component
SN74HC688 8-Bit Comparator
Public Made by Adomby adom
8-bit magnitude/identity comparator with a single active-low equality output.
← Commit history
page.json+192−8@@ -1,8 +1,11 @@ {+ "schema_version": 1,+ "type": "component", "slug": "sn74hc688",+ "title": "SN74HC688 8-Bit Comparator",+ "brief": "8-bit magnitude/identity comparator with a single active-low equality output.", "version": "0.1.0",- "type": "component",- "description": "8-bit magnitude/identity comparator with a single active-low equality output.",+ "license": "CC-BY-SA-4.0", "tags": [ "logic", "comparator",@@ -12,6 +15,192 @@ "ti", "soic-20" ],+ "component": {+ "mpn": "SN74HC688",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-20",+ "pin_count": 20,+ "category": "Logic",+ "subcategory": "Comparator",+ "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc688.pdf",+ "parts": {+ "symbol": "sn74hc688.kicad_sym",+ "footprint": "sn74hc688.kicad_mod",+ "model_3d": "sn74hc688.glb"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "OE",+ "type": "input",+ "description": "Active-low output-enable. When high, forces the P=Q output high regardless of data inputs. When low, enables the comparator output."+ },+ {+ "number": "2",+ "name": "P0",+ "type": "input",+ "description": "P-word bit 0 data input. Compared against Q0 via an XNOR stage."+ },+ {+ "number": "3",+ "name": "Q0",+ "type": "input",+ "description": "Q-word bit 0 data input. Compared against P0 via an XNOR stage."+ },+ {+ "number": "4",+ "name": "P1",+ "type": "input",+ "description": "P-word bit 1 data input. Compared against Q1 via an XNOR stage."+ },+ {+ "number": "5",+ "name": "Q1",+ "type": "input",+ "description": "Q-word bit 1 data input. Compared against P1 via an XNOR stage."+ },+ {+ "number": "6",+ "name": "P2",+ "type": "input",+ "description": "P-word bit 2 data input. Compared against Q2 via an XNOR stage."+ },+ {+ "number": "7",+ "name": "Q2",+ "type": "input",+ "description": "Q-word bit 2 data input. Compared against P2 via an XNOR stage."+ },+ {+ "number": "8",+ "name": "P3",+ "type": "input",+ "description": "P-word bit 3 data input. Compared against Q3 via an XNOR stage."+ },+ {+ "number": "9",+ "name": "Q3",+ "type": "input",+ "description": "Q-word bit 3 data input. Compared against P3 via an XNOR stage."+ },+ {+ "number": "10",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference (0 V) for the device."+ },+ {+ "number": "11",+ "name": "P4",+ "type": "input",+ "description": "P-word bit 4 data input. Compared against Q4 via an XNOR stage."+ },+ {+ "number": "12",+ "name": "Q4",+ "type": "input",+ "description": "Q-word bit 4 data input. Compared against P4 via an XNOR stage."+ },+ {+ "number": "13",+ "name": "P5",+ "type": "input",+ "description": "P-word bit 5 data input. Compared against Q5 via an XNOR stage."+ },+ {+ "number": "14",+ "name": "Q5",+ "type": "input",+ "description": "Q-word bit 5 data input. Compared against P5 via an XNOR stage."+ },+ {+ "number": "15",+ "name": "P6",+ "type": "input",+ "description": "P-word bit 6 data input. Compared against Q6 via an XNOR stage."+ },+ {+ "number": "16",+ "name": "Q6",+ "type": "input",+ "description": "Q-word bit 6 data input. Compared against P6 via an XNOR stage."+ },+ {+ "number": "17",+ "name": "P7",+ "type": "input",+ "description": "P-word bit 7 (MSB) data input. Compared against Q7 via an XNOR stage."+ },+ {+ "number": "18",+ "name": "Q7",+ "type": "input",+ "description": "Q-word bit 7 (MSB) data input. Compared against P7 via an XNOR stage."+ },+ {+ "number": "19",+ "name": "P=Q",+ "type": "output",+ "description": "Active-low comparator output. Asserted low when the P and Q words are equal AND OE is low; otherwise forced high. Drives \u00b14 mA at 5 V, up to 10 LSTTL loads."+ },+ {+ "number": "20",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply voltage, 2 V to 6 V recommended (5 V nominal). Requires a 0.1 \u00b5F bypass capacitor placed close to the pin."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://www.ti.com/lit/ds/symlink/sn74hc688.pdf",+ "pages": 24,+ "sha256": "d600a33f4ebb7089",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Type": "8-bit identity (magnitude) comparator",+ "Logic family": "74HC (CMOS)",+ "Output": "Single active-low P = Q",+ "Enable": "Active-low",+ "Supply voltage": "2 V to 6 V",+ "Propagation delay": "20 ns typ at 5 V",+ "Operating temperature": "-40 C to 85 C"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "8-bit comparator",+ "identity comparator",+ "address decode match",+ "equality detect"+ ],+ "discovery_pitch": "Compare two 8-bit words and get a single active-low output when they match, for address decoding and equality checks.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -27,10 +216,5 @@ "docs/sn74hc688-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }