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Renesas ISL88012IH544Z-TK
- Part No.:
- ISL88012IH544Z-TK
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ISL88012IH544Z-TK.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,571
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Product details
Overview
ISL88012IH544Z-TK from Intersil is a dual-voltage supervisor IC in 5-lead SOT-23 packaging, providing fixed 4.38V VDD monitoring and user-adjustable VMON threshold down to 0.6V, with complementary active-low (RST) and active-high (RST) reset outputs, 200ms POR timeout, and manual reset input - used for reliable power-up sequencing and brownout protection in microprocessor-based systems.
For engineers reviewing the ISL88012IH544Z-TK datasheet, ISL88012IH544Z-TK pinout, ISL88012IH544Z-TK application, or ISL88012IH544Z-TK equivalent, this page delivers verified specifications, exact pin functions, real-world use cases, and validated alternative parts - all aligned to FN8093 Rev 5.00 (Dec 2015) and Intersil's official ordering information.
Technical Context
The ISL88012IH544Z-TK integrates two independent voltage monitoring paths: one compares VDD against a factory-trimmed 4.38V ±1.5% threshold (VTHVDD), while the second monitors VMON against an internal 600mV reference (VTHVMON), adjustable upward via external resistor divider. Reset assertion occurs when either input falls below its trip point, with hysteresis (44mV at VDD) preventing noise-induced chatter.
It features complementary push-pull RST and open-drain RST/MR outputs, supports manual reset via debounced MR input (≤100mV, ≥1µs pulse), and asserts valid reset signals down to VDD = 1V. Supply current is ultra-low at 7–11.5µA across 2.5–5.0V operation, enabling battery-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.38V ±1.5% over -40°C to +85°C - ensures precise 5V rail supervision without external calibration |
| VMON Threshold | 0.6V nominal, adjustable >0.6V via resistor divider - enables custom monitoring of any supply ≥0.6V |
| POR Timeout | 200ms typical - holds system in reset until both VDD and VMON stabilize above thresholds |
| Supply Current | 7µA @ 3.3V, 8µA @ 5.0V - minimizes quiescent load in always-on monitoring circuits |
| Reset Outputs | Complementary RST (push-pull high/low) and RST/MR (open-drain low-only) - supports direct MCU reset and external pull-up flexibility |
| Operating Range | VDD = 2.0–5.5V, Temp = -40°C to +85°C - compatible with industrial embedded and portable designs |
| Reset Validity | Reset asserted down to VDD = 1V - guarantees fail-safe behavior during deep brownout conditions |
Pinout & Package
ISL88012IH544Z-TK uses a Pb-free 5-lead SOT-23 package (Intersil pkg drawing P5.064), footprint-compatible with JEDEC MO178AA and EIAJ SC-74 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST/MR | Combined manual reset input / active-low reset output | Debounced active-low MR input (≤100mV); open-drain RST output requiring external pull-up |
| 2 - GND | Ground reference | Common return path for all internal comparators, oscillator, and reset logic |
| 3 - RST | Active-high reset output | Push-pull output asserting HIGH during reset; drives MCU nRESET directly without pull-up |
| 4 - VDD | Supply voltage and primary monitored input | Power source (2.0–5.5V) and fixed-threshold monitor input (4.38V trip) |
| 5 - VMON | Adjustable voltage monitor input | Monitors external supply via resistor divider; compared to 600mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneous fixed 4.38V VDD monitoring + user-configurable VMON (≥0.6V) - eliminates need for separate supervisors |
| Complementary reset outputs | RST (push-pull) and RST/MR (open-drain) - supports both direct MCU reset and flexible system-level reset signaling |
| Manual reset with debounce | MR pin accepts push-button or controller-driven low pulse ≥1µs; internal filtering prevents false triggers |
| ±1.5% threshold accuracy over temp | Factory-trimmed VTHVDD and VTHVMON ensure stable trip points across -40°C to +85°C - reduces design margin overhead |
| Ultra-low 7–11.5µA supply current | Enables continuous monitoring in battery-powered devices without compromising runtime |
Applications
| Industrial PLC Power Sequencing | Medical Sensor Node Supervision |
|---|---|
Use Scenario: Monitoring 5V main rail and 3.3V sensor interface rail in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Dual-supervisor ensuring both rails exceed 4.38V and 3.3V×(R2/(R1+R2)) before releasing RST/RST to enable CPU and ADC. Use Value: Prevents firmware execution during partial power-up; hysteresis avoids oscillation during rail settling. |
Use Scenario: Battery-powered wearable sensor node with 3.6V Li-ion supply and 1.8V analog front-end. IC Role / Device Role / Timing Role: VMON monitors scaled-down battery voltage (via resistor divider) while VDD monitors regulated 3.6V rail; asserts reset if either drops below safe operating level. Use Value: Enables graceful shutdown before brownout-induced data corruption; 7µA current extends battery life. |
| Embedded Edge Gateway Boot Integrity | Test Equipment Power Good Signaling |
Use Scenario: Verifying stable 12V input and 5V FPGA core voltage before allowing boot ROM execution in an industrial edge gateway. IC Role / Device Role / Timing Role: VDD monitors 5V rail; VMON monitors 12V via 10k/180k divider (trip = 11.4V); RST held active until both clear. Use Value: Guarantees FPGA configuration completes only after all supplies meet spec - prevents bitstream load failure. |
Use Scenario: Generating "Power Good" signal for automated test equipment that requires simultaneous 5V and ±12V rails. IC Role / Device Role / Timing Role: One ISL88012IH544Z-TK supervises +5V (VDD), another monitors -12V via inverting amplifier feeding VMON - combined RST outputs drive AND gate for PGOOD. Use Value: Provides deterministic, low-jitter power-good assertion without external logic or timing components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL88014IH5Z-TK | No fixed VDD threshold; VMON adjustable (0.6V base); CPOR pin for POR extension; no watchdog or RST output | Best for designs needing only adjustable monitoring and extended POR delay, not fixed 5V rail supervision | Select when VDD monitoring is unnecessary and longer tPOR (>200ms) is required via capacitor on CPOR |
| MAX6326US43D3+ | Single 4.3V fixed threshold; no VMON; no RST output; 1.25V min VDD operation; 3µA IDD | Suitable only for basic VDD-only supervision where dual monitoring is not needed | Choose for ultra-low-power, single-rail applications where space or cost precludes dual-monitoring capability |
Compared with ISL88012IH544Z-TK, ISL88014IH5Z-TK removes fixed VDD supervision but adds POR adjustability, while MAX6326US43D3+ offers lower current and simpler function at the cost of monitoring flexibility - making ISL88012IH544Z-TK optimal for dual-rail integrity assurance.
Availability
ISL88012IH544Z-TK is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, and embedded computing applications requiring stable component supply and long-term design continuity despite its legacy status.
Supply support for ISL88012IH544Z-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
Intersil Corporation (now part of Renesas Electronics) is a pioneer in precision analog and power management ICs, delivering high-reliability solutions for industrial, computing, and communications infrastructure.
The ISL88012IH544Z-TK belongs to Intersil's ISL8801x family of voltage supervisors - engineered for robust, low-power power-on reset and dual-supply monitoring in space-constrained embedded systems.
FAQ
What is the exact VDD voltage threshold for ISL88012IH544Z-TK?
The ISL88012IH544Z-TK has a factory-programmed VDD threshold of 4.38V, specified with ±1.5% accuracy over the full -40°C to +85°C temperature range. This value is confirmed in the Ordering Information table (page 3) and Electrical Specifications (page 6) of FN8093 Rev 5.00, where VTHVDD = 4.31V (min), 4.38V (typ), 4.45V (max) for the IH544Z variant.
Does ISL88012IH544Z-TK support adjustable POR timeout?
No, ISL88012IH544Z-TK does not support adjustable POR timeout. The datasheet confirms adjustable CPOR functionality applies only to ISL88011 and ISL88014. For ISL88012IH544Z-TK, tPOR is fixed at 200ms (typical), as stated in the Electrical Specifications table (page 7) under "tPOR POR Timeout Delay" for ISL88012.
What is the function of the VMON pin on ISL88012IH544Z-TK?
The VMON pin on ISL88012IH544Z-TK serves as a user-adjustable voltage monitor input, compared internally to a 600mV reference (VTHVMON). When used with an external resistor divider, it enables monitoring of any supply ≥0.6V - for example, scaling a 12V rail to 0.6V using 10kΩ/180kΩ yields a 11.4V trip point, as shown in Figure 12 of FN8093 Rev 5.00.
Can ISL88012IH544Z-TK be used in battery-powered applications?
Yes, ISL88012IH544Z-TK is well-suited for battery-powered applications due to its ultra-low 7µA supply current at 3.3V (per page 6), operation down to VDD = 2.0V, and reset validity down to VDD = 1V. Its dual monitoring also allows simultaneous supervision of battery voltage (via VMON) and regulated rail (VDD), enabling early low-battery warning and controlled shutdown.
Is ISL88012IH544Z-TK still in production or supported?
No - per the Ordering Information table (page 3), ISL88012IH544Z-TK is explicitly marked "No longer available or supported". However, Aetrix Electronics maintains legacy supply channels and provides full technical documentation, pinout validation, and alternative selection guidance to support ongoing production and repair of existing designs using ISL88012IH544Z-TK.
ISL88012IH544Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.38V, Adj
- 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:
- 5-SOT
ISL88012IH544Z-TK FAQ
1.How can I place an order for ISL88012IH544Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88012IH544Z-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 ISL88012IH544Z-TK reliable?
The price and inventory of ISL88012IH544Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88012IH544Z-TK is usually 5 days.
3.What payment methods are accepted for ISL88012IH544Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88012IH544Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88012IH544Z-TK?
ISL88012IH544Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88012IH544Z-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 ISL88012IH544Z-TK?
For technical support, including ISL88012IH544Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88012IH544Z-TK requirements.
6.How does Aetrix verify that ISL88012IH544Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL88012IH544Z-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 ISL88012IH544Z-TK meets industry standards.
7.What is the process for return or replacement of ISL88012IH544Z-TK?
All ISL88012IH544Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL88012IH544Z-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 ISL88012IH544Z-TK part is unused and in its original packaging.
Return procedure for ISL88012IH544Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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