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Renesas ISL88001IH31Z-T
- Part No.:
- ISL88001IH31Z-T
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ISL88001IH31Z-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,504
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Product details
Overview
ISL88001IH31Z-T 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. It monitors VDD in microcontroller-based systems where reliable brownout detection and clean startup sequencing are required.
For engineers reviewing the ISL88001IH31Z-T datasheet, ISL88001IH31Z-T pinout, ISL88001IH31Z-T application, or ISL88001IH31Z-T equivalent, this page delivers verified electrical specs, package dimensions, functional role in power sequencing, and validated drop-in alternatives for industrial and portable designs.
Technical Context
The ISL88001IH31Z-T integrates a precision bandgap reference, comparator with hysteresis, and POR circuitry to assert reset when VDD falls below 3.07V (±1.2%) or rises from 0V to 1V. Its internal architecture ensures reset remains valid down to VDD = 1V, enabling robust operation during deep brownouts.
It operates across –40°C to +85°C, consumes only 160nA at 1.8V, and features 1% hysteresis to prevent noise-induced chatter. The push-pull RST output drives directly without external pull-up, simplifying layout and reducing BOM count in space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.07V ±1.2% - precisely monitors 3.3V rail with margin for tolerance and drift |
| Supply Current | 160nA typical - enables multi-year battery life in always-on sensor nodes |
| POR Timeout | 190ms nominal - ensures stable MCU clock and register initialization before release |
| Reset Valid Down To | VDD = 1V - guarantees reset assertion even during severe undervoltage conditions |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor, reduces component count |
| Operating Temp | –40°C to +85°C - supports industrial-grade embedded and automotive accessory applications |
| Hysteresis | 1% - prevents oscillation near threshold during noisy or slowly recovering power rails |
Pinout & Package
ISL88001IH31Z-T is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236), measuring 2.92mm × 1.30mm × 1.00mm, with gull-wing leads and 0.95mm pitch. It is RoHS-compliant and MSL-1 rated.
| 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 asserts LOW when VDD < 3.07V; releases HIGH when VDD > 3.07V + hysteresis; no external pull-up required |
| 3 (VDD) | Power supply & monitored input | Serves as both IC supply and analog input for voltage supervision; internally compared against 3.07V reference |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.07V threshold | Matches standard 3.3V rail with 300mV headroom, eliminating need for external resistor divider or trimming |
| 160nA quiescent current | Reduces standby power by >90% vs. legacy supervisors, critical for coin-cell-powered IoT endpoints |
| 190ms POR timeout | Guarantees sufficient delay for oscillator stabilization and firmware boot sequence before releasing reset |
| Valid reset at VDD = 1V | Ensures deterministic behavior during deep brownout recovery, preventing MCU lockup or undefined state |
| No external components | Enables single-component solution for reset generation-no capacitors, resistors, or diodes required |
Applications
| Microprocessor Power Sequencing | Portable Medical Sensors |
|---|---|
|
Use Scenario: Ensuring safe boot of ARM Cortex-M microcontrollers in handheld diagnostic devices after battery insertion or low-voltage recovery. IC Role / Device Role / Timing Role: Voltage supervisor providing active-low reset signal synchronized to 3.3V rail stability, with 190ms POR delay matching MCU bootloader timing. Use Value: Prevents execution of corrupted code due to insufficient VDD, eliminating field failures caused by premature wake-up from deep sleep. |
Use Scenario: Maintaining reliable operation of wearable ECG sensors powered by CR2032 batteries over multi-year shelf life. IC Role / Device Role / Timing Role: Ultra-low-power supervisor monitoring declining battery voltage and asserting reset before ADC or BLE radio malfunction occurs. Use Value: 160nA supply current extends usable battery life by >25% versus comparable supervisors, while 3.07V threshold aligns with end-of-life battery voltage. |
| Industrial PLC I/O Modules | Smart Home Hub Power Management |
|
Use Scenario: Protecting programmable logic controller modules from erratic behavior during AC/DC converter transients or line sags. IC Role / Device Role / Timing Role: Immune-to-transient supervisor asserting reset on VDD dip below 3.07V, with 1% hysteresis preventing chatter during marginal recovery. Use Value: Eliminates spurious reboots in factory environments with high EMI and unstable mains, improving system uptime and diagnostics reliability. |
Use Scenario: Enabling graceful shutdown and restart of Wi-Fi/BLE hubs during USB-C power adapter disconnect or surge events. IC Role / Device Role / Timing Role: Single-supervisor solution generating clean reset pulse on 3.3V rail collapse, interfacing directly with hub SoC's nRESET pin. Use Value: Push-pull output drives SoC reset without pull-up resistor, saving PCB area and cost in compact 2-layer consumer PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 3.08V threshold, ±2.5% accuracy, 2.5µA supply current, SOT-23-3 | Higher quiescent current limits use in battery-critical designs; same pinout but less precise threshold | Select when legacy compatibility with Maxim footprint is required and 160nA is not mandatory |
| TPS3801K33DBVR | 3.08V threshold, ±0.5% accuracy, 1.8µA supply current, SOT-23-3 | Superior accuracy but 11× higher current; lacks 1V minimum operating voltage guarantee | Prefer for high-precision rail monitoring where power budget allows; avoid in energy-harvesting or long-life battery apps |
Compared with MAX809SEUR+T and TPS3801K33DBVR, the ISL88001IH31Z-T delivers the lowest power consumption and widest valid reset range (down to 1V), making it uniquely suited for ultra-low-power, brownout-resilient embedded systems where every nanoamp matters.
Availability
ISL88001IH31Z-T is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical sensors, industrial PLC I/O modules, smart home hubs, and battery-backed real-time clocks requiring stable component supply and long-term lifecycle support.
Supply support for ISL88001IH31Z-T 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 high-performance, low-power microcontrollers, analog, and power management solutions for industrial, automotive, and IoT markets.
The ISL88001IH31Z-T belongs to Renesas' ultra-low-power voltage supervisor family, designed specifically for energy-constrained applications requiring guaranteed reset behavior across wide temperature and voltage ranges.
FAQ
What is the exact reset threshold voltage of the ISL88001IH31Z-T?
The ISL88001IH31Z-T has a nominal reset threshold of 3.07V, with guaranteed accuracy of ±1.2% over –40°C to +85°C. At +25°C, the specification is 3.038V (min) to 3.112V (max); full temperature range limits are 3.000V to 3.150V per datasheet FN6174 Rev 3.00.
Does the ISL88001IH31Z-T require an external pull-up resistor on the RST pin?
No. The ISL88001IH31Z-T features a push-pull active-low RST output, meaning it actively drives LOW during reset and HIGH when released. Unlike open-drain variants (e.g., ISL88002), it requires no external pull-up resistor, simplifying design and reducing BOM count.
Can the ISL88001IH31Z-T operate reliably when VDD drops below 1.8V?
Yes. The ISL88001IH31Z-T guarantees valid reset assertion down to VDD = 1V, as confirmed in the datasheet's "Reset Signal Valid Down to VDD = 1V" feature and Absolute Maximum Ratings. This enables robust brownout protection even during deep undervoltage events.
What is the power-on reset timeout duration for the ISL88001IH31Z-T?
The ISL88001IH31Z-T provides a nominal 190ms power-on reset timeout (tPOR), with datasheet-specified range of 140ms to 260ms over temperature. This delay ensures sufficient time for microcontroller oscillator stabilization and register initialization before releasing the reset signal.
Is the ISL88001IH31Z-T pin-compatible with other members of the ISL8800x family?
Yes - all ISL88001, ISL88002, and ISL88003 variants share identical 3-lead SOT-23 pinout (GND, RST, VDD). However, ISL88001IH31Z-T (push-pull active-low) is not functionally interchangeable with ISL88002IH31Z-T (open-drain active-low) or ISL88003IH31Z-T (push-pull active-high) without circuit modification.
ISL88001IH31Z-T 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-T FAQ
1.How can I place an order for ISL88001IH31Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88001IH31Z-T 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-T reliable?
The price and inventory of ISL88001IH31Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88001IH31Z-T is usually 5 days.
3.What payment methods are accepted for ISL88001IH31Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88001IH31Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88001IH31Z-T?
ISL88001IH31Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88001IH31Z-T 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-T?
For technical support, including ISL88001IH31Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88001IH31Z-T requirements.
6.How does Aetrix verify that ISL88001IH31Z-T is sourced from the original manufacturer or authorized distributors?
All ISL88001IH31Z-T 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-T meets industry standards.
7.What is the process for return or replacement of ISL88001IH31Z-T?
All ISL88001IH31Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL88001IH31Z-T, 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-T part is unused and in its original packaging.
Return procedure for ISL88001IH31Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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