About Supervisory Circuits

Supervisory Circuits

Supervisory circuits are electronic circuits used to monitor and control the operation of other circuits or systems. They are commonly found in appliances, industrial equipment and other electronic systems where reliable operation is required. Supervisory circuits monitor and control the behavior of other circuits and systems, providing feedback and making adjustments as necessary to keep them within acceptable parameters. They are generally composed of several parts, including sensors, comparators, alarms, timers, and relays. The sensors monitor the voltage, current, and temperature of the circuits and systems, while the comparators compare these values to normal operating parameters. Alarms are triggered when parameters are out of range, while the relays are used to activate corrective actions, such as turning off equipment or engaging a fail-safe mode. Timers are typically used to monitor the length of time a certain condition has been present, allowing the supervisor circuit to shut down the system before it is damaged by an enduring failure.

Supervisory Circuits

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Image	Stock Code(▲▼)	Description	Manufacturer	Global Stock ⓘ (▲▼)	Price(USD) (Ex. GST)(▲▼)	Enter Qty	Type	Mounting Style	Output Voltage	Package / Case	Threshold Voltage	Number of Inputs Monitored	Output Type	Manual Reset	Watchdog	Watchdog Timers	Battery Backup Switching	Reset Delay Time	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Accuracy	Series	Qualification	Packaging

BD49E41G-MTR

Supervisory Circuits VOLTAGE DETECTOR

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 5820
Ship by Wed. 27 Aug to Fri. 29 Aug

August 2025

August 2025
	S	M	T	W	T	F	S
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9
33	10	11	12	13	14	15	16
34	17	18	19	20	21	22	23
35	24	25	26	27	28	29	30
36	31	1	2	3	4	5	6

USD 0.2776

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

4.1 V

1 Input

CMOS

No Manual Reset

No Watchdog

No Backup

100 us

10 V

- 40 C

+ 105 C

1 %

BD49ExxG - M

AEC - Q101

Reel , Cut Tape

MCP130T-300I/TT

Supervisor Integrated Circuit; power on reset monitor (PoR)

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.2812

Multiples of: 3000

MCP130T-450I/TT

Supervisor Integrated Circuit; power on reset monitor (PoR)

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.2916

Multiples of: 3000

MCP121T-240E/TT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.2916

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.32 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

120 ms

5.5 V

- 40 C

+ 125 C

Mcp121

Reel

BD46302G-TR

Supervisory Circuits RESET DETEC VOLT 3.1V

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ROHM

Availability : 5820
Ship by Wed. 27 Aug to Fri. 29 Aug

August 2025

August 2025
	S	M	T	W	T	F	S
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9
33	10	11	12	13	14	15	16
34	17	18	19	20	21	22	23
35	24	25	26	27	28	29	30
36	31	1	2	3	4	5	6

USD 0.2976

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

3 V

1 Input

Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

200 ms

10 V

- 40 C

+ 105 C

1 %

Bd46

Reel

NCP300LSN44T1G

Supervisory Circuits 4.4V Detector w/Reset Low

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

ON Semiconductor

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3049

Multiples of: 1

Voltage Monitors

Smd/Smt

SOT - 23 - 5 TH in (TSOP - 5)

4.4 V

1 Input

No Manual Reset

No Watchdog

10 V

- 40 C

+ 125 C

2 %

Ncp300

Reel

MIC6315-31D3UY TR

Supervisory Circuits Reset Generator, Active Low,4.63V VTH, Manual Reset, SOT-145 - Lead Free

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3062

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

3 V , 3.3 V , 5 V

1 Input

Active Low, Open Drain

Manual Reset

No Watchdog

No Backup

0.5 us

5.5 V

- 40 C

+ 85 C

Mic6315

Reel

MIC6315-31D2UY-TR

Supervisory Circuits Reset Generator, Active Low, 3.08V VTH, Manual Reset

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3062

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

Reel

MIC811LUY-TR

Supervisory Circuits Microprocessor Reset Circuit with Manual Reset, Push-Pull Active-Low Output, 4.63V Threshold, 140ms reset pulse in SOT143-4 - Lead Free

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3353

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

3 v , 3.3 v , 5 V

1 Input

Active Low, Push - Pull

Manual Reset

No Watchdog

no watchdog

No Backup

0.5 us

5.5 V

- 40 C

+ 85 C

Mic811

Reel

MCP120T-485I/TT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3353

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

3 v , 3.3 v , 5 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

350 ms

5.5 V

- 40 C

+ 85 C

Mcp120

Reel

MCP111T-450E/TT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3353

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

4.38 V

1 Input

No Manual Reset

No Watchdog

5.5 V

- 40 C

+ 125 C

Reel

MCP111T-300E/TT

Supervisor Integrated Circuit; open drain; 2,93 V; SOT23-5; 1uA

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3353

Multiples of: 3000

MCP809T-270I/TT

Supervisor Integrated Circuit; power on reset monitor (PoR)

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3353

Multiples of: 3000

2.625 V

S-80833CNMC-B8ST2G

Supervisory Circuits 3.3V 1.3uA N-Ch Open

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Ablic

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.35

Multiples of: 3000

Voltage Detectors

Smd/Smt

SOT - 23 - 5

3.3 V

1 Input

No Manual Reset

no watchdog

adjustable

10 V

- 40 C

+ 85 C

2 %

S - 808

Cut Tape

MIC803-29D3VM3 TR

Supervisory Circuits 3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset Output

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3568

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

1 Input

Open Collector / Drain

Manual Reset

No Watchdog

No Backup

15 us

5.5 V

- 40 C

+ 125 C

Mic803

Reel

ADM809LARTZ-REEL7

Supervisory Circuits 5V CMOS MPU IC Low Push/Pull Out

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Analog Devices

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.364

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.5 v , 3 v , 3.3 v , 5 v

1 Input

Push - Pull

No Manual Reset

No Watchdog

no watchdog

No Backup

840 ms

5.5 V

- 40 C

+ 125 C

Adm809

Reel

TPS3840DL29DBVR

Supervisory Circuits Nanopower high-input voltage supervisor with manual reset and programmable-reset time delay 5-SOT-23 -40 to 125

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Texas Instruments

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3759

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23

2.9 V

2 Input

Active Low, Open Drain

Manual Reset

no watchdog

Backup

6.2 s

10 V

- 40 C

+ 125 C

1 %

Tps3840

Cut Tape

STM6823MWY6F

STMicroelectronics Supervisory Circuits 4.270 to 4.490VRST WatchdogManual Inpt

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

STMicroelectronics

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3777

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

2.5 v , 3 v , 3.3 v , 5 v

1 Input

Active Low, Push - Pull

Manual Reset

Watchdog

No Backup

280 ms

5.5 V

- 40 C

+ 85 C

Stm6823

Reel

MCP121T-315E/TT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025

September 2025
	S	M	T	W	T	F	S
36	31	1	2	3	4	5	6
37	7	8	9	10	11	12	13
38	14	15	16	17	18	19	20
39	21	22	23	24	25	26	27
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11

USD 0.3836

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

3.08 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

120 ms

5.5 V

- 40 C

+ 125 C

Mcp121

Reel

MCP131T-270E/TT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Microchip

Availability : 5820
Ship by Fri. 29 Aug to Thu. 04 Sep

September 2025