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Renesas ISL88003IE31Z-T7A
- Part No.:
- ISL88003IE31Z-T7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ISL88003IE31Z-T7A.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,272
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Product details
Overview
ISL88003IE31Z-T7A from Renesas Electronics is an ultra-low-power 3-pin voltage supervisor IC with push-pull active-high reset output, 3.07V fixed threshold (±1.2% accuracy), 160nA supply current at 1.8V, and 190ms power-on reset timeout. It monitors VDD in microcontroller systems where reliable brownout detection and low-quiescent-power supervision are critical.
For engineers reviewing the ISL88003IE31Z-T7A datasheet, ISL88003IE31Z-T7A pinout, ISL88003IE31Z-T7A application, or ISL88003IE31Z-T7A equivalent, key selection criteria include reset polarity compatibility, SC-70 package footprint constraints, VDD monitoring down to 1V, and direct replacement suitability for MAX803/809/810-based designs.
Technical Context
The ISL88003IE31Z-T7A implements a factory-trimmed bandgap reference comparator with hysteresis to detect falling VDD below its 3.07V trip point and assert a clean, glitch-free active-high reset signal. Its internal POR circuit activates at VDD = 1V and holds RST high for ≥140ms after VDD exceeds threshold.
This device operates across -40°C to +85°C with ±0.48mV/°C threshold drift and requires no external components. The push-pull RST output drives directly into µP reset inputs without pull-up resistors, distinguishing it from open-drain variants like ISL88002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.07V ±1.2% - precisely monitors 3.3V rails with guaranteed margin against nominal supply tolerance. |
| Supply Current | 160nA at 1.8V - enables multi-year battery life in portable equipment without compromising supervision reliability. |
| POR Timeout | 190ms typical - ensures sufficient delay for FPGA configuration, oscillator stabilization, and register initialization. |
| Reset Output Type | Push-pull active-high - eliminates need for external pull-up resistor and provides rail-to-rail logic-level drive. |
| Operating Voltage Range | 1.8V to 5.5V - supports supervision of 1.8V, 2.5V, 3.3V, and 5.0V supplies with same device family. |
| Reset Valid Down To | VDD = 1V - guarantees functional reset assertion even during deep brownout or low-battery conditions. |
| Package | 3-lead SC-70 (P3.049) - 1.8 × 2.2 mm footprint ideal for space-constrained portable PCBs. |
Pinout & Package
3-lead SC-70 package (P3.049), RoHS-compliant, Pb-free NiPdAu termination, MSL3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | IC substrate and comparator reference node; must be connected to system ground plane with low-impedance path. |
| 2 RST | Active-high push-pull reset output | Drives HIGH (to VDD) when VDD ≥ 3.07V; LOW (to GND) when VDD < 3.07V or during POR - directly interfaces µP reset input. |
| 3 VDD | Power supply and monitored input | Supplies IC bias current and serves as the sensed rail; no separate sense pin required - simplifies layout. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.07V threshold | Eliminates external resistor divider tuning and reduces BOM count in 3.3V system designs. |
| 160nA quiescent current | Enables always-on supervision in energy-harvesting and coin-cell-powered devices without measurable battery drain. |
| 190ms POR timeout | Guarantees µP remains held in reset long enough for clock stabilization and firmware boot sequence initiation. |
| Immunity to supply transients | Hysteresis and internal filtering prevent false resets during short-duration noise spikes on VDD. |
| SC-70 footprint | Reduces board area by >40% vs. SOT-23 while maintaining identical pinout and thermal performance (θJA = 640°C/W). |
Applications
| Microprocessor Power-Up Sequencing | Battery-Powered IoT Sensor Node |
|---|---|
|
Use Scenario: Ensuring reliable boot of ARM Cortex-M0+ MCU after Li-ion battery wake-up from deep sleep. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output and asserts active-high reset until voltage stabilizes above 3.07V for ≥190ms. Use Value: Prevents corrupted firmware execution due to marginal VDD during cold-start or low-battery recovery. |
Use Scenario: Supervising power rail in BLE-enabled environmental sensor with 10-year coin-cell target lifetime. IC Role / Device Role / Timing Role: Provides brownout detection and POR using only 160nA supply current, enabling continuous monitoring. Use Value: Extends operational life by eliminating periodic polling and ensuring deterministic reset behavior under voltage sag. |
| Industrial Controller Watchdog Interface | Portable Medical Diagnostic Device |
|
Use Scenario: Integrating with external watchdog timer to force hard reset if main controller fails to strobe within timeout window. IC Role / Device Role / Timing Role: Generates clean, glitch-free active-high reset pulse upon VDD drop below 3.07V, synchronized with watchdog assertion. Use Value: Eliminates risk of metastability or partial reset states that could leave safety-critical peripherals in undefined mode. |
Use Scenario: Power sequencing in handheld ECG monitor requiring FDA-compliant fault-free startup under varying battery conditions. IC Role / Device Role / Timing Role: Holds system in reset until 3.3V rail reaches stable operating level post-power-on, with reset valid down to 1V. Use Value: Meets IEC 62304 software lifecycle requirements by guaranteeing deterministic hardware-initiated reset before firmware execution. |
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 (±1.5%), 1.2µA supply current, SOT-23-3 package, open-drain active-low RST. | Requires external pull-up resistor; higher current draw limits use in ultra-low-power designs. | Select when legacy MAX809 footprint compatibility is mandatory and active-low reset logic is already implemented. |
| TPS3801K33DBVR | 3.08V threshold (±0.5%), 2.5µA supply current, SOT-23-3, push-pull active-low RST, 200ms timeout. | Active-low output incompatible without logic inversion; higher IDD increases battery load. | Choose for tighter threshold accuracy where active-low reset is acceptable and higher quiescent current is tolerable. |
Compared with MAX809SEUR+T and TPS3801K33DBVR, the ISL88003IE31Z-T7A delivers 7.8× lower supply current than MAX809 and native active-high push-pull output - reducing component count and extending battery life in portable medical and industrial edge devices.
Availability
ISL88003IE31Z-T7A is available at Aetrix Electronics and suitable for microcontroller power-up sequencing, battery-powered IoT sensor nodes, and portable medical diagnostic devices requiring stable component supply and long-term production continuity.
Supply support for ISL88003IE31Z-T7A 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 connectivity solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL88003 belongs to Renesas' ultra-low-power voltage supervisor product line, engineered specifically for space- and energy-constrained embedded systems requiring precise, reliable power-on reset and brownout protection without external components.
FAQ
What is the exact reset threshold voltage of the ISL88003IE31Z-T7A?
The ISL88003IE31Z-T7A has a nominal reset threshold of 3.07V with ±1.2% accuracy over -40°C to +85°C. At +25°C, the typical value is 3.075V, and the full range spans 3.000V to 3.150V. This threshold is factory-trimmed and applies specifically to the ISL88003IE31Z-T7A variant in SC-70 packaging.
Does the ISL88003IE31Z-T7A require external components for basic operation?
No, the ISL88003IE31Z-T7A requires no external components for standard voltage supervision and power-on reset functionality. Its push-pull active-high RST output drives directly into microcontroller reset inputs, and the single VDD pin serves both as power supply and monitored rail - eliminating the need for resistive dividers, pull-up resistors, or timing capacitors.
How does the ISL88003IE31Z-T7A differ from the ISL88001 and ISL88002 in the same family?
The ISL88003IE31Z-T7A features a push-pull active-high RST output, whereas ISL88001 also uses push-pull but is active-low, and ISL88002 uses open-drain active-low output requiring an external pull-up. All three share identical 3.07V threshold, 160nA current, and SC-70 packaging - but output polarity and drive architecture differentiate their system interface requirements.
Is the ISL88003IE31Z-T7A pin-compatible with MAX803, MAX809, or MAX810?
Yes, the ISL88003IE31Z-T7A is pin-compatible with MAX803, MAX809, and MAX810 in SC-70 and SOT-23 packages. However, its active-high push-pull output differs from the active-low outputs of those Maxim parts - requiring verification of reset logic polarity in the target system before drop-in replacement.
What is the minimum VDD voltage at which the ISL88003IE31Z-T7A can assert a valid reset signal?
The ISL88003IE31Z-T7A guarantees valid reset assertion down to VDD = 1V. Its internal POR circuit activates at this level, and the RST output remains functional (driving HIGH or LOW as appropriate) even during severe brownout conditions - a critical capability for fail-safe operation in battery-powered applications.
ISL88003IE31Z-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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 High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ISL88003IE31Z-T7A FAQ
1.How can I place an order for ISL88003IE31Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88003IE31Z-T7A 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 ISL88003IE31Z-T7A reliable?
The price and inventory of ISL88003IE31Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88003IE31Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL88003IE31Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88003IE31Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88003IE31Z-T7A?
ISL88003IE31Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88003IE31Z-T7A 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 ISL88003IE31Z-T7A?
For technical support, including ISL88003IE31Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88003IE31Z-T7A requirements.
6.How does Aetrix verify that ISL88003IE31Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL88003IE31Z-T7A 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 ISL88003IE31Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL88003IE31Z-T7A?
All ISL88003IE31Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL88003IE31Z-T7A, 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 ISL88003IE31Z-T7A part is unused and in its original packaging.
Return procedure for ISL88003IE31Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL88003IE31Z-T7A Tags
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MIC826SYMT-TR
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