My Inquiry
My Account
Renesas ISL88707IB846Z
- Part No.:
- ISL88707IB846Z
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL88707IB846Z.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,919
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL88707IB846Z from Renesas (formerly Intersil) is a microprocessor supervisor IC with dual active-high/active-low reset outputs, 4.64V fixed VDD threshold, adjustable power-on reset delay via CPOR pin, auxiliary 1.25V PFI monitor, and 1.6s watchdog timer. It operates from 2.0V to 5.5V supply, draws ≤10µA at 3V, and supports industrial temperature range (–40°C to +85°C). Used in portable systems for reliable power-up sequencing and brownout protection.
For engineers reviewing the ISL88707IB846Z datasheet, ISL88707IB846Z pinout, ISL88707IB846Z application, or ISL88707IB846Z equivalent, key selection criteria include its ±1.8% voltage threshold accuracy, reset pulse width customization capability, dual RST/RST outputs, immunity to power-supply transients, and compatibility with battery-backed or low-power embedded designs requiring precise voltage supervision.
Technical Context
The ISL88707IB846Z integrates a precision bandgap reference, POR circuit with 200ms nominal tPOR (adjustable via external capacitor on CPOR), independent watchdog timer with 1.6s timeout, and dual-threshold monitoring: primary VDD sensing at 4.64V (±1.8%) and auxiliary PFI input with 1.25V threshold. Its internal hysteresis prevents chatter during voltage transitions.
It features debounced manual reset (MR) with 20kΩ internal pull-up, active-low WDO output that asserts immediately on VDD undervoltage (no minimum pulse width), and complementary push-pull RST and open-drain RST outputs. The device remains functional down to VDD = 1V and supports reset assertion during power-up, power-down, and brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.64V ±1.8% - ensures reliable reset assertion when main supply drops below stable operating level for 5V systems. |
| Supply Current | ≤10µA at 3V - enables long battery life in portable equipment without compromising supervision integrity. |
| POR Delay (tPOR) | 200ms nominal, adjustable via CPOR capacitor - allows system-level timing coordination for FPGA configuration or oscillator stabilization. |
| Watchdog Timeout | 1.6s typical - provides robust software hang detection without excessive CPU overhead or false triggers. |
| PFI Threshold | 1.25V ±5mV - supports accurate low-battery warning or auxiliary rail monitoring using external resistor divider. |
| Reset Pulse Width | ≥140ms - guarantees sufficient duration to fully reset microcontroller peripherals and memory subsystems. |
| Operating Temp | –40°C to +85°C - validated for industrial-grade reliability in harsh ambient environments. |
Pinout & Package
ISL88707IB846Z is housed in an 8-lead SOIC package (JEDEC MS-012-AA compliant, RoHS-compliant, M8.15 outline), with 1.27mm lead pitch and 4.9mm × 3.9mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Active-low debounced input; internally pulled up to VDD (20kΩ); triggers reset when pulled below 0.8V for ≥550ns. |
| 2 VDD | Main Power Supply | Monitored supply rail; reset asserted if VDD falls below 4.64V; device functional down to 1V. |
| 3 GND | Ground Reference | Common return path for all internal circuits and output drivers. |
| 4 PFI | Auxiliary Voltage Input | Monitors external voltage (e.g., battery or secondary rail); comparator threshold = 1.25V; supports resistor-divider scaling. |
| 5 RST | Active-High Reset Output | Push-pull output; driven high to VDD during reset; releases when VDD > 4.64V + hysteresis and tPOR expires. |
| 6 CPOR | Adjustable POR Timing Input | Connect external capacitor to GND to extend tPOR beyond 200ms (e.g., 50pF → ~1.4s); layout-sensitive node. |
| 7 PFO | Power-Fail Output | Open-drain output; goes low when PFI < 1.25V; used for early warning or presence detection. |
| 8 RST | Active-Low Reset Output | Open-drain output with internal PMOS pull-up; pulled low to GND during reset; complements RST for mixed-logic systems. |
Key Features
| Feature | Design Value |
|---|---|
| Dual RST/RST outputs | Enables direct interface with both active-high and active-low reset domains without external logic inversion. |
| Adjustable tPOR via CPOR | Eliminates need for external RC timing networks; supports flexible system boot timing from 200ms to seconds. |
| 1.25V PFI threshold with hysteresis | Provides stable low-battery detection or auxiliary rail monitoring with 20mV hysteresis to prevent oscillation near threshold. |
| 1.6s watchdog timer | Independent of VDD monitoring; clears on WDI edge or MR assertion; avoids false timeouts during brief software stalls. |
| Ultra-low 10µA supply current | Minimizes quiescent drain in always-on battery backup paths, extending shelf life and runtime. |
Applications
| Portable Battery-Powered Equipment | Notebook/Desktop Computer Systems |
|---|---|
Use Scenario: Monitoring main 5V rail and Li-ion battery voltage in handheld medical devices or barcode scanners. IC Role / Device Role / Timing Role: Primary supervisor asserting RST during brownout and PFO during low-battery condition; CPOR extends tPOR to accommodate slow-charging battery startup. Use Value: Prevents corrupted firmware execution during marginal battery voltage and enables graceful shutdown before deep discharge. | Use Scenario: Ensuring clean power-up sequence for CPU, chipset, and peripheral controllers in embedded PC platforms. IC Role / Device Role / Timing Role: Dual-reset output drives both CPU's active-low nRESET and southbridge's active-high RESET_REQ; 4.64V threshold matches 5V rail tolerance. Use Value: Eliminates need for discrete reset generators and level translators, reducing BOM count and board area. |
| Microcontroller-Based Industrial Controllers | Communications Systems with Dual-Rail Power |
Use Scenario: Supervising 3.3V MCU core supply and 12V analog front-end in programmable logic controllers. IC Role / Device Role / Timing Role: VDD monitors 3.3V rail; PFI (with resistor divider) monitors scaled 12V; RST resets MCU while PFO triggers analog fault latch. Use Value: Single IC replaces two discrete supervisors, simplifying design and improving cross-rail coordination during faults. | Use Scenario: Detecting failure of ±5V supplies in telecom line cards or optical transceivers. IC Role / Device Role / Timing Role: VDD monitors +5V; PFI monitors –5V via bipolar divider network; PFO drives MR to assert system-wide reset on negative rail loss. Use Value: Enables full-system reset on asymmetric supply failure without additional comparators or isolation components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL88707IB844Z | 4.38V VDD threshold (vs. 4.64V); identical pinout, features, and package. | Suitable for 4.5V nominal rails or tighter tolerance 5V systems where lower trip point is required. | Select when supervising 4.5V supplies or when marginally higher VDD trip would cause premature reset. |
| MAX6326US46D3+ | 4.63V threshold, 200ms fixed tPOR, no CPOR adjustment, no PFI/PFO, single RST output. | Lacks auxiliary monitoring and adjustable reset timing; simpler footprint but less feature-rich. | Choose for cost-sensitive, space-constrained designs where only basic 5V supervision is needed and PFI/WDT are unnecessary. |
Compared with ISL88707IB846Z, ISL88707IB844Z offers identical functionality at a lower voltage threshold for tighter 5V regulation, while MAX6326US46D3+ provides a minimal-pin-count alternative without PFI, CPOR, or dual reset outputs-making it suitable only for basic reset generation without auxiliary monitoring or timing flexibility.
Availability
ISL88707IB846Z is available at Aetrix Electronics and suitable for portable electronics, industrial controllers, and communications systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL88707IB846Z 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 semiconductor leader delivering high-performance analog, power management, and embedded processing solutions for industrial, automotive, and infrastructure markets.
The ISL88707IB846Z belongs to the ISL887xx family of microprocessor supervisors, designed specifically for cost-sensitive, low-power embedded systems requiring precise voltage monitoring, flexible reset timing, and auxiliary power-fail detection in compact SOIC packages.
FAQ
What is the exact VDD reset threshold voltage for ISL88707IB846Z?
The ISL88707IB846Z has a factory-programmed VDD threshold of 4.64V, specified with ±1.8% accuracy over temperature (–40°C to +85°C). This value is confirmed in the Ordering Information table and Electrical Specifications section of FN8092 Rev 6.00, where min/typ/max values are 4.556V/4.640V/4.724V. The part marking "I46Z" directly encodes this 4.64V threshold.
Does ISL88707IB846Z support adjustable power-on reset delay, and how is it implemented?
Yes, ISL88707IB846Z supports adjustable power-on reset delay (tPOR) via the CPOR pin. Connecting an external capacitor between CPOR and GND extends tPOR beyond the nominal 200ms - for example, a 50pF capacitor increases tPOR to approximately 1.4s. This feature is exclusive to ISL88707 and ISL88708 variants, as documented in Figure 3 and Section "Adjusting tPOR" on page 7 of FN8092 Rev 6.00.
What are the key differences between ISL88707IB846Z and ISL88705IB846Z?
ISL88707IB846Z includes both RST (active-high) and RST (active-low) outputs plus the CPOR pin for tPOR adjustment, whereas ISL88705IB846Z provides only RST and lacks CPOR. Both share the same 4.64V threshold, PFI/PFO, WDI/WDO, and MR functionality. The ISL88707IB846Z is functionally superset of ISL88705IB846Z, enabling dual-reset domain interfacing and customizable timing.
Can ISL88707IB846Z monitor voltages other than the main VDD supply?
Yes, ISL88707IB846Z includes a dedicated PFI (Power-Fail Input) pin with a precise 1.25V internal threshold. By connecting an external resistor divider to PFI, it can monitor auxiliary voltages such as battery levels, secondary rails, or negative supplies - as demonstrated in Figures 2 and 16 of FN8092 Rev 6.00. The PFO output reflects the PFI comparison result.
What is the maximum supply voltage and operating temperature range for ISL88707IB846Z?
The ISL88707IB846Z supports a supply voltage range of 2.0V to 5.5V and operates across the industrial temperature range of –40°C to +85°C. These values are explicitly stated in the "Recommended Operating Conditions" table on page 5 of FN8092 Rev 6.00 and validated in the Absolute Maximum Ratings section.
ISL88707IB846Z 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:
- 4.64V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL88707IB846Z FAQ
1.How can I place an order for ISL88707IB846Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88707IB846Z 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 ISL88707IB846Z reliable?
The price and inventory of ISL88707IB846Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88707IB846Z is usually 5 days.
3.What payment methods are accepted for ISL88707IB846Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88707IB846Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88707IB846Z?
ISL88707IB846Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88707IB846Z 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 ISL88707IB846Z?
For technical support, including ISL88707IB846Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88707IB846Z requirements.
6.How does Aetrix verify that ISL88707IB846Z is sourced from the original manufacturer or authorized distributors?
All ISL88707IB846Z 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 ISL88707IB846Z meets industry standards.
7.What is the process for return or replacement of ISL88707IB846Z?
All ISL88707IB846Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL88707IB846Z, 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 ISL88707IB846Z part is unused and in its original packaging.
Return procedure for ISL88707IB846Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL88707IB846Z 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…
