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Renesas ISL88706IB826Z
- Part No.:
- ISL88706IB826Z
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL88706IB826Z.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,573
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Product details
Overview
ISL88706IB826Z from Renesas (formerly Intersil) is a microprocessor supervisor IC with fixed 2.63V VDD reset threshold, active-low and active-high reset outputs, watchdog timer, power-fail monitor, and manual reset input. It operates from 2.0V to 5.5V supply, consumes ≤10µA at 3V, and asserts reset down to VDD = 1V - ideal for battery-backed industrial controllers requiring reliable brownout detection.
For engineers reviewing the ISL88706IB826Z datasheet, ISL88706IB826Z pinout, ISL88706IB826Z application, or ISL88706IB826Z equivalent, key selection criteria include ±1.8% voltage threshold accuracy, 140ms minimum reset pulse width, immunity to power-supply transients, dual RST/RST outputs, and compatibility with portable, notebook, and DSP-based systems.
Technical Context
The ISL88706IB826Z integrates a precision bandgap reference, POR circuit with 200ms nominal timeout, hysteresis-enabled VDD supervision (2.63V ±1.8%), and a dedicated 1.25V PFI comparator for auxiliary voltage monitoring. Its watchdog timer features a 1.6s typical timeout and clears on WDI edge transitions.
It provides both active-low RST (PMOS pull-up) and active-high RST (push-pull) outputs, with reset assertion during power-up, brownout (VDD < 2.63V), MR low, or watchdog timeout. The MR input includes internal 20kΩ pull-up and debouncing, and reset remains asserted for ≥200ms after VDD recovery or MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 2.63V ±1.8% - ensures precise brownout detection for 2.7V–3.3V logic rails without false resets. |
| Supply Current | ≤10µA at 3V - enables multi-year operation in coin-cell–powered backup circuits. |
| Reset Pulse Width | ≥140ms - guarantees sufficient hold time for FPGA configuration or microcontroller initialization. |
| Watchdog Timeout | 1.6s typical - balances fault detection responsiveness with tolerance for brief software stalls. |
| PFI Threshold | 1.25V fixed - supports low-battery warning or external rail monitoring via resistor divider. |
| Operating Temp | -40°C to +85°C - validated for industrial embedded environments without derating. |
| Reset Validity | Down to VDD = 1V - maintains supervision integrity during deep brownout or battery sag. |
Pinout & Package
ISL88706IB826Z is housed in an 8-lead SOIC package (JEDEC MS-012-AA, RoHS-compliant, M8.15 outline), with 1.27mm lead pitch, 4.00mm body width, and 5.00mm body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Active-low debounced input with 20kΩ internal pull-up; triggers reset when pulled below 0.8V for ≥550ns. |
| 2 VDD | Power Supply Input | Main supply rail monitored against 2.63V threshold; reset asserted if VDD drops below trip point with hysteresis. |
| 3 GND | Ground Reference | Common return path for all internal comparators, watchdog, and output drivers. |
| 4 PFI | Power-Fail Input | Auxiliary voltage monitor input with 1.25V threshold; used for low-battery warning or secondary rail supervision. |
| 5 PFO | Power-Fail Output | Open-drain output that goes high when PFI > 1.25V; signals healthy auxiliary voltage condition. |
| 6 WDI | Watchdog Input | Edge-sensitive input; toggling within 1.6s prevents watchdog timeout and WDO assertion. |
| 7 RST | Active-Low Reset Output | PMOS pull-up output driven low during reset; sinks 2.5mA at VDD ≥ 3.3V with VOL ≤ 0.4V. |
| 8 RST | Active-High Reset Output | Push-pull output driven high to VDD during reset; sources 0.8mA at VDD ≥ 3.3V with VOH ≥ VDD−0.6V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual RST outputs | Simultaneous active-low (RST) and active-high (RST) reset signals eliminate need for external inverters in mixed-logic systems. |
| Ultra-low quiescent current | 10µA max at 3V enables integration into always-on battery monitors without compromising runtime. |
| Immunity to supply transients | Hysteresis (31mV at 2.63V) and internal filtering prevent false resets from noise or short-duration droops. |
| Power-fail detection | 1.25V PFI threshold with 20mV hysteresis allows reliable low-battery warning or presence detection of auxiliary supplies. |
| Manual reset with debouncing | Internal 20kΩ pull-up and hardware debounce simplify push-button interface and reduce firmware dependency. |
Applications
| Battery-Powered Data Logger | Notebook System Power Management |
|---|---|
|
Use Scenario: Long-term environmental sensor node powered by CR2032 coin cell, logging temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Supervisor monitors VDD for brownout and PFI for battery voltage decay; asserts RST to halt MCU before data corruption occurs. Use Value: 10µA supply current extends battery life beyond 5 years; 2.63V threshold aligns with LiMnO₂ discharge curve endpoint. |
Use Scenario: Embedded controller managing 3.3V and 5V rails in ultrabook platform, coordinating power sequencing and thermal shutdown. IC Role / Device Role / Timing Role: ISL88706IB826Z supervises 3.3V core rail while PFI monitors 5V standby; dual RST outputs drive separate reset domains. Use Value: Dual reset outputs eliminate level-shifting components; ±1.8% accuracy ensures deterministic reset timing across temperature. |
| DSP-Based Motor Controller | Industrial PLC I/O Module |
|
Use Scenario: Real-time motor control board using TI C2000 DSP, requiring guaranteed reset during AC line sags or capacitor discharge. IC Role / Device Role / Timing Role: ISL88706IB826Z provides POR, brownout reset, and watchdog supervision; WDI tied to DSP GPIO toggled in main loop. Use Value: 1.6s watchdog timeout matches DSP firmware execution cycle; reset valid down to 1V prevents lockup during undervoltage faults. |
Use Scenario: DIN-rail mounted PLC module with isolated 24V DC input, powering 3.3V logic and analog front-end. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail (VDD) and monitors 24V input via PFI resistor divider for early failure warning. Use Value: 1.25V PFI threshold enables monitoring of 24V rail down to ~12V using standard 10:1 divider; hysteresis prevents chatter near threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT26D3+ | Single active-low RST output; 2.63V threshold; no PFI/PFO or watchdog; 3µA supply current. | Lacks auxiliary voltage monitoring and watchdog - suitable only for basic reset-only use cases. | Select when minimal functionality and ultra-low current (<3µA) outweigh need for PFI or watchdog. |
| TPS3808G33DBVR | 2.63V threshold; active-low RST only; adjustable watchdog (0.5–10s); 16µA supply current at 3.3V. | Higher current draw and no active-high RST; requires external inverter for push-pull reset signaling. | Choose when programmable watchdog timeout is required and dual RST outputs are not needed. |
Compared with MAX6326UT26D3+ and TPS3808G33DBVR, the ISL88706IB826Z uniquely delivers dual RST outputs, integrated PFI/PFO monitoring, and 10µA current in a single SOIC-8 - enabling compact, feature-complete supervision without external components.
Availability
ISL88706IB826Z is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial PLC modules, and notebook system power management requiring stable component supply and long-lifecycle support.
Supply support for ISL88706IB826Z 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 Corporation (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management solutions, serving automotive, industrial, and infrastructure markets.
The ISL88706IB826Z belongs to Renesas' legacy Intersil microprocessor supervisor family, designed specifically for cost-sensitive, low-power embedded systems requiring robust voltage monitoring, watchdog safety, and dual-reset signaling.
FAQ
What is the exact reset voltage threshold for ISL88706IB826Z?
The ISL88706IB826Z has a factory-programmed VDD reset threshold of 2.63V, specified with ±1.8% accuracy over -40°C to +85°C. This value is confirmed in the Ordering Information table (Page 2) and Electrical Specifications (Page 5) of FN8092 Rev 6.00, where VTH1 min/typ/max = 2.583V/2.630V/2.677V at +25°C.
Does ISL88706IB826Z support both active-low and active-high reset outputs?
Yes, ISL88706IB826Z provides simultaneous RST (active-low, PMOS pull-up) and RST (active-high, push-pull) outputs. Pin 7 is RST and Pin 8 is RST, as shown in the Pinouts diagram (Page 2) and Pin Descriptions (Page 4) of FN8092 Rev 6.00 - distinguishing it from variants like ISL88705 that offer only one reset output.
Can ISL88706IB826Z monitor a secondary voltage such as a battery rail?
Yes, ISL88706IB826Z includes a dedicated PFI (Power-Fail Input) pin with a fixed 1.25V threshold and 20mV hysteresis. When used with an external resistor divider, it can monitor battery voltages down to ~1.25V or higher rails (e.g., 12V, 24V) - as demonstrated in Figure 2 (Page 7) and the ISL88705EVAL1 schematic (Page 13).
What is the watchdog timeout behavior of ISL88706IB826Z?
The ISL88706IB826Z features a nominal 1.6s watchdog timeout (tWDT), with min/typ/max = 1.0s/1.6s/2.0s. The WDI pin must be toggled within this period to clear the timer; failure results in WDO going low. Unlike RST, WDO has no minimum pulse width and returns high immediately when VDD rises above threshold (Page 6, Watchdog Timer section).
Is ISL88706IB826Z compatible with modern reflow soldering processes?
Yes, ISL88706IB826Z is supplied in an 8-lead SOIC package (M8.15 outline) with Pb-free (RoHS-compliant) terminations rated for standard reflow profiles. The datasheet confirms Pb-free SOIC packages meet IPC/JEDEC J-STD-020 moisture sensitivity and reflow requirements (Page 5, Thermal Information).
ISL88706IB826Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL88706IB826Z FAQ
1.How can I place an order for ISL88706IB826Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88706IB826Z 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 ISL88706IB826Z reliable?
The price and inventory of ISL88706IB826Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88706IB826Z is usually 5 days.
3.What payment methods are accepted for ISL88706IB826Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88706IB826Z transactions.
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4.How is shipping managed for ISL88706IB826Z?
ISL88706IB826Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88706IB826Z 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 ISL88706IB826Z?
For technical support, including ISL88706IB826Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88706IB826Z requirements.
6.How does Aetrix verify that ISL88706IB826Z is sourced from the original manufacturer or authorized distributors?
All ISL88706IB826Z 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 ISL88706IB826Z meets industry standards.
7.What is the process for return or replacement of ISL88706IB826Z?
All ISL88706IB826Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL88706IB826Z, 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 ISL88706IB826Z part is unused and in its original packaging.
Return procedure for ISL88706IB826Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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