component
PCF8523 Real-Time Clock
Public Made by Adomby adom
Low-power I2C real-time clock and calendar with battery backup and alarm.
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page.json+122−8@@ -1,8 +1,11 @@ {+ "schema_version": 1,+ "type": "component", "slug": "pcf8523",+ "title": "PCF8523 Real-Time Clock",+ "brief": "Low-power I2C real-time clock and calendar with battery backup and alarm.", "version": "0.1.0",- "type": "component",- "description": "Low-power I2C real-time clock and calendar with battery backup and alarm.",+ "license": "CC-BY-SA-4.0", "tags": [ "rtc", "real-time-clock",@@ -12,6 +15,122 @@ "nxp", "soic-8" ],+ "component": {+ "mpn": "PCF8523",+ "manufacturer": "NXP",+ "package": "SOIC-8",+ "pin_count": 8,+ "category": "Clock / Timing",+ "subcategory": "Real-Time Clock (RTC)",+ "datasheet": "https://www.nxp.com/docs/en/data-sheet/PCF8523.pdf",+ "parts": {+ "symbol": "pcf8523.kicad_sym",+ "footprint": "pcf8523.kicad_mod",+ "model_3d": "pcf8523.glb",+ "model_3d_step": "pcf8523.step"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "OSCI",+ "type": "input",+ "description": "32.768 kHz crystal oscillator input; high-impedance node. Connect to one terminal of the 32.768 kHz quartz crystal; internal load capacitors are selectable (7 pF or 12.5 pF via CAP_SEL). Keep wire length between quartz and package minimal."+ },+ {+ "number": "2",+ "name": "OSCO",+ "type": "output",+ "description": "32.768 kHz crystal oscillator output; high-impedance node. Connect to the other terminal of the 32.768 kHz quartz crystal."+ },+ {+ "number": "3",+ "name": "VBAT",+ "type": "power_in",+ "description": "Battery supply voltage input. Feeds the on-chip battery switch-over circuit which automatically supplies the RTC from the backup battery when VDD drops."+ },+ {+ "number": "4",+ "name": "VSS",+ "type": "power_in",+ "description": "Ground supply voltage (0 V reference)."+ },+ {+ "number": "5",+ "name": "SDA",+ "type": "bidirectional",+ "description": "I\u00b2C-bus serial data input/output. Open-drain; requires external pull-up resistor. Supports Fast-mode Plus up to 1 MHz."+ },+ {+ "number": "6",+ "name": "SCL",+ "type": "input",+ "description": "I\u00b2C-bus serial clock input. Requires external pull-up resistor. Supports Fast-mode Plus up to 1 MHz."+ },+ {+ "number": "7",+ "name": "INT1/CLKOUT",+ "type": "output",+ "description": "Interrupt 1 / clock output (open-drain). Selectable via register: either drives the active-LOW INT1 interrupt (alarm/timer/second) or the programmable CLKOUT (32.768 kHz / 16.384 kHz / 8.192 kHz / 4.096 kHz / 1.024 kHz / 32 Hz / 1 Hz). Requires external pull-up."+ },+ {+ "number": "8",+ "name": "VDD",+ "type": "power_in",+ "description": "Main supply voltage input. Operating range 1.0 V to 5.5 V; typical backup current 150 nA at VDD = 3.0 V, Tamb = 25 \u00b0C."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://www.nxp.com/docs/en/data-sheet/PCF8523.pdf",+ "pages": 78,+ "sha256": "409cb5ca8b0d04bc",+ "source_tier": "mfr"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 8,+ "described": 8,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "metadata": {+ "specs": {+ "Type": "I2C real-time clock / calendar",+ "Interface": "I2C (up to 1 MHz)",+ "Timekeeping": "Seconds to year, leap-year compensated",+ "Backup": "Battery switch-over",+ "Features": "Alarm, timer, programmable clock output",+ "Supply voltage": "1.8 V to 5.5 V",+ "Operating temperature": "-40 C to 85 C"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "real-time clock",+ "I2C RTC",+ "battery-backed clock",+ "calendar timekeeping",+ "alarm"+ ],+ "discovery_pitch": "A low-power I2C RTC that keeps time and date on a backup battery, with alarm and timer functions.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -28,10 +147,5 @@ "docs/pcf8523-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }