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Renesas ISL88706IB831Z-TK
- Part No.:
- ISL88706IB831Z-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL88706IB831Z-TK.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,840
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Product details
Overview
ISL88706IB831Z-TK from Renesas (formerly Intersil) is a microprocessor supervisor IC designed to monitor +3.09V supply rails in embedded systems. It provides power-on reset, brownout detection, active-low manual reset, 1.6s watchdog timer, and auxiliary 1.25V power-fail monitoring. It operates across –40°C to +85°C and draws ≤10µA at 3V, making it suitable for battery-powered industrial controllers.
For engineers reviewing the ISL88706IB831Z-TK datasheet, ISL88706IB831Z-TK pinout, ISL88706IB831Z-TK application, or ISL88706IB831Z-TK equivalent, key selection criteria include ±1.8% VDD threshold accuracy, dual RST/RST outputs, immunity to supply transients, reset validity down to VDD = 1V, and compatibility with SOIC-8 PCB layouts requiring RoHS-compliant, tape-and-reel delivery.
Technical Context
The ISL88706IB831Z-TK integrates a precision voltage comparator with 3.09V factory-trimmed threshold (VTH1), hysteresis of 37mV, and POR circuitry asserting reset for ≥140ms. Its auxiliary PFI input monitors external voltages ≥1.25V via resistor divider, driving PFO high when PFI exceeds threshold - enabling low-battery warning or secondary supply supervision.
It features an internal watchdog timer with 1.6s nominal timeout (1.0–2.0s range), cleared by WDI edge transitions. The MR input includes 20kΩ internal pull-up and debouncing; reset remains asserted for tPOR after VDD recovery or MR release. Unlike ISL88707/ISL88708, it lacks CPOR pin and adjustable POR delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.09V ±1.8% - ensures reliable reset assertion during 3.3V rail brownout without false triggers |
| Supply Current | ≤10µA at 3V - extends battery life in portable equipment with minimal quiescent load |
| Reset Pulse Width | ≥140ms - guarantees sufficient hold time for microcontroller initialization and FPGA configuration | Watchdog Timeout | 1.6s typical - provides robust software hang detection without excessive system latency |
| PFI Threshold | 1.25V ±50mV - enables accurate low-voltage monitoring of batteries or auxiliary supplies |
| Operating Temp | –40°C to +85°C - supports industrial-grade deployment in uncontrolled environments |
| Reset Validity | Down to VDD = 1V - maintains functional reset signaling during deep undervoltage conditions |
Pinout & Package
ISL88706IB831Z-TK is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15), RoHS-compliant and optimized for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Debounced input with 20kΩ internal pull-up; asserts reset when pulled below 0.8V for ≥550ns |
| 2 VDD | Main supply voltage input | Monitored against 3.09V threshold; reset asserted if VDD falls below trip point or during power-up |
| 3 GND | Ground reference | Common return path for all internal comparators and output drivers |
| 4 PFI | Auxiliary voltage monitor input | Compares external voltage (via resistor divider) to 1.25V reference; triggers PFO state change |
| 5 PFO | Power-fail output | Active-high open-drain output; goes high when PFI > 1.25V, used for low-battery warning |
| 6 WDO | Watchdog timer output | Active-low push-pull output; pulses low on watchdog timeout or VDD undervoltage |
| 7 RST | Active-low reset output | PMOS pull-up output; driven low during reset assertion with ≥140ms minimum pulse width |
| 8 RST | Active-high reset output | Push-pull output; driven high to VDD during reset; complements RST for mixed-logic interface needs |
Key Features
| Feature | Design Value |
|---|---|
| Dual RST/RST outputs | Supports both active-low and active-high reset signaling in same footprint, eliminating level-shifter need |
| ±1.8% VDD threshold accuracy | Reduces margining overhead in 3.3V systems, enabling tighter supply tolerance design |
| 1.25V PFI reference with hysteresis | Enables stable low-battery detection down to 1.25V without external reference IC |
| 10µA max supply current at 3V | Minimizes parasitic drain in always-on battery backup paths |
| Immunity to supply transients | Prevents spurious resets from switching noise or short-duration droops in shared power rails |
Applications
| Battery-Powered Data Logger | Industrial PLC I/O Module |
|---|---|
Use Scenario: Continuous environmental sensor logging powered by coin-cell or Li-ion battery with periodic wake-up. IC Role / Device Role / Timing Role: Supervisor monitors main 3.3V rail and battery voltage via PFI; asserts RST on brownout and drives PFO for low-battery alert. Use Value: Ensures clean MCU boot after power recovery and prevents corrupted flash writes during voltage collapse. | Use Scenario: DIN-rail mounted controller with isolated 24V-to-3.3V DC-DC supplying logic and field I/O. IC Role / Device Role / Timing Role: ISL88706IB831Z-TK supervises 3.3V logic rail and detects auxiliary 5V bias for analog front-end using PFI divider. Use Value: Dual reset outputs interface directly with FPGA (RST) and legacy microcontroller (RST), reducing BOM count. |
| Medical Point-of-Care Monitor | Network Edge Router Control Plane |
Use Scenario: Portable diagnostic device with dual power sources (AC adapter + internal battery) and safety-critical boot sequence. IC Role / Device Role / Timing Role: Monitors 3.3V system rail and uses PFI to detect AC adapter presence; WDO guards against firmware lockup. Use Value: Guarantees deterministic reset timing and watchdog coverage meeting IEC 62304 Class B requirements. | Use Scenario: Carrier-grade router with hot-swappable line cards requiring fail-safe control processor startup. IC Role / Device Role / Timing Role: Supervises 3.3V management ASIC supply; RST drives CPLD configuration enable; PFO signals auxiliary 12V rail status. Use Value: Eliminates need for discrete reset generator and power-fail comparator, saving 35mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT31D3+ | 3.08V threshold (±2.5%), 1.5µA IDD, no PFI/PFO, single RST output | Lacks auxiliary voltage monitoring and dual reset outputs; suited only for basic supply supervision | Select when PFI functionality is unnecessary and ultra-low current (<2µA) is critical |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), 16µA IDD, no watchdog, no PFI, single active-low RST | Higher threshold accuracy but missing watchdog and power-fail detection capabilities | Choose for high-precision 3.3V monitoring where watchdog and auxiliary monitoring are handled elsewhere |
Compared with MAX6326UT31D3+ and TPS3808G33DBVR, the ISL88706IB831Z-TK uniquely combines 3.09V precision supervision, integrated watchdog, and dual-supply monitoring in one SOIC-8 package - delivering full system-level reliability without external components.
Availability
ISL88706IB831Z-TK is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, battery-backed data loggers, and network infrastructure requiring stable component supply with guaranteed long-term sourcing.
Supply support for ISL88706IB831Z-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.
The ISL88706IB831Z-TK belongs to Renesas' legacy Intersil microprocessor supervisor family, engineered for cost-sensitive, space-constrained embedded systems requiring high-threshold accuracy, low power, and multi-function integration.
FAQ
What is the exact VDD reset threshold voltage for ISL88706IB831Z-TK?
The ISL88706IB831Z-TK has a factory-programmed VDD voltage trip point of 3.09V, with a guaranteed tolerance of ±1.8% (3.034V to 3.146V) over temperature and supply variations. This threshold is laser-trimmed during production and specified in the Electrical Specifications table on page 5 of FN8092 Rev 6.00.
Does ISL88706IB831Z-TK support adjustable power-on reset delay?
No, the ISL88706IB831Z-TK does not support adjustable POR delay. It provides a fixed nominal tPOR of 200ms (min 140ms, max 260ms). Adjustable delay via external capacitor on CPOR is exclusive to ISL88707 and ISL88708 variants - ISL88706IB831Z-TK lacks the CPOR pin entirely.
Can ISL88706IB831Z-TK monitor a 1.8V supply rail?
No, the ISL88706IB831Z-TK is factory-set to monitor 3.09V and cannot be reconfigured for 1.8V. Its VDD threshold is fixed and non-adjustable. For 1.8V supervision, consider ISL88706IB818Z (1.8V variant) or alternate supervisors like TPS3808G18.
What is the function of the PFI and PFO pins on ISL88706IB831Z-TK?
The PFI pin accepts an external voltage (e.g., from a resistor divider) and compares it to an internal 1.25V reference. When PFI exceeds 1.25V, the PFO pin - an active-high open-drain output - pulls high, signaling valid auxiliary supply or battery presence. This enables low-battery warning or secondary rail monitoring without additional ICs.
Is ISL88706IB831Z-TK pin-compatible with other members of the ISL887xx family?
Yes, ISL88706IB831Z-TK shares identical SOIC-8 pinout and footprint with ISL88705, ISL88707, ISL88708, ISL88716, and ISL88813. However, functional differences exist: ISL88706 lacks CPOR and has different VTH1; ISL88707/ISL88708 add CPOR; ISL88716/ISL88813 omit WDO/WDI. Always verify signal mapping per datasheet.
ISL88706IB831Z-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:
- 3.09V
- 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
ISL88706IB831Z-TK FAQ
1.How can I place an order for ISL88706IB831Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88706IB831Z-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 ISL88706IB831Z-TK reliable?
The price and inventory of ISL88706IB831Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88706IB831Z-TK is usually 5 days.
3.What payment methods are accepted for ISL88706IB831Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88706IB831Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88706IB831Z-TK?
ISL88706IB831Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88706IB831Z-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 ISL88706IB831Z-TK?
For technical support, including ISL88706IB831Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88706IB831Z-TK requirements.
6.How does Aetrix verify that ISL88706IB831Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL88706IB831Z-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 ISL88706IB831Z-TK meets industry standards.
7.What is the process for return or replacement of ISL88706IB831Z-TK?
All ISL88706IB831Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88706IB831Z-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 ISL88706IB831Z-TK part is unused and in its original packaging.
Return procedure for ISL88706IB831Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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