NCV809STRG Equivalent & Substitute Parts

Part Overview

The NCV809STRG is a single-channel power management supervisor IC manufactured by onsemi, designed for power-on reset and simple reset applications. This device features push-pull totem pole output configuration in a compact SOT-23-3 surface mount package. The NCV809STRG is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical or superior electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value
Manufacturer Part Number	NCV809STRG
Manufacturer	onsemi
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.93V
Output Configuration	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 125°C (TA)
Grade	Automotive
Qualification	AEC-Q100
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the NCV809STRG is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage threshold: 2.93V
Output configuration: Push-Pull, Totem Pole
Reset logic: Active Low
Number of voltages monitored: 1
Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting type: Surface Mount
Reset timeout: 140ms minimum (primary specification)
Operating temperature range: -40°C to 125°C (preferred) or -40°C to 85°C (acceptable with thermal derating consideration)
Compliance: ROHS3, REACH Unaffected, AEC-Q100 qualification

Substitute parts are categorized as follows:

MFR Recommended: Direct onsemi replacement with active product status and identical electrical specifications.

Similar Manufacturer Parts: Alternative manufacturer devices meeting all mandatory parameters with active product status.

Parametric Equivalents: Devices from multiple manufacturers with full parameter alignment and extended availability.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout	Operating Temp Range	Package	Product Status	Inventory (Pcs)
NCV809STRG	onsemi	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Obsolete	21,660
NCV809SN293D2T1G	onsemi	2.93V	Push-Pull, Totem Pole	20ms Min	-40°C ~ 125°C	SOT-23-3	Active	10,123
ADM6326-29ARTZ-R7	Analog Devices Inc.	2.93V	Push-Pull, Totem Pole	100ms Min	-40°C ~ 85°C	SOT-23-3	Active	13,603
STM809SWX6F	STMicroelectronics	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	15,257
TCM809SENB713	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	44,991
ADM809SARTZ-REEL7	Analog Devices Inc.	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	117,504
APX809S-29SA-7	Diodes Incorporated	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	12,100
APX809S-29SR-7	Diodes Incorporated	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	2,307
TC1272ASVNBTR	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	705
TCM809SVNB713	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	5,119

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: NCV809SN293D2T1G (onsemi) is the manufacturer-recommended direct replacement. This part maintains onsemi manufacturing continuity, identical package configuration, and active product status. The reset timeout of 20ms minimum is shorter than the original 140ms specification, providing faster response characteristics suitable for power management applications.

Recommended Parametric Equivalents: For applications requiring full parameter alignment with the original NCV809STRG specification, the following parts provide complete electrical and thermal equivalence with extended product lifecycle assurance:

ADM809SARTZ-REEL7 (Analog Devices Inc.): Highest inventory availability (117,504 units), full temperature range (-40°C to 125°C), 140ms reset timeout, AEC-Q100 qualified, ROHS3 compliant.
APX809S-29SA-7 or APX809S-29SR-7 (Diodes Incorporated): Full parameter equivalence, -40°C to 125°C operating range, 140ms reset timeout, active product status.
TCM809SVNB713 (Microchip Technology): Complete specification match, 140ms reset timeout, -40°C to 125°C range, AEC-Q100 qualified.

Alternative Selections for Thermal-Constrained Applications: STM809SWX6F (STMicroelectronics) and TCM809SENB713 (Microchip Technology) are suitable for applications where operating temperature does not exceed 85°C. Both maintain 140ms reset timeout and full electrical equivalence.

Consideration for Temperature-Limited Designs: ADM6326-29ARTZ-R7 (Analog Devices Inc.) operates within -40°C to 85°C range with 100ms reset timeout. This part is suitable for applications where the extended reset timeout does not impact system performance.

All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and AEC-Q100 automotive qualification consistent with the original part specification.

Frequently Asked Questions (FAQ)

Q: Can NCV809SN293D2T1G replace NCV809STRG in all applications? A: NCV809SN293D2T1G is the onsemi manufacturer-recommended replacement with identical electrical specifications except for reset timeout (20ms vs. 140ms). The shorter reset timeout is functionally superior for power management applications. Verify that your system design does not require the extended 140ms timeout specification before substitution.

Q: What is the difference between reset timeout specifications? A: Reset timeout defines the minimum duration the reset output remains asserted after the supply voltage crosses the threshold. The original NCV809STRG specifies 140ms minimum. Shorter timeouts (20ms, 100ms) provide faster system recovery. Longer or equal timeouts ensure adequate reset pulse width for slower microcontroller startup sequences. Select based on your system's reset pulse width requirement.

Q: Are all substitute parts AEC-Q100 qualified? A: All listed substitute parts carry AEC-Q100 automotive qualification, matching the original NCV809STRG specification. This qualification is maintained across all recommended alternatives.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging? A: Both are surface mount tape formats suitable for automated assembly. Cut Tape & Digi-Reel® provides flexibility for lower-volume applications. Tape & Reel (TR) is optimized for high-volume production runs. Electrical performance is identical; selection depends on procurement volume and assembly equipment compatibility.

Q: Can I use parts with -40°C to 85°C operating range instead of -40°C to 125°C? A: Parts rated to 85°C maximum are suitable for applications where the actual operating temperature remains below 85°C. Verify your system's thermal environment and derating requirements. For automotive applications with potential high-temperature exposure, parts rated to 125°C provide additional thermal margin.

Q: Are all substitute parts ROHS3 compliant? A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original NCV809STRG environmental compliance status.

Q: Which substitute offers the best inventory availability? A: ADM809SARTZ-REEL7 (Analog Devices Inc.) provides the highest inventory availability at 117,504 units, combined with full parameter equivalence to the original specification including -40°C to 125°C operating range and 140ms reset timeout.

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