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Renesas ISL88031IU8HFZ-TK
- Part No.:
- ISL88031IU8HFZ-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88031IU8HFZ-TK.pdf
- Description:
- IC SUPERVISOR 5 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,989
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Product details
Overview
ISL88031IU8HFZ-TK from Renesas Electronics is a quintuple voltage-monitoring supervisor IC with fixed VDD and V2MON thresholds of 4.634V and 3.078V, ±1.8% threshold accuracy, 120ms nominal reset pulse width, and 19µA max supply current at 5V. It monitors five voltages-including two factory-preset supplies and three adjustable inputs-for power-on reset, undervoltage supervision, and manual reset in multi-rail embedded systems.
For engineers reviewing the ISL88031IU8HFZ-TK datasheet, ISL88031IU8HFZ-TK pinout, ISL88031IU8HFZ-TK application, or ISL88031IU8HFZ-TK equivalent, key selection criteria include verified VTH1/VTH2 trip points, open-drain RST/MR interface compatibility, MSOP-8 package constraints, and support for <1V reset validity during brownout recovery.
Technical Context
The ISL88031IU8HFZ-TK implements five independent voltage comparators against internal references: one fixed 4.634V threshold on VDD, one fixed 3.078V threshold on V2MON, and three adjustable inputs (V3MON–V5MON) referenced to a stable 0.600V internal VREF. All five channels feed into a wired-OR logic block that asserts an active-low open-drain RST output when any monitored voltage falls below its trip point.
Reset assertion includes built-in hysteresis (46mV on VTH1, 37mV on VTH2), 120ms POR timeout, and immunity to sub-6µs supply transients. Manual reset via MR pin is debounced and supports push-button integration with internal 10kΩ pull-up, enabling system-level fault recovery without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VTH1) | 4.634V ±1.8% over -40°C to +85°C - ensures reliable reset initiation for 5V rail monitoring with minimal false triggering |
| V2MON Threshold (VTH2) | 3.078V ±1.8% over -40°C to +85°C - provides precise supervision of 3.3V supply with guaranteed hysteresis |
| V3/V4/V5MON Reference | 0.600V ±2.2% over temperature - enables resistor-divider-based monitoring of any voltage >0.6V (e.g., 1.8V, 2.5V, 3.3V) |
| Reset Pulse Width | 120ms nominal - guarantees sufficient hold time for microprocessor initialization and FPGA configuration loading |
| Supply Current (IDD1) | 19µA max at 5V - minimizes quiescent load on battery-backed or low-power auxiliary rails |
| RST Output Type | Active-low open-drain - allows wired-OR connection with other reset sources and flexible pull-up voltage selection |
| MR Input Logic | Active-low with 10kΩ internal pull-up - eliminates need for external biasing in manual reset button circuits |
Pinout & Package
ISL88031IU8HFZ-TK is housed in an 8-lead MSOP package (JEDEC MO-187-AA compliant, M8.118 drawing), measuring 3.0mm × 3.0mm × 1.1mm with 0.65mm pitch. The package is RoHS-compliant, Pb-free, and rated for industrial temperature range (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Manual Reset Input | Active-low debounced input with internal 10kΩ pull-up; triggers full-system reset when pulled below 0.8V for ≥550ns |
| 2 - VDD | Power Supply & Monitor Input | Bias source and primary monitor; compared against 4.634V fixed threshold; RST asserts if VDD drops below this level |
| 3 - V2MON | Secondary Fixed-Voltage Monitor | Monitors second supply (e.g., 3.3V) against 3.078V threshold; contributes to RST assertion if violated |
| 4 - GND | Ground Reference | Analog and digital ground return for all internal comparators and reference circuitry |
| 5 - V3MON | Adjustable Voltage Monitor | Third monitor input referenced to 0.600V internal VREF; trip point set by external resistor divider |
| 6 - V4MON | Adjustable Voltage Monitor | Fourth monitor input with identical 0.600V reference; supports independent rail supervision |
| 7 - V5MON | Adjustable Voltage Monitor | Fifth monitor input; enables full five-rail coverage including sub-1.8V domains like 1.2V or 0.9V |
| 8 - RST | Reset Output | Open-drain output asserted low during any fault condition; remains low until all five inputs stabilize above thresholds for 120ms |
Key Features
| Feature | Design Value |
|---|---|
| Quintuple Monitoring Architecture | Simultaneous supervision of five independent power rails-two fixed, three adjustable-reducing BOM count vs. discrete supervisors |
| ±1.8% Threshold Accuracy | Guaranteed over full industrial temperature range, minimizing design margin and enabling tighter supply tolerance budgets |
| 120ms Programmable POR Delay | Ensures microcontroller core, PLLs, and memory subsystems fully stabilize before release from reset |
| Sub-1V Reset Validity | RST remains functional down to VDD = 1V, supporting brownout detection and graceful shutdown in deep undervoltage events |
| Transient Immunity | Immune to power-supply transients <6µs, preventing spurious resets from switching noise or load dumps |
Applications
| Telecom Power Sequencing | Server Board Supervision |
|---|---|
Use Scenario: Monitoring +5V, +3.3V, +1.8V, +1.2V, and +0.9V rails on a line card with hot-swap controllers and FPGAs. IC Role / Device Role / Timing Role: Quintuple supervisor providing coordinated POR, undervoltage lockout, and manual reset for sequential power-up and fault containment. Use Value: Eliminates need for five discrete reset ICs; reduces PCB area by 65% and improves timing correlation between rail monitors. | Use Scenario: Ensuring stable boot sequence across CPU core, memory, PCIe, BMC, and auxiliary rails in dual-socket server motherboards. IC Role / Device Role / Timing Role: Centralized voltage watchdog enforcing minimum valid operating windows for each rail before releasing processor reset. Use Value: Prevents firmware corruption during partial power loss; enables deterministic recovery via MR-triggered reinitialization. |
| Industrial PLC I/O Module | Notebook Platform Power Management |
Use Scenario: Supervising isolated 24V DC-DC outputs, 5V logic, 3.3V MCU, 1.8V FPGA I/O, and 1.2V core in harsh EMI environments. IC Role / Device Role / Timing Role: Fault-tolerant supervisor with hysteresis and transient immunity, interfacing to PLC watchdog timer and safety controller. Use Value: Maintains system integrity during voltage sags caused by motor switching; supports fail-safe shutdown via RST-driven isolation relays. | Use Scenario: Coordinating power-good sequencing for CPU, GPU, DDR4, SSD, and EC rails in ultra-thin notebook designs with tight thermal budgets. IC Role / Device Role / Timing Role: Low-quiescent-current (19µA) supervisor enabling always-on monitoring without compromising battery life in S0ix states. Use Value: Extends battery runtime in standby mode while guaranteeing rapid, glitch-free wake-up from deep sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US46D3+T | Quad monitor (not quintuple); fixed 4.63V VCC threshold only; no adjustable inputs; 14µA typical ICC | Lacks V2MON, V3MON–V5MON capability; suitable only for single-rail + POR use cases | Select when only basic 5V rail supervision is required and board space permits separate ICs for additional rails |
| TPS3808G33DBVR | Single-channel supervisor; 3.3V fixed threshold; 100ms reset delay; 16µA ICC; no manual reset input | No multi-rail capability or MR function; requires external logic for multi-input OR-ing | Choose for cost-sensitive, single-supply applications where quintuple integration is unnecessary |
Compared with MAX6326US46D3+T and TPS3808G33DBVR, the ISL88031IU8HFZ-TK delivers integrated five-rail supervision with adjustable thresholds, manual reset, and sub-1V reset validity-enabling smaller footprint, lower component count, and higher system reliability in complex multi-voltage platforms.
Availability
ISL88031IU8HFZ-TK is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard design, industrial PLC development, and notebook platform validation requiring stable component supply and long-term lifecycle support.
Supply support for ISL88031IU8HFZ-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 is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and data infrastructure markets.
The ISL88031 belongs to Renesas' precision voltage supervisor product line, engineered for high-accuracy, low-power multi-rail monitoring in mission-critical embedded systems where reliability and timing determinism are essential.
FAQ
What is the exact VTH1 and VTH2 threshold voltage for ISL88031IU8HFZ-TK?
The ISL88031IU8HFZ-TK has a factory-programmed VDD threshold (VTH1) of 4.634V and a V2MON threshold (VTH2) of 3.078V, both specified with ±1.8% accuracy over the full -40°C to +85°C industrial temperature range. These values are confirmed in the Ordering Information table on page 2 of FN8227 Rev 2.01 and validated across temperature in the Electrical Specifications section.
Does ISL88031IU8HFZ-TK support manual reset functionality?
Yes, ISL88031IU8HFZ-TK includes a dedicated MR pin (Pin 1) that accepts an active-low signal to trigger system reset. It features internal 10kΩ pull-up, 550ns minimum pulse width requirement, and debounced logic. When MR is pulled below 0.8V, ISL88031IU8HFZ-TK asserts RST low for the full 120ms POR timeout, ensuring deterministic recovery.
Can ISL88031IU8HFZ-TK monitor voltages below 1.8V?
Yes, ISL88031IU8HFZ-TK can monitor voltages as low as 0.6V using its V3MON, V4MON, and V5MON inputs. Each is referenced to an internal 0.600V ±2.2% bandgap voltage, allowing resistor-divider configurations to supervise rails such as 1.2V, 0.9V, or 0.8V. The datasheet confirms operation down to VDD = 1V, and RST remains valid throughout.
What package type and dimensions does ISL88031IU8HFZ-TK use?
ISL88031IU8HFZ-TK uses an 8-lead MSOP package per JEDEC MO-187-AA, designated M8.118. Its dimensions are 3.0mm × 3.0mm × 1.1mm with 0.65mm lead pitch. The package is RoHS-compliant, Pb-free, and qualified for industrial temperature operation (-40°C to +85°C), as documented in the Package Outline Drawing on page 9 of FN8227.
How does ISL88031IU8HFZ-TK handle power supply transients?
ISL88031IU8HFZ-TK is explicitly designed to be immune to brief power-supply transients under 6µs, as stated in the Features list and validated by tRPD = 7.5µs in Figure 6. This immunity prevents false resets during switching noise, load dumps, or fast-rising edge events-critical for robust operation in noisy telecom and industrial environments.
ISL88031IU8HFZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 5
- Voltage - Threshold:
- 3.078V, 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
ISL88031IU8HFZ-TK FAQ
1.How can I place an order for ISL88031IU8HFZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88031IU8HFZ-TK 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 ISL88031IU8HFZ-TK reliable?
The price and inventory of ISL88031IU8HFZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88031IU8HFZ-TK is usually 5 days.
3.What payment methods are accepted for ISL88031IU8HFZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88031IU8HFZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88031IU8HFZ-TK?
ISL88031IU8HFZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88031IU8HFZ-TK 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 ISL88031IU8HFZ-TK?
For technical support, including ISL88031IU8HFZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88031IU8HFZ-TK requirements.
6.How does Aetrix verify that ISL88031IU8HFZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL88031IU8HFZ-TK 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 ISL88031IU8HFZ-TK meets industry standards.
7.What is the process for return or replacement of ISL88031IU8HFZ-TK?
All ISL88031IU8HFZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88031IU8HFZ-TK, 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 ISL88031IU8HFZ-TK part is unused and in its original packaging.
Return procedure for ISL88031IU8HFZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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