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Renesas ISL88001IH31Z-TK
- Part No.:
- ISL88001IH31Z-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ISL88001IH31Z-TK.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,639
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Product details
Overview
ISL88001IH31Z-TK from Renesas Electronics is an ultra-low-power 3-pin voltage supervisor IC with push-pull active-low reset output, 3.07V fixed threshold, ±1.2% accuracy, 160nA supply current, and 190ms power-on reset timeout - used to ensure reliable microprocessor startup and brownout protection in battery-powered embedded systems.
For engineers reviewing the ISL88001IH31Z-TK datasheet, ISL88001IH31Z-TK pinout, ISL88001IH31Z-TK application, or ISL88001IH31Z-TK equivalent, key selection criteria include reset polarity (active-low), output drive type (push-pull), minimum valid VDD (1V), hysteresis-enabled noise immunity, and compatibility with 3.3V logic rails in space-constrained portable designs.
Technical Context
The ISL88001IH31Z-TK implements a precision bandgap-based voltage reference comparator with internal hysteresis to prevent false resets during supply transients. It asserts reset when VDD falls below 3.07V (±1.2%) and holds reset for ≥190ms after VDD rises above threshold.
Its internal POR circuit activates at VDD = 1V, ensuring early assertion before system logic becomes functional. The push-pull RST output drives directly to GND or VDD without external pull-up, simplifying interface with µP reset inputs requiring active-low assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.07V ±1.2% - precisely monitors 3.3V supply rails with guaranteed margin against undervoltage faults |
| Supply Current | 160nA typical - enables multi-year operation on coin-cell batteries in always-on monitoring applications |
| POR Timeout | 190ms nominal - ensures sufficient stabilization time for 3.3V LDOs and microcontroller oscillators |
| Valid VDD Range | 1.0V to 5.5V - supports reset assertion even during deep brownout conditions where core logic fails |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor and guarantees defined logic levels |
| Temperature Range | -40°C to +85°C - qualified for industrial and automotive cabin-ambient environments |
| Hysteresis | 1% of VTH - prevents chatter near trip point under noisy or slowly recovering supply conditions |
Pinout & Package
ISL88001IH31Z-TK is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236, pkg drawing P3.064), measuring 2.92mm × 1.30mm × 1.00mm, with gull-wing leads and matte tin (e3) termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | IC substrate and comparator reference node; must be connected to system ground plane for accurate threshold sensing |
| 2 - RST | Active-low reset output | Push-pull driver that sinks current to GND when asserted; connects directly to µP /RESET pin without pull-up |
| 3 - VDD | Supply input & monitored rail | Single-pin dual function: powers the IC and serves as the voltage being supervised; no external components required |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.07V threshold | Matches standard 3.3V supply tolerance (±10%), enabling direct supervision without external resistive dividers |
| 160nA quiescent current | Reduces battery drain by >90% versus legacy supervisors, extending shelf life in IoT sensor nodes |
| 1V minimum operating VDD | Ensures reset remains active through deep brownout events where MCU core voltage collapses first |
| No external components | Eliminates BOM cost and PCB area for pull-ups, capacitors, or divider networks - true 3-pin solution |
| Immunity to supply transients | Internal hysteresis and fast response (<15µs) reject short-duration noise spikes without false triggering |
Applications
| Microprocessor Power Sequencing | Portable Medical Sensors |
|---|---|
Use Scenario: Ensuring safe boot of ARM Cortex-M microcontrollers after Li-ion battery discharge to 3.2V. IC Role / Device Role / Timing Role: Voltage supervisor providing active-low reset signal synchronized to 3.3V rail recovery with 190ms hold time. Use Value: Prevents corrupted firmware execution by holding /RESET until regulated 3.3V supply stabilizes post-brownout. | Use Scenario: Continuous glucose monitor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Ultra-low-power supervisor monitoring 3.3V LDO output to detect end-of-life battery sag below 3.07V. Use Value: Enables graceful shutdown and low-battery alert generation using only 160nA standby current. |
| Industrial PLC I/O Modules | Smart Energy Meters |
Use Scenario: Protecting FPGA configuration memory during AC line sags causing 3.3V rail dip to 2.9V. IC Role / Device Role / Timing Role: Brownout detector asserting reset within 15µs of VDD crossing 3.07V threshold with hysteresis. Use Value: Avoids partial reconfiguration errors by forcing FPGA reset before voltage recovers into unstable region. | Use Scenario: Supervising isolated 3.3V DC-DC converter powering metrology ASIC in ANSI C12.20-compliant meters. IC Role / Device Role / Timing Role: High-accuracy (±1.2%) supervisor validating stable 3.3V rail before enabling high-precision ADC sampling. Use Value: Guarantees measurement integrity by preventing data capture during supply instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SUR+T | Same 3.08V threshold, SOT-23-3, push-pull active-low, but 1.2µA supply current - 7.5× higher than ISL88001IH31Z-TK | Not suitable for multi-year battery operation; acceptable for mains-powered systems with higher current budget | Select MAX809SUR+T only when legacy design reuse or second-source qualification is required, not for new ultra-low-power designs |
| TPS3801K31DBVR | 3.08V threshold, SOT-23-3, open-drain active-low, 1.8µA supply current, requires external pull-up | Lacks push-pull drive; adds BOM cost and layout complexity; higher current invalidates long-life battery use cases | Choose TPS3801K31DBVR only if system already uses open-drain reset architecture or requires adjustable threshold via external divider |
Compared with MAX809SUR+T and TPS3801K31DBVR, the ISL88001IH31Z-TK delivers 7–10× lower quiescent current and integrated push-pull drive - making it the sole choice for energy-harvesting and coin-cell-powered applications demanding guaranteed 3.07V supervision with zero external components.
Availability
ISL88001IH31Z-TK is available at Aetrix Electronics and suitable for microprocessor reset, portable medical sensors, industrial PLC I/O modules, smart energy meters, and battery-backed real-time clocks requiring stable component supply across extended product lifecycles.
Supply support for ISL88001IH31Z-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 IoT markets.
The ISL88001IH31Z-TK belongs to Renesas' ultra-low-power voltage supervisor family, engineered specifically for battery-critical applications where nanoscale current consumption and precise 3.07V threshold accuracy are mandatory for system reliability.
FAQ
What is the exact reset threshold voltage of the ISL88001IH31Z-TK and how tightly is it specified?
The ISL88001IH31Z-TK has a nominal reset threshold of 3.07V, specified over temperature with ±1.2% accuracy (i.e., 3.00V to 3.15V across -40°C to +85°C). This tight tolerance ensures robust supervision of 3.3V supplies without false triggers due to manufacturing or thermal drift, and is confirmed in the FN6174 datasheet Table "Electrical Specifications" under VTHVDD for part marking "1H31".
Does the ISL88001IH31Z-TK require any external components to operate?
No, the ISL88001IH31Z-TK operates as a fully self-contained 3-pin solution: VDD supplies power and provides the monitored voltage, GND establishes reference, and RST delivers a push-pull active-low reset signal - eliminating need for pull-up resistors, timing capacitors, or voltage dividers. This is explicitly stated in the "Features" section of the FN6174 datasheet.
What is the minimum supply voltage at which the ISL88001IH31Z-TK can assert a valid reset signal?
The ISL88001IH31Z-TK asserts reset down to VDD = 1.0V, enabling reliable brownout detection even when the 3.3V rail collapses deeply - a critical capability for preserving system state during catastrophic power loss. This specification is documented in the "Features" list and "Electrical Specifications" table of the FN6174 datasheet.
How does the ISL88001IH31Z-TK differ from the ISL88002 and ISL88003 variants in the same family?
The ISL88001IH31Z-TK features a push-pull active-low RST output; ISL88002IH31Z-TK uses open-drain active-low (requiring external pull-up); ISL88003IH31Z-TK provides push-pull active-high RST. All share identical 3.07V threshold, 160nA current, and 190ms timeout. Pinout is identical across all three, enabling layout reuse with only firmware or schematic net changes.
Is the ISL88001IH31Z-TK pin-compatible with industry-standard supervisors like the MAX809?
Yes, the ISL88001IH31Z-TK is explicitly stated as pin-compatible with MAX803, MAX809, and MAX810 in the FN6174 datasheet "Features" section. Its SOT-23-3 footprint, 3.07V threshold (vs. MAX809's 3.08V), push-pull active-low output, and identical pin 1–2–3 assignment (GND–RST–VDD) enable drop-in replacement in existing designs without PCB modification.
ISL88001IH31Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ISL88001IH31Z-TK FAQ
1.How can I place an order for ISL88001IH31Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88001IH31Z-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 ISL88001IH31Z-TK reliable?
The price and inventory of ISL88001IH31Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88001IH31Z-TK is usually 5 days.
3.What payment methods are accepted for ISL88001IH31Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88001IH31Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88001IH31Z-TK?
ISL88001IH31Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88001IH31Z-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 ISL88001IH31Z-TK?
For technical support, including ISL88001IH31Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88001IH31Z-TK requirements.
6.How does Aetrix verify that ISL88001IH31Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL88001IH31Z-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 ISL88001IH31Z-TK meets industry standards.
7.What is the process for return or replacement of ISL88001IH31Z-TK?
All ISL88001IH31Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88001IH31Z-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 ISL88001IH31Z-TK part is unused and in its original packaging.
Return procedure for ISL88001IH31Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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