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

CAX803STBI-T3

Processor Supervisor 2.93V 5V/3.3V/3V/2.5V 3-Pin SOT-23 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 : 23275
Ship by Fri. 04 Jul to Thu. 10 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 0.0749

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

5 V

1 Input

Active Low, Open Drain

Manual Reset

no watchdog

No Backup

20 us

5.5 V

- 40 C

+ 85 C

Cax803

Reel

TPS3420DDRYR

Texas Instruments 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 : 22578
Ship by Wed. 02 Jul to Fri. 04 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 0.5646

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

Tps3420d

Reel

NCP803SN400T1G

Supervisory Circuits 4.00V RESET 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.

ON Semiconductor

Availability : 22522
Ship by Wed. 02 Jul to Fri. 04 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 0.2068

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT23 - 3

4 V

1 Input

Open Collector / Drain

Manual Reset

No Watchdog

no watchdog

No Backup

140 ms

5.5 V

+ 105 C

Ncp803

Reel

MAX803SQ308D2T1G

Supervisory Circuits ANA 3.08V MCROPROC 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 : 21243
Ship by Wed. 02 Jul to Fri. 04 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 0.2285

Multiples of: 1

Voltage Supervisory

Smd/Smt

SC - 70 - 3

1.2 v to 4.9 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

66 ms

5.5 V

- 40 C

+ 105 C

Max803

Reel

TLV803EA26DPWR

Supervisory Circuits Low-power voltage supervisor (reset IC) with active-low open-drain output 5-X2SON -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 : 21238
Ship by Wed. 02 Jul to Fri. 04 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 0.33

Multiples of: 1

Cut Tape

SP706SEN-LTR

Microprocessor & Microcontroller Supervisors Simple Reset/Power-On Reset Active Low 2.93V SOIC-8_150mil 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.

MaxLinear

Availability : 21233
Ship by Fri. 18 Jul to Wed. 23 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 0.1835

Multiples of: 5

Voltage Supervisory

Smd/Smt

SOIC - 8 Narrow

2.93 V

1 Input

Active Low

Manual Reset

watchdog

No Backup

200 ms

5.5 V

- 40 C

+ 85 C

Sp706

Reel

MAX809REUR+T

Supervisory Circuits 3-Pin Microprocessor Reset Circuits

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.

Analog Devices

Availability : 20826
Ship by Fri. 18 Jul to Wed. 23 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 0.1978

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3L

2.5 V , 3 V , 3.3 V , 5 V

1 Input

Push - Pull

Manual Reset

No Watchdog

no watchdog

No Backup

200 ms

5.5 V

- 40 C

+ 105 C

Max809r

Reel

STM1061N27WX6F

Supervisory Circuits 2.7V Active Lo Open Drain Voltage 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.

STMicroelectronics

Availability : 20370
Ship by Fri. 04 Jul to Thu. 10 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 0.2375

Multiples of: 3000

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.7 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

No Backup

6 V

- 40 C

+ 85 C

Stm1061

Reel

CAT809LTBI-GT3

Supervisory Circuits Push-pull 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.

ON Semiconductor

Availability : 19572
Ship by Wed. 02 Jul to Fri. 04 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 0.2035

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

2.5 V , 3 V , 3.3 V , 5 V

1 Input

Active Low, Push - Pull

No Manual Reset

No Watchdog

No Backup

240 ms

5.5 V

- 40 C

+ 85 C

Cat809

Reel

MC33161DMR2G

Supervisory Circuits Universal Voltage 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.

ON Semiconductor

Availability : 19400
Ship by Fri. 04 Jul to Thu. 10 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 0.7462

Multiples of: 1

Voltage Supervisory

Smd/Smt

MSOP - 8

1.27 V

2 Input

Open Collector / Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

adjustable

40 V

- 40 C

+ 105 C

Mc33161

Reel

TCTH021BE,LF(CT

Supervisory Circuits Over Temp Detection IC IPTCO: 10uA VDET: 0.5V PTCGOOD: 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.

Toshiba

Availability : 19332
Ship by Wed. 02 Jul to Fri. 04 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 0.1698

Multiples of: 1

Voltage Detector

SMD/SMT

SOT - 553 - 5

5.5 V

1 Input

Open Drain

No Manual Reset

No Watchdog

No Backup

5.5 V

- 40 C

+ 125 C

8 %

Reel , Cut Tape

CAT823YTDI-GT3

ON Semiconductor Supervisory Circuits act low MRWD

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 : 18749
Ship by Wed. 02 Jul to Fri. 04 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 0.3374

Multiples of: 1

Voltage Supervisory

Smd/Smt

TSOT - 23 - 5

3 v , 3.3 v , 5 V

1 Input

Manual Reset

watchdog

5.5 V

- 40 C

+ 85 C

Cat823

Reel

STM6718TWWY6F

STMicroelectronics Supervisory Circuits Dual Ultra-Low Volt Push-Pull 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.

STMicroelectronics

Availability : 18731
Ship by Fri. 04 Jul to Thu. 10 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 0.4122

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 5

0.8 v to 5.5 V

2 Input

Active Low, Push - Pull

Manual Reset

no watchdog

No Backup

280 ms

5.5 V

- 40 C

+ 85 C

Stm6718

Reel

NCV301LSN28T1G

Supervisory Circuits 2.8V Detector w/N-Channel 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.

ON Semiconductor

Availability : 18697
Ship by Wed. 02 Jul to Fri. 04 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 0.1551

Multiples of: 1

Voltage Monitors

Smd/Smt

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

2.8 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

no watchdog

Backup

10 V

- 40 C

+ 125 C

2 %

Ncv301

Aec - Q100

Reel

MIC803-30D2VC3 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 : 18519
Ship by Wed. 02 Jul to Fri. 04 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 0.2431

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

MAX809J

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.

TECH PUBLIC

Availability : 18415
Ship by Fri. 18 Jul to Wed. 23 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 0.043

Multiples of: 5

MCP131T-315E/TT

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

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 : 17763
Ship by Wed. 02 Jul to Fri. 04 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 0.3707

Multiples of: 1

Voltage Supervisory

Smd/Smt

SOT - 23 - 3

3.08 V

1 Input

Active Low, Open Drain

No Manual Reset

No Watchdog

No Backup

120 ms

5.5 V

- 40 C

+ 125 C

Reel

STM811SW16F

Supervisor Push-Pull, Totem Pole 1 Channel SOT-143-4

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.

STMicroelectronics

Availability : 16679
Ship by Fri. 18 Jul to Wed. 23 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 0.1773

Multiples of: 5

Voltage Supervisory

Smd/Smt

SOT - 143 - 4

3 V , 3.3 V , 5 V

1 Input

Active Low, Push - Pull

Manual Reset

No Watchdog

No Backup

280 ms

5.5 V

- 40 C

+ 85 C

Stm811

Reel

MC34064SN-5T1G

Supervisory Circuits 4.59V UnderVoltage Sensing 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.

ON Semiconductor

Availability : 5820
Ship by Fri. 04 Jul to Thu. 10 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 0.7379

Multiples of: 1

Voltage Supervisory

Smd/Smt

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

4.6 V

1 Input

Open Collector / Drain

No Manual Reset

No Watchdog

no watchdog

No Backup

adjustable

6.5 V

0 C

+ 70 C

Mc34064

Reel

BU4240F-TR

ROHM Semiconductor Supervisory Circuits LOW VOLT DETECT VOLT 4.2V

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 : 2868
Ship by Wed. 02 Jul to Fri. 04 Jul

July 2025