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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	Number of Inputs Monitored
	Output Type
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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

MCP121T-300E/LB

Supervisory Circuits Open Drain 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.

Microchip

Availability : 32908
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.2954

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

2.93 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

MIC803-44D4VC3-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 : 32010
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 0.4251

Multiples of: 960

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1 Input

Open Collector / Drain

Manual Reset

no watchdog

No Backup

15 us

5.5 V

- 40 C

+ 125 C

Mic803

Reel

STWD100PYW83F

Supervisory Circuits Watchdog Timer 13uA Chip Enable

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 : 32010
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 0.518

Multiples of: 3000

Timers

Smd/Smt

SC - 70 - 5

5.5 V

- 40 C

+ 125 C

Stwd100

Reel

MAX803SQ438T1G

Supervisory Circuits ANA 4.38V MC 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.

ON Semiconductor

Availability : 31267
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.1909

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1.2 V To 4.9 V

1 Input

Open Collector / Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

460 ms

5.5 V

- 40 C

+ 105 C

Max803

Reel

APX803L40-30SA-7

Supervisory Circuits 3.0V 450ms Reset Generator

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.

Diodes Incorporated

Availability : 30322
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.1126

Multiples of: 1

Cut Tape

MAX809R

SOT23 Monitors & Reset Circuits ROHS

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.

TECH PUBLIC

Availability : 28853
Ship by Thu. 29 May to Tue. 03 Jun

June 2025

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

USD 0.0326

Multiples of: 10

NCV809STRG

ON Semiconductor Supervisory Circuits ANA 2.93V MCROPROC 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.

ON Semiconductor

Availability : 28473
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.2204

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

1.2 V To 4.9 V

1 Input

Active Low, Push - Pull

No Manual Reset

No Watchdog

no watchdog

No Backup

460 ms

5.5 V

- 40 C

+ 105 C

Ncv809

Aec - Q100

Reel

APX825A-29W6G-7

Supervisory Circuits 1.1V-5.5V 2.93V 20mA

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.

Diodes Incorporated

Availability : 28413
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.1573

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 26 - 6

2.93 V

1 Input

Active High, Active Low

Manual Reset

watchdog

No Backup

280 ms

5.5 V

- 40 C

+ 85 C

Apx825

Cut Tape

MIC2782FLYCS TR

Supervisory Circuits Dual Input Push Button Reset IC

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 : 28103
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.4644

Multiples of: 1

Voltage Supervisory

Smd/Smt

WLCSP - 6

2 Input

Active Low, Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

0.5 s

5.5 V

- 40 C

+ 85 C

Mic2782

Reel

MIC826SYMT-TR

Supervisory Circuits Voltage Supervisor Watchdog/Dual 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 : 27132
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.3377

Multiples of: 1

Voltage Supervisory

Smd/Smt

TDFN - 6

1.8 v to 5 V

1 Input

Active High, Active Low, Push - Pull

Manual Reset

Watchdog

watchdog

No Backup

10 us

5 V

- 40 C

+ 125 C

Mic826

Reel

CAT809RTBI-GT3

Supervisory Circuits Push-pull Act 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 : 26626
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.2035

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.5 V , 3 V , 3.3 V , 5 V

1 Input

Active Low, Push - Pull

No Manual Reset

No Watchdog

no watchdog

No Backup

240 ms

5.5 V

- 40 C

+ 85 C

Cat809

Reel

MIC2782DRYCS-TR

Supervisor Open Drain or Open Collector 2 Channel 6-WLCSP (0.8x1.2)

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 : 26395
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.4567

Multiples of: 1

Voltage Supervisory

Smd/Smt

WLCSP - 6

2 Input

Active Low, Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

2 s

5.5 V

- 40 C

+ 85 C

Mic2782

Reel

MIC6315-29D2UY-TR

Supervisory Circuits Reset Generator, Active Low, 2.93V VTH, Manual Reset, SOT-143

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 : 26190
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 0.2262

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

Reel

STM6519AHARUB6F

Supervisory Circuits 4-Pin Smart Reset IC 2V to 5.5V 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.

STMicroelectronics

Availability : 26190
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 0.4785

Multiples of: 3000

Voltage Supervisory

Smd/Smt

UDFN - 6L

1 Input

Active Low, Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

4 s

5.5 V

- 40 C

+ 85 C

Stm6519

Reel

TPS3840PL20DBVR

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 : 25446
Ship by Tue. 13 May to Thu. 15 May

May 2025

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

USD 0.3718

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

2 V

1 Input

Active Low, Open Drain

Manual Reset

no watchdog

Backup

619 ms

10 V

- 40 C

+ 125 C

1 %

Tps3840

STM1061N27WX6F

Supervisory Circuits 2.7V Active Lo Open Drain Voltage Detect

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 : 20370
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 0.226

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.7 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

No Backup

6 V

- 40 C

+ 85 C

Stm1061

Reel

MAX803SQ120T1G

Supervisory Circuits ANA 1.20V MC 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.

ON Semiconductor

Availability : 20370
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 0.3984

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1.2 v to 4.9 V

1 Input

Open Collector / Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

460 ms

5.5 V

- 40 C

+ 105 C

Max803

Reel

NCP304LSQ33T1G

ON Semiconductor Supervisory Circuits 3.3V Detector wReset 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 : 2250
Ship by Thu. 15 May to Wed. 21 May

May 2025

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

USD 11.5469

Multiples of: 1

Voltage Monitors

Smd/Smt

SC - 82AB - 4

3.3 V

1 Input

No Manual Reset

no watchdog

10 V

- 40 C

+ 85 C

2 %

Ncp304

Reel

APX803-29SAG-7

Processor Supervisor 2.93V 2.5V/3V/3.3V/5V 3-Pin SOT-23 T/R

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.

Diodes Incorporated

Availability : 921
Ship by Thu. 29 May to Tue. 03 Jun

June 2025

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

USD 0.1257

Multiples of: 5

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

4 Input

Active Low, Open Drain

No Manual Reset

no watchdog

No Backup

200 ms

5.5 V

- 40 C

+ 85 C

Apx803

Cut Tape

SP809NEK-L-3-1/TR

SP809 Series 3.1V 140ms Low Power Microprocessor Supervisory Circuit - 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.

MaxLinear

Availability : 0
Request Quote

USD 0.1984

Multiples of: 1

Voltage Supervisory