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

BU4847F-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 : 2846
Ship by Mon. 17 Nov to Wed. 19 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 0.2471

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

4.7 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4847f

Cut Tape

MCP121T-240E/LB

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 : 2846
Ship by Mon. 17 Nov to Wed. 19 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 0.3872

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

2.32 V

1 Input

No Manual Reset

no watchdog

5.5 V

- 40 C

+ 125 C

Mcp121

Reel

BD5325G-TR

Supervisory Circuits CMOS DETEC VOLT 2.5V

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 : 2845
Ship by Mon. 17 Nov to Wed. 19 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 0.1881

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

2.5 V

1 Input

Cmos

No Manual Reset

No Watchdog

no watchdog

No Backup

adjustable

10 V

- 40 C

+ 105 C

1 %

Bd53

Reel

MCP130-450I/SN

Microchip Technology Supervisory Circuits w5K Pull-Up 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 : 2845
Ship by Mon. 17 Nov to Wed. 19 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 0.4237

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOIC - 8

3 v , 3.3 v , 5 V

1 Input

Active Low, Open Drain

No Manual Reset

no watchdog

No Backup

350 ms

5.5 V

- 40 C

+ 85 C

Mcp130

Tube

BU4833FVE-TR

Supervisory Circuits VOLT DETECT .9V-4.8V 5PIN

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 : 2843
Ship by Mon. 17 Nov to Wed. 19 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 0.2257

Multiples of: 1

Voltage Detectors

Smd/Smt

VSOF - 5

3.3 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4833fve

Cut Tape

BU46K254G-TL

Supervisory Circuits Volt Det IC 2.5V CMOS

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 : 2843
Ship by Mon. 17 Nov to Wed. 19 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 0.2675

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 3

2.5 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

400 ms

6 V

- 40 C

+ 105 C

1 %

Bu45/Bu46

Cut Tape

BD53E24G-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 : 2843
Ship by Mon. 17 Nov to Wed. 19 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

2.4 V

1 Input

CMOS

No Manual Reset

No Watchdog

No Backup

Programmable

10 V

- 40 C

+ 105 C

1 %

BD53ExxG - M

AEC - Q101

Reel , Cut Tape

BD53E32G-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 : 2843
Ship by Mon. 17 Nov to Wed. 19 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

3.2 V

1 Input

CMOS

No Manual Reset

No Watchdog

No Backup

Programmable

10 V

- 40 C

+ 105 C

1 %

BD53ExxG - M

AEC - Q101

Reel , Cut Tape

APX810S05-31SA-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 : 2842
Ship by Mon. 17 Nov to Wed. 19 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

Cut Tape

BD53E29G-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 : 2842
Ship by Mon. 17 Nov to Wed. 19 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

2.9 V

1 Input

CMOS

No Manual Reset

No Watchdog

No Backup

Programmable

10 V

- 40 C

+ 105 C

1 %

BD53ExxG - M

AEC - Q101

Reel , Cut Tape

BD4948G-TR

Supervisory Circuits CMOS DETEC VOLT 4.8V

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 : 2841
Ship by Mon. 17 Nov to Wed. 19 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 0.1551

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

4.8 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Bd49

Reel

BU4934G-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 : 2841
Ship by Mon. 17 Nov to Wed. 19 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 0.1977

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

3.4 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4934g

Cut Tape

RN5VD30AA-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 : 2841
Ship by Mon. 17 Nov to Wed. 19 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

3 V

1 Input

CMOS, Open Drain

No Manual Reset

No Watchdog

Backup

10 V

- 40 C

+ 85 C

2.5 %

RN5VD

Reel , Cut Tape

BU4329FVE-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 : 2841
Ship by Mon. 17 Nov to Wed. 19 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 Detectors

Smd/Smt

VSOF - 5

2.9 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

adjustable

7 V

- 40 C

+ 125 C

1 %

Bu43

Cut Tape

S-80145CLMC-JI6T2U

Supervisory Circuits 4.5V 1.3uA CMOS Out

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 : 2841
Ship by Mon. 17 Nov to Wed. 19 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 0.4313

Multiples of: 1

Voltage Monitors

Smd/Smt

SOT - 23 - 5

4.5 V

1 Input

No Manual Reset

no watchdog

200 ms

10 V

- 40 C

+ 85 C

2 %

S - 801

Cut Tape

MIC812JUY-TR

Supervisory Circuits Microprocessor Reset Circuit with Manual Reset Push-Pull Active-High Output 4.

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 : 2841
Ship by Mon. 17 Nov to Wed. 19 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 0.5125

Multiples of: 1

Cut Tape

BD53E26G-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 : 2840
Ship by Mon. 17 Nov to Wed. 19 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

2.6 V

1 Input

CMOS

No Manual Reset

No Watchdog

No Backup

Programmable

10 V

- 40 C

+ 105 C

1 %

BD53ExxG - M

AEC - Q101

Reel , Cut Tape

APX803L05-23SA-7

Supervisory Circuits 2.3V 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 : 2839
Ship by Mon. 17 Nov to Wed. 19 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 0.1102

Multiples of: 1

Cut Tape

BU4321FVE-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 : 2837
Ship by Mon. 17 Nov to Wed. 19 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 Detectors

Smd/Smt

VSOF - 5

2.1 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

adjustable

7 V

- 40 C

+ 125 C

1 %

Bu42(43)Xxfve

Cut Tape

BD5251G-TR

Supervisory Circuits CMOS DETEC VOLT 5.1V

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 : 2836
Ship by Mon. 17 Nov to Wed. 19 Nov

November 2025