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Renesas ISL88813IP846Z
- Part No.:
- ISL88813IP846Z
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ISL88813IP846Z.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,501
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Product details
Overview
ISL88813IP846Z from Intersil is a microprocessor supervisor IC designed for power-supply and battery voltage monitoring in embedded systems. It provides fixed 4.64V VDD threshold supervision, 1.25V auxiliary PFI monitoring, 1.6s watchdog timer, active-low/high reset outputs (RST/RST), and manual reset input - all with ±1.8% voltage accuracy and 10µA max supply current at 3V. Used in portable equipment and industrial controllers requiring reliable brownout and power-fail detection.
For engineers reviewing the ISL88813IP846Z datasheet, ISL88813IP846Z pinout, ISL88813IP846Z application, or ISL88813IP846Z equivalent, key selection considerations include its dual-reset output capability, immunity to power-supply transients, reset assertion down to VDD = 1V, and compatibility with PDIP-8 packaging for through-hole wave-solder assembly.
Technical Context
The ISL88813IP846Z integrates a precision bandgap reference, POR circuit with 200ms nominal timeout, hysteresis-enabled VDD threshold comparator (VTH1 = 4.64V ±1.8%), and independent 1.25V PFI comparator with 20mV hysteresis. Its watchdog timer monitors WDI toggling every 1.6s (typ) and asserts WDO low on timeout - but does not trigger RST unless WDO is externally connected to MR.
Unlike ISL88707/ISL88708, this variant lacks CPOR pin and adjustable tPOR; it shares identical pinout and functional block diagram with ISL88716. Reset remains asserted for ≥140ms after VDD recovery, and RST/RST outputs are fully complementary with PMOS pull-up (RST) and push-pull (RST).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.64V ±1.8% - ensures reliable reset assertion during 5V rail brownout without false triggering near nominal voltage. |
| PFI Threshold | 1.25V ±5% - enables low-battery warning or auxiliary supply monitoring via external resistor divider. |
| Watchdog Timeout | 1.6s typical - provides sufficient margin for firmware watchdog service intervals in microcontroller applications. |
| Supply Current | 10µA max at 3V - supports multi-year battery life in portable instrumentation and sensor nodes. |
| Reset Pulse Width | ≥140ms - guarantees processor core and peripheral initialization completes before release. |
| Operating Temp | -40°C to +85°C - validated for industrial-grade operation in uncontrolled ambient environments. |
| VDD Range | 2.0V to 5.5V - accommodates wide-input LDOs and battery discharge curves down to 2V. |
Pinout & Package
ISL88813IP846Z uses an 8-lead PDIP package (RoHS-compliant, MDP0031 outline), intended for through-hole wave soldering only - not reflow compatible. Lead pitch is 0.100", body width 0.310", and total length 0.375".
| 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 4.64V threshold; reset asserted if VDD falls below trip point or during power-up. |
| 3 GND | Ground Reference | Common return path for all internal comparators, watchdog, and output drivers. |
| 4 PFI | Power-Fail Input | Auxiliary voltage monitor input referenced to 1.25V; used for low-battery warning or secondary supply detection. |
| 5 PFO | Power-Fail Output | Open-drain output that goes high when PFI > 1.25V; can drive MR for automatic reset on power failure. |
| 6 WDI | Watchdog Input | Edge-sensitive input that clears 1.6s timer on rising/falling transition; floating disables watchdog function. |
| 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 with VOH ≥VDD–0.6V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary reset outputs | RST (active-low) and RST (active-high) enable direct interface with both legacy and modern logic families without level-shifting. |
| Ultra-low quiescent current | 10µA max at 3V allows integration into always-on battery-backed subsystems without significant runtime impact. |
| Immunity to supply transients | Hysteresis (46mV at 4.64V) and internal filtering prevent false resets caused by brief voltage dips or EMI-induced noise. |
| Reset validity down to 1V VDD | Ensures controlled shutdown sequence even during deep brownout conditions where other supervisors lose functionality. |
| 1.25V PFI threshold with adjustability | Supports custom voltage monitoring of supplies >1.25V using external resistor dividers - e.g., 12V rail monitoring with ~10:1 ratio. |
Applications
| Battery-Powered Instrumentation | Industrial PLC I/O Module |
|---|---|
Use Scenario: Handheld multimeter with lithium coin-cell backup and real-time clock. IC Role / Device Role / Timing Role: Supervisor monitors main 3.3V rail and coin-cell voltage via PFI to trigger graceful shutdown before data loss. Use Value: 10µA supply current extends battery life beyond 5 years; reset assertion at VDD = 1V prevents corrupted EEPROM writes during final discharge. | Use Scenario: DIN-rail mounted digital input module with isolated 24V DC supply. IC Role / Device Role / Timing Role: ISL88813IP846Z supervises 5V logic rail and detects 24V field supply dropout via PFI divider. Use Value: Dual RST/RST outputs directly drive FPGA configuration reset and microcontroller nRESET pins; PFO-to-MR connection enables automatic recovery on field supply restoration. |
| Notebook Embedded Controller | Medical Vital Signs Monitor |
Use Scenario: EC firmware managing keyboard, thermal, and battery charging in ultra-thin laptop. IC Role / Device Role / Timing Role: Provides POR, brownout reset, and watchdog supervision for EC MCU with no external timing components. Use Value: ±1.8% VDD threshold accuracy eliminates need for calibration; 1.6s watchdog interval aligns with EC firmware task scheduling granularity. | Use Scenario: Portable ECG device with rechargeable Li-ion battery and analog front-end. IC Role / Device Role / Timing Role: Monitors 3.3V analog supply and battery voltage via PFI to initiate low-power mode before shutdown. Use Value: Immunity to switching noise from DC-DC converters prevents spurious resets during signal acquisition; RST output drives analog ASIC reset pin directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL88813IB846Z | SOIC-8 package (M8.15); same electrical specs, temperature range, and pinout as ISL88813IP846Z. | Surface-mount assembly; requires reflow-compatible PCB layout and stencil design. | Select for new designs targeting automated SMT production and higher board density. |
| MAX6326US46D3+ | 4.63V threshold, 1.6s watchdog, single active-low reset output; 1.2µA supply current at 3V. | Lacks PFI/PFO and active-high RST; optimized for lowest power, not dual-output flexibility. | Choose when ultra-low current dominates over auxiliary monitoring or dual-reset interface requirements. |
Compared with ISL88813IB846Z, the ISL88813IP846Z offers identical supervision functionality in through-hole PDIP-8 for legacy or repair-focused builds, while MAX6326US46D3+ trades PFI capability and dual reset for lower power - making it suitable only where those features are unused.
Availability
ISL88813IP846Z is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, and notebook embedded controller designs requiring stable component supply and long-term obsolescence management.
Supply support for ISL88813IP846Z 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
Intersil Corporation is a provider of precision analog and power management ICs, acquired by Renesas Electronics in 2017. Its products target industrial, infrastructure, and high-reliability embedded markets.
The ISL88813IP846Z belongs to Intersil's microprocessor supervisor family, engineered for robust voltage monitoring and system-level reliability in cost-sensitive, space-constrained applications where accurate brownout detection and watchdog safety are critical.
FAQ
What is the exact voltage threshold and accuracy of the ISL88813IP846Z?
The ISL88813IP846Z has a factory-programmed VDD voltage trip point of 4.64V with ±1.8% accuracy over -40°C to +85°C. This is confirmed in the Electrical Specifications table (VTH1 = 4.556V min / 4.640V typ / 4.724V max). The part marking "I46Z" on the device body also denotes the 4.64V threshold.
Does the ISL88813IP846Z support adjustable power-on reset delay?
No, the ISL88813IP846Z does not support adjustable tPOR. Unlike ISL88707/ISL88708 which feature a CPOR pin, the ISL88813IP846Z has fixed 200ms nominal POR timeout (140–260ms min/max). Its pinout omits CPOR and instead includes WDI and dual RST outputs, per the Functional Block Diagram and Pin Descriptions.
Can the ISL88813IP846Z monitor voltages other than VDD?
Yes, the ISL88813IP846Z includes a dedicated Power-Fail Input (PFI) pin with a 1.25V threshold, enabling monitoring of auxiliary supplies such as battery voltage or secondary rails. Using an external resistor divider, voltages above 1.25V - e.g., 12V or 24V - can be scaled down to the PFI input, with PFO providing corresponding high/low status.
What is the recommended replacement for the discontinued ISL88813IP846Z?
The official recommended replacement is ISL88813IB846Z, a functionally identical part in SOIC-8 package (M8.15). Per the Ordering Information table in FN8092 Rev 6.00, ISL88813IB846Z shares the same 4.64V threshold, -40°C to +85°C rating, and full feature set - differing only in package type and assembly method.
Is the ISL88813IP846Z RoHS compliant and lead-free?
Yes, the ISL88813IP846Z is Pb-free and RoHS compliant, as explicitly stated in the Ordering Information table and Features list. Its PDIP package uses 100% matte tin plate (e3 termination finish) and is qualified for through-hole wave solder processing - though not for reflow soldering.
ISL88813IP846Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.64V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ISL88813IP846Z FAQ
1.How can I place an order for ISL88813IP846Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88813IP846Z 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 ISL88813IP846Z reliable?
The price and inventory of ISL88813IP846Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88813IP846Z is usually 5 days.
3.What payment methods are accepted for ISL88813IP846Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88813IP846Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88813IP846Z?
ISL88813IP846Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88813IP846Z 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 ISL88813IP846Z?
For technical support, including ISL88813IP846Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88813IP846Z requirements.
6.How does Aetrix verify that ISL88813IP846Z is sourced from the original manufacturer or authorized distributors?
All ISL88813IP846Z 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 ISL88813IP846Z meets industry standards.
7.What is the process for return or replacement of ISL88813IP846Z?
All ISL88813IP846Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL88813IP846Z, 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 ISL88813IP846Z part is unused and in its original packaging.
Return procedure for ISL88813IP846Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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