The NCP803SN438T1G is a microprocessor supervisor circuit designed to monitor supply voltage (VCC) in digital systems and provide a reset signal to the host processor when necessary. It features a low supply current of 0.5 µA at 3.3 V, making it suitable for battery-powered applications. The device operates over a wide voltage range of 1.0 V to 5.5 V and is optimized to reject fast transient glitches on the VCC line. The reset output is active within 10 µs of VCC falling below the reset voltage threshold and remains active for a timeout period that can be trimmed by the factory, ranging from 140 ms to 460 ms. The NCP803SN438T1G has an open-drain active-low RESET output and is available in a SOT-23 package. It operates within a temperature range of -40°C to 105°C and is compliant with RoHS standards. Typical applications include computers, embedded systems, and critical microprocessor power supply monitoring.
Voltage Supervisor/Reset IC, Fixed, 1 Channel, +4.38V, PDSO3
Supervisor Open Drain or Open Collector 1 Channel SOT-23-3 (TO-236)
Supervisor Open Drain or Open Collector 1 Channel SOT-23-3 (TO-236)
4.38V Voltage Supervisor, SOT-23, 800nA, Reset IC Product overview: NCP803SN438T1G from onsemi is a Voltage Supervisor IC for reset control, voltage monitoring, brownout detection, power sequencing, and reliable embedded system startup. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 4.38V, SOT-23. Search-friendly keywords include voltage supervisor, reset IC, power monitoring, brownout detection, 4.38V, SOT-23, Voltage Supervisor IC, Supervisors. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 691-NCP803SN438T1G can be used for catalog matching and distributor lookup.
Manufacturer: ON Semiconductor
Win Source Part Number: 060083-NCP803SN438T1
Packaging: Reel - TR
Type: Simple Reset/Power-On Reset
Mounting: SMD (SMT)
Output: Open Drain or Open Collector
Reset: Active Low
Number of Voltages Monitored: 1
Reset Timeout: 140 ms Minimum
Voltage - Threshold: 4.38V
Family Name: NCP803
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 105°C (TJ)
Case / Package: SOT-23-3 (TO-236)
Alternative Parts (Cross-Reference): SGM803-MXN3/TR; MAX6802UR45D1+ ; MAX6802UR42D2+T; MAX6802UR41D1;
Introduction Date: January 01, 2002
ECCN: EAR99
Country of Origin: Malaysia
Estimated EOL Date: 2025
Halogen Free: Compliant
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 38 pct.
Supply and Demand Status: Limited
Supervisory Circuits 4.38V 20mA 3-Pin w/uP Reset N-Channel
Supervisor Open Drain or Open Collector 1 Channel SOT-23-3 (TO-236)
SUPERVISOR CKT, 0.8UA, 5.5V, SOT-23-3; Threshold Voltage:4.38V; No. of Supervisors / Monitors:1Monitors; Supply Voltage Min:1.2V; Supply Voltage Max:5.5V; Reset Type:Active-Low, Open-Drain; Digital IC Case:SOT-23; No. of Pins:3Pins; RoHS Compliant: Yes
IC SUPERVISOR 1 CHANNEL SOT23-3
IC SUPERVISOR 1 CHANNEL SOT23-3
| Rochester Electronics | DigiKey | ERSAELECTRONICS PTE. LTD. | Win Source Electronics | VAST STOCK CO., LIMITED | Quarktwin Technology Ltd. | Newark, An Avnet Company | Shenzhen Shengyu Electronics Technology Limited | Lingto Electronic Limited | |
|---|---|---|---|---|---|---|---|---|---|
| Product Category | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips | Supervisory Circuits and Battery Monitor Chips |
| Product Number | NCP803SN438T1G | NCP803SN438T1GOSCT-ND | 691-NCP803SN438T1G | 060083-NCP803SN438T1G | NCP803SN438T1G | NCP803SN438T1G | 42Y0857 | NCP803SN438T1G | NCP803SN438T1G |
| Product Name | Supervisors | 4.38V SOT-23 Voltage Supervisor IC | PMIC - PMIC - Supervisors - NCP803SN438T1G | Supervisory Circuits | Supervisors | Supervisor Ckt, 0.8Ua, 5.5V, Sot-23-3; Threshold Voltage Onsemi | Integrated Circuits (ICs) - Power Management (PMIC) - Supervisors | PMIC - Supervisors | |
| Type | SOT-23-3 | SOT-23; TO-236-3, SC-59, SOT-23-3 | SOT-23 | SOT-23-3 (TO-236) | TO-236-3, SC-59, SOT-23-3 | SOT-23; TO-236-3, SC-59, SOT-23-3 | |||
| Features | Manual Reset | ||||||||
| Output Options | Open Drain; Active Low | Open Drain; Inverting; Active Low | Open Drain | Open Drain; Open Drain or Open Collector | |||||
| Threshold | 4.38 volts | 4.38 volts | 4.38 volts | 4.38 volts | 4.38 volts | ||||
| Operating Temperature | -40 to 105 C (-40 to 221 F) | -40 C (-40 F) | -40 to 105 C (-40 to 221 F) | -40 to 105 C (-40 to 221 F) | -40 to 105 C (-40 to 221 F) | -40 to 105 C (-40 to 221 F) |
