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Renesas ISL88031IUHFZS2711
- Part No.:
- ISL88031IUHFZS2711
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88031IUHFZS2711.pdf
- Description:
- IC SUPERVISOR 5 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
ISL88031IUHFZS2711 from Renesas Electronics is a quintuple voltage-monitoring supervisor IC with fixed +4.634V and +3.078V thresholds on VDD and V2MON, adjustable monitoring for V3MON/V4MON/V5MON down to 0.6V, ±1.8% threshold accuracy, 120ms nominal reset pulse width, and 19µA max supply current at 5V - used in telecom routers and multi-rail server power sequencing.
For engineers reviewing the ISL88031IUHFZS2711 datasheet, ISL88031IUHFZS2711 pinout, ISL88031IUHFZS2711 application, or ISL88031IUHFZS2711 equivalent, key selection criteria include dual factory-preset thresholds, three adjustable monitor inputs with 0.6V reference, open-drain RST/MR interfaces, operation down to VDD = 1V, and MSOP-8 packaging for space-constrained industrial and datacom systems.
Technical Context
The ISL88031IUHFZS2711 integrates five independent voltage monitors: two factory-trimmed (VDD at 4.634V, V2MON at 3.078V) and three adjustable via external resistor dividers referenced to a stable 0.600V internal bandgap. All five channels feed into a common reset logic block with hysteresis (46mV on VTH1, 37mV on VTH2) and POR timeout of 120ms typical.
Its open-drain RST output asserts low when any monitored rail falls below its trip point and remains asserted until all rails recover and stabilize for tPOR; MR input provides debounced active-low manual reset with internal 10kΩ pull-up, supporting push-button or system-level reset signaling without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.634V ±1.8% over -40°C to +85°C - ensures reliable reset assertion during 5V rail brownout |
| V2MON Threshold | 3.078V ±1.8% over -40°C to +85°C - matches standard 3.3V supply tolerance for undervoltage detection |
| V3–V5 Reference | 0.600V ±2.2% over temperature - enables precise resistor-divider-based monitoring of >0.6V rails |
| Reset Pulse Width | 120ms nominal - guarantees sufficient hold time for microprocessor initialization and FPGA configuration |
| Supply Current | 19µA max at 5V - supports always-on supervision in low-power industrial and telecom standby modes |
| Operating Range | VDD = 2.0V to 5.5V - allows use across 2.5V, 3.3V, and 5V system domains without level-shifting |
| RST Output Drive | 0.4V max at 2.5mA sink - compatible with 3.3V/5V logic families and pull-up resistors ≥10kΩ |
Pinout & Package
Package: 8-lead MSOP (M8.118), RoHS-compliant, moisture sensitivity level (MSL) 1, footprint dimensions 3.0mm × 3.0mm × 1.1mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Debounced, internal 10kΩ pull-up; triggers full-system reset when pulled ≤0.8V for ≥550ns |
| 2 VDD | IC bias supply and primary monitor input | Supplies internal circuitry and simultaneously monitors own VDD rail against 4.634V threshold |
| 3 V2MON | Secondary preset voltage monitor input | Dedicated 3.078V threshold channel for independent 3.3V domain supervision |
| 4 GND | Analog/digital ground reference | Common return path for all internal comparators and reset logic; requires low-impedance PCB connection |
| 5 V3MON | Adjustable third voltage monitor input | Accepts resistor-divider network to set trip point >0.6V; referenced to internal 0.600V bandgap |
| 6 V4MON | Adjustable fourth voltage monitor input | Identical function to V3MON; enables concurrent monitoring of third independent rail (e.g., 1.8V core) |
| 7 V5MON | Adjustable fifth voltage monitor input | Enables full five-rail supervision including auxiliary or I/O supplies (e.g., 1.2V, 1.5V, 2.5V) |
| 8 RST | Active-low open-drain reset output | Asserts low if any monitored rail fails; requires external pull-up to host system's reset domain voltage |
Key Features
| Feature | Design Value |
|---|---|
| Quintuple independent monitoring | Simultaneous supervision of five distinct power rails - eliminates need for multiple discrete supervisors in multi-voltage systems |
| Dual factory-trimmed thresholds | 4.634V and 3.078V thresholds laser-trimmed at wafer test - removes calibration overhead for 5V/3.3V rails |
| Three adjustable monitor inputs | V3MON/V4MON/V5MON accept resistor dividers to set custom trip points >0.6V - supports legacy and emerging voltage domains |
| Immunity to supply transients | Hysteresis (46mV/37mV) and internal filtering prevent false resets during brief droops or noise spikes on monitored rails |
| Low-voltage operation | RST valid down to VDD = 1V - ensures fail-safe reset assertion even during deep brownout or battery-depleted conditions |
Applications
| Telecom Power Sequencing | Server Board Supervision |
|---|---|
|
Use Scenario: Monitoring 5V, 3.3V, 1.8V, 1.2V, and 1.0V rails in a line card power module with strict startup/shutdown ordering. IC Role / Device Role / Timing Role: Voltage supervisor providing synchronized reset assertion across all rails and enabling safe power sequencing via RST hold-off. Use Value: Prevents processor lockup during partial rail failure and ensures FPGA configuration completes before CPU release. |
Use Scenario: Real-time supervision of CPU core, memory, PCIe, management controller, and auxiliary rails in a 1U rack server motherboard. IC Role / Device Role / Timing Role: Centralized reset generator that asserts system-wide RST if any monitored rail deviates beyond ±5% tolerance. Use Value: Reduces BOM count by replacing five discrete supervisors while maintaining per-rail fault isolation via dedicated inputs. |
| Industrial PLC Controller | Network Access Concentrator |
|
Use Scenario: Continuous monitoring of 24V DC input, 5V logic, 3.3V I/O, 1.8V ADC, and 1.2V FPGA rails in an outdoor-rated programmable logic controller. IC Role / Device Role / Timing Role: Fault-tolerant supervisor with manual reset (MR) for field service recovery and brownout protection down to 1V VDD. Use Value: Enables deterministic restart after voltage sag without requiring external watchdog or microcontroller intervention. |
Use Scenario: Supervising upstream/downstream RF, PHY, MAC, management SoC, and PoE interface rails in a cable modem termination system. IC Role / Device Role / Timing Role: Quintuple monitor ensuring all subsystems power up in correct order and remain within spec during burst traffic load transients. Use Value: Eliminates intermittent boot failures caused by marginal 1.8V or 1.2V rail instability during high-throughput data sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US31D3+T | Triple monitor (3.08V/3.08V/3.08V), no adjustable inputs, 140ms reset timeout, 20µA ICC | Limited to identical triple-threshold use cases; cannot replace quintuple or mixed-threshold requirements | Select only when monitoring three identical rails with no need for customization or additional inputs |
| TPS3808G33DBVR | Single-channel 3.3V supervisor, 200ms reset delay, 1.6µA quiescent current, SOT-23-5 package | Requires four additional devices to match ISL88031IUHFZS2711's five-rail capability; increases board area and BOM complexity | Use only for single-rail cost-sensitive designs where multi-rail integration is unnecessary |
Compared with MAX6326US31D3+T and TPS3808G33DBVR, the ISL88031IUHFZS2711 uniquely delivers five independent monitoring channels - two factory-set and three user-adjustable - in a single MSOP-8 package, reducing PCB footprint by >75% versus discrete solutions while enabling flexible rail-specific supervision in telecom, server, and industrial platforms.
Availability
ISL88031IUHFZS2711 is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboards, and industrial PLC controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL88031IUHFZS2711 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 timing solutions for automotive, industrial, and infrastructure markets.
The ISL88031IUHFZS2711 belongs to Renesas' precision voltage supervisor product line, engineered for high-accuracy, low-power multi-rail monitoring in mission-critical telecom and datacom systems.
FAQ
What is the exact reset threshold voltage for VDD on the ISL88031IUHFZS2711?
The ISL88031IUHFZS2711 has a factory-trimmed VDD threshold of 4.634V with ±1.8% accuracy over –40°C to +85°C. This value is confirmed in the Electrical Specifications table on page 4 of FN8227 Rev 2.01, under VTH1 for IU8HFZ variants. The ISL88031IUHFZS2711 is part of the IU8HFZ ordering family, matching this specification exactly.
Does the ISL88031IUHFZS2711 support manual reset functionality, and how is it implemented?
Yes, the ISL88031IUHFZS2711 implements manual reset via Pin 1 (MR), an active-low, debounced input with an internal 10kΩ pull-up resistor. Pulling MR ≤0.8V for ≥550ns asserts RST low for the full POR timeout (120ms typical). This allows push-button or system-generated reset without external components - a verified feature documented in the Pin Descriptions and Principles of Operation sections of FN8227.
Can the ISL88031IUHFZS2711 monitor voltages lower than 3.3V or 5V, and if so, how?
Yes, the ISL88031IUHFZS2711 monitors voltages <3.3V/5V using its three adjustable inputs (V3MON, V4MON, V5MON), each referenced to a 0.600V internal threshold. By connecting external resistor dividers, users can set trip points for rails such as 1.8V, 1.2V, or 1.0V - confirmed in Equation 1 (page 6) and the VREF specification (0.589V to 0.611V) in FN8227 Rev 2.01.
What package type and footprint does the ISL88031IUHFZS2711 use, and is it RoHS-compliant?
The ISL88031IUHFZS2711 uses an 8-lead MSOP package (drawing M8.118), measuring 3.0mm × 3.0mm × 1.1mm max, with lead pitch of 0.65mm. It is Pb-free and RoHS-compliant, as stated in the Ordering Information table (page 2) and Package Outline Drawing (page 9) of FN8227 Rev 2.01.
How does the ISL88031IUHFZS2711 ensure immunity to power-supply transients during monitoring?
The ISL88031IUHFZS2711 achieves transient immunity through built-in hysteresis (46mV on VTH1, 37mV on VTH2) and internal filtering, explicitly cited in the Features list and Absolute Maximum Ratings section of FN8227 Rev 2.01. This prevents false resets during short-duration droops or switching noise - a design attribute validated across –40°C to +85°C operation.
ISL88031IUHFZS2711 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:
- 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
ISL88031IUHFZS2711 FAQ
1.How can I place an order for ISL88031IUHFZS2711 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88031IUHFZS2711 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 ISL88031IUHFZS2711 reliable?
The price and inventory of ISL88031IUHFZS2711 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88031IUHFZS2711 is usually 5 days.
3.What payment methods are accepted for ISL88031IUHFZS2711?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88031IUHFZS2711 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88031IUHFZS2711?
ISL88031IUHFZS2711 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88031IUHFZS2711 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 ISL88031IUHFZS2711?
For technical support, including ISL88031IUHFZS2711 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88031IUHFZS2711 requirements.
6.How does Aetrix verify that ISL88031IUHFZS2711 is sourced from the original manufacturer or authorized distributors?
All ISL88031IUHFZS2711 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 ISL88031IUHFZS2711 meets industry standards.
7.What is the process for return or replacement of ISL88031IUHFZS2711?
All ISL88031IUHFZS2711 units undergo pre-shipment inspection (PSI). If there is an issue with ISL88031IUHFZS2711, 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 ISL88031IUHFZS2711 part is unused and in its original packaging.
Return procedure for ISL88031IUHFZS2711:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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