOR value to tPOR scaling.
What are the voltage thresholds and tolerances for VDD and V2MON on the ISL88022IU8FAZ?
The ISL88022IU8FAZ has a fixed VDD threshold (VTH1) of 3.09V with ±0.056V tolerance over –40°C to +85°C, and a fixed V2MON threshold (VTH2) of 1.69V with ±0.030V tolerance. These values are factory-trimmed and specified in the ordering table of the FN8226 datasheet. Hysteresis is 37mV for VTH1 and 17mV for VTH2, preventing oscillation during slow voltage transitions near trip points.
Can the ISL88022IU8FAZ operate with a supply voltage below 3.0V?
Yes, the ISL88022IU8FAZ operates from 2.0V to 5.5V. Its reset outputs remain valid down to VDD = 1V, and the POR circuit activates once VDD exceeds 1V. At 2.5V supply, RST output high voltage is guaranteed ≥1.9V (VDD−0.6V), and RST low voltage is ≤0.4V when sinking 1.5mA. This low-VDD capability supports supervision in battery-powered systems where supply voltage decays during discharge.
ISL88022IU8FAZ 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:
- 1.69V, 3.085V, 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
ISL88022IU8FAZ FAQ
1.How can I place an order for ISL88022IU8FAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88022IU8FAZ 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 ISL88022IU8FAZ reliable?
The price and inventory of ISL88022IU8FAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88022IU8FAZ is usually 5 days.
3.What payment methods are accepted for ISL88022IU8FAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88022IU8FAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88022IU8FAZ?
ISL88022IU8FAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88022IU8FAZ 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 ISL88022IU8FAZ?
For technical support, including ISL88022IU8FAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88022IU8FAZ requirements.
6.How does Aetrix verify that ISL88022IU8FAZ is sourced from the original manufacturer or authorized distributors?
All ISL88022IU8FAZ 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 ISL88022IU8FAZ meets industry standards.
7.What is the process for return or replacement of ISL88022IU8FAZ?
All ISL88022IU8FAZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL88022IU8FAZ, 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 ISL88022IU8FAZ part is unused and in its original packaging.
Return procedure for ISL88022IU8FAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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