My Inquiry
My Account
Renesas ISL88813IB846Z-TK
- Part No.:
- ISL88813IB846Z-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL88813IB846Z-TK.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL88813IB846Z-TK from Renesas (formerly Intersil) is a microprocessor supervisor IC with dual reset outputs (RST active-low and RST active-high), 4.64V fixed VDD threshold, 1.25V auxiliary power-fail monitor (PFI/PFO), and integrated 1.6s watchdog timer. It asserts reset during power-up, brownout, or manual trigger, and supports operation down to VDD = 1V. Used in portable systems requiring reliable voltage supervision and low-power reset control.
For engineers reviewing the ISL88813IB846Z-TK datasheet, ISL88813IB846Z-TK pinout, ISL88813IB846Z-TK application, or ISL88813IB846Z-TK equivalent, key selection criteria include ±1.8% VTH accuracy, 10µA max supply current at 3V, dual-reset output configuration, PFI monitoring down to 1.25V, and SOIC-8 RoHS-compliant packaging for industrial temperature range (-40°C to +85°C).
Technical Context
The ISL88813IB846Z-TK implements independent voltage supervision on VDD and PFI inputs using precision bandgap references. Its POR circuit enforces a minimum 140ms reset pulse width (typ. 200ms) after VDD rises above 4.64V, with hysteresis (46mV) preventing chatter during transients. The device integrates a debounced MR input with 20kΩ internal pull-up and supports reset assertion down to VDD = 1V.
Unlike ISL88707/ISL88708, the ISL88813 does not feature CPOR pin or adjustable tPOR - its power-on reset timeout is fixed. It includes a 1.6s watchdog timer cleared by WDI edge transitions, with WDO pulled low on timeout or low-VDD conditions, while RST/RST outputs maintain guaranteed minimum pulse width.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.64V ±1.8% - ensures reliable reset assertion when main supply drops below nominal 5V rail |
| Supply Current | 10µA max at 3V - enables multi-year battery life in portable equipment |
| Reset Pulse Width | 140–260ms - guarantees sufficient hold time for processor initialization and FPGA configuration |
| PFI Threshold | 1.25V ±50mV - allows direct low-battery detection or external voltage monitoring via resistor divider |
| Watchdog Timeout | 1.0–2.0s typ. 1.6s - provides robust software hang detection without excessive system latency |
| Operating Temp | -40°C to +85°C - qualified for industrial embedded and computing applications |
| Package | 8-lead SOIC (M8.15) - surface-mount compatible with standard reflow profiles |
Pinout & Package
ISL88813IB846Z-TK is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA compliant, M8.15 outline), RoHS-compliant and optimized for automated assembly.
| 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 ≤0.8V |
| 2 VDD | Power Supply Input | Main supply rail (2.0–5.5V); monitored against 4.64V threshold with 46mV hysteresis |
| 3 GND | Ground Reference | System ground return for all internal comparators and outputs |
| 4 PFI | Power-Fail Input | Auxiliary voltage monitor input; compares against 1.25V reference for low-battery or secondary supply warning |
| 5 PFO | Power-Fail Output | Active-high open-drain output; goes high when PFI > 1.25V, low otherwise |
| 6 WDI | Watchdog Input | Edge-sensitive input; toggling within 1.6s clears internal timer; floating or high-Z disables watchdog |
| 7 RST | Active-Low Reset Output | Push-pull output; driven low during reset; pulls to GND with 2.5mA sink capability at VDD ≥3.3V |
| 8 RST | Active-High Reset Output | Push-pull output; driven high to VDD during reset; sources 0.8mA at VDD ≥3.3V |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary reset outputs | RST (active-low) and RST (active-high) enable direct interface with both logic families and legacy microcontrollers requiring either polarity |
| Ultra-low quiescent current | 10µA max at 3V reduces standby power in battery-backed systems and extends operational lifetime |
| Immunity to supply transients | Hysteresis (46mV) and internal filtering prevent false resets caused by brief voltage droops or noise spikes |
| Guaranteed reset validity down to 1V | Ensures functional reset assertion even during deep brownout or battery depletion scenarios |
| Integrated watchdog timer | 1.6s timeout with edge-triggered WDI eliminates need for external timing components and simplifies firmware watchdog management |
Applications
| Portable Medical Devices | Notebook Power Management |
|---|---|
Use Scenario: Battery-powered glucose meters and handheld diagnostic tools requiring fail-safe startup and low-voltage shutdown. IC Role / Device Role / Timing Role: Monitors main 3.3V/5V rail and battery voltage via PFI; asserts dual RST signals to halt MCU execution before brownout corruption. Use Value: Prevents data loss during battery depletion using 1.25V PFI threshold and reset assertion down to VDD = 1V. | Use Scenario: Embedded controller subsystems managing AC/DC adapter handover, thermal throttling, and sleep-state sequencing. IC Role / Device Role / Timing Role: Supervises 5V standby rail and monitors 3.3V core supply; uses WDI to detect firmware hangs during S3/S4 transitions. Use Value: Dual RST outputs simplify integration with Intel PCH and AMD FCH reset requirements without level-shifting. |
| Industrial PLC I/O Modules | Communications Baseband Processors |
Use Scenario: DIN-rail mounted programmable logic controllers where EMI resilience and long-term reliability are critical. IC Role / Device Role / Timing Role: Provides POR and brownout protection for ARM Cortex-M7 host MCU; PFO signals auxiliary 24V field bus status to FPGA. Use Value: ±1.8% VTH accuracy and transient immunity ensure deterministic reset behavior in electrically noisy factory environments. | Use Scenario: LTE/5G small cell baseband units with multi-rail power domains and strict boot sequence timing. IC Role / Device Role / Timing Role: Supervises 1.8V DSP core and 3.3V I/O rails; uses MR for hardware-initiated recovery after RF front-end fault detection. Use Value: 200ms tPOR aligns with FPGA configuration time, while 10µA IDD minimizes impact on always-on control domain power budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US46D3+T | Single active-low RST output; no RST; 4.63V threshold; 1.25V PFI; 1.6s watchdog; 12µA IDD | Lacks complementary reset output; requires external inverter for active-high reset path | Select when board space is constrained and only one reset polarity is needed |
| TPS3808G33DBVR | Single active-low RST; 3.3V threshold; no PFI/PFO; no watchdog; 4µA IDD; adjustable delay via capacitor | No auxiliary voltage monitor or watchdog functionality; fixed 3.3V supervision only | Select for simple 3.3V-only systems where ultra-low current dominates over feature set |
Compared with MAX6326US46D3+T and TPS3808G33DBVR, the ISL88813IB846Z-TK uniquely delivers dual-polarity reset outputs and integrated PFI/PFO monitoring in a single SOIC-8 package - enabling compact, feature-complete supervision without external logic or additional ICs.
Availability
ISL88813IB846Z-TK is available at Aetrix Electronics and suitable for portable medical devices, notebook power management, industrial PLC I/O modules, and communications baseband processors requiring stable component supply across extended product lifecycles.
Supply support for ISL88813IB846Z-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 ISL88813IB846Z-TK belongs to Renesas' legacy Intersil microprocessor supervisor family, designed specifically for cost-sensitive, low-power embedded systems needing precise voltage monitoring, dual-reset signaling, and watchdog safety features.
FAQ
What is the exact reset threshold voltage of the ISL88813IB846Z-TK?
The ISL88813IB846Z-TK has a factory-programmed VDD voltage trip point of 4.64V, with a tolerance of ±1.8% (4.556V to 4.724V) over temperature. This threshold is laser-trimmed during production and specified in the part marking "I46Z". The device also includes 46mV of hysteresis to prevent oscillation near the trip point.
Does the ISL88813IB846Z-TK support adjustable power-on reset timeout?
No, the ISL88813IB846Z-TK does not support adjustable tPOR. Unlike ISL88707/ISL88708 variants, it lacks a CPOR pin. Its power-on reset timeout is fixed at 140–260ms (typ. 200ms) and cannot be extended with an external capacitor. This is confirmed in the Functional Block Diagram and Pin Descriptions sections of FN8092 Rev 6.00.
Can the ISL88813IB846Z-TK monitor voltages lower than 1.25V on the PFI pin?
No, the ISL88813IB846Z-TK's PFI input threshold is fixed at 1.25V (±50mV). It cannot directly monitor voltages below this level. However, external resistor dividers can scale higher voltages down to meet the 1.25V reference - for example, a 12V rail monitored via 10:1 divider yields 1.2V at PFI, triggering PFO low. Voltages <1.25V applied directly to PFI will keep PFO low continuously.
What is the maximum supply voltage the ISL88813IB846Z-TK can tolerate?
The ISL88813IB846Z-TK has an absolute maximum VDD rating of +7V, but its recommended operating range is 2.0V to 5.5V. Operation above 5.5V risks permanent damage or parametric shift, and is outside qualification limits. The device is intended for 3.3V and 5V systems - not 12V or higher rails - and must be powered within its specified range to guarantee reset accuracy and watchdog timing.
How does the watchdog timer in the ISL88813IB846Z-TK interact with the reset outputs?
The ISL88813IB846Z-TK's watchdog timer does not directly assert RST or RST. Its WDO output goes low on timeout or low-VDD conditions, but reset outputs remain inactive unless WDO is externally connected to MR. This design allows flexible system-level watchdog policy: WDO may drive an LED indicator, interrupt line, or - via MR connection - trigger full system reset. The datasheet explicitly states "a watchdog time-out will not trigger a reset unless WDO is connected to MR".
ISL88813IB846Z-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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL88813IB846Z-TK FAQ
1.How can I place an order for ISL88813IB846Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88813IB846Z-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 ISL88813IB846Z-TK reliable?
The price and inventory of ISL88813IB846Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88813IB846Z-TK is usually 5 days.
3.What payment methods are accepted for ISL88813IB846Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88813IB846Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88813IB846Z-TK?
ISL88813IB846Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88813IB846Z-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 ISL88813IB846Z-TK?
For technical support, including ISL88813IB846Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88813IB846Z-TK requirements.
6.How does Aetrix verify that ISL88813IB846Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL88813IB846Z-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 ISL88813IB846Z-TK meets industry standards.
7.What is the process for return or replacement of ISL88813IB846Z-TK?
All ISL88813IB846Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88813IB846Z-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 ISL88813IB846Z-TK part is unused and in its original packaging.
Return procedure for ISL88813IB846Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL88813IB846Z-TK 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…
