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Renesas ISL88012IH544Z-T7A
- Part No.:
- ISL88012IH544Z-T7A
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ISL88012IH544Z-T7A.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,092
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Product details
Overview
ISL88012IH544Z-T7A from Intersil is a dual-voltage supervisor IC in 5-lead SOT-23 packaging, providing fixed 4.38V VDD monitoring and user-adjustable VMON down to 0.6V, ±1.5% threshold accuracy, 200ms power-on reset timeout, complementary active-low (RST) and active-high (RST) reset outputs, and manual reset input - deployed for reliable µP power sequencing in embedded control and portable systems.
For engineers reviewing the ISL88012IH544Z-T7A datasheet, ISL88012IH544Z-T7A pinout, ISL88012IH544Z-T7A application, or ISL88012IH544Z-T7A equivalent, key selection criteria include dual-threshold supervision capability, ultra-low 5.5µA supply current, reset validity down to VDD = 1V, immunity to supply transients, and compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The ISL88012IH544Z-T7A integrates two independent voltage monitoring paths: one compares VDD against a factory-trimmed 4.38V threshold (±1.5%), while the second monitors VMON against an internal 600mV reference, configurable via external resistor divider for custom trip points ≥0.6V. Reset assertion occurs when either input falls below its threshold and persists for tPOR = 200ms after recovery.
It features complementary push-pull RST and open-drain RST/MR outputs, debounced manual reset input (MR), and operates across 2.0V–5.5V supply range with 5.5µA typical quiescent current. No watchdog timer or CPOR adjustment capability is present - distinguishing it from ISL88013/ISL88014 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 4.38V ±1.5% - factory-programmed trip point for primary supply monitoring |
| VMON Threshold | 0.6V nominal (adjustable ≥0.6V) - internal reference enables custom voltage supervision |
| POR Timeout | 200ms typ - ensures stable power-up before releasing reset to microprocessor |
| Supply Current | 5.5µA typ at 2.5V - enables long battery life in portable equipment |
| Reset Validity | Down to VDD = 1V - guarantees functional reset assertion during brownout |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded applications |
| Package | 5-lead SOT-23 - compact footprint for space-constrained PCB layouts |
Pinout & Package
5-lead Pb-free SOT-23 package (JEDEC MO178AA, Intersil P5.064), 1.90mm × 1.30mm body, 0.95mm lead pitch, 0.60mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RST/MR | Open-drain active-low reset output / debounced manual reset input | Drives low on reset assertion; accepts <100mV pulse ≥1µs for manual reset initiation |
| 2: GND | Ground reference | Common return path for all internal circuitry and external bias networks |
| 3: RST | Push-pull active-high reset output | Drives high during normal operation; goes low only during reset assertion |
| 4: VDD | Power supply and monitored voltage input | Supplies device and serves as primary monitored rail with 4.38V trip point |
| 5: VMON | Adjustable voltage monitor input | Compares external voltage (via resistor divider) against 0.6V reference for secondary supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage supervision | Simultaneously monitors VDD at 4.38V and VMON at user-configurable ≥0.6V - supports multi-rail system integrity checks |
| Complementary reset outputs | RST (push-pull high-active) and RST/MR (open-drain low-active) enable direct interface with diverse logic families without level-shifting |
| ±1.5% threshold accuracy over temp | Ensures precise trip-point consistency across –40°C to +85°C - critical for fail-safe power management |
| Ultra-low 5.5µA supply current | Minimizes standby power draw - extends battery runtime in portable instrumentation and handheld devices |
| Reset valid down to VDD = 1V | Maintains supervisory function during deep brownout - prevents premature release of reset under marginal supply conditions |
Applications
| Industrial Embedded Control | Portable Instrumentation |
|---|---|
Use Scenario: Monitoring 5V main supply and 3.3V I/O rail in programmable logic controllers with FPGA configuration hold-off. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting synchronized reset until both rails stabilize above 4.38V and 3.3V×(R1+R2)/R2 respectively. Use Value: Prevents FPGA misconfiguration and CPU lockup during cold start or line transient events. | Use Scenario: Battery-powered handheld multimeter requiring reliable power-on initialization and low-quiescent-current supervision. IC Role / Device Role / Timing Role: Primary VDD supervisor (4.38V) and secondary VMON supervisor (set to 2.8V for Li-ion cell undervoltage cutoff). Use Value: Enables safe shutdown before battery depletion, extending usable charge cycle and preventing data corruption. |
| Computer Peripheral Power Management | Intelligent Sensor Node |
Use Scenario: USB-powered docking station validating +5V bus integrity and auxiliary 3.3V LDO output before enabling peripheral enumeration. IC Role / Device Role / Timing Role: Fixed VDD monitor (4.38V) ensures host-supplied 5V meets spec; adjustable VMON (3.3V) verifies local regulation. Use Value: Eliminates enumeration failures caused by marginal or noisy 5V/3.3V supplies - improves plug-and-play reliability. | Use Scenario: Wireless environmental sensor node powered by coin cell, requiring deterministic wake-up and brownout protection. IC Role / Device Role / Timing Role: Supervises main 3V supply (via VMON resistor divider) and asserts reset if voltage drops below 2.4V during RF transmission burst. Use Value: Guarantees clean MCU restart after voltage sag, avoiding corrupted sensor readings or failed BLE advertisements. |
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-T7A | No fixed VDD threshold; VMON adjustable from 0.6V; includes CPOR pin for extended POR timeout | Lacks dedicated 4.38V VDD monitoring - requires external resistor divider for primary rail supervision | Select when adjustable primary rail monitoring and programmable POR delay are required over factory-trimmed fixed threshold |
| MAX6326UR43D3+T | Single 4.3V fixed reset; no VMON input; 200ms POR; SOT-23-5 package; ±2.5% threshold accuracy | Provides only single-rail supervision - cannot replace dual-monitoring functionality without adding discrete components | Select only for cost-sensitive single-supply applications where secondary voltage monitoring is unnecessary |
Compared with ISL88012IH544Z-T7A, ISL88014IH5Z-T7A offers greater flexibility in primary rail setup but sacrifices factory-calibrated accuracy and simplicity, while MAX6326UR43D3+T reduces BOM count for single-rail use cases but eliminates dual-threshold capability entirely.
Availability
ISL88012IH544Z-T7A is available at Aetrix Electronics and suitable for industrial embedded control, portable instrumentation, and computer peripheral power management requiring stable component supply despite end-of-life status.
Supply support for ISL88012IH544Z-T7A 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 consumer markets.
The ISL8801x family was designed specifically for low-power, high-accuracy voltage supervision in space-constrained embedded systems - emphasizing threshold stability, minimal quiescent current, and robust reset signaling across wide temperature ranges.
FAQ
What is the exact voltage threshold monitored at the VDD pin of the ISL88012IH544Z-T7A?
The ISL88012IH544Z-T7A monitors the VDD pin against a factory-programmed threshold of 4.38V, with ±1.5% accuracy over the full –40°C to +85°C operating temperature range. This value is confirmed in the Ordering Information table (page 3) and Electrical Specifications (page 6) of FN8093 Rev 5.00, and applies exclusively to the ISL88012IH544Z-T7A variant.
Does the ISL88012IH544Z-T7A support watchdog timer functionality?
No, the ISL88012IH544Z-T7A does not include watchdog timer capability. Watchdog functionality is exclusive to ISL88013 and ISL88015 variants per the Product Features Table (page 5) and Functional Block Diagrams (page 4). The ISL88012IH544Z-T7A provides dual voltage monitoring, manual reset, and complementary reset outputs - but no WDI pin or watchdog timing circuitry.
Can the ISL88012IH544Z-T7A monitor a 3.3V supply using the VMON pin?
Yes, the ISL88012IH544Z-T7A can monitor a 3.3V supply via the VMON pin by configuring an external resistor divider to scale the input so that 3.3V produces exactly 0.6V at VMON. Using Equation 1 from page 9 of FN8093, a ratio of R1/R2 ≈ 4.5 achieves this. The device's VMON input is specified for adjustable trip points ≥0.6V, making 3.3V supervision fully supported.
What is the purpose of the RST/MR pin on the ISL88012IH544Z-T7A?
The RST/MR pin on the ISL88012IH544Z-T7A serves a dual function: it acts as an open-drain active-low reset output (RST) and as a debounced manual reset input (MR). When asserted, it pulls low to signal reset; when used as input, it triggers reset upon detection of a <100mV pulse lasting ≥1µs - enabling push-button or controller-driven system reset without external logic.
Is the ISL88012IH544Z-T7A still in active production?
No, the ISL88012IH544Z-T7A is marked "No longer available or supported" in the official Ordering Information table (page 3 of FN8093 Rev 5.00). However, Aetrix Electronics maintains legacy inventory and provides lifecycle coordination support, including traceable sourcing and BOM continuity management for ongoing production programs relying on ISL88012IH544Z-T7A.
ISL88012IH544Z-T7A 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-T7A FAQ
1.How can I place an order for ISL88012IH544Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88012IH544Z-T7A 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-T7A reliable?
The price and inventory of ISL88012IH544Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88012IH544Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL88012IH544Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88012IH544Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88012IH544Z-T7A?
ISL88012IH544Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88012IH544Z-T7A 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-T7A?
For technical support, including ISL88012IH544Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88012IH544Z-T7A requirements.
6.How does Aetrix verify that ISL88012IH544Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL88012IH544Z-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL88012IH544Z-T7A?
All ISL88012IH544Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL88012IH544Z-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL88012IH544Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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