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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	Threshold Voltage
	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

BU4224FVE-TR

ROHM Semiconductor Supervisory Circuits LOW VOLT DETECT VOLT 2.4V

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 : 2633
Ship by Thu. 20 Nov to Wed. 26 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 0.1852

Multiples of: 5

Voltage Monitors

Smd/Smt

VSOF - 5

2.4 V

Bu42

Reel

APX803L05-36SA-7

Supervisory Circuits 3.6V, 55ms 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 : 2632
Ship by Tue. 18 Nov to Thu. 20 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 Detectors

Smd/Smt

SOT - 23 - 3

3.6 V

1 Input

Active Low, Open Drain

No Manual Reset

no watchdog

No Backup

55 ms

5.5 V

- 40 C

+ 150 C

1.5 %

Apx803l

Cut Tape

BU4209FVE-TR

ROHM Semiconductor Supervisory Circuits LOW VOLT DETECT VOLT 1.1V

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 : 2630
Ship by Tue. 18 Nov to Thu. 20 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 0.2915

Multiples of: 1

Voltage Monitors

Smd/Smt

VSOF - 5

0.9 V

Bu42

Reel

HX7033

SOT-23 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.

hengjiaxing

Availability : 2628
Ship by Thu. 20 Nov to Wed. 26 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 0.027

Multiples of: 10

BU4315G-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 : 2628
Ship by Tue. 18 Nov to Thu. 20 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 0.2144

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

1.5 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

adjustable

7 V

- 40 C

+ 125 C

1 %

Bu43

Cut Tape

BD45401G-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 : 2625
Ship by Tue. 18 Nov to Thu. 20 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 0.3011

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

4 V

1 Input

Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

100 ms

10 V

- 40 C

+ 105 C

1 %

Bd45

Reel

BD37A19FVM-TR

Supervisory Circuits VOLT. DET. IC WWATCHDOG

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 : 2624
Ship by Tue. 18 Nov to Thu. 20 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 1.62

Multiples of: 1

Cut Tape

KTS1613EQU-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.

Kinetic Technologies

Availability : 2623
Ship by Tue. 18 Nov to Thu. 20 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 0.3465

Multiples of: 1

Voltage Monitors

Smd/Smt

UQFN - 10

2 Input

Active High, Active Low, Open Drain, Push - Pull

Manual Reset

no watchdog

No Backup

10 s

5.5 V

- 40 C

+ 85 C

Cut Tape

MCP1316MT-29ME/OT

Supervisory Circuits ACTIVE LO OPEN DRAIN W/INT 4.7K PULL UP

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 : 2623
Ship by Tue. 18 Nov to Thu. 20 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 0.5112

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

2.9 V

1 Input

Open Collector / Drain

Manual Reset

Watchdog

watchdog

No Backup

200 ms

5.5 V

+ 125 C

Mcp131

Reel

BU4231F-TR

ROHM Semiconductor Supervisory Circuits LOW VOLT DETECT VOLT 3.3V

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 : 2621
Ship by Thu. 20 Nov to Wed. 26 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 0.1915

Multiples of: 1

Voltage Monitors

Smd/Smt

SOP - 4

3.1 V

Bu42

Reel

BU4816FVE-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 : 2620
Ship by Tue. 18 Nov to Thu. 20 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 0.2753

Multiples of: 1

Voltage Detectors

Smd/Smt

VSOF - 5

1.6 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4816fve

Cut Tape

BD4845G-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 : 2619
Ship by Thu. 20 Nov to Wed. 26 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 0.0945

Multiples of: 5

Voltage Monitors

Smd/Smt

SSOP - 5

4.5 V

1 Input

Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

10 V

- 40 C

+ 105 C

1 %

Bd48

Reel

BD5328G-TR

Supervisory Circuits CMOS DETEC VOLT 2.8V

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 : 2619
Ship by Tue. 18 Nov to Thu. 20 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 0.1917

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

2.8 V

1 Input

Cmos

No Manual Reset

No Watchdog

no watchdog

No Backup

adjustable

10 V

- 40 C

+ 105 C

1 %

Bd53

Reel

BU4219FVE-TR

Supervisory Circuits LOW VOLT DETECT VOLT 2.1V

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 : 2618
Ship by Tue. 18 Nov to Thu. 20 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 0.2967

Multiples of: 1

Voltage Monitors

Smd/Smt

VSOF - 5

1.9 V

Bu42

Cut Tape

R3132Q47EA-TR-FE

Supervisory Circuits Low Voltage Detector with output delay (internal counter type)

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.

Nisshinbo

Availability : 2618
Ship by Tue. 18 Nov to Thu. 20 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 0.2992

Multiples of: 1

Voltage Detectors

Smd/Smt

SC - 82AB - 4

4.7 V

1 Input

Cmos, Open Drain

Manual Reset

no watchdog

Backup

240 ms

6 V

- 40 C

+ 85 C

2 %

R3132q

Reel

BD52E23G-MTR

Supervisory Circuits VOLTAGE DETECTOR WADJ DELAY

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 : 2616
Ship by Tue. 18 Nov to Thu. 20 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 0.2911

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

2.3 V

1 Input

Open Drain

No Manual Reset

No Watchdog

No Backup

Programmable

10 V

- 40 C

+ 105 C

1 %

BD52ExxG - M

AEC - Q101

Reel , Cut Tape

BU4910F-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 : 2614
Ship by Tue. 18 Nov to Thu. 20 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 0.2303

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

1 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4910f

Cut Tape

RN5VD09AA-TR-FE

Supervisory Circuits Low Voltage Detector w/output delay

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.

Nisshinbo

Availability : 2614
Ship by Tue. 18 Nov to Thu. 20 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 0.2625

Multiples of: 1

Voltage Detector

SMD/SMT

SOT - 23 - 5

900 mV

1 Input

CMOS, Open Drain

No Manual Reset

No Watchdog

Backup

10 V

- 40 C

+ 85 C

2.5 %

RN5VD

Reel , Cut Tape

NCV803SQ308D2T1G

Supervisory Circuits Voltage Supervisor, Very Low Supply Current, 3-Pin Microprocessor, Reset Monitor AUTO 3.08V VTH UP 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 : 2611
Ship by Tue. 18 Nov to Thu. 20 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 0.1627

Multiples of: 1

Voltage Detector

SMD/SMT

SC - 70 - 3

CMOS

No Manual Reset

Backup

5.5 V

- 40 C

+ 125 C

MAX803

Reel , Cut Tape

APX803L20-35C3-7

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 : 2610
Ship by Tue. 18 Nov to Thu. 20 Nov

November 2025