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Renesas ISL88031IU8HAZ
- Part No.:
- ISL88031IU8HAZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88031IU8HAZ.pdf
- Description:
- IC SUPERVISOR 5 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,337
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Product details
Overview
ISL88031IU8HAZ from Renesas Electronics is a quintuple voltage-monitoring supervisor IC with fixed VDD trip point of 4.634V and fixed V2MON threshold of 1.683V, ±1.8% accuracy, 120ms reset pulse width, and operation down to VDD = 1V. It monitors five supply rails-including two factory-preset and three adjustable inputs-in an 8-lead MSOP package for multi-rail microprocessor systems requiring reliable power-on reset and undervoltage supervision.
For engineers reviewing the ISL88031IU8HAZ datasheet, ISL88031IU8HAZ pinout, ISL88031IU8HAZ application, or ISL88031IU8HAZ equivalent, key selection criteria include its dual fixed thresholds (4.634V/1.683V), 19µA max supply current at 5V, open-drain RST/MR interfaces, hysteresis-enabled noise immunity, and compatibility with resistor-divider-based adjustment of V3MON–V5MON for custom voltage monitoring.
Technical Context
The ISL88031IU8HAZ implements a precision bandgap reference (0.600V ±2.2%) shared across three adjustable monitor inputs (V3MON–V5MON), while VDD and V2MON use independent trimmed internal references. Its POR circuit asserts RST low until VDD exceeds 4.634V and remains stable for 120ms, ensuring microprocessor initialization only after full rail stabilization.
All five monitoring channels feed into a wired-OR logic structure that holds RST active-low if any input falls below its threshold-whether VDD < 4.634V, V2MON < 1.683V, or any adjustable input < 0.600V-and maintains assertion until all voltages recover and tPOR elapses. The MR input includes internal 10kΩ pull-up and 550ns debouncing, enabling push-button or logic-level manual reset initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.634V ±1.8% over -40°C to +85°C - sets primary supply supervision level for +5V rail monitoring |
| V2MON Threshold | 1.683V ±1.8% over -40°C to +85°C - factory-preset for +1.8V system rail detection |
| V3/V4/V5 Reference | 0.600V ±2.2% - enables adjustable monitoring of supplies >0.6V via external resistor dividers |
| Reset Pulse Width | 120ms nominal - ensures sufficient hold time for microprocessor and FPGA configuration stability |
| Supply Current | 19µA max at 5V - supports ultra-low-power always-on supervision in battery-backed or standby systems |
| Reset Output | Open-drain, valid down to VDD = 1V - allows interfacing with diverse logic families and voltage domains |
| Manual Reset | Active-low, 550ns minimum pulse, internal 10kΩ pull-up - simplifies push-button integration without external components |
Pinout & Package
ISL88031IU8HAZ is housed in an 8-lead MSOP package (JEDEC MO-187-AA compliant, M8.118 drawing), measuring 3.0mm × 3.0mm × 1.1mm, with exposed pad optional per design. The package supports Pb-free reflow (IPC/JEDEC J-STD-020) and has θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Debounced, internally pulled up to VDD; initiates reset when pulled ≤0.8V for ≥550ns |
| 2 VDD | IC bias supply and primary monitor input | Supplies device and triggers reset if voltage drops below 4.634V (±1.8%) |
| 3 V2MON | Secondary fixed-threshold monitor input | Dedicated input for +1.8V rail supervision at 1.683V trip point |
| 4 GND | Analog/digital ground reference | Common return path for all internal comparators and reference circuitry |
| 5 V3MON | Adjustable third monitor input | Accepts divided-down voltage; resets if input falls below 0.600V reference |
| 6 V4MON | Adjustable fourth monitor input | Same reference and behavior as V3MON; supports independent rail monitoring |
| 7 V5MON | Adjustable fifth monitor input | Third adjustable channel; enables full five-rail supervision with minimal external parts |
| 8 RST | Active-low open-drain reset output | Asserted low during POR, undervoltage, or MR event; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Quintuple monitoring architecture | Simultaneously supervises five independent supply rails-two fixed, three adjustable-reducing BOM count vs. discrete supervisors |
| Factory-trimmed dual thresholds | VDD = 4.634V and V2MON = 1.683V are laser-trimmed for ±1.8% accuracy across temperature, eliminating calibration overhead |
| Resistor-divider programmability | V3MON–V5MON accept external dividers to monitor any rail >0.6V (e.g., 1.2V, 2.5V, 3.3V) without changing IC variant |
| Noise-immune reset logic | Hysteresis on VTH1 (46mV) and VTH2 (17mV) prevents chatter during supply transients; immune to brief droops |
| Low-voltage operational margin | RST remains functional down to VDD = 1V, enabling supervision during brownout recovery and backup battery transitions |
Applications
| Telecom Power Systems | Industrial PLC Controllers |
|---|---|
Use Scenario: Monitoring +5V, +3.3V, +2.5V, +1.8V, and +1.2V rails in carrier-grade line cards with hot-swap capability. IC Role / Device Role / Timing Role: Voltage supervisor providing coordinated POR, undervoltage lockout, and manual reset for FPGA, DSP, and SERDES subsystems. Use Value: Prevents partial initialization during power sequencing faults; 120ms tPOR aligns with FPGA configuration timing requirements. |
Use Scenario: Supervising isolated I/O module supplies (+24V DC-DC derived +5V, +3.3V, +1.8V, +1.2V, and analog sensor bias). IC Role / Device Role / Timing Role: Centralized fault detection unit triggering system-wide reset upon any rail deviation beyond ±5% tolerance. Use Value: Eliminates need for five discrete supervisors; 19µA quiescent current extends battery backup runtime during AC loss. |
| Server Motherboard Management | Medical Imaging Subsystems |
Use Scenario: Validating core, memory, I/O, auxiliary, and management controller rails on x86 server motherboards with multi-phase VRMs. IC Role / Device Role / Timing Role: System health monitor interfacing with BMC via open-drain RST to signal power integrity failure. Use Value: Dual fixed thresholds (4.634V/1.683V) match standard +5V and +1.8V CPU I/O rails; adjustable inputs cover DDR4 VDDQ and PCH rails. |
Use Scenario: Ensuring clean startup of FPGA-based image processing pipelines in portable ultrasound units powered by Li-ion batteries. IC Role / Device Role / Timing Role: Supervisor guaranteeing all digital, analog, and RF subsystems reach stable voltage before acquisition begins. Use Value: RST validity down to VDD = 1V supports graceful shutdown during battery depletion; ±1.8% accuracy meets IEC 62304 Class C timing safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT46D3+ | Single 4.63V supervisor in SOT23-3; no multi-rail capability, no adjustable inputs, no manual reset | Suitable only for basic +5V rail monitoring; cannot replace quintuple function of ISL88031IU8HAZ | Select only when supervising one rail and board space is constrained to <1mm² |
| TPS3808G33DBVR | Single 3.3V supervisor with adjustable delay; lacks multiple inputs, fixed 1.683V channel, and V3–V5 adjustability | Requires four additional supervisors to match ISL88031IU8HAZ's five-rail coverage; higher total solution cost and area | Consider only if existing design already uses TPS3808 family and only +3.3V supervision is needed |
Compared with MAX6326UT46D3+ and TPS3808G33DBVR, the ISL88031IU8HAZ delivers integrated five-rail supervision in one 8-pin MSOP, reducing PCB area by >70% and eliminating inter-supervisor timing skew-critical for synchronized reset in multi-domain systems.
Availability
ISL88031IU8HAZ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control systems, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL88031IU8HAZ 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 microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.
The ISL88031IU8HAZ belongs to Renesas' high-accuracy voltage supervisor product line, designed specifically for complex multi-rail systems where simultaneous monitoring of fixed and configurable supplies improves reliability and reduces design complexity.
FAQ
What is the exact reset threshold voltage for VDD on the ISL88031IU8HAZ?
The ISL88031IU8HAZ has a factory-trimmed VDD threshold of 4.634V with ±1.8% accuracy over the full -40°C to +85°C operating range. This value is laser-calibrated during production and specified in the Electrical Specifications table on page 4 of the FN8227 datasheet. The ISL88031IU8HAZ uses this precise trip point to supervise +5V system rails without external resistor networks.
How does the ISL88031IU8HAZ handle manual reset functionality?
The ISL88031IU8HAZ provides manual reset via Pin 1 (MR), an active-low, debounced input with an internal 10kΩ pull-up resistor. Pulling MR to ≤0.8V for ≥550ns initiates a reset cycle; RST then remains low for the full 120ms tPOR period regardless of MR release timing. This eliminates external RC debounce components and ensures deterministic reset behavior in the ISL88031IU8HAZ.
Can the ISL88031IU8HAZ monitor a +2.5V supply rail?
Yes-the ISL88031IU8HAZ can monitor a +2.5V rail using one of its three adjustable inputs (V3MON, V4MON, or V5MON). By connecting a resistor divider between the +2.5V rail and GND such that the divided voltage equals 0.600V at the input pin, the ISL88031IU8HAZ will assert reset if the rail drops below 2.5V × (R2/(R1+R2)) = 0.600V. The ISL88031IU8HAZ datasheet provides Equation 1 for calculating exact resistor values.
What is the maximum supply current consumption of the ISL88031IU8HAZ?
The ISL88031IU8HAZ draws a maximum supply current of 19µA at VDD = 5.0V and +25°C, as specified in the Electrical Specifications table (IDD1 parameter). This ultra-low quiescent current enables continuous supervision in battery-backed systems and low-power standby modes without compromising monitoring fidelity or response time.
Does the ISL88031IU8HAZ support operation below 2.0V on VDD?
No-the ISL88031IU8HAZ has a specified minimum VDD supply voltage of 2.0V per the Recommended Operating Conditions table. While the RST output remains valid down to VDD = 1V, the device itself requires ≥2.0V to power internal comparators, reference circuits, and logic. Operation below 2.0V may result in undefined behavior or failure to assert reset correctly in the ISL88031IU8HAZ.
ISL88031IU8HAZ 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:
- 5
- Voltage - Threshold:
- 1.683V, 4.634V, Adj, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 80ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ISL88031IU8HAZ FAQ
1.How can I place an order for ISL88031IU8HAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88031IU8HAZ 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 ISL88031IU8HAZ reliable?
The price and inventory of ISL88031IU8HAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88031IU8HAZ is usually 5 days.
3.What payment methods are accepted for ISL88031IU8HAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88031IU8HAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88031IU8HAZ?
ISL88031IU8HAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88031IU8HAZ 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 ISL88031IU8HAZ?
For technical support, including ISL88031IU8HAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88031IU8HAZ requirements.
6.How does Aetrix verify that ISL88031IU8HAZ is sourced from the original manufacturer or authorized distributors?
All ISL88031IU8HAZ 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 ISL88031IU8HAZ meets industry standards.
7.What is the process for return or replacement of ISL88031IU8HAZ?
All ISL88031IU8HAZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL88031IU8HAZ, 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 ISL88031IU8HAZ part is unused and in its original packaging.
Return procedure for ISL88031IU8HAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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