My Inquiry
My Account
Renesas ISL88706IB829Z
- Part No.:
- ISL88706IB829Z
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL88706IB829Z.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:100
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL88706IB829Z from Renesas (formerly Intersil) is a microprocessor supervisor IC with fixed 2.92V VDD reset threshold, active-low/high reset outputs, watchdog timer (1.6s timeout), power-fail monitor (1.25V PFI threshold), and manual reset input. It operates from 2.0V to 5.5V supply and draws ≤10µA at 3V, enabling reliable power-up, brownout, and low-battery detection in battery-powered embedded systems.
For engineers reviewing the ISL88706IB829Z datasheet, ISL88706IB829Z pinout, ISL88706IB829Z application, or ISL88706IB829Z equivalent, this page delivers verified specifications, SOIC-8 package details, functional context for reset timing and voltage supervision, and validated alternative parts for industrial and portable system design.
Technical Context
The ISL88706IB829Z integrates a precision voltage comparator with ±1.8% threshold accuracy, hysteresis (29mV at 2.92V), and immunity to power-supply transients. Its POR circuit asserts reset for 140–260ms after VDD rises above 2.92V, with reset remaining valid down to VDD = 1V.
It features dual reset outputs (RST active-low open-drain, RST active-high push-pull), a debounced MR input with 20kΩ internal pull-up, and a 1.6s watchdog timer cleared by WDI edge transitions. The PFI/PFO pair monitors auxiliary voltages ≥1.25V with 20mV hysteresis, supporting low-battery warning and presence detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VTH1) | 2.92V ±1.8% - factory-trimmed trip point ensures accurate 2.92V supply monitoring with 29mV hysteresis to prevent chatter during brownout recovery. |
| Supply Current (IDD) | ≤10µA at 3V - ultra-low quiescent current extends battery life in portable equipment without compromising supervision reliability. |
| Reset Pulse Width (tPOR) | 140–260ms - guaranteed minimum 140ms reset assertion time ensures sufficient processor initialization before release. |
| Watchdog Timeout (tWDT) | 1.0–2.0s (typ. 1.6s) - configurable window for detecting microprocessor lockup; cleared on WDI rising/falling edges. |
| PFI Threshold | 1.25V ±0.05V - fixed internal reference enables direct low-voltage monitoring or adjustable via external resistor divider for custom thresholds. |
| Operating Temp Range | −40°C to +85°C - industrial-grade thermal performance suitable for embedded controllers and communications hardware. |
| Reset Validity | Down to VDD = 1V - maintains asserted reset state even during deep undervoltage conditions, preventing erratic MCU behavior. |
Pinout & Package
ISL88706IB829Z is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, RoHS-compliant, M8.15 drawing), 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; internally pulled up to VDD via 20kΩ; triggers reset when pulled below 0.8V for ≥550ns. |
| 2 VDD | Power Supply Input | Main supply rail monitored against 2.92V threshold; reset asserted if VDD falls below trip point or during power-up. |
| 3 GND | Ground Reference | System ground return for all internal comparators, timers, and output drivers. |
| 4 PFI | Power-Fail Input | Auxiliary voltage monitor input; compared to 1.25V internal reference to detect low-battery or power-fail conditions. |
| 5 PFO | Power-Fail Output | Active-high open-drain output; goes high when PFI > 1.25V, low otherwise; supports warning signaling or MR-driven reset. |
| 6 WDI | Watchdog Input | Edge-sensitive input; toggling within 1.6s clears watchdog timer; floating or high-Z disables watchdog function. |
| 7 RST | Active-Low Reset Output | Open-drain output with internal PMOS pull-up; pulled 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 |
|---|---|
| Fixed 2.92V VDD threshold | Factory-trimmed ±1.8% accuracy eliminates external resistor networks and reduces BOM count in 3.0V/3.3V systems. |
| Dual RST/RST outputs | Simultaneous active-low and active-high reset signals simplify interface with diverse logic families (TTL, CMOS, FPGA I/O banks). |
| 1.25V PFI reference with hysteresis | Enables robust low-battery detection down to 1.25V or custom thresholds via resistor divider-no external reference required. |
| 1.6s watchdog timer | Self-contained timing block detects firmware hangs without external RC components; cleared by any WDI edge transition. |
| Reset validity to 1V VDD | Ensures clean reset assertion through deep brownout events, preventing partial MCU operation and data corruption. |
| Ultra-low 10µA supply current | Minimizes standby power draw in always-on battery-backed systems such as smart meters and IoT edge nodes. |
Applications
| Battery-Powered Portable Equipment | Notebook/Desktop Power Management |
|---|---|
|
Use Scenario: Monitoring main Li-ion battery voltage and detecting early discharge to trigger sleep mode or shutdown. IC Role / Device Role / Timing Role: Primary VDD supervisor with 2.92V threshold and auxiliary PFI monitoring of battery cell voltage via resistor divider. Use Value: Prevents data loss and system crash by asserting reset before battery drops below safe operating voltage for the host MCU. |
Use Scenario: Ensuring stable boot sequence and detecting 3.3V/5V rail faults in motherboard power delivery subsystems. IC Role / Device Role / Timing Role: Dual-rail supervisor using VDD for 3.3V monitoring and PFI for 5V or +12V auxiliary rail detection. Use Value: Guarantees CPU and chipset remain held in reset until all critical rails are within tolerance and stable for ≥200ms. |
| Industrial Microcontroller Systems | Communications Equipment |
|
Use Scenario: Providing fail-safe reset and watchdog supervision for PLC controllers operating in harsh EMI environments. IC Role / Device Role / Timing Role: Core system supervisor with MR for field-service reset, WDI for firmware health check, and noise-immune VDD sensing. Use Value: Eliminates need for discrete RC reset circuits while maintaining immunity to power transients per IEC 61000-4-4. |
Use Scenario: Detecting AC power loss and initiating graceful shutdown or backup power switchover in VoIP gateways and base stations. IC Role / Device Role / Timing Role: PFI used for mains-derived DC detection; PFO drives MR to force controlled reboot upon AC dropout. Use Value: Enables deterministic response to grid failure with <200ms reset assertion, preserving call state and configuration memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+ | 2.93V reset threshold, 3.5µA max IDD, no PFI/PFO, single RST output, no watchdog timer. | Lacks auxiliary voltage monitoring and watchdog functionality; suited only for basic reset-only use cases. | Select when only precise VDD supervision is needed and auxiliary monitoring or watchdog is handled elsewhere. |
| TPS3808G33DBVR | 3.3V reset threshold, 16µA max IDD, adjustable delay, no PFI/PFO, no dual RST outputs, no watchdog timer. | Higher threshold and no auxiliary monitoring limit use to 3.3V-only systems without battery warning capability. | Choose for cost-sensitive 3.3V applications where extended POR delay is preferred over dual reset polarity or PFI. |
Compared with MAX6326US29D3+ and TPS3808G33DBVR, ISL88706IB829Z uniquely combines 2.92V precision supervision, dual-polarity reset outputs, integrated watchdog, and 1.25V PFI monitoring in a single SOIC-8 package-enabling compact, feature-complete supervision without external components.
Availability
ISL88706IB829Z is available at Aetrix Electronics and suitable for portable/battery-powered equipment, notebook/desktop computer systems, and industrial microcontroller systems requiring stable component supply and long-term lifecycle support.
Supply support for ISL88706IB829Z 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 industrial, automotive, and infrastructure markets.
The ISL88706IB829Z belongs to Renesas' legacy Intersil microprocessor supervisor family, designed specifically for high-accuracy, low-power voltage monitoring and system-level fault detection in resource-constrained embedded platforms.
FAQ
What is the exact reset voltage threshold for ISL88706IB829Z?
The ISL88706IB829Z has a factory-programmed VDD reset threshold of 2.92V, with guaranteed accuracy of ±1.8% (2.867V to 2.973V) across temperature and supply conditions. This value is encoded in the part marking "I29Z" and confirmed in the Electrical Specifications table on page 5 of FN8092 Rev 6.00.
Does ISL88706IB829Z support both active-low and active-high reset outputs?
Yes, ISL88706IB829Z provides two independent reset outputs: pin 7 (RST) is active-low open-drain with internal PMOS pull-up, and pin 8 (RST) is active-high push-pull. Both assert simultaneously during power-up, brownout, or manual reset, enabling flexible interfacing with mixed-logic systems.
Can the watchdog timer on ISL88706IB829Z be disabled?
Yes, the watchdog timer is automatically disabled when the WDI pin (pin 6) is left floating or connected to a high-impedance (tri-state) source. No configuration register or external signal is required-watchdog operation resumes only when WDI receives valid edge transitions within the 1.6s timeout window.
What is the function of the PFI and PFO pins on ISL88706IB829Z?
PFI (pin 4) is an auxiliary voltage input compared to a 1.25V internal reference; PFO (pin 5) is its corresponding active-high open-drain output. When PFI voltage exceeds 1.25V, PFO goes high-enabling low-battery warning, power-fail detection, or presence sensing without external components.
Is ISL88706IB829Z compatible with reflow soldering processes?
Yes, ISL88706IB829Z uses a Pb-free SOIC-8 package (M8.15 drawing) qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Its thermal resistance θJA is 110°C/W on a 4-layer board, and it meets IPC/JEDEC reflow peak temperature requirements for RoHS-compliant assembly.
ISL88706IB829Z 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:
- 2.92V
- 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
ISL88706IB829Z FAQ
1.How can I place an order for ISL88706IB829Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88706IB829Z 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 ISL88706IB829Z reliable?
The price and inventory of ISL88706IB829Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88706IB829Z is usually 5 days.
3.What payment methods are accepted for ISL88706IB829Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88706IB829Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88706IB829Z?
ISL88706IB829Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88706IB829Z 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 ISL88706IB829Z?
For technical support, including ISL88706IB829Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88706IB829Z requirements.
6.How does Aetrix verify that ISL88706IB829Z is sourced from the original manufacturer or authorized distributors?
All ISL88706IB829Z 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 ISL88706IB829Z meets industry standards.
7.What is the process for return or replacement of ISL88706IB829Z?
All ISL88706IB829Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL88706IB829Z, 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 ISL88706IB829Z part is unused and in its original packaging.
Return procedure for ISL88706IB829Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL88706IB829Z Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
