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

R3111N121C-TR-FE

Supervisory Circuits Low 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.

Nisshinbo

Availability : 2904
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 0.2397

Multiples of: 1

Smd/Smt

SOT - 23 - 5

1.2 V

1 Input

Active Low, Cmos

No Manual Reset

no watchdog

No Backup

+ 85 C

R3111n

Reel

BU4922FVE-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 : 2904
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 0.2485

Multiples of: 1

Voltage Detectors

Smd/Smt

VSOF - 5

2.2 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4922fve

Cut Tape

BU4234F-TR

Supervisory Circuits LOW VOLT DETECT VOLT 3.6V

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 : 2904
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 0.2584

Multiples of: 1

Voltage Monitors

Smd/Smt

SOP - 4

3.4 V

Bu42(43)Xxf

Cut Tape

R3116N431A-TR-FE

Supervisory Circuits 0.8% Accuracy 0.5V Operating Voltage Detector with Delay Function

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 : 2904
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 0.2872

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 5

4.3 V

1 Input

Cmos, Open Drain

No Manual Reset

no watchdog

Backup

100 ms

6 V

- 40 C

+ 85 C

0.8 %

R3116n

Cut Tape

MCP112T-315E/TT

Supervisory Circuits 1uA Sup P-P Act 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 : 2904
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 0.4455

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

3.08 V

1 Input

Active Low, Push - Pull

No Manual Reset

No Watchdog

no watchdog

No Backup

5.5 V

- 40 C

+ 125 C

Mcp112

Reel

TPS3840DL37DBVRQ1

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 : 2904
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 0.4596

Multiples of: 1

Voltage Supervisory

SMD/SMT

SOT - 23 - 5

3.7 V

1 Input

Active Low, Open Drain

Manual Reset

No Watchdog

No Backup

619 ms

10 V

- 40 C

+ 125 C

1 %

Reel , Cut Tape

CAT1026WI-28-GT3

Voltage Monitor 3V/3.3V/5V 8-Pin SOIC N 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.

ON Semiconductor

Availability : 2904
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 0.6116

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOIC - 8 Wide

2 Input

Open Collector / Drain

Manual Reset

watchdog

5 us

7 V

- 40 C

+ 85 C

Cat1026

Reel

BD4944FVE-TR

Supervisory Circuits CMOS DETEC VOLT 4.7V

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 : 2903
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 0.2245

Multiples of: 1

Voltage Monitors

Smd/Smt

VSOF - 5

4.4 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

- 40 C

+ 105 C

1 %

Bd49

Reel

BD48E46G-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 : 2903
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 0.2776

Multiples of: 1

Voltage Detectors

Smd/Smt

SSOP - 5

4.6 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

BU4233FVE-TR

Supervisory Circuits LOW VOLT DETECT VOLT 3.5V

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 : 2903
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 0.3059

Multiples of: 1

Voltage Monitors

Smd/Smt

VSOF - 5

3.3 V

Bu42

Reel

NCP302LSN47T1G

Supervisory Circuits 4.7V 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 : 2902
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 0.1729

Multiples of: 1

Voltage Monitors

Smd/Smt

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

4.7 V

1 Input

Active Low, Cmos

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 125 C

2 %

Ncp302

Reel

R3111N271C-TR-FE

Supervisory Circuits Low 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.

Nisshinbo

Availability : 2902
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 0.2311

Multiples of: 1

Smd/Smt

SOT - 23 - 5

2.7 V

1 Input

Active Low, Cmos

No Manual Reset

no watchdog

No Backup

+ 85 C

R3111n

Reel

BU4811F-TR

Supervisory Circuits IC LO VOLT DETCTR CMOS 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 : 2902
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 0.2392

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

1.1 V

1 Input

Open Drain

No Manual Reset

no watchdog

No Backup

7 V

- 40 C

+ 125 C

1 %

Bu4811f

Cut Tape

BU45L472G-TL

Supervisory Circuits Volt Det IC 4.7V 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 : 2902
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

4.7 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

BU4328FVE-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 : 2901
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 0.2967

Multiples of: 1

Voltage Detectors

Smd/Smt

VSOF - 5

2.8 V

1 Input

Cmos

No Manual Reset

no watchdog

No Backup

adjustable

7 V

- 40 C

+ 125 C

1 %

Bu42(43)Xxfve

Cut Tape

MIC809TYC3-TR

Supervisory Circuits 3-Pin Microprocessor Reset Circuit with Push-Pull Active-Low Output, 3.08V Thres

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 : 2901
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 0.4502

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC70 - 3

Mic809

Cut Tape

CAT1023ZI-25-T3

Supervisory Circuits 2K bit 2.5V Ind Temp

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 : 2901
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 0.4991

Multiples of: 1

Voltage Supervisory

Smd/Smt

MSOP - 8

2.5 V

1 Input

Active High, Active Low, Open Drain

Manual Reset

watchdog

200 ms

5 v , 3.3 v , 3 V

- 40 C

+ 85 C

Cat1023

Cut Tape

MCP1319T-28LE/OT

Supervisory Circuits Active low P-P + Active high P-P MRReset delay = 200ms Vtrpd - 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.

Microchip

Availability : 2901
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 0.7762

Multiples of: 1

SOT - 23 - 5

Mcp1319

Cut Tape

CAT1023YI-28-GT3

Supervisory Circuits CPU SUP W2K EEPROM

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 : 2901
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 0.922

Multiples of: 1

Voltage Supervisory

Smd/Smt

TSSOP - 8

1 Input

Open Collector / Drain

Manual Reset

watchdog

5 us

7 V

- 40 C

+ 85 C

Cat1023

Cut Tape

MAX810T-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