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Renesas ISL88706IB826Z-TK
- Part No.:
- ISL88706IB826Z-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL88706IB826Z-TK.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,079
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Product details
Overview
ISL88706IB826Z-TK from Renesas (formerly Intersil) is a precision microprocessor supervisor IC designed for power-supply and battery voltage monitoring in embedded systems. It provides fixed 2.63V VDD reset threshold (±1.8% accuracy), active-low/high reset outputs, 1.6s watchdog timer, auxiliary 1.25V PFI monitor, and manual reset input - enabling reliable system initialization and brownout protection in portable and industrial equipment.
For engineers reviewing the ISL88706IB826Z-TK datasheet, ISL88706IB826Z-TK pinout, ISL88706IB826Z-TK application, or ISL88706IB826Z-TK equivalent, key selection considerations include its 2.63V trip point, dual RST/RST outputs, ultra-low 10µA supply current at 3V, immunity to power-supply transients, and SOIC-8 RoHS-compliant packaging.
Technical Context
The ISL88706IB826Z-TK integrates a precision bandgap reference, POR circuit with 200ms nominal timeout, hysteresis-enabled VDD supervision, and independent PFI/PFO monitoring path. Its watchdog timer clears on WDI edge transitions and asserts WDO low after ~1.6s timeout - supporting fail-safe microcontroller recovery without external components.
Unlike ISL88707/ISL88708 variants, ISL88706IB826Z-TK lacks CPOR pin and adjustable tPOR; it delivers fixed 140–260ms reset pulse width and operates across -40°C to +85°C with VDD range 2.0–5.5V. Reset remains valid down to VDD = 1V, and MR features internal 20kΩ pull-up with debounced active-low logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VTH1) | 2.63V ±1.8% - factory-trimmed trip point ensures accurate 2.6V rail supervision without external calibration. |
| Supply Current (IDD) | 10µA max at 3V - enables multi-year battery life in always-on monitoring applications. |
| Reset Pulse Width (tPOR) | 140–260ms - guarantees sufficient hold time for FPGA configuration or processor core stabilization. |
| Watchdog Timeout (tWDT) | 1.6s typical - balances responsiveness and noise immunity for MCU activity verification. |
| PFI Threshold | 1.25V ±50mV - supports low-battery warning or auxiliary supply monitoring via resistor divider. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded deployments including motor controls and instrumentation. |
| Reset Validity Range | VDD ≥ 1V - maintains functional reset assertion during deep brownout conditions before full power collapse. |
Pinout & Package
ISL88706IB826Z-TK uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, M8.15 outline), RoHS-compliant, with 1.27mm lead pitch and 5.00mm × 4.00mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Active-low debounced input with internal 20kΩ 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 or during power-up. |
| 3 GND | Ground Reference | System ground return for all internal comparators, reference, and output drivers. |
| 4 PFI | Power-Fail Input | Auxiliary voltage monitor input with 1.25V comparator; used for low-battery detection or secondary supply supervision. |
| 5 PFO | Power-Fail Output | Open-drain output high when PFI > 1.25V, low otherwise - enables early warning signaling without additional logic. |
| 6 WDI | Watchdog Input | Edge-sensitive input that clears internal 1.6s timer on rising/falling transitions; floating disables watchdog function. |
| 7 RST | Active-Low Reset Output | Push-pull output pulled low during reset; sinks 2.5mA at VDD ≥ 3.3V with VOL ≤ 0.4V. |
| 8 RST | Active-High Reset Output | Complementary push-pull output driven high to VDD during reset; sources 0.8mA with VOH ≥ VDD−0.6V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual RST/RST outputs | Simultaneous active-low and active-high reset signals eliminate need for external inverters in mixed-logic systems. |
| ±1.8% VDD threshold accuracy | Reduces margining requirements in 2.6V supply designs, enabling tighter system-level voltage tolerances. |
| 10µA max supply current at 3V | Minimizes quiescent load on coin-cell or energy-harvested power sources in always-on monitoring nodes. |
| Immunity to power-supply transients | Prevents false resets caused by switching noise or short-duration droops, improving field reliability. |
| Reset valid down to VDD = 1V | Ensures controlled shutdown sequencing even during severe brownout events prior to complete power loss. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and ECG patches require guaranteed startup integrity and low-power brownout detection. IC Role / Device Role / Timing Role: ISL88706IB826Z-TK monitors 2.6V LDO output and coin-cell voltage, asserting RST until stable, then maintaining watchdog supervision. Use Value: 10µA IDD extends single-CR2032 battery life beyond 5 years in sleep mode while ensuring deterministic reset under voltage sag. |
Use Scenario: DIN-rail mounted PLC modules operate in electrically noisy factory environments with fluctuating 24VDC supplies. IC Role / Device Role / Timing Role: ISL88706IB826Z-TK supervises local 2.6V logic rail and detects auxiliary 5V backplane voltage via PFI divider. Use Value: ±1.8% threshold accuracy and transient immunity prevent spurious resets during relay coil switching or motor drive transients. |
| Network Edge Routers | Smart Energy Meters |
|
Use Scenario: Fanless enterprise routers use DC-DC converters with tight 2.6V output tolerances and require fail-safe boot sequencing. IC Role / Device Role / Timing Role: ISL88706IB826Z-TK provides POR, VDD supervision, and WDI-driven watchdog for ARM-based control plane processors. Use Value: Dual RST/RST outputs interface natively with both legacy CPLD reset logic and modern SoC reset controllers without level-shifting. |
Use Scenario: ANSI C12.20-certified electricity meters must log power failures and maintain RTC integrity during AC line dropout. IC Role / Device Role / Timing Role: ISL88706IB826Z-TK monitors main 3.3V rail and supercapacitor backup via PFI, triggering PFO warning before VDD collapse. Use Value: 1.25V PFI threshold enables precise low-battery detection of backup capacitors, extending secure meter shutdown window by 200ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT26+T | 2.63V reset threshold, 3.5µA IDD, no PFI/PFO, no watchdog, SOT23-3 package | Lacks auxiliary monitoring and watchdog; suited only for basic POR-only use cases | Select when board space is critical and only VDD supervision is required - not suitable for ISL88706IB826Z-TK's dual-output or PFI functionality. |
| TPS3808G33DBVR | 3.3V threshold, 16µA IDD, no PFI, no dual RST, open-drain RST only, SOT23-6 | Higher threshold, no auxiliary monitor, no active-high reset - requires external pull-up and logic inversion | Choose for 3.3V systems needing lower cost; avoid where 2.63V accuracy, PFI warning, or complementary reset outputs are mandatory. |
Compared with MAX6326UT26+T and TPS3808G33DBVR, ISL88706IB826Z-TK uniquely delivers 2.63V precision supervision, dual RST outputs, integrated PFI/PFO monitoring, and watchdog capability in a single SOIC-8 footprint - eliminating discrete support components and reducing BOM count by up to 4 parts.
Availability
ISL88706IB826Z-TK is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and network edge routers requiring stable component supply with long-term industrial temperature support and RoHS compliance.
Supply support for ISL88706IB826Z-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 Corporation (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management solutions, serving automotive, industrial, and infrastructure markets with high-reliability silicon.
The ISL887xx family was designed specifically for cost-sensitive, low-power microprocessor supervision in battery-operated and industrial embedded systems - emphasizing precision thresholding, minimal quiescent current, and robust noise immunity.
FAQ
What is the exact reset threshold voltage for ISL88706IB826Z-TK?
The ISL88706IB826Z-TK has a factory-programmed VDD reset threshold of 2.63V, specified with ±1.8% accuracy over temperature (2.583V min to 2.677V max at +25°C). This value is laser-trimmed during production and documented in the FN8092 datasheet Electrical Specifications table under VTH1 for suffix "26".
Does ISL88706IB826Z-TK support adjustable power-on reset timeout?
No, ISL88706IB826Z-TK does not support adjustable tPOR. Unlike ISL88707/ISL88708 variants, it lacks the CPOR pin and delivers a fixed power-on reset timeout of 140–260ms. The nominal 200ms delay is internally generated and cannot be extended with external capacitance.
Can ISL88706IB826Z-TK monitor voltages other than VDD?
Yes, ISL88706IB826Z-TK includes a dedicated Power-Fail Input (PFI) pin with a 1.25V internal comparator threshold. By using an external resistor divider, users can monitor auxiliary voltages such as battery levels or secondary supplies - for example, scaling a 12V rail down to 1.25V for low-voltage warning via PFO.
What is the watchdog timer behavior when WDI is left unconnected?
When WDI is floating or connected to a high-impedance (tri-state) node, the watchdog timer in ISL88706IB826Z-TK is disabled. WDO will only go low during VDD brownout conditions (<2.63V), not due to timeout. To enable watchdog functionality, WDI must receive periodic edges from the host processor.
Is ISL88706IB826Z-TK pin-compatible with other ISL887xx variants?
ISL88706IB826Z-TK shares the same SOIC-8 pinout with ISL88705, ISL88707, ISL88708, ISL88716, and ISL88813, but functional differences exist: ISL88706 lacks CPOR (unlike ISL88707/ISL88708) and does not support window-detection configurations (unlike ISL88813). Pin compatibility enables layout reuse, but firmware and external circuitry must match the specific variant's feature set.
ISL88706IB826Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TK FAQ
1.How can I place an order for ISL88706IB826Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88706IB826Z-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 ISL88706IB826Z-TK reliable?
The price and inventory of ISL88706IB826Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88706IB826Z-TK is usually 5 days.
3.What payment methods are accepted for ISL88706IB826Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88706IB826Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88706IB826Z-TK?
ISL88706IB826Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88706IB826Z-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 ISL88706IB826Z-TK?
For technical support, including ISL88706IB826Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88706IB826Z-TK requirements.
6.How does Aetrix verify that ISL88706IB826Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL88706IB826Z-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 ISL88706IB826Z-TK meets industry standards.
7.What is the process for return or replacement of ISL88706IB826Z-TK?
All ISL88706IB826Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88706IB826Z-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 ISL88706IB826Z-TK part is unused and in its original packaging.
Return procedure for ISL88706IB826Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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