component
LMC555CMX
Public Made by Adomby adom
Texas Instruments Timers / Clock Oscillators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
main
Ray
pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left)
06c37f8
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{
"schema": "adom.pads/1",
"slug": "lmc555cmx",
"footprint": "SOIC-8_3.9x4.9mm_P1.27mm",
"generated_from": {
"footprint": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
"pins": "page.json:component.pins",
"overrides": null
},
"pin1": {
"pad": "1",
"at": [
-2.475,
-1.905
],
"corner": "top-left",
"source": "silk-marker",
"derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4"
},
"pad_count": 8,
"symbol_pins": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
],
"paste_apertures": 0,
"issues": [],
"pads": [
{
"pad": "1",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
-1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "1",
"name": "GND",
"type": "power_in",
"description": "Ground reference voltage. All voltages in the datasheet are measured with respect to this pin.",
"is_pin1": true,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "2",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
-0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "2",
"name": "TRIG",
"type": "input",
"description": "Trigger input (active low). Responsible for transition of the flip-flop from set to reset. A negative-going pulse below 1/3 Vcc sets the output high. Typical trigger voltage ~1.67 V at Vs = 5 V; trigger current ~10 pA.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "3",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "3",
"name": "OUT",
"type": "output",
"description": "Output driven waveform. CMOS/TTL-compatible push-pull output rated to source/sink up to ~50 mA at 5 V supply (tested at -10 mA / 50 mA output current levels).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "4",
"kind": "smd",
"shape": "roundrect",
"at": [
-2.475,
1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "4",
"name": "RESET",
"type": "input",
"description": "Active-low reset input. Negative pulse applied to this pin disables or resets the timer. When not used for reset purposes it should be tied to V+ to avoid false triggering. VRES typ 0.7 V at Vs = 1.5 V (Vs must be >= 2.0 V if RESET is used at -20 degC or below).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "5",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "5",
"name": "CTRL",
"type": "input",
"description": "Control voltage input. Sets the threshold and trigger comparator levels (nominally 2/3 Vcc). Typically bypassed to GND with a 0.01 uF capacitor; can be driven externally to modulate the output waveform.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "6",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "6",
"name": "THRES",
"type": "input",
"description": "Threshold input. Compares the applied voltage against the internal 2/3 Vcc reference; when exceeded, the flip-flop is reset and the output goes low. Threshold input current ~10 pA at Vs = 5 V.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "7",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
-0.635
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "7",
"name": "DISCH",
"type": "output",
"description": "Open-drain discharge output. Discharges the external timing capacitor between intervals (in phase with OUT). Toggles from high-impedance to low when the timing capacitor voltage reaches 2/3 Vcc. Discharge saturation voltage typ 150 mV at IDIS = 10 mA (Vs = 5 V).",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
},
{
"pad": "8",
"kind": "smd",
"shape": "roundrect",
"at": [
2.475,
-1.905
],
"rot": 0.0,
"size": [
1.95,
0.6
],
"layers": [
"F.Cu",
"F.Mask",
"F.Paste"
],
"thermal": false,
"pin": "8",
"name": "V+",
"type": "power_in",
"description": "Positive supply voltage with respect to GND. Recommended operating range 1.5 V to 15 V (absolute max 15 V). Typical supply current 100 uA at Vs = 5 V.",
"is_pin1": false,
"source": {
"geometry": "SOIC-8_3.9x4.9mm_P1.27mm.kicad_mod",
"meaning": "page.json:component.pins",
"correspondence": "kicad: symbol pin number == pad name"
}
}
]
}