component
SN74HC123 Dual Monostable
Public Made by Adomby adom
Dual retriggerable monostable multivibrator (one-shot) with reset, 74HC CMOS.
← Commit history
page.json+169−8@@ -1,8 +1,11 @@ {+ "schema_version": 1,+ "type": "component", "slug": "sn74hc123",+ "title": "SN74HC123 Dual Monostable",+ "brief": "Dual retriggerable monostable multivibrator (one-shot) with reset, 74HC CMOS.", "version": "0.1.0",- "type": "component",- "description": "Dual retriggerable monostable multivibrator (one-shot) with reset, 74HC CMOS.",+ "license": "CC-BY-SA-4.0", "tags": [ "logic", "monostable",@@ -12,6 +15,169 @@ "ti", "soic-16" ],+ "component": {+ "mpn": "SN74HC123",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-16",+ "pin_count": 16,+ "category": "Logic",+ "subcategory": "Monostable Multivibrator",+ "datasheet": "https://www.ti.com/lit/ds/symlink/cd74hc123.pdf",+ "parts": {+ "symbol": "sn74hc123.kicad_sym",+ "footprint": "sn74hc123.kicad_mod",+ "model_3d": "sn74hc123.glb",+ "model_3d_step": "sn74hc123.step"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "1A",+ "type": "input",+ "description": "Monostable 1 trailing-edge trigger input (active-low, Schmitt trigger). A high-to-low transition on 1A triggers the one-shot when 1B = H and 1R = H."+ },+ {+ "number": "2",+ "name": "1B",+ "type": "input",+ "description": "Monostable 1 leading-edge trigger input (active-high, Schmitt trigger). A low-to-high transition on 1B triggers the one-shot when 1A = L and 1R = H."+ },+ {+ "number": "3",+ "name": "1R",+ "type": "input",+ "description": "Monostable 1 reset input (active-low). Driving 1R low terminates the output pulse and holds 1Q = L, 1Q_bar = H. Must be tied high when unused."+ },+ {+ "number": "4",+ "name": "1Q_bar",+ "type": "output",+ "description": "Monostable 1 inverted (complementary) buffered output. Drives 10 LSTTL loads (15 LSTTL as a bus driver) over the -55 to 125 C range."+ },+ {+ "number": "5",+ "name": "2Q",+ "type": "output",+ "description": "Monostable 2 non-inverted buffered output. Pulse width tW = 0.45 * 2Rx * 2Cx at VCC = 5V."+ },+ {+ "number": "6",+ "name": "2Cx",+ "type": "passive",+ "description": "Monostable 2 external timing capacitor terminal. Connect Cx from this pin to 2RxCx (pin 7); the capacitor sets the output pulse width together with 2Rx."+ },+ {+ "number": "7",+ "name": "2RxCx",+ "type": "passive",+ "description": "Monostable 2 external Rx/Cx common node. Connect the external timing resistor from VCC to this pin and the timing capacitor between 2Cx (pin 6) and this pin. Minimum Rx ~5 kOhm, minimum Cx = 0 pF."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Device ground reference (0 V)."+ },+ {+ "number": "9",+ "name": "2A",+ "type": "input",+ "description": "Monostable 2 trailing-edge trigger input (active-low, Schmitt trigger). A high-to-low transition on 2A triggers the one-shot when 2B = H and 2R = H."+ },+ {+ "number": "10",+ "name": "2B",+ "type": "input",+ "description": "Monostable 2 leading-edge trigger input (active-high, Schmitt trigger). A low-to-high transition on 2B triggers the one-shot when 2A = L and 2R = H."+ },+ {+ "number": "11",+ "name": "2R",+ "type": "input",+ "description": "Monostable 2 reset input (active-low). Driving 2R low terminates the output pulse and holds 2Q = L, 2Q_bar = H. Must be tied high when unused."+ },+ {+ "number": "12",+ "name": "2Q_bar",+ "type": "output",+ "description": "Monostable 2 inverted (complementary) buffered output."+ },+ {+ "number": "13",+ "name": "1Q",+ "type": "output",+ "description": "Monostable 1 non-inverted buffered output. Pulse width tW = 0.45 * 1Rx * 1Cx at VCC = 5V."+ },+ {+ "number": "14",+ "name": "1Cx",+ "type": "passive",+ "description": "Monostable 1 external timing capacitor terminal. Connect Cx from this pin to 1RxCx (pin 15)."+ },+ {+ "number": "15",+ "name": "1RxCx",+ "type": "passive",+ "description": "Monostable 1 external Rx/Cx common node. Connect the external timing resistor from VCC to this pin and the timing capacitor between 1Cx (pin 14) and this pin."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply. HC types: 2 V to 6 V. HCT types: 4.5 V to 5.5 V. Absolute max 7 V."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://www.ti.com/lit/ds/symlink/cd74hc123.pdf",+ "pages": 24,+ "sha256": "1ae45a9eac40347d",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Type": "Dual retriggerable monostable (one-shot)",+ "Logic family": "74HC (CMOS)",+ "Timing": "External R and C set pulse width",+ "Retriggerable": "Yes, with clear input",+ "Supply voltage": "2 V to 6 V",+ "Operating temperature": "-40 C to 85 C"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "one-shot",+ "monostable",+ "pulse generator",+ "retriggerable timer",+ "edge to pulse"+ ],+ "discovery_pitch": "Two retriggerable one-shots that turn an edge into a timed pulse set by an external RC, with a clear input.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -28,10 +194,5 @@ "docs/sn74hc123-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }