component
CH450H
Public Made by Adomby adom
WCH Jiangsu Qin Heng Digital Tube Drivers, SOP-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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page.json+24−21@@ -50,121 +50,121 @@ "number": "1", "name": "DIG3", "type": "output",- "description": "Digit-3 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL \u22640.8 V at 80 mA sink, max continuous per-pin current 120 mA."+ "description": "Digit-3 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, max continuous per-pin current 120 mA." }, { "number": "2", "name": "DIG4", "type": "output",- "description": "Digit-4 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL \u22640.8 V at 80 mA sink, VOH \u22654.5 V at 8 mA."+ "description": "Digit-4 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, VOH ≥4.5 V at 8 mA." }, { "number": "3", "name": "SCL", "type": "input",- "description": "2-wire serial clock input; internal pull-up 100-300 \u00b5A; data sampled on rising edge; VIL \u22640.8 V, VIH \u22652.0 V; clock rate 0-2 MHz."+ "description": "2-wire serial clock input; internal pull-up 100-300 µA; data sampled on rising edge; VIL ≤0.8 V, VIH ≥2.0 V; clock rate 0-2 MHz." }, { "number": "4", "name": "SDA", "type": "bidirectional",- "description": "2-wire serial data input and open-drain output; internal pull-up 250-400 \u00b5A; MSB first; VIL \u22640.8 V, VIH \u22652.0 V; output valid within 30 ns of SCL falling edge."+ "description": "2-wire serial data input and open-drain output; internal pull-up 250-400 µA; MSB first; VIL ≤0.8 V, VIH ≥2.0 V; output valid within 30 ns of SCL falling edge." }, { "number": "5", "name": "GND", "type": "power_in",- "description": "Common ground reference; continuous current rating not less than 100 mA; decouple with \u22650.1 \u00b5F ceramic and \u2265100 \u00b5F electrolytic capacitor near VCC-GND pins."+ "description": "Common ground reference; continuous current rating not less than 100 mA; decouple with ≥0.1 µF ceramic and ≥100 µF electrolytic capacitor near VCC-GND pins." }, { "number": "6", "name": "DIG5", "type": "output",- "description": "Digit-5 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL \u22640.8 V at 80 mA sink."+ "description": "Digit-5 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink." }, { "number": "7", "name": "DIG6", "type": "output",- "description": "Digit-6 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL \u22640.8 V at 80 mA sink."+ "description": "Digit-6 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink." }, { "number": "8", "name": "DIG7", "type": "output",- "description": "Digit-7 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL \u22640.8 V at 80 mA sink."+ "description": "Digit-7 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink." }, { "number": "9", "name": "RSTH", "type": "output",- "description": "Power-on reset output, active-high; threshold voltage 2.3-2.9 V; reset pulse duration 6-50 ms; VOH \u22654.5 V at 4 mA, VOL \u22640.5 V at 4 mA."+ "description": "Power-on reset output, active-high; threshold voltage 2.3-2.9 V; reset pulse duration 6-50 ms; VOH ≥4.5 V at 4 mA, VOL ≤0.5 V at 4 mA." }, { "number": "10", "name": "SEG0", "type": "tri_state",- "description": "Segment-A drive, tri-state output active-high (min 15 mA source, VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A; VILseg \u22640.5 V, VIHseg \u22651.8 V."+ "description": "Segment-A drive, tri-state output active-high (min 15 mA source, VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA; VILseg ≤0.5 V, VIHseg ≥1.8 V." }, { "number": "11", "name": "SEG1", "type": "tri_state",- "description": "Segment-B drive, tri-state output active-high (VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A."+ "description": "Segment-B drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA." }, { "number": "12", "name": "VCC", "type": "power_in",- "description": "Positive supply voltage 3.0-5.5 V; continuous current not less than 100 mA; max 6.0 V absolute; decouple with \u22650.1 \u00b5F ceramic and \u2265100 \u00b5F electrolytic near pin."+ "description": "Positive supply voltage 3.0-5.5 V; continuous current not less than 100 mA; max 6.0 V absolute; decouple with ≥0.1 µF ceramic and ≥100 µF electrolytic near pin." }, { "number": "13", "name": "SEG2", "type": "tri_state",- "description": "Segment-C drive, tri-state output active-high (VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A."+ "description": "Segment-C drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA." }, { "number": "14", "name": "SEG3", "type": "tri_state",- "description": "Segment-D drive, tri-state output active-high (VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A; can wake CH450 from sleep when active."+ "description": "Segment-D drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA; can wake CH450 from sleep when active." }, { "number": "15", "name": "SEG4", "type": "tri_state",- "description": "Segment-E drive, tri-state output active-high (VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A."+ "description": "Segment-E drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA." }, { "number": "16", "name": "SEG5", "type": "tri_state",- "description": "Segment-F drive, tri-state output active-high (VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A."+ "description": "Segment-F drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA." }, { "number": "17", "name": "SEG6", "type": "tri_state",- "description": "Segment-G drive, tri-state output active-high (VOH \u22654.5 V at 15 mA, VOL \u22640.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A."+ "description": "Segment-G drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA." }, { "number": "18", "name": "SEG7", "type": "tri_state",- "description": "Decimal-point segment drive, tri-state output active-high; keyboard row-scan input active-high with internal pull-down \u221250 \u00b5A; max continuous per-pin segment current 25 mA, total all-SEG current 130 mA."+ "description": "Decimal-point segment drive, tri-state output active-high; keyboard row-scan input active-high with internal pull-down −50 µA; max continuous per-pin segment current 25 mA, total all-SEG current 130 mA." }, { "number": "19", "name": "INT#", "type": "tri_state",- "description": "Keyboard interrupt output, active-low, open-drain with internal pull-up 500-5000 \u00b5A; asserted when valid keypress detected; deasserted automatically after MCU reads keycode via SDA."+ "description": "Keyboard interrupt output, active-low, open-drain with internal pull-up 500-5000 µA; asserted when valid keypress detected; deasserted automatically after MCU reads keycode via SDA." }, { "number": "20", "name": "DIG2", "type": "output",- "description": "Digit-2 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL \u22640.8 V at 80 mA sink, max continuous per-pin current 120 mA."+ "description": "Digit-2 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, max continuous per-pin current 120 mA." } ], "provenance": {@@ -242,5 +242,8 @@ "docs/ch450h-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ]+ ],+ "visibility": {+ "public": true+ } }