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Renesas ISL88031IU8ECZ-TK
- Part No.:
- ISL88031IU8ECZ-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88031IU8ECZ-TK.pdf
- Description:
- IC SUPERVISOR 5 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,252
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Product details
Overview
ISL88031IU8ECZ-TK from Renesas Electronics is a quintuple voltage-monitoring supervisor IC with fixed VDD and V2MON thresholds of 2.866V and 2.333V, ±1.8% threshold accuracy, 120ms nominal reset pulse width, and 19µA max supply current at 5V. It monitors five power rails in telecom, server, and industrial multi-voltage systems to ensure safe microprocessor startup and brownout protection.
For engineers reviewing the ISL88031IU8ECZ-TK datasheet, ISL88031IU8ECZ-TK pinout, ISL88031IU8ECZ-TK application, or ISL88031IU8ECZ-TK equivalent, key selection criteria include dual fixed-threshold monitoring, three adjustable inputs (≥0.6V), manual reset capability, open-drain RST output valid down to VDD = 1V, and operation across –40°C to +85°C.
Technical Context
The ISL88031IU8ECZ-TK integrates a precision bandgap reference (0.600V ±2%) for adjustable V3MON/V4MON/V5MON inputs, factory-programmed trip points for VDD and V2MON, and hysteresis (29mV on VTH1, 23mV on VTH2) to prevent noise-induced chatter. Its POR circuit asserts reset until VDD exceeds threshold for ≥120ms, ensuring stable power-up sequencing.
Reset assertion occurs when any monitored voltage falls below its trip point - including VDD < 2.866V, V2MON < 2.333V, or any adjustable input < 0.600V - and remains active until all voltages recover and stabilize for tPOR. The MR input features internal 10kΩ pull-up and 550ns minimum pulse width debouncing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 2.866V ±1.8% at +25°C; ensures reliable reset during 2.8–3.0V rail brownout |
| V2MON Threshold | 2.333V ±1.8% at +25°C; supports monitoring of 2.3–2.4V auxiliary supplies |
| V3/V4/V5 Threshold | 0.600V ±2% reference; enables adjustable monitoring of >0.6V rails via resistor dividers |
| Reset Pulse Width | 120ms nominal; guarantees sufficient hold time for FPGA configuration and CPU initialization |
| Supply Current | 19µA max at 5V; enables always-on supervision in low-power industrial systems |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded and telecom equipment |
| Reset Output | Open-drain RST, VOL ≤0.4V @ 2.5mA; compatible with 1.8V–5V logic interfaces |
Pinout & Package
ISL88031IU8ECZ-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 exposed pad not connected internally. Pin 1 marked by notch or dot; lead pitch 0.65mm; RoHS-compliant matte tin (e3) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MR (Pin 1) | Active-low manual reset input | Debounced, internal 10kΩ pull-up; triggers reset when pulled ≤0.8V for ≥550ns |
| VDD (Pin 2) | IC bias supply & primary monitor input | Supplies device and monitored at 2.866V; reset asserted if VDD < threshold |
| V2MON (Pin 3) | Secondary fixed-threshold monitor input | Monitored at 2.333V; independent of VDD; resets system if violated |
| GND (Pin 4) | Reference ground | Common return for all analog references and digital logic; requires low-impedance connection |
| V3MON (Pin 5) | Adjustable third monitor input | Threshold set by external resistor divider; trips when voltage at pin < 0.600V |
| V4MON (Pin 6) | Adjustable fourth monitor input | Same reference and trip logic as V3MON; enables independent monitoring of fourth rail |
| V5MON (Pin 7) | Adjustable fifth monitor input | Same reference and trip logic as V3MON; completes quintuple monitoring capability |
| RST (Pin 8) | Active-low open-drain reset output | Pulled low during reset; requires external pull-up; valid down to VDD = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Quintuple monitoring architecture | Simultaneously supervises five distinct power rails - two factory-fixed, three user-adjustable - reducing BOM count vs. discrete supervisors |
| ±1.8% threshold accuracy | Minimizes false resets and improves margin for critical 2.8V/2.3V rails in telecom infrastructure |
| 120ms POR timeout | Guarantees reset hold long enough for FPGA bitstream loading and CPU register initialization |
| 19µA max IDD at 5V | Enables permanent supervision in battery-backed or energy-constrained industrial controllers |
| Immunity to supply transients | Hysteresis and internal filtering suppress brief droops (<6µs), preventing spurious resets in noisy switch-mode environments |
Applications
| Telecom Power Sequencing | Server Board Supervision |
|---|---|
Use Scenario: Monitoring multiple DC/DC outputs (e.g., 2.8V core, 2.3V I/O, 1.8V memory, 1.2V GPU, 3.3V management) on a 48V telecom line card. IC Role / Device Role / Timing Role: Quintuple supervisor enforcing power-up order and detecting undervoltage faults before ASIC activation. Use Value: Prevents latch-up and data corruption by holding reset until all five rails exceed their precise thresholds and stabilize for 120ms. | Use Scenario: Ensuring clean boot of dual-socket x86 servers with complex rail dependencies (VCCIO, VDDQ, VPP, AVCC, PCH_STBY). IC Role / Device Role / Timing Role: Centralized voltage guard monitoring primary and auxiliary rails; coordinating reset with BMC via MR input. Use Value: Eliminates need for five discrete supervisors, saving 22mm² PCB area and simplifying layout while maintaining ±1.8% trip accuracy. |
| Industrial PLC Controller | Multi-Rail Embedded System |
Use Scenario: Supervising isolated 24V-to-5V, 3.3V, 2.5V, 1.8V, and 1.2V rails in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Fault-detection engine asserting hardware reset on any rail collapse, with manual reset for field service recovery. Use Value: Enables fail-safe shutdown during brownouts; MR input allows maintenance-triggered cold reboot without power cycle. | Use Scenario: Managing power integrity in ARM-based edge AI gateway with DDR4, PCIe, USB, Ethernet PHY, and SoC core rails. IC Role / Device Role / Timing Role: Single-chip solution verifying pre-boot voltage stability across heterogeneous domains before firmware execution. Use Value: Reduces boot-time uncertainty by guaranteeing all five rails meet spec before releasing RST, improving system MTBF. |
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 | Triple monitor (not quintuple); fixed 2.93V threshold; no adjustable inputs; 140ms reset timeout | Limited to three-rail systems; lacks manual reset and adjustable thresholds for custom rails | Select only when monitoring ≤3 supplies and no field-service reset is required |
| TPS3808G33DBVR | Single-channel supervisor; 3.3V fixed threshold; 200ms timeout; 1.6µA quiescent current | Requires four additional devices to match ISL88031IU8ECZ-TK's quintuple function; increases board area and BOM cost | Use only for simple single-rail backup or where ultra-low IQ dominates design priority |
Compared with MAX6326UT29D3+T and TPS3808G33DBVR, the ISL88031IU8ECZ-TK delivers integrated five-rail supervision with factory-trimmed dual thresholds and three user-configurable inputs - eliminating discrete component count, reducing PCB footprint by >75%, and enabling coordinated reset timing across heterogeneous power domains.
Availability
ISL88031IU8ECZ-TK is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard design, and industrial PLC development requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL88031IU8ECZ-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 SoC solutions for automotive, industrial, and enterprise applications.
The ISL88031 belongs to Renesas' high-accuracy voltage supervisor product line, designed specifically for multi-rail systems in telecom, datacom, and industrial equipment where simultaneous monitoring of five independent supplies is required with minimal board space and power overhead.
FAQ
What is the exact VDD and V2MON threshold voltage for ISL88031IU8ECZ-TK?
The ISL88031IU8ECZ-TK has a factory-programmed VDD threshold of 2.866V (±1.8%) and V2MON threshold of 2.333V (±1.8%), both specified 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 ISL88031IU8xCZ variants. No external calibration is needed - the thresholds are laser-trimmed during production.
Does ISL88031IU8ECZ-TK support manual reset, and how is it implemented?
Yes, ISL88031IU8ECZ-TK supports manual reset via the MR pin (Pin 1), an active-low, debounced input with internal 10kΩ pull-up. Pulling MR ≤0.8V for ≥550ns asserts RST low for the full 120ms POR timeout period. This allows push-button recovery or remote reset signaling without external components - a feature verified in the "Manual Reset" section (Page 5) and functional block diagram (Page 3) of the ISL88031 datasheet.
Can ISL88031IU8ECZ-TK monitor voltages higher than 3.3V on its adjustable inputs?
No - the adjustable inputs (V3MON, V4MON, V5MON) reference an internal 0.600V threshold; they cannot directly monitor voltages above the IC's absolute maximum rating of 7V. To supervise >3.3V rails, use a resistor divider to scale the input so that the voltage at the pin equals 0.600V when the rail reaches the desired trip point (e.g., 5.0V rail → 8.33:1 divider). Equation 1 on Page 6 of FN8227 confirms this scaling method applies to ISL88031IU8ECZ-TK.
What is the operating temperature range and package type of ISL88031IU8ECZ-TK?
The ISL88031IU8ECZ-TK operates from –40°C to +85°C (industrial grade) and is packaged in an 8-lead MSOP (M8.118 outline), 3.0mm × 3.0mm body, 0.65mm pitch, RoHS-compliant matte tin finish. This is explicitly stated in the "Ordering Information" table (Page 2) and "Package Outline Drawing" (Page 9) of the FN8227 datasheet, with thermal resistance θJA = 175°C/W.
How does ISL88031IU8ECZ-TK handle power-supply transients during operation?
The ISL88031IU8ECZ-TK incorporates hysteresis (29mV on VTH1, 23mV on VTH2) and internal filtering to reject transients <6µs, as documented in the "Principles of Operation" (Page 5) and Figure 6 (tRPD = 7.5µs). Its bandgap reference and comparator design make it immune to brief supply droops - a key differentiator validated in Renesas' characterization testing and cited in the "Features" list on Page 1.
ISL88031IU8ECZ-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:
- 2.333V, 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
ISL88031IU8ECZ-TK FAQ
1.How can I place an order for ISL88031IU8ECZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88031IU8ECZ-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 ISL88031IU8ECZ-TK reliable?
The price and inventory of ISL88031IU8ECZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88031IU8ECZ-TK is usually 5 days.
3.What payment methods are accepted for ISL88031IU8ECZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88031IU8ECZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88031IU8ECZ-TK?
ISL88031IU8ECZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88031IU8ECZ-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 ISL88031IU8ECZ-TK?
For technical support, including ISL88031IU8ECZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88031IU8ECZ-TK requirements.
6.How does Aetrix verify that ISL88031IU8ECZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL88031IU8ECZ-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 ISL88031IU8ECZ-TK meets industry standards.
7.What is the process for return or replacement of ISL88031IU8ECZ-TK?
All ISL88031IU8ECZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88031IU8ECZ-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 ISL88031IU8ECZ-TK part is unused and in its original packaging.
Return procedure for ISL88031IU8ECZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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