APX809S-44SR-7 Equivalent & Substitute Parts

Part Overview

The APX809S-44SR-7 is a single-channel power management supervisor IC manufactured by Diodes Incorporated. This device functions as a reset/power-on reset controller with push-pull totem pole output configuration, designed for monitoring power supply voltages in embedded systems and industrial applications. The part is currently in active production status with 667 units available in stock. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Specification
Voltage Threshold	4.38V
Output Configuration	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C to 125°C
Package Type	SOT-23-3 (TO-236-3, SC-59)
Mounting Type	Surface Mount
Number of Voltages Monitored	1
Moisture Sensitivity Level	1 (Unlimited)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the APX809S-44SR-7 are classified as parametric equivalents based on the following criteria:

All substitute parts maintain identical electrical specifications: 4.38V voltage threshold, push-pull totem pole output, active low reset logic, and 140ms minimum reset timeout. All devices operate across the same temperature range (-40°C to 125°C) and are packaged in SOT-23-3 surface mount configuration. All substitute parts are surface mount devices with single-channel voltage monitoring capability. Compliance certifications are consistent across all parts: ROHS3 compliant, REACH unaffected, and MSL rating of 1 (unlimited). The substitution logic is based strictly on these matching parameters, which determine functional and mechanical interchangeability in circuit applications.

Parameter Comparison

Parameter	APX809S-44SR-7 (Diodes)	APX809S-44SA-7 (Diodes)	ADM809MARTZ-REEL7 (Analog Devices)	TCM809MVNB713 (Microchip)
Voltage Threshold	4.38V	4.38V	4.38V	4.38V
Output Configuration	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole
Reset Logic	Active Low	Active Low	Active Low	Active Low
Reset Timeout	140ms Minimum	140ms Minimum	140ms Minimum	140ms Minimum
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package Type	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Number of Voltages Monitored	1	1	1	1
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four parts listed—APX809S-44SR-7, APX809S-44SA-7, ADM809MARTZ-REEL7, and TCM809MVNB713—are active production devices with full ROHS3 compliance and REACH unaffected status. Selection among these parts may be based on inventory availability and supply chain considerations. The APX809S-44SA-7 (Diodes Incorporated) offers 1560 units in stock. The ADM809MARTZ-REEL7 (Analog Devices Inc.) provides the highest inventory level at 39,790 units. The TCM809MVNB713 (Microchip Technology) maintains 35,200 units in stock. All parts are suitable for direct substitution in applications requiring single-channel power supply supervision with 4.38V threshold monitoring and active-low reset output.

Frequently Asked Questions (FAQ)

Q: Can APX809S-44SA-7 be used as a direct replacement for APX809S-44SR-7?

A: Yes. Both parts are manufactured by Diodes Incorporated and share identical electrical specifications, including 4.38V voltage threshold, push-pull totem pole output, active low reset logic, 140ms minimum reset timeout, and SOT-23-3 package configuration. The parts differ only in packaging designation (SR versus SA suffix).

Q: Are the Analog Devices ADM809MARTZ-REEL7 and Microchip TCM809MVNB713 compatible with the original APX809S-44SR-7 design?

A: Yes. Both parts are parametric equivalents with matching voltage threshold (4.38V), output configuration (push-pull totem pole), reset logic (active low), reset timeout (140ms minimum), operating temperature range (-40°C to 125°C), and SOT-23-3 package type. All three manufacturers' devices are ROHS3 compliant with MSL rating of 1.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: voltage threshold (4.38V), output configuration (push-pull totem pole), reset logic (active low), reset timeout (140ms minimum), operating temperature range (-40°C to 125°C), package type (SOT-23-3), and single-channel voltage monitoring capability. All substitute parts match these specifications.

Q: Does package designation affect circuit board compatibility?

A: No. All parts use the SOT-23-3 surface mount package (also designated TO-236-3 or SC-59). Package footprint and pin configuration are identical across all substitute parts, ensuring direct board-level compatibility.

Q: Are there any compliance or certification differences among the substitute parts?

A: No. All parts maintain identical compliance status: ROHS3 compliant, REACH unaffected, MSL rating of 1 (unlimited), and active production status. Regulatory and environmental certifications are consistent across all four parts.

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