MIC809TYC3 Equivalent & Substitute Parts

Part Overview

The MIC809TYC3 is a single-channel power management supervisor integrated circuit manufactured by Microchip Technology. This device functions as a reset/power-on reset circuit with push-pull totem pole output configuration, designed for monitoring power supply voltages in embedded systems and microprocessor applications. The MIC809TYC3 is classified as obsolete, necessitating identification of active equivalent and substitute components to maintain design continuity and ensure long-term supply chain reliability. Substitute parts must maintain electrical compatibility across voltage threshold, output configuration, reset timing, and operating temperature specifications.

Substiute Parts

MIC809TYC3

Microchip TechnologyIn Stock: 824MIC809TYC3 Datasheet

Current PartRFQ

TCM809TENB713

Microchip TechnologyIn Stock: 35374TCM809TENB713 Datasheet

MFR RecommendedRFQ

TCM809TVLB713

Microchip TechnologyIn Stock: 5135TCM809TVLB713 Datasheet

MFR RecommendedRFQ

TCM809TVNB713

Microchip TechnologyIn Stock: 21762TCM809TVNB713 Datasheet

MFR RecommendedRFQ

MAX6326XR31+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1322MAX6326XR31+T Datasheet

MFR RecommendedRFQ

MAX6381XR31D2+T

Analog Devices Inc./Maxim IntegratedIn Stock: 749MAX6381XR31D2+T Datasheet

MFR RecommendedRFQ

MAX809TEXR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3498MAX809TEXR+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC809TYC3 are qualified based on the following critical parameters that determine functional equivalence:

Electrical Compatibility Criteria:

• Voltage threshold: 3.08V (exact match required)
• Output configuration: Push-Pull, Totem Pole (exact match required)
• Reset logic: Active Low (exact match required)
• Number of voltages monitored: 1 channel (exact match required)
• Reset timeout: 140ms minimum or lower (equal or faster response acceptable)

Mechanical Compatibility Criteria:

• Package type: SC-70 / SOT-323 or SOT-23-3 (surface mount variants acceptable)
• Mounting type: Surface Mount (required)
• Moisture sensitivity: MSL 1 (Unlimited) or equivalent

Regulatory & Compliance Criteria:

• RoHS3 compliance (required)
• Operating temperature range: -40°C minimum and 85°C or higher maximum (equal or extended range acceptable)

Substitute parts are grouped into two categories: Microchip Technology direct equivalents (TCM809 series) and cross-manufacturer alternatives (Analog Devices Inc./Maxim Integrated MAX series). All listed substitutes maintain the core electrical specifications while offering variations in packaging format, temperature rating, and reset timeout characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TCM809TVLB713

The TCM809TVLB713 is the preferred direct substitute for the obsolete MIC809TYC3. This part maintains identical electrical specifications (3.08V threshold, 140ms reset timeout, active low reset logic) while offering an extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C). The TCM809TVLB713 is supplied in the same SC-70 / SOT-323 package as the original part, ensuring mechanical compatibility without PCB redesign. Product status is active with substantial inventory availability (5114 units), providing supply chain continuity. RoHS3 compliance and MSL 1 rating match the original specification.

Secondary Recommendation: TCM809TENB713

The TCM809TENB713 offers identical electrical performance to the MIC809TYC3 with the same operating temperature range (-40°C ~ 85°C). This part is supplied in SOT-23-3 package format, which requires PCB layout modification but provides superior availability (35300 units in stock). This option is suitable for new designs or redesign scenarios where package footprint adjustment is feasible.

Alternative Recommendation: MAX809TEXR+T

The MAX809TEXR+T from Analog Devices Inc./Maxim Integrated provides cross-manufacturer equivalence with identical reset timeout (140ms) and extended temperature rating (-40°C ~ 125°C). This part maintains SC-70 / SOT-323 package compatibility and is suitable for applications requiring vendor diversification or where Maxim components are preferred in the supply chain. Product status is active with 3406 units available.

Specialized Application: MAX6381XR31D2+T

The MAX6381XR31D2+T is suitable only for applications where faster reset response is required. This part features a 20ms reset timeout (versus 140ms in the original), representing a 7x faster response. Extended temperature rating (-40°C ~ 125°C) and SC-70 / SOT-323 package compatibility are maintained. This part should be selected only when circuit design specifically requires accelerated reset timing.

Not Recommended: MAX6326XR31+T

The MAX6326XR31+T exhibits reduced reset timeout (100ms versus 140ms required), which may cause timing incompatibility in designs dependent on the 140ms specification. This part should be avoided unless circuit analysis confirms that 100ms reset timeout is acceptable.

Frequently Asked Questions (FAQ)

Q: Can TCM809TENB713 be used as a direct replacement for MIC809TYC3 without PCB modification?

A: No. The TCM809TENB713 uses SOT-23-3 package while the MIC809TYC3 uses SC-70 / SOT-323 package. These packages have different pin layouts and footprints. PCB redesign is required. For direct footprint compatibility, use TCM809TVLB713 or MAX809TEXR+T.

Q: What is the difference between TCM809TVLB713 and TCM809TENB713?

A: Both parts are electrically identical with 3.08V threshold and 140ms reset timeout. The primary differences are: (1) TCM809TVLB713 uses SC-70 / SOT-323 package (matches original MIC809TYC3 footprint); TCM809TENB713 uses SOT-23-3 package. (2) TCM809TVLB713 is supplied on Tape & Reel; TCM809TENB713 is supplied on Cut Tape & Digi-Reel. (3) Both have extended temperature rating to 125°C.

Q: Is the MAX6381XR31D2+T a suitable replacement for the MIC809TYC3?

A: The MAX6381XR31D2+T maintains electrical compatibility for voltage threshold (3.08V), output type (push-pull totem pole), and reset logic (active low). However, the reset timeout is 20ms versus 140ms required. This part is suitable only if circuit design analysis confirms that faster reset response does not cause functional issues. Verify timing-critical applications before selection.

Q: Why does the TCM809TVNB713 appear in the substitute list but not in the primary recommendations?

A: The TCM809TVNB713 is electrically and thermally equivalent to TCM809TVLB713 but uses SOT-23-3 package instead of SC-70 / SOT-323. For direct footprint replacement of the MIC809TYC3, TCM809TVLB713 is preferred. TCM809TVNB713 is suitable for new designs where SOT-23-3 package is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (TCM809 series and MAX series) are RoHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the original MIC809TYC3 specification.

Q: Can I use MAX6326XR31+T as a substitute?

A: The MAX6326XR31+T is not recommended. While it maintains 3.08V threshold and SC-70 / SOT-323 package compatibility, the reset timeout is 100ms minimum versus 140ms required by the MIC809TYC3. This timing difference may cause circuit malfunction in designs dependent on the 140ms specification. Use MAX809TEXR+T instead for Maxim-based substitution.

Q: What is the advantage of TCM809TVLB713 over the original MIC809TYC3?

A: The TCM809TVLB713 is an active product with reliable long-term supply availability, whereas the MIC809TYC3 is obsolete. The TCM809TVLB713 offers extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C), providing improved performance margin in high-temperature environments. Electrical specifications and package format remain identical.

Q: Do all substitute parts use the same pin configuration?

A: SC-70 / SOT-323 package parts (TCM809TVLB713, MAX6326XR31+T, MAX6381XR31D2+T, MAX809TEXR+T) share identical pin configuration and are footprint-compatible. SOT-23-3 package parts (TCM809TENB713, TCM809TVNB713) use a different pin layout and require PCB redesign.