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

BU4220G-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 : 13467
Ship by Thu. 03 Jul to Mon. 07 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 0.1977

Multiples of: 1

Voltage Monitors

Smd/Smt

SSOP - 5

2 V

1 Input

Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

adjustable

7 V

- 40 C

+ 125 C

1 %

Bu42

Reel

MCP111T-195ILB

Microchip Technology Supervisory Circuits 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.

Microchip

Availability : 13464
Ship by Thu. 03 Jul to Mon. 07 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 0.2499

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1.9 V

1 Input

No Manual Reset

no watchdog

5.5 V

- 40 C

+ 85 C

Mcp111

Reel

MIC2791N-04VMT-TR

Supervisory Circuits Supervisor w/ High- Accuracy, Ultra-Fast

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 : 13273
Ship by Thu. 03 Jul to Mon. 07 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 1.225

Multiples of: 1

Voltage Supervisory

Smd/Smt

TDFN - 6

0.4 V

1 Input

Active Low, Push - Pull

Manual Reset

no watchdog

No Backup

1.2 s

5.5 V

- 40 C

+ 125 C

1 %

Reel

TPS3421ECDRYR

Supervisory Circuits Dual CH Push Button Cntlr

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 : 12980
Ship by Thu. 03 Jul to Mon. 07 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 0.5736

Multiples of: 1

Voltage Supervisory

Smd/Smt

USON - 6

2 Input

Active Low, Open Drain

Manual Reset

no watchdog

No Backup

150 us

6.5 V

- 40 C

+ 125 C

Tps3421ec

Reel

MCP100T-450I/TT

Supervisor Integrated Circuit; power on reset monitor (PoR)

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 : 12805
Ship by Thu. 03 Jul to Mon. 07 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 0.3102

Multiples of: 1

NCP302LSN18T1G

Supervisory Circuits 1.8V 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 : 12682
Ship by Thu. 03 Jul to Mon. 07 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 0.1936

Multiples of: 1

Voltage Monitors

Smd/Smt

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

1.8 V

1 Input

Active Low, Cmos

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 125 C

2 %

Ncp302

Reel

BD5231NVX-2CTL

Supervisory Circuits NANO ENERGY, 3.1V, ADJUSTABLE

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 : 12300
Ship by Thu. 03 Jul to Mon. 07 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 0.3823

Multiples of: 1

Voltage Detectors

SMD/SMT

SSON - 4

Open Drain

No Manual Reset

No Watchdog

No Backup

3.1 V

- 40 C

+ 125 C

2.5 %

AEC - Q100

Reel , Cut Tape

TPS3895PDRYR

Texas Instruments 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 : 12299
Ship by Thu. 03 Jul to Mon. 07 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 0.3795

Multiples of: 1

Voltage Supervisory

Smd/Smt

USON - 6

Adj

1 Input

Active High, Push - Pull

Manual Reset

no watchdog

No Backup

190 ms

6.5 V

- 40 C

+ 125 C

1 %

Tps3895

Reel

HX61CN2202MR

SOT-23-3L 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.

HANSCHIP

Availability : 12212
Ship by Mon. 21 Jul to Thu. 24 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 0.0382

Multiples of: 10

MIC2779L-2YM5-TR

Supervisory Circuits V-Supervisor w/Adj. Hysteresis, Active-High 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 : 12182
Ship by Thu. 03 Jul to Mon. 07 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 1.0486

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23

Reel

BD5230NVX-2CTL

Supervisory Circuits NANO ENERGY, 3.0V, ADJUSTABLE

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 : 12145
Ship by Thu. 03 Jul to Mon. 07 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 0.3734

Multiples of: 1

Voltage Detectors

SMD/SMT

SSON - 4

Open Drain

No Manual Reset

No Watchdog

No Backup

3.1 V

- 40 C

+ 125 C

2.5 %

AEC - Q100

Reel , Cut Tape

MCP809T-475I/TT

Supervisor Integrated Circuit; power on reset monitor (PoR)

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 : 12129
Ship by Thu. 03 Jul to Mon. 07 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 0.3289

Multiples of: 1

TLV803EA29DBZR

Supervisory Circuits Low-power 3-pin voltage supervisor reset IC with active-low open-drain reset 3-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 : 12076
Ship by Thu. 03 Jul to Mon. 07 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 0.1576

Multiples of: 1

Cut Tape

APX803L20-42SA-7

Supervisory Circuits 4.2V, 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 : 11992
Ship by Thu. 03 Jul to Mon. 07 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 0.0935

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 3

4.2 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

APX809S05-29SA-7

Supervisory Circuits 3-pin MPU Power 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.

Diodes Incorporated

Availability : 11989
Ship by Thu. 03 Jul to Mon. 07 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 0.0902

Multiples of: 1

Voltage Detectors

Smd/Smt

SOT - 23 - 3

2.93 V

1 Input

Active Low, Push - Pull

No Manual Reset

no watchdog

No Backup

50 ms

5.5 V

- 40 C

+ 125 C

Apx809s/810S

Cut Tape

TPS3840DL16DBVRQ1

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 : 11985
Ship by Thu. 03 Jul to Mon. 07 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 0.4895

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

1.6 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

TPS3620-33DGKT

Supervisory Circuits 3.3-V Battery-Backup for RAM Retention

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 : 11855
Ship by Thu. 03 Jul to Mon. 07 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 2.3517

Multiples of: 1

Voltage Supervisory

Smd/Smt

MSOP - 8

3.3 v , 5 V

1 Input

Push - Pull

Manual Reset

No Watchdog

no watchdog

Backup

100 ms

5.5 V

- 40 C

+ 85 C

Tps3620 - 33

Reel

NCP308SN180T1G

Processor Supervisor 1.67V 1.8V 6-Pin TSOP 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 : 11754
Ship by Mon. 21 Jul to Thu. 24 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 0.3013

Multiples of: 1

Voltage Detectors

Ncp308

Reel

MIC803-31D3VC3 TR

Supervisory Circuits 3-Pin Microprocessor Supervisor Circuit w/ Open-Drain Reset 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 : 8694
Ship by Thu. 03 Jul to Mon. 07 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 0.2486

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1 Input

Open Collector / Drain

Manual Reset

No Watchdog

No Backup

15 us

5.5 V

- 40 C

+ 125 C

Mic803

Reel

TPS3824-33DBVR

Supervisory Circuits 2.93V Monitor

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 : 119
Ship by Mon. 21 Jul to Thu. 24 Jul

July 2025