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

CAT1021LI-30-G

Voltage Monitor 3V/3.3V/5V 8-Pin PDIP Rail

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 : 3734
Ship by Wed. 09 Jul to Tue. 15 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 1.0876

Multiples of: 1

Voltage Supervisory

Through Hole

PDIP - 8

3 v , 3.3 v , 5 V

1 Input

Manual Reset

watchdog

5.5 V

- 40 C

+ 85 C

Cat1021

Tube

MIC2774N-44YM5-TR

Supervisory Circuits Dual Voltage Supervisor with 0.3V and 4.43V Thresholds, Active-Low Open-Drain Ou

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 : 3722
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.7436

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23

Reel

BU4224F-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 : 3709
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.2664

Multiples of: 1

Voltage Detectors

Smd/Smt

SOP - 4

2.4 V

1 Input

7 V

- 40 C

+ 125 C

1 %

Bu42

Reel

TPS3808G33DRVR

Supervisory Circuits Low Quies Crnt,Prog Delay Super Circuit

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 : 3696
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.768

Multiples of: 1

Voltage Supervisory

Smd/Smt

WSON - 6

3.3 V

1 Input

Active - Low,Open - Drain

Manual Reset

no watchdog

20 ms

6.5 V

- 40 C

+ 125 C

0.5 %

Tps3808g33

Reel

MCP1320T-29FE/OT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-5

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 : 3681
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.7425

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

2 v to 4.7 V

1 Input

Active Low, Open Drain

Manual Reset

Watchdog

watchdog

No Backup

2240 ms

5.5 V

- 40 C

+ 125 C

Mcp1320

Reel

MIC826MYMT-TR

Supervisory Circuits Voltage Supervisor Watchdog/Dual Output

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 : 3676
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.3397

Multiples of: 1

Voltage Supervisory

Smd/Smt

TDFN - 6

1.8 v to 5 V

1 Input

Active High, Active Low, Push - Pull

Manual Reset

Watchdog

watchdog

No Backup

10 us

5 V

- 40 C

+ 125 C

Mic826

Reel

TPS3840DL28DBVRQ1

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 : 3673
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.4378

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

2.8 V

1 Input

Active Low, Open Drain

Manual Reset

no watchdog

Backup

619 ms

10 V

- 40 C

+ 125 C

1 %

Tps3840

Aec - Q100

Cut Tape

TPS3831G18DQNR

Supervisory Circuits Ultra-Lo 150nA Ultra Sm Vtg 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.

Texas Instruments

Availability : 3668
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.4319

Multiples of: 1

Voltage Supervisory

Smd/Smt

X2SON - 4

1.8 V

1 Input

Push - Pull

Manual Reset

no watchdog

Backup

200 ms

6.5 V

- 40 C

+ 85 C

Tps3831g18

Reel

APX803L05-29W-7

Supervisory Circuits 2.9V, 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 : 3667
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.1369

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 59 - 3

2.9 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

S-80828CNMC-B8NT2U

Supervisory Circuits 2.8V 1.3uA N-Ch Open

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 : 3653
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.4398

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 5

2.8 V

1 Input

No Manual Reset

no watchdog

adjustable

10 V

- 40 C

+ 85 C

2 %

S - 808

Cut Tape

TPS3850H50DRCR

Supervisory Circuits Precision 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 : 3652
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 1.0285

Multiples of: 1

Voltage Supervisory

Smd/Smt

VSON - 10

Adj , 1.11 v , 1.15 v , 1.67 v , 1.72 v , 2.79 v , 2.88 v , 3.06 v , 3.16 v , 1.15 v , 4.8 v

1 Input

Active - Low,Open - Drain

No Manual Reset

watchdog

No Backup

programmable

6.5 V

- 40 C

+ 125 C

0.8 %

Tps3850

Cut Tape

TPS3897ADRYT

Supervisory Circuits Sgl Ch,Ultra Small, Adj Sup Circuit

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 : 3649
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.8734

Multiples of: 1

Voltage Supervisory

Smd/Smt

SON - 6

Adj

1 Input

Active High, Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

190 ms

6.5 V

- 40 C

+ 125 C

1 %

Tps3897

Reel

BU4219G-TR

ROHM Semiconductor 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 : 3647
Ship by Wed. 23 Jul to Mon. 28 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.1258

Multiples of: 5

Voltage Monitors

Smd/Smt

SSOP - 5

1.9 V

Bu42

Reel

MIC6315-31D3UY TR

Supervisory Circuits Reset Generator, Active Low,4.63V VTH, Manual Reset, SOT-145 - 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 : 3644
Ship by Wed. 09 Jul to Tue. 15 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.3366

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

3 V , 3.3 V , 5 V

1 Input

Active Low, Open Drain

Manual Reset

No Watchdog

No Backup

0.5 us

5.5 V

- 40 C

+ 85 C

Mic6315

Reel

MIC2778-2YM5-TR

Supervisory Circuits V-Supervisor w/Adj. Hysteresis, Open-Drain Ouput, 2% Accuracy

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 : 3644
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.9306

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23

Reel

BD49E30G-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 : 3643
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.29

Multiples of: 1

Voltage Detectors

SMD/SMT

SSOP - 5

3 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

TPS3840PL16DBVR

Supervisory Circuits Nanopower 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 : 3643
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.384

Multiples of: 1

Cut Tape

TL7705ACDE4

Supervisory Circuits Sngl SVS f/5V System w/Prg Time 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.

Texas Instruments

Availability : 3637
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 2.3382

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOIC - 8

4.55 V

1 Input

Active High, Active Low, Open Drain

Manual Reset

No Watchdog

no watchdog

No Backup

programmable

18 V

0 C

+ 70 C

Tl7705a

Tube

KP4213ESGA

ESOP-8 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.

KIWI

Availability : 3631
Ship by Wed. 23 Jul to Mon. 28 Jul

July 2025

July 2025
	S	M	T	W	T	F	S
27	29	30	1	2	3	4	5
28	6	7	8	9	10	11	12
29	13	14	15	16	17	18	19
30	20	21	22	23	24	25	26
31	27	28	29	30	31	1	2
32	3	4	5	6	7	8	9

USD 0.162

Multiples of: 5

MCP121T-450ELB

Microchip Technology 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 : 3627
Ship by Mon. 07 Jul to Wed. 09 Jul

July 2025