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Renesas ISL88021IU8FCZ
- Part No.:
- ISL88021IU8FCZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL88021IU8FCZ.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,015
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Product details
Overview
ISL88021IU8FCZ from Intersil is a triple voltage monitor IC with adjustable power-on-reset, undervoltage monitoring on VDD (3.09V threshold), V2MON (2.32V fixed), and V3MON (UV detection referenced to 0.605V), designed for system-level power supervision in embedded controllers and multi-rail systems. It delivers active-low open-drain RST and active-high push-pull RST outputs, supports manual reset via MR pin, and operates from 2.0V to 5.5V supply.
For engineers reviewing the ISL88021IU8FCZ datasheet, ISL88021IU8FCZ pinout, ISL88021IU8FCZ application, or ISL88021IU8FCZ equivalent, key selection criteria include its 3.09V/2.32V dual fixed thresholds, UV-only V3MON capability, 140–200ms POR timeout (adjustable via CPOR capacitor), 20µA quiescent current, and 8-lead MSOP package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The ISL88021IU8FCZ implements independent comparator-based monitoring of three rails: VDD (fixed 3.09V trip), V2MON (fixed 2.32V trip), and V3MON (undervoltage only, referenced to internal 0.605V ±11mV). Reset assertion occurs when any monitored rail falls below its threshold, and remains asserted until all rails stabilize for ≥140ms (tPOR).
Power-on-reset timing is controlled by an internal counter gated by CPOR pin capacitance-open CPOR yields ~140–200ms delay, scalable up to ~10× with ≤50pF external capacitor. The MR input features 20kΩ internal pull-up and 550ns minimum pulse width support, enabling robust push-button or logic-driven reset initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.09V ±0.056V over –40°C to +85°C; ensures reliable microcontroller startup at nominal 3.3V rail |
| V2MON Threshold | 2.32V ±0.042V; monitors secondary supply (e.g., 2.5V I/O or analog rail) with 23mV hysteresis |
| V3MON Reference | 0.605V ±11mV internal reference; enables precise UV detection of >0.6V supplies via resistor divider |
| tPOR Delay | 140–200ms (CPOR open); extends to longer durations with external capacitor-critical for FPGA configuration timing |
| Supply Current | 15µA typical at 5V; enables low-power supervision in battery-backed or always-on systems |
| Reset Outputs | RST (open-drain, VOL ≤0.4V @ 2.5mA) and RST (push-pull, VOH ≥VDD–0.4V); supports mixed-logic interface requirements |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded control and instrumentation environments |
Pinout & Package
ISL88021IU8FCZ is housed in an 8-lead MSOP package (JEDEC MO-187AA), measuring 3.0mm × 3.0mm × 0.95mm, with exposed pad not electrically connected. Pin spacing is 0.65mm pitch; lead finish is Pb-free plus anneal (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Debounced input with 20kΩ internal pull-up; asserts reset when pulled <0.8V for ≥550ns |
| 2 VDD | Main power supply input | Supplies internal circuitry; reset valid down to VDD = 1V; operates 2.0–5.5V |
| 3 V2MON | Fixed-threshold undervoltage monitor input | Monitors second rail at 2.32V; comparator output feeds reset logic |
| 4 GND | Ground reference | Common return path for all internal comparators and outputs |
| 5 V3MON | Adjustable undervoltage monitor input | Compares external divided voltage to 0.605V reference; supports UV only (ISL88021) |
| 6 CPOR | Power-on-reset timeout capacitor connection | External capacitor sets tPOR delay; 0–50pF range scales delay from ~140ms to >1s |
| 7 RST | Active-low open-drain reset output | Drives low during reset; requires external pull-up; sinks 2.5mA max |
| 8 RST | Active-high push-pull reset output | Drives high during normal operation; sources 2.5mA min; no external pull-up needed |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent voltage monitoring | Simultaneous supervision of VDD (3.09V), V2MON (2.32V), and V3MON (UV only) prevents false resets from single-rail transients |
| Adjustable POR timeout | Capacitor-programmable tPOR allows precise alignment with FPGA config time or oscillator stabilization without firmware changes |
| Dual reset outputs (RST/RST) | Eliminates need for external level-shifting or inverters-supports both active-low and active-high reset architectures |
| Low 20µA quiescent current | Minimizes impact on standby power budget in always-on supervisory circuits |
| Manual reset with internal pull-up | Reduces BOM count by eliminating external resistor; simplifies push-button integration |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Supervises 3.3V CPU core, 2.5V I/O, and 1.8V analog sensor rails in programmable logic controller modules. IC Role / Device Role / Timing Role: Triple voltage monitor asserting reset if any rail drops below spec-ensures deterministic boot after brownout or hot-swap event. Use Value: Prevents corrupted state machine execution by holding processor in reset until all rails stabilize for ≥140ms post-recovery. |
Use Scenario: Monitors backup battery voltage, main 5V supply, and isolated 3.3V ADC reference in portable ultrasound units. IC Role / Device Role / Timing Role: Detects undervoltage on critical analog rails before data acquisition begins; triggers graceful shutdown sequence. Use Value: Guarantees measurement integrity by disabling signal chain prior to supply collapse-avoids invalid waveform capture. |
| Telecom Line Cards | Automotive Infotainment ECUs |
Use Scenario: Validates 12V-to-3.3V DC/DC output, 3.3V PHY interface, and 1.2V DDR termination voltage in Ethernet switch line cards. IC Role / Device Role / Timing Role: Independent V2MON and V3MON inputs track auxiliary rails while VDD monitors primary regulator; all feed unified reset generator. Use Value: Enables single-chip supervision of heterogeneous power domains-reduces board area vs. discrete supervisors. |
Use Scenario: Supervises 5V infotainment SoC supply, 3.3V CAN transceiver rail, and 1.8V display interface in head-unit designs. IC Role / Device Role / Timing Role: Uses V3MON with resistor divider to detect UV on 5V rail; V2MON tracks 3.3V CAN bus supply. Use Value: Ensures CAN communication remains functional during partial brownout by maintaining 3.3V rail integrity independently. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361KA29D3+T | Fixed 2.93V VDD threshold; no V2MON/V3MON adjustability; 120ms fixed POR; 1.6µA IQ | Lacks dual auxiliary monitor inputs; suitable only for single-rail reset with ultra-low IQ | Select when only primary rail supervision is required and power budget is <5µA |
| TPS3808G33DBVR | Single-supply monitor (3.3V only); no V2MON/V3MON; 200ms fixed POR; 16µA IQ; includes watchdog timer | No multi-rail capability; adds watchdog functionality absent in ISL88021IU8FCZ | Select when system requires watchdog timeout recovery but only one supply needs monitoring |
Compared with MAX6361KA29D3+T and TPS3808G33DBVR, the ISL88021IU8FCZ uniquely provides three independent, configurable voltage monitoring channels in one 8-pin MSOP-enabling compact, cost-effective supervision of complex multi-rail systems without external comparators or timing components.
Availability
ISL88021IU8FCZ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom line cards, automotive infotainment ECUs, and portable/battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL88021IU8FCZ 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-reliability supervisory, interface, and precision analog products.
The ISL88021IU8FCZ belongs to Intersil's triple voltage supervisor family, engineered specifically for robust, low-component-count power sequencing and fault detection in industrial, medical, and communications equipment where multi-rail integrity is mission-critical.
FAQ
What is the VDD voltage threshold for ISL88021IU8FCZ?
The ISL88021IU8FCZ has a fixed VDD trip point of 3.09V with ±0.056V tolerance over –40°C to +85°C. This threshold is factory-trimmed and applies specifically to the IU8FCZ variant, as confirmed in the FN8226 datasheet ordering table. The device holds reset until VDD rises above this threshold and remains stable for the full tPOR period.
Does ISL88021IU8FCZ support overvoltage monitoring on V3MON?
No, ISL88021IU8FCZ supports undervoltage (UV) monitoring only on V3MON, as indicated by "UV" in the ordering table row for ISL88021IU8FCZ. The ISL88022 variants provide overvoltage (OV) capability on V3MON; ISL88021IU8FCZ uses the same 0.605V internal reference but compares external voltage for UV condition only.
How is the power-on-reset timeout adjusted for ISL88021IU8FCZ?
The ISL88021IU8FCZ tPOR delay is adjusted by connecting a capacitor between CPOR pin and GND. With CPOR open, tPOR is 140–200ms; adding up to 50pF scales the delay linearly per Figure 2 in FN8226. Layout must minimize stray capacitance on CPOR to avoid timing error-no PCB pad is required for default timing.
What are the reset output types provided by ISL88021IU8FCZ?
The ISL88021IU8FCZ provides two complementary reset outputs: RST is active-low open-drain (requires external pull-up), and RST is active-high push-pull (no external components needed). Both assert simultaneously during reset and release together after tPOR, supporting diverse host processor interface requirements.
Is ISL88021IU8FCZ RoHS compliant and what is its package type?
Yes, ISL88021IU8FCZ is RoHS compliant under the "Pb-Free Plus Anneal" construction, featuring 100% matte tin termination and compatible with SnPb and Pb-free reflow. Its package is an 8-lead MSOP (Mini Small Outline Plastic) per JEDEC MO-187AA, with 3.0mm × 3.0mm body and 0.65mm lead pitch.
ISL88021IU8FCZ 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:
- 3
- Voltage - Threshold:
- 2.332V, 3.085V, Adj
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ISL88021IU8FCZ FAQ
1.How can I place an order for ISL88021IU8FCZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88021IU8FCZ 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 ISL88021IU8FCZ reliable?
The price and inventory of ISL88021IU8FCZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88021IU8FCZ is usually 5 days.
3.What payment methods are accepted for ISL88021IU8FCZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88021IU8FCZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88021IU8FCZ?
ISL88021IU8FCZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88021IU8FCZ 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 ISL88021IU8FCZ?
For technical support, including ISL88021IU8FCZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88021IU8FCZ requirements.
6.How does Aetrix verify that ISL88021IU8FCZ is sourced from the original manufacturer or authorized distributors?
All ISL88021IU8FCZ 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 ISL88021IU8FCZ meets industry standards.
7.What is the process for return or replacement of ISL88021IU8FCZ?
All ISL88021IU8FCZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL88021IU8FCZ, 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 ISL88021IU8FCZ part is unused and in its original packaging.
Return procedure for ISL88021IU8FCZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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