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

RT9818C-29GVL

Supervisory Circuits Micro-Power Voltage Detectors

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.

Richtek

Availability : 2856
Ship by Fri. 14 Nov to Tue. 18 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 0.149

Multiples of: 1

Voltage Detector

SMD/SMT

SOT - 23 - 3

2.9 V

Open Drain

Manual Reset

No Watchdog

No Backup

220 ms

6 V

- 40 C

+ 85 C

1.5 %

Reel , Cut Tape

BU4917F-TR

Volt Supervisor Detect 0.9V to 4.8V 4-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.

ROHM

Availability : 2856
Ship by Tue. 18 Nov to Mon. 24 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 0.1684

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

1.7 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4917f

Reel

S-1009C46I-M5T1U

Supervisory Circuits VOLTAGE DETECTOR ULTRA LOW IQ

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 : 2856
Ship by Fri. 14 Nov to Tue. 18 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 0.4653

Multiples of: 1

Voltage Detectors

SOT - 23 - 5

S - 1009

Cut Tape

MIC705MY

Supervisory Circuits P Supervisor, Watchdog Timer, Active-Low, 4.65V VTH, SOIC-08 (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 : 2856
Ship by Fri. 14 Nov to Tue. 18 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 0.8978

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOIC - 8

4.65 V , 4.4 V

1 Input

Active High, Active Low

Manual Reset

Watchdog

Backup

250 ns

5.5 V

- 40 C

+ 85 C

Mic705

Tube

TPS3850H12QDRCRQ1

Supervisory Circuits Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay 10-VSON -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 : 2856
Ship by Fri. 14 Nov to Tue. 18 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 1.4296

Multiples of: 1

Voltage Supervisory

Smd/Smt

VSON - 10

1.2 V

1 Input

Active - Low,Open - Drain

No Manual Reset

watchdog

No Backup

programmable

6.5 V

- 40 C

+ 125 C

0.8 %

Tps3850 - Q1

Aec - Q100

Cut Tape

NCP301LSN11T1G

Supervisory Circuits 1.1V 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.

ON Semiconductor

Availability : 2855
Ship by Fri. 14 Nov to Tue. 18 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 0.1978

Multiples of: 1

Voltage Monitors

Smd/Smt

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

1.1 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 85 C

2 %

Ncp301

Reel

BU4228F-TR

Supervisory Circuits LOW VOLT DETECT VOLT 3.0V

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 : 2855
Ship by Fri. 14 Nov to Tue. 18 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 0.2838

Multiples of: 1

Voltage Monitors

Smd/Smt

SOP - 4

2.8 V

Bu42

Reel

BD45251G-TR

Supervisor Open Drain or Open Collector 1 Channel 5-SSOP

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 : 2855
Ship by Fri. 14 Nov to Tue. 18 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 0.3069

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

2.5 V

1 Input

Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

100 ms

10 V

- 40 C

+ 105 C

1 %

Bd45

Reel

STM6718TZWY6F

Supervisory Circuits Dual triple ultra Lo Vltg 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.

STMicroelectronics

Availability : 2855
Ship by Fri. 14 Nov to Tue. 18 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 0.6424

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

0.8 v to 5.5 V

2 Input

Active Low, Push - Pull

Manual Reset

No Watchdog

No Backup

280 ms

5.5 V

- 40 C

+ 85 C

Stm6718

Reel

APX809S00-46SR-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 : 2854
Ship by Fri. 14 Nov to Tue. 18 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 0.1034

Multiples of: 1

Voltage Monitors

Smd/Smt

SOT - 23 - 3

4.63 V

1 Input

Active Low, Push - Pull

No Manual Reset

no watchdog

No Backup

1.7 ms

5.5 V

- 40 C

+ 125 C

Apx809s/810S

Cut Tape

BD5232G-TR

ROHM Semiconductor Supervisory Circuits CMOS DETEC VOLT 3.2V

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 : 2851
Ship by Tue. 18 Nov to Mon. 24 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 0.1426

Multiples of: 5

Voltage Monitors

Smd/Smt

SSOP - 5

3.2 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

programmable

10 V

- 40 C

+ 105 C

1 %

Bd52

Reel

BD48E31G-MTR

Supervisor Open Drain or Open Collector 1 Channel 5-SSOP

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 : 2851
Ship by Fri. 14 Nov to Tue. 18 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 0.2861

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

3.1 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

100 us

10 V

- 40 C

+ 105 C

1 %

Aec - Q101

Cut Tape

MIC6315-44D4UY-TR

Supervisory Circuits Reset Generator, Active Low, 4.38V 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 : 2851
Ship by Fri. 14 Nov to Tue. 18 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 0.4188

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

Reel

BU4813F-TR

Supervisory Circuits IC CMOS VOLT 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.

ROHM

Availability : 2850
Ship by Fri. 14 Nov to Tue. 18 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 0.2437

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

1.3 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4813f

Cut Tape

BU4214F-TR

Supervisory Circuits LOW VOLT DETECT VOLT 1.6V

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 : 2850
Ship by Fri. 14 Nov to Tue. 18 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 0.2664

Multiples of: 1

Voltage Monitors

Smd/Smt

SOP - 4

1.4 V

Bu42

Cut Tape

TPS3808G33DBVTG4

Texas Instruments Supervisory Circuits Programmable-Delay Supervisory

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 : 2850
Ship by Fri. 14 Nov to Tue. 18 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 0.9512

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 6

3.07 V

1 Input

Active Low, Open Drain

Manual Reset

no watchdog

No Backup

300 ms

6.5 V

- 40 C

+ 125 C

0.5 %

Tps3808g33

Reel

BD48L55G-TL

Supervisory Circuits Volt Det Open drain 5.5V SSOP3

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 : 2849
Ship by Fri. 14 Nov to Tue. 18 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 0.1155

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 3

5.5 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Cut Tape

BD46315G-TR

Supervisory Circuits RESET DETEC VOLT 3.2V

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 : 2849
Ship by Tue. 18 Nov to Mon. 24 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 0.2429

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

3.2 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Bd46

Reel

BD49E46G-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 : 2847
Ship by Fri. 14 Nov to Tue. 18 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 0.2784

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

4.6 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

BD4941G-TR

ROHM Semiconductor Supervisory Circuits CMOS DETEC VOLT 4.1V

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 : 2846
Ship by Fri. 14 Nov to Tue. 18 Nov

November 2025