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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	Type
	Mounting Style
	Output Voltage
	Package / Case
	Threshold Voltage
	Number of Inputs Monitored
	Output Type
	Manual Reset
	Watchdog
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	Battery Backup Switching
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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

MCP120T-300I/TT

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 : 55290
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.3188

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

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 Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

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

NCP305LSQ15T1G

Supervisory Circuits 1.5V 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 : 28101
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2335

Multiples of: 1

Voltage Monitors

Smd/Smt

SC - 82AB - 4

1.5 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 85 C

2 %

Ncp305

Reel

NCP302LSN15T1G

Supervisory Circuits 1.5V 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 : 27804
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2336

Multiples of: 1

Voltage Monitors

Smd/Smt

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

1.5 V

1 Input

Active Low, Cmos

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 125 C

2 %

Ncp302

Reel

RNA51957BFP#H0

Processor Supervisor 0.67V 1.2V to 1.3V 8-Pin SOP 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.

Renesas

Availability : 27225
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.842

Multiples of: 1

Surface Mount

SOP - 8

Yes

17 V

Tape And 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 Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

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

NCP308SN300T1G

Supervisory Circuits Voltage Supervisor, Ultra Low Quiescent Current, Programmable Delay Time

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 : 26135
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.4974

Multiples of: 1

Voltage Supervisory

Ncp308

Reel

APX803S05-29SA-7

Supervisory Circuits 2.93V 50ms MPU Reset Circuit

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 : 25112
Ship by Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

USD 0.0935

Multiples of: 1

Cut Tape

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 : 24880
Ship by Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

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

NCV302HSN45T1G

Supervisory Circuits ANA UNDERVOLT 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.

ON Semiconductor

Availability : 23977
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.31

Multiples of: 1

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 : 23538
Ship by Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

USD 0.2024

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

NCP301HSN22T1G

Supervisory Circuits 2.2V Detector w/Reset High

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 : 23328
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2336

Multiples of: 1

Voltage Monitors

Smd/Smt

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

2.2 V

1 Input

Active High, Open Drain

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 125 C

2 %

Ncp301

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 : 23280
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.6319

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

CAX803STBI-T3

Processor Supervisor 2.93V 5V/3.3V/3V/2.5V 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.

ON Semiconductor

Availability : 23275
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.0725

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

5 V

1 Input

Active Low, Open Drain

Manual Reset

no watchdog

No Backup

20 us

5.5 V

- 40 C

+ 85 C

Cax803

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 : 22784
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2393

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

MAX811TEUS+T

Supervisory Circuits 4-Pin uP Voltage Monitors with Manual Reset Input

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 : 22226
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025

November 2025
	S	M	T	W	T	F	S
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8
46	9	10	11	12	13	14	15
47	16	17	18	19	20	21	22
48	23	24	25	26	27	28	29
49	30	1	2	3	4	5	6

USD 0.2554

Multiples of: 1

3.08 V

NCP803SN400T1G

Supervisory Circuits 4.00V RESET MONITOR

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 : 21491
Ship by Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

USD 0.209

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT23 - 3

4 V

1 Input

Open Collector / Drain

Manual Reset

No Watchdog

no watchdog

No Backup

140 ms

5.5 V

+ 105 C

Ncp803

Reel

MAX803SQ308D2T1G

Supervisory Circuits ANA 3.08V 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 : 21243
Ship by Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

USD 0.2285

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1.2 v to 4.9 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

66 ms

5.5 V

- 40 C

+ 105 C

Max803

Reel

TLV803EA26DPWR

Supervisory Circuits Low-power voltage supervisor (reset IC) with active-low open-drain output 5-X2SON -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 : 21238
Ship by Mon. 27 Oct to Wed. 29 Oct

October 2025

October 2025
	S	M	T	W	T	F	S
40	28	29	30	1	2	3	4
41	5	6	7	8	9	10	11
42	12	13	14	15	16	17	18
43	19	20	21	22	23	24	25
44	26	27	28	29	30	31	1
45	2	3	4	5	6	7	8

USD 0.33

Multiples of: 1

Cut Tape

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 : 20370
Ship by Wed. 29 Oct to Tue. 04 Nov

November 2025