component
MCP7940NT-I
Public Made by Adomby adom
Microchip Real-time Clocks (RTC), SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
← Commit history
page.json: drop the phantom "EP" pin. The datasheet package drawing is an 8-lead SOIC with 8 pads and no thermal pad, matching the shipped footprint exactly, so there is no exposed pad for this entry to describe and no symbol pin could ever resolve to it. Removed rather than "fixed" by adding a pad: putting copper under a part whose die has no thermal path would be the real defect.
2 files changed
+4−17
pads.json+1−8@@ -29,14 +29,7 @@ "8" ], "paste_apertures": 0,- "issues": [- {- "kind": "pin-not-in-symbol",- "pin": "EP",- "name": "EP",- "detail": "page.json describes pin \"EP\" (EP) from the datasheet, but the symbol has no such pin, so nothing can connect to it"- }- ],+ "issues": [], "pads": [ { "pad": "1",
page.json+3−9@@ -15,7 +15,7 @@ "mpn": "MCP7940NT-I", "manufacturer": "Microchip", "package": "SOIC-8",- "pin_count": 9,+ "pin_count": 8, "category": "RTC", "subcategory": "Real-time Clocks (RTC)", "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/5093447976d64b9ab2cb1808413f6a3f.pdf",@@ -56,7 +56,7 @@ "number": "5", "name": "SDA", "type": "bidirectional",- "description": "Bidirectional I2C serial data (open-drain). Requires an external pull-up resistor to VCC (typ. 10 kΩ at 100 kHz or 2 kΩ at 400 kHz). Data may change only while SCL is low; changes while SCL is high signal Start/Stop conditions."+ "description": "Bidirectional I2C serial data (open-drain). Requires an external pull-up resistor to VCC (typ. 10 k\u03a9 at 100 kHz or 2 k\u03a9 at 400 kHz). Data may change only while SCL is low; changes while SCL is high signal Start/Stop conditions." }, { "number": "6",@@ -68,19 +68,13 @@ "number": "7", "name": "MFP", "type": "output",- "description": "Multifunction output (open-drain). Configurable as alarm output on an alarm match, as a selectable-frequency square-wave output, or as a general-purpose output driven by the OUT bit in the CONTROL register. Requires an external pull-up resistor to VCC (typ. 10 kΩ); leave floating if unused. VOL = 0.40 V at IOL = 3.0 mA (VCC = 4.5 V)."+ "description": "Multifunction output (open-drain). Configurable as alarm output on an alarm match, as a selectable-frequency square-wave output, or as a general-purpose output driven by the OUT bit in the CONTROL register. Requires an external pull-up resistor to VCC (typ. 10 k\u03a9); leave floating if unused. VOL = 0.40 V at IOL = 3.0 mA (VCC = 4.5 V)." }, { "number": "8", "name": "VCC", "type": "power_in", "description": "Primary power supply, 1.8 V to 5.5 V. Typical timekeeping current 1.2 uA at 3.3 V; SRAM/RTCC register operating current is 300 uA (read) / 400 uA (write) at VCC = 5.5 V, SCL = 400 kHz. Power-fail switchover to VBAT occurs at VTRIP (1.3-1.7 V)."- },- {- "number": "EP",- "name": "EP",- "type": "passive",- "description": "Exposed thermal/mechanical pad on the underside of the TDFN package. May be connected to VSS or left floating (per the Note under Table 3-1). Connection to VSS is recommended for mechanical anchoring and improved thermal performance." } ], "provenance": {