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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	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

MAX810S-HXY

SOT-23 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.

HXY MOS

Availability : 2900
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 0.0356

Multiples of: 10

HG809LM3-4.63/TR

SOT-23 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.

HGSEMI

Availability : 2900
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 0.041

Multiples of: 10

ME2807A40M3G

SOT-23 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.

Micro One

Availability : 2900
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 0.0533

Multiples of: 10

BD49L50G-TL

Supervisory Circuits Volt Det CMOS 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 : 2900
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 0.1023

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 3

5 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Cut Tape

APX803L20-15SA-7

Supervisory Circuits 1.5V, 220ms 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 : 2900
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 0.1094

Multiples of: 5

1.5 V

Leakage

APX803L20-49SA-7

Supervisory Circuits 4.9V 220ms 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 : 2900
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 0.1139

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 3

4.9 V

1 Input

Active Low, Open Drain

No Manual Reset

no watchdog

No Backup

220 ms

5.5 V

- 40 C

+ 150 C

1.5 %

Apx803l

Cut Tape

BU4927G-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 : 2900
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 0.1344

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

2.7 V

1 Input

Cmos

No Manual Reset

No Watchdog

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu49

Reel

RT9818C-25GV

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 : 2900
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 0.1485

Multiples of: 1

Voltage Detector

SMD/SMT

SOT - 23 - 3

2.5 V to 5 V

Open Drain

Manual Reset

No Watchdog

No Backup

220 ms

6 V

- 40 C

+ 85 C

1.5 %

Reel , Cut Tape

BD4945G-TR

Supervisory Circuits CMOS DETEC VOLT 4.5V

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 : 2900
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 0.1629

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

4.5 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Bd49

Reel

TPV6823V-TR

SOT-23-5 Supervisor and Reset ICs 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.

3PEAK

Availability : 2900
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 0.1832

Multiples of: 5

BD5224G-2MTR

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 : 2900
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 0.1909

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

2.4 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

55.5 ms

7 V

- 40 C

+ 105 C

2 %

Aec - Q100

Cut Tape

BU45K322G-TL

Supervisory Circuits Volt Det IC 3.2V 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.

ROHM

Availability : 2900
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 0.257

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 3

3.2 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

200 ms

6 V

- 40 C

+ 105 C

1 %

Bu45/Bu46

Cut Tape

BD49E27G-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 : 2900
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 0.2668

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.7 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

S-1002CA40I-M5T1U

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.

ABLIC

Availability : 2900
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 0.4466

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 5

4 V

1 Input

Active Low, Cmos

No Manual Reset

no watchdog

No Backup

80 us

10 V

- 40 C

+ 85 C

1 %

S - 1002

Cut Tape

S-1009N11I-N4T1U

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 : 2900
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 0.4466

Multiples of: 1

Voltage Detectors

SC - 82AB - 4

S - 1009

Cut Tape

S-1002CA18I-M5T1U

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.

Ablic

Availability : 2900
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

Smd/Smt

SOT - 23 - 5

1.8 V

1 Input

Active Low, Cmos

No Manual Reset

no watchdog

No Backup

40 us

10 V

- 40 C

+ 85 C

S - 1002

Cut Tape

BD37B46FVM-CTR

Supervisory Circuits Voltage Detector ICs with Watchdog Timer for Automotive

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 : 2900
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 0.5938

Multiples of: 1

Voltage Detector

SMD/SMT

MSOP - 8

4.6 V

1 Input

Active High, Open Drain

No Manual Reset

Watchdog

No Backup

6.9 ms

20 V

- 40 C

+ 125 C

MCP1320T-29RE/OT

Supervisory Circuits Active low Open-drain, WDI, MR (WDI = 25600ms, reset delay = 1600ms, Vtrpd - 2.9V)

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 : 2900
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 0.7523

Multiples of: 1

SOT - 23 - 5

Mcp1320

Cut Tape

TPS3808EG25DBVR

Supervisory Circuits 600nA ultra-low quie scent current superv

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 : 2900
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 0.8361

Multiples of: 1

Voltage Supervisory

SMD/SMT

SOT - 23 - 6

2.33 V

1 Input

Open Drain

Manual Reset

No Watchdog

Backup

20 ms

6 V

- 40 C

+ 125 C

1 %

TPS3808E

Reel , Cut Tape

BU4348G-TR

Supervisory Circuits CMOS LOW VOLT DETEC

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 : 2899
Ship by Fri. 14 Nov to Tue. 18 Nov

November 2025