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

NCP300HSN09T1G

Supervisory Circuits 0.9V 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 : 14540
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 0.2336

Multiples of: 1

Voltage Monitors

Smd/Smt

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

0.9 V

1 Input

Active High, Cmos

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 85 C

2 %

Ncp300

Reel

PT7M3808G01TAEX

Supervisory Circuits 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 : 14464
Ship by Fri. 12 Sep to Wed. 17 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 0.4382

Multiples of: 1

Voltage Monitors

Smd/Smt

SOT - 23 - 6

0.405 V

1 Input

Open Drain

Manual Reset

no watchdog

No Backup

1.25 ms to 10 s

6.5 V

- 40 C

+ 125 C

0.5 %

Cut Tape

NCP305LSQ35T1G

Supervisory Circuits 3.5V 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 : 14174
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 0.2336

Multiples of: 1

Voltage Monitors

Smd/Smt

SC - 82AB - 4

3.5 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 85 C

2 %

Ncp305

Reel

BU4235G-TR

Volt Supervisor Detect W/Delay Circuit 0.9V to 4.8V 5-Pin SSOP 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.

ROHM

Availability : 13678
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 0.2036

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

3.5 V

Bu42

Cut Tape

MAX810S

Active High 1 SOT-23-3 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.

MSKSEMI

Availability : 13613
Ship by Fri. 12 Sep to Wed. 17 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 0.0403

Multiples of: 10

2.93 V

Push Pull

NCP304LSQ42T1G

Supervisory Circuits 4.2V 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 : 13593
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 0.2335

Multiples of: 1

Voltage Monitors

Smd/Smt

SC - 82AB - 4

4.2 V

1 Input

Active Low, Cmos

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 85 C

2 %

Ncp304

Reel

TPS3809K33DBVRG4

Supervisory Circuits 3-Pin Supply Voltage Supervisor

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 : 13558
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 0.4196

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.93 V

1 Input

Active Low, Push - Pull

No Manual Reset

No Watchdog

no watchdog

No Backup

200 ms

6 V

- 40 C

+ 85 C

Tps3809k33

Reel

NCP803SN293T3G

ON Semiconductor Supervisory Circuits 2.93V 20mA 3-Pin wuP Reset N-Channel

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 : 13556
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 0.2017

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

1.2 v to 4.9 V

1 Input

Open Collector / Drain

No Manual Reset

no watchdog

No Backup

460 ms

5.5 V

- 40 C

+ 105 C

Ncp803

Reel

MCP111T-195ILB

Microchip Technology Supervisory Circuits Open Drain

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 : 13464
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 0.2499

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1.9 V

1 Input

No Manual Reset

no watchdog

5.5 V

- 40 C

+ 85 C

Mcp111

Reel

MIC2791N-04VMT-TR

Supervisory Circuits Supervisor w/ High- Accuracy, Ultra-Fast

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 : 13273
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 1.225

Multiples of: 1

Voltage Supervisory

Smd/Smt

TDFN - 6

0.4 V

1 Input

Active Low, Push - Pull

Manual Reset

no watchdog

No Backup

1.2 s

5.5 V

- 40 C

+ 125 C

1 %

Reel

APX809S-31SA-7

Supervisory Circuits 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 : 13261
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 0.1034

Multiples of: 1

Voltage Monitors

Smd/Smt

SOT - 23 - 3

3.08 V

1 Input

Active Low, Push - Pull

No Manual Reset

no watchdog

No Backup

240 ms

5.5 V

- 40 C

+ 125 C

Apx809s/810S

Cut Tape

NCP302LSN18T1G

Supervisory Circuits 1.8V 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 : 12682
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 0.1936

Multiples of: 1

Voltage Monitors

Smd/Smt

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

1.8 V

1 Input

Active Low, Cmos

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 125 C

2 %

Ncp302

Reel

APX803-26SAG-7

Processor Supervisor 2.63V 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 : 12599
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 0.099

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

4 Input

Open Collector / Drain

200 ms

5.5 V

- 40 C

+ 85 C

Apx803

Reel

BD5231NVX-2CTL

Supervisory Circuits NANO ENERGY, 3.1V, ADJUSTABLE

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 : 12300
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 0.3823

Multiples of: 1

Voltage Detectors

SMD/SMT

SSON - 4

Open Drain

No Manual Reset

No Watchdog

No Backup

3.1 V

- 40 C

+ 125 C

2.5 %

AEC - Q100

Reel , Cut Tape

MCP100T-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 : 12253
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 0.3102

Multiples of: 1

HX61CN2202MR

SOT-23-3L 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.

HANSCHIP

Availability : 12212
Ship by Fri. 12 Sep to Wed. 17 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 0.0382

Multiples of: 10

BD5230NVX-2CTL

Supervisory Circuits NANO ENERGY, 3.0V, ADJUSTABLE

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 : 12145
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 0.3734

Multiples of: 1

Voltage Detectors

SMD/SMT

SSON - 4

Open Drain

No Manual Reset

No Watchdog

No Backup

3.1 V

- 40 C

+ 125 C

2.5 %

AEC - Q100

Reel , Cut Tape

TLV803EA29DBZR

Supervisory Circuits Low-power 3-pin voltage supervisor reset IC with active-low open-drain reset 3-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 : 12076
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 0.1576

Multiples of: 1

Cut Tape

MCP809T-475I/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 : 12055
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 0.4455

Multiples of: 1

TPS3840DL16DBVRQ1

Supervisory Circuits Automotive 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 : 11862
Ship by Wed. 27 Aug to Fri. 29 Aug

August 2025