MCP6543-I/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
MCP6543-I/MS is a single-channel push-pull output analog comparator from Microchip with a 1.6 V minimum supply voltage and chip select input. It features an ultra-low input bias current of 0.1 nA and a maximum input offset voltage of 7 mV for accurate threshold detection. Packaged in an 8-pin MSOP for compact signal-chain and battery-powered designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP6543-I/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.0912(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP6543-I/MS?
- Ultra-low 0.1 nA input bias current minimizes errors when comparing high-impedance sensor signals without requiring buffer stages
- Push-pull output stage drives logic directly without an external pull-up resistor, reducing BOM and simplifying PCB routing
- 1.6 V minimum supply voltage enables reliable operation from a single AAA cell or low-voltage regulated rail in energy-harvesting systems
What is MCP6543-I/MS used for?
The MCP6543-I/MS is well-suited for threshold detection in battery-powered IoT nodes, wearable devices, and portable instrumentation where the comparator must operate reliably from supply voltages as low as 1.6 V. Its chip select input allows the device to be disabled during sleep intervals to conserve power in duty-cycled sensing applications. The push-pull output directly interfaces with low-voltage microcontroller GPIO pins without an external pull-up, simplifying level detection, zero-crossing detection, and window-comparator designs.
What are the specifications of MCP6543-I/MS?
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-8 |
| Factory Lead Time | 11Weeks |
| YTEOL | 8 |
| Amplifier Type | COMPARATOR |
| Average Bias Current-Max (IIB) | 0.0001 µA |
| Input Offset Voltage-Max | 7000 µV |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Type | PUSH-PULL |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Response Time-Nom | 4000ns |
| Supply Current-Max | 0.001mA |
| Supply Voltage Limit-Max | 7V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP6543-I/MS datasheet?
MCP6543-I/MS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP6543-I/MS?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low can the supply voltage of the MCP6543-I/MS go while still operating correctly?
The MCP6543-I/MS operates from a minimum supply voltage of 1.6 V, allowing it to remain functional from a single alkaline or NiMH cell in end-of-discharge conditions. This makes it suitable for ultra-low-power battery monitoring, energy-harvesting threshold detection, and any circuit that must continue operating as the supply rail droops below 2 V.
Why does the 0.1 nA input bias current of the MCP6543-I/MS matter for high-impedance sensor interfaces?
With an input bias current of only 0.1 nA, the comparator introduces negligible loading on high-impedance sources such as photodiodes, pH electrodes, and piezoelectric sensors. High bias current in competing devices causes a voltage error across the source impedance that can exceed the comparator's 7 mV offset budget, degrading threshold accuracy in precision detection circuits.
How does the chip select feature of the MCP6543-I/MS reduce power in a duty-cycled system?
The CS pin places the comparator in a low-power standby state when asserted, disabling internal biasing and reducing supply current substantially. In a microcontroller-managed sensor node that wakes every few seconds to compare a threshold, deselecting the MCP6543-I/MS between measurements can cut its average current consumption to the nanoamp range, extending battery life by hours to days.
Does the push-pull output of the MCP6543-I/MS interface directly with 3.3 V microcontroller GPIO pins?
Yes. Unlike open-drain comparators that require an external pull-up resistor to define the high state, the MCP6543-I/MS push-pull output actively drives both logic high and logic low transitions. It is compatible with standard 3.3 V and lower-voltage CMOS GPIO thresholds, eliminating the need for an external resistor and reducing power consumption at the output node.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.0912 | $0.09 |
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