MCP121T-300E/TT
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Mfr | Microchip Technology |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Type | Simple Reset/Power-On Reset |
| Output | Open Drain or Open Collector |
| Number of Voltages Monitored | 1 |
| Supplier Device Package | SOT-23-3 |
| Voltage - Threshold | 2.93V |
| Reset | Active Low |
| Reset Timeout | 80ms Minimum |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | MCP121 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
MCP121T-300E/TT voltage supervisor and reset IC
The MCP121T-300E/TT from Microchip Technology is a precision voltage supervisor and reset IC designed to monitor power supply voltages in microcontroller-based systems and digital circuits. This advanced supervisor operates from a wide voltage range of 1.6V to 5.5V and provides a fixed 3.00V threshold voltage with ±1.5% accuracy over temperature, making it ideal for ensuring proper system initialization and preventing erroneous operation during power-up, power-down, and brown-out conditions. The MCP121T-300E/TT consumes just 6 μA typical quiescent current and operates across the industrial temperature range of -40°C to +125°C, offering a reliable and cost-effective solution for consumer electronics, industrial controls, automotive systems, and battery-powered applications where power supply integrity is critical for system stability.
Applications
The MCP121T-300E/TT is extensively used in microcontroller-based systems for power-on reset generation, ensuring proper initialization of processors, DSPs, and FPGAs in industrial control systems, automotive electronics, and consumer products. Battery-powered devices employ the supervisor for low-voltage detection and system shutdown in portable instruments, medical devices, and handheld equipment to prevent data corruption during battery discharge. Automotive electronics utilize the IC for engine control units, body control modules, and infotainment systems where reliable power monitoring is essential for functional safety.
Alternative Reset Circuit Recommendations
● TPS3809G01DBVR (Texas Instruments): A 3.0V voltage supervisor with 1.5% accuracy and 200 ms fixed delay in SOT-23 package.
● CAT811STBI-T3 (ON Semiconductor): A 3.08V microprocessor supervisor with active-low reset output in SOT-23-3 package.
● MAX809LEUR+T (Analog Devices): A 3.08V voltage monitor with manual reset capability and 140 ms delay in SOT-23 package.
● NCP301SN30T1G (ON Semiconductor): A 3.0V voltage detector with 2.5% accuracy and low 4 μA current consumption.
