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Renesas ISL88031IU8EAZ-TK
- Part No.:
- ISL88031IU8EAZ-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88031IU8EAZ-TK.pdf
- Description:
- IC SUPERVISOR 5 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,770
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Product details
Overview
ISL88031IU8EAZ-TK from Renesas Electronics is a quintuple voltage-monitoring supervisor IC with fixed VDD and V2MON thresholds of 2.866V and 1.683V, ±1.8% threshold accuracy, 120ms nominal reset pulse width, and 19µA max supply current at 5V - used to ensure reliable power-on reset and undervoltage supervision in multi-rail embedded systems.
For engineers reviewing the ISL88031IU8EAZ-TK datasheet, ISL88031IU8EAZ-TK pinout, ISL88031IU8EAZ-TK application, or ISL88031IU8EAZ-TK equivalent, key selection criteria include verified dual-fixed/three-adjustable voltage monitoring capability, open-drain RST/MR interfaces, operation down to VDD = 1V, and MSOP-8 packaging for space-constrained telecom and industrial control designs.
Technical Context
The ISL88031IU8EAZ-TK integrates five independent voltage monitors: two factory-preset (VDD and V2MON) and three adjustable via external resistor dividers (V3MON–V5MON), all referenced to a stable 0.600V internal bandgap. Its POR circuit asserts reset until VDD exceeds threshold and stabilizes for ≥120ms.
Reset assertion is synchronized across all five inputs - RST remains low until all monitored voltages exceed their trip points and remain stable for tPOR. The MR input features internal 10kΩ pull-up and 550ns minimum pulse width debouncing, enabling robust manual reset in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 2.866V ±1.8% over -40°C to +85°C - enables precise supervision of 2.85–2.88V rails without external calibration |
| V2MON Threshold | 1.683V ±1.8% over -40°C to +85°C - supports accurate monitoring of 1.65–1.72V logic or I/O supplies |
| V3/V4/V5 Trip Reference | 0.600V ±2.2% - allows adjustable monitoring of any voltage >0.6V using resistor dividers |
| Reset Pulse Width | 120ms nominal - ensures sufficient hold time for microprocessor initialization and FPGA configuration |
| Supply Current | 19µA max at 5V - minimizes system standby power impact in always-on monitoring applications |
| Operating Voltage Range | 2.0V to 5.5V - supports direct connection to 2.5V, 3.3V, and 5V bias rails without level shifting |
| Reset Output Type | Open-drain, valid down to VDD = 1V - permits flexible pull-up to higher voltage domains (e.g., 3.3V or 5V) |
Pinout & Package
ISL88031IU8EAZ-TK is housed in an 8-lead MSOP package (JEDEC MO-187-AA compliant, 3.0mm × 3.0mm footprint, 0.65mm pitch), optimized for high-density PCB layouts and reflow-compatible with Pb-free processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MR | Active-low manual reset input | Debounced, internally pulled up to VDD - accepts push-button or logic signal to force system reset |
| VDD | IC power supply and primary monitor input | Bias source and first monitored rail; trip at 2.866V ensures safe operation before MCU core activation |
| V2MON | Secondary fixed-threshold monitor input | Dedicated 1.683V detection for auxiliary rails like DDR termination or analog subsystems |
| GND | Analog/digital ground reference | Common return for all internal comparators and reset logic - requires low-impedance local decoupling |
| V3MON | Adjustable third monitor input | Accepts divided-down voltage; triggers reset when input falls below 0.600V reference |
| V4MON | Adjustable fourth monitor input | Independent of V3MON/V5MON - enables simultaneous tracking of three custom rails |
| V5MON | Adjustable fifth monitor input | Final adjustable channel; supports monitoring of low-voltage peripherals (e.g., 1.2V cores, 1.0V I/O) |
| RST | Active-low open-drain reset output | Drives external reset line; requires external pull-up - compatible with 1.8V–5V host logic |
Key Features
| Feature | Design Value |
|---|---|
| Quintuple monitoring architecture | Simultaneously supervises five independent rails - eliminates need for multiple discrete supervisors in multi-voltage systems |
| Dual factory-preset thresholds | VDD = 2.866V and V2MON = 1.683V - reduce BOM count and layout complexity for common supply combinations |
| Three adjustable monitor inputs | V3MON/V4MON/V5MON accept resistor-divided inputs >0.6V - enable full customization without trimming or calibration |
| Immunity to power-supply transients | Hysteresis (29–46mV) and internal filtering prevent false resets during brief droops or switching noise |
| Low-power operation | 19µA max ICC at 5V - extends battery life in portable equipment and reduces thermal load in sealed enclosures |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring +2.85V bias and +1.65V interface rails in optical line terminal (OLT) power sequencing. IC Role / Device Role / Timing Role: Quintuple supervisor ensuring synchronized POR and brownout protection across FPGA, PHY, and analog front-end. Use Value: Prevents partial initialization during cold-start by holding RST active until both fixed rails stabilize for ≥120ms. | Use Scenario: Supervising 2.8V fieldbus controller supply and 1.7V isolated sensor interface in DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Dual-fixed/three-adjustable monitor providing fail-safe reset during AC/DC converter ripple or ESD-induced droop. Use Value: 19µA quiescent current enables continuous monitoring without compromising energy budget in fanless designs. |
| Server Baseboard Management | Medical Imaging Power Sequencing |
Use Scenario: Validating 2.85V BMC core voltage and 1.68V PCIe slot reference in redundant server management controllers. IC Role / Device Role / Timing Role: Supervisor IC enforcing strict power-good timing between baseboard and add-in card rails per IPMI spec. Use Value: ±1.8% threshold accuracy guarantees compliance with JEDEC JESD8-12B tolerance requirements for critical control logic. | Use Scenario: Coordinating startup of 2.8V FPGA configuration rail and 1.65V ADC reference in portable ultrasound subsystems. IC Role / Device Role / Timing Role: Multi-rail sequencer replacement - eliminates discrete RC timers while maintaining deterministic reset release. Use Value: Open-drain RST output allows direct interfacing with 3.3V FPGA reset input, avoiding level-shifter components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D3+T | Single 2.93V reset IC in SOT23-3; no multi-rail capability | Only monitors one rail; lacks manual reset and adjustable inputs | Select only when supervising a single 2.9V supply with minimal board area |
| TPS3808G33DBVR | Single 3.3V supervisor with 200ms delay; adjustable version available but no quintuple function | Requires four additional devices to match ISL88031IU8EAZ-TK's five-rail coverage | Prefer for cost-sensitive single-rail designs where consolidation is not required |
Compared with MAX6326UT29D3+T and TPS3808G33DBVR, the ISL88031IU8EAZ-TK delivers integrated five-rail supervision in one MSOP-8 package - reducing component count, PCB area, and qualification effort for complex multi-voltage systems where coordinated reset timing is essential.
Availability
ISL88031IU8EAZ-TK is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL88031IU8EAZ-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 delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and datacenter applications.
The ISL88031 belongs to Renesas' precision voltage supervisor product line, engineered specifically for high-reliability multi-rail power sequencing in telecom, server, and industrial control systems.
FAQ
What are the exact fixed voltage thresholds for ISL88031IU8EAZ-TK?
The ISL88031IU8EAZ-TK has factory-programmed fixed thresholds of 2.866V for VDD (VTH1) and 1.683V for V2MON (VTH2), both specified with ±1.8% accuracy over -40°C to +85°C. These values are confirmed in the FN8227 Rev 2.01 datasheet Table on Page 4 under "Electrical Specifications" for ISL88031IU8ExZ and ISL88031IU8xAZ variants. No user adjustment is possible for these two inputs.
Can ISL88031IU8EAZ-TK monitor voltages below 1.683V?
Yes - while V2MON is fixed at 1.683V, the ISL88031IU8EAZ-TK supports monitoring of voltages as low as 0.6V on V3MON, V4MON, and V5MON using external resistor dividers. For example, a 1.2V rail can be scaled to 0.6V via a 1:1 divider, triggering reset if the rail drops below 1.2V. The internal 0.600V reference is accurate to ±2.2% across temperature.
Does ISL88031IU8EAZ-TK require external components for basic operation?
ISL88031IU8EAZ-TK operates autonomously with only VDD, GND, and pull-up on RST. An external pull-up resistor (typically 10kΩ to 3.3V or 5V) is mandatory for RST since it is open-drain. Manual reset (MR) uses an internal 10kΩ pull-up, so only a switch-to-ground is needed. No capacitors or resistors are required for the fixed VDD/V2MON channels.
What is the minimum VDD voltage at which ISL88031IU8EAZ-TK asserts reset?
The ISL88031IU8EAZ-TK asserts RST when VDD falls below its 2.866V threshold, but crucially, it also guarantees valid reset signaling down to VDD = 1V. This means RST remains functional and correctly asserted even during deep brownout conditions where VDD drops from 2.866V to 1V - a key reliability feature confirmed in the "Features" section on Page 1 of FN8227.
How does the manual reset (MR) function interact with automatic monitoring in ISL88031IU8EAZ-TK?
MR is fully asynchronous and overrides automatic monitoring: pulling MR low for ≥550ns forces immediate RST assertion regardless of VDD or other monitor states. After MR release, RST stays low for the full 120ms tPOR timeout - identical to power-on reset behavior. This ensures deterministic system-wide reset even during abnormal voltage conditions, as detailed in the "Manual Reset" section on Page 6 of FN8227.
ISL88031IU8EAZ-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:
- 1.683V, 2.866V, 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
ISL88031IU8EAZ-TK FAQ
1.How can I place an order for ISL88031IU8EAZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88031IU8EAZ-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 ISL88031IU8EAZ-TK reliable?
The price and inventory of ISL88031IU8EAZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88031IU8EAZ-TK is usually 5 days.
3.What payment methods are accepted for ISL88031IU8EAZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88031IU8EAZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88031IU8EAZ-TK?
ISL88031IU8EAZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88031IU8EAZ-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 ISL88031IU8EAZ-TK?
For technical support, including ISL88031IU8EAZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88031IU8EAZ-TK requirements.
6.How does Aetrix verify that ISL88031IU8EAZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL88031IU8EAZ-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 ISL88031IU8EAZ-TK meets industry standards.
7.What is the process for return or replacement of ISL88031IU8EAZ-TK?
All ISL88031IU8EAZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88031IU8EAZ-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 ISL88031IU8EAZ-TK part is unused and in its original packaging.
Return procedure for ISL88031IU8EAZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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