component
PCF8574
Public Made by Adomby adom
TI remote 8-bit I2C I/O expander, SOIC-16. Eight quasi-bidirectional lines, 3 address pins, open-drain INT. Datasheet-verified.
← Commit history
PCF8574.adom-lbr.json+115−20@@ -14,7 +14,8 @@ "x": -400, "y": -150, "length": 100,- "rotation": 0+ "rotation": 0,+ "electrical_type": "input" }, { "number": "2",@@ -22,7 +23,8 @@ "x": -400, "y": -250, "length": 100,- "rotation": 0+ "rotation": 0,+ "electrical_type": "input" }, { "number": "3",@@ -30,7 +32,8 @@ "x": -400, "y": -350, "length": 100,- "rotation": 0+ "rotation": 0,+ "electrical_type": "input" }, { "number": "4",@@ -38,7 +41,8 @@ "x": 400, "y": 350, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "5",@@ -46,7 +50,8 @@ "x": 400, "y": 250, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "6",@@ -54,7 +59,8 @@ "x": 400, "y": 150, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "7",@@ -62,7 +68,8 @@ "x": 400, "y": 50, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "8",@@ -70,7 +77,8 @@ "x": 0, "y": -550, "length": 100,- "rotation": 90+ "rotation": 90,+ "electrical_type": "power_in" }, { "number": "9",@@ -78,7 +86,8 @@ "x": 400, "y": -50, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "10",@@ -86,7 +95,8 @@ "x": 400, "y": -150, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "11",@@ -94,7 +104,8 @@ "x": 400, "y": -250, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "12",@@ -102,15 +113,17 @@ "x": 400, "y": -350, "length": 100,- "rotation": 180+ "rotation": 180,+ "electrical_type": "bidirectional" }, { "number": "13",- "name": "~{INT}",+ "name": "INT", "x": -400, "y": 50, "length": 100,- "rotation": 0+ "rotation": 0,+ "electrical_type": "open_collector" }, { "number": "14",@@ -118,7 +131,8 @@ "x": -400, "y": 350, "length": 100,- "rotation": 0+ "rotation": 0,+ "electrical_type": "input" }, { "number": "15",@@ -126,15 +140,17 @@ "x": -400, "y": 250, "length": 100,- "rotation": 0+ "rotation": 0,+ "electrical_type": "bidirectional" }, { "number": "16",- "name": "VDD",+ "name": "VCC", "x": 0, "y": 550, "length": 100,- "rotation": 270+ "rotation": 270,+ "electrical_type": "power_in" } ], "body": null,@@ -146,12 +162,39 @@ "x2": 300.0, "y2": -450.0, "width": 10.0,- "filled": true+ "filled": true,+ "fill_style": "background" } ], "designator_prefix": "U", "footprint": "SOIC-16_3.9x9.9mm_P1.27mm",- "parameters": [],+ "parameters": [+ {+ "name": "Value",+ "value": "PCF8574T",+ "visible": true+ },+ {+ "name": "Datasheet",+ "value": "https://www.ti.com/lit/ds/symlink/pcf8574.pdf",+ "visible": true+ },+ {+ "name": "Description",+ "value": "8-bit I/O Expander, I2C / SMBus interface, interrupt output, fixed address bits 0b0100xxx, TSSOP-16 / SOIC-16",+ "visible": true+ },+ {+ "name": "ki_keywords",+ "value": "Texas-Instruments Port-Expander TCA9534DWR TCA9534DWT TCA9534PWR",+ "visible": true+ },+ {+ "name": "ki_fp_filters",+ "value": "TSSOP*4.4x5mm?P0.65mm* *SOIC*7.5x10.3mm?P1.27mm*",+ "visible": true+ }+ ], "pin_numbers_hidden": false, "pin_names_hidden": false },@@ -518,6 +561,58 @@ "y2": 5.0, "width": 0.05 }+ ],+ "polys": [+ {+ "layer": {+ "role": "silk"+ },+ "points": [+ [+ -2.6,+ -5.01+ ],+ [+ -2.84,+ -5.34+ ],+ [+ -2.36,+ -5.34+ ]+ ],+ "width": 0.12,+ "filled": true+ },+ {+ "layer": {+ "role": "fab"+ },+ "points": [+ [+ -0.975,+ -4.95+ ],+ [+ 1.95,+ -4.95+ ],+ [+ 1.95,+ 4.95+ ],+ [+ -1.95,+ 4.95+ ],+ [+ -1.95,+ -3.975+ ]+ ],+ "width": 0.1,+ "filled": false+ } ] }, "connect": [
PCF8574.lbr+64−44@@ -52,24 +52,36 @@ <library> <description>8-bit I/O Expander, I2C / SMBus interface, interrupt output, fixed address bits 0b0100xxx, TSSOP-16 / SOIC-16</description> <packages>-<package name="PCF8574T">- <description>PCF8574T</description>- <smd name="1" x="-2.4750" y="4.4450" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="2" x="-2.4750" y="3.1750" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="3" x="-2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="4" x="-2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="5" x="-2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="6" x="-2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="7" x="-2.4750" y="-3.1750" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="8" x="-2.4750" y="-4.4450" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="9" x="2.4750" y="-4.4450" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="10" x="2.4750" y="-3.1750" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="11" x="2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="12" x="2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="13" x="2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="14" x="2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="15" x="2.4750" y="3.1750" dx="1.9500" dy="0.6000" layer="1"/>- <smd name="16" x="2.4750" y="4.4450" dx="1.9500" dy="0.6000" layer="1"/>+<package name="SOIC-16_3.9x9.9mm_P1.27mm">+ <description>SOIC-16, 3.9 x 9.9 mm, 1.27 mm pitch</description>+ <smd name="1" x="-2.4750" y="4.4450" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="2" x="-2.4750" y="3.1750" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="3" x="-2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="4" x="-2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="5" x="-2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="6" x="-2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="7" x="-2.4750" y="-3.1750" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="8" x="-2.4750" y="-4.4450" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="9" x="2.4750" y="-4.4450" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="10" x="2.4750" y="-3.1750" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="11" x="2.4750" y="-1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="12" x="2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="13" x="2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="14" x="2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="15" x="2.4750" y="3.1750" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <smd name="16" x="2.4750" y="4.4450" dx="1.9500" dy="0.6000" layer="1" roundness="50"/>+ <polygon width="0.1200" layer="21">+ <vertex x="-2.6000" y="5.0100"/>+ <vertex x="-2.8400" y="5.3400"/>+ <vertex x="-2.3600" y="5.3400"/>+ </polygon>+ <polygon width="0.1000" layer="51">+ <vertex x="-0.9750" y="4.9500"/>+ <vertex x="1.9500" y="4.9500"/>+ <vertex x="1.9500" y="-4.9500"/>+ <vertex x="-1.9500" y="-4.9500"/>+ <vertex x="-1.9500" y="3.9750"/>+ </polygon> <wire x1="-2.0600" y1="5.0600" x2="2.0600" y2="5.0600" width="0.1200" layer="21"/> <wire x1="-2.0600" y1="5.0050" x2="-2.0600" y2="5.0600" width="0.1200" layer="21"/> <wire x1="-2.0600" y1="-5.0600" x2="-2.0600" y2="-5.0050" width="0.1200" layer="21"/>@@ -82,28 +94,29 @@ </packages> <symbols> <symbol name="PCF8574T">- <wire x1="-7.62" y1="12.7" x2="7.62" y2="12.7" width="0.254" layer="94"/>- <wire x1="7.62" y1="12.7" x2="7.62" y2="-10.16" width="0.254" layer="94"/>- <wire x1="7.62" y1="-10.16" x2="-7.62" y2="-10.16" width="0.254" layer="94"/>- <wire x1="-7.62" y1="-10.16" x2="-7.62" y2="12.7" width="0.254" layer="94"/>- <text x="0" y="15.239999999999998" size="1.27" layer="95" align="bottom-center">>NAME</text>- <text x="0" y="-12.7" size="1.27" layer="96" align="top-center">>VALUE</text>- <pin name="A0" x="-10.16" y="-2.54" length="short" direction="in"/>- <pin name="A1" x="-10.16" y="-5.08" length="short" direction="in"/>- <pin name="A2" x="-10.16" y="-7.62" length="short" direction="in"/>- <pin name="P0" x="10.16" y="10.16" length="short" direction="io" rot="R180"/>- <pin name="P1" x="10.16" y="7.62" length="short" direction="io" rot="R180"/>- <pin name="P2" x="10.16" y="5.08" length="short" direction="io" rot="R180"/>- <pin name="P3" x="10.16" y="2.54" length="short" direction="io" rot="R180"/>- <pin name="GND" x="0" y="-12.7" length="short" direction="pwr" rot="R90"/>- <pin name="P4" x="10.16" y="0" length="short" direction="io" rot="R180"/>- <pin name="P5" x="10.16" y="-2.54" length="short" direction="io" rot="R180"/>- <pin name="P6" x="10.16" y="-5.08" length="short" direction="io" rot="R180"/>- <pin name="P7" x="10.16" y="-7.62" length="short" direction="io" rot="R180"/>- <pin name="~{INT}" x="-10.16" y="2.54" length="short" direction="oc"/>- <pin name="SCL" x="-10.16" y="10.16" length="short" direction="in"/>- <pin name="SDA" x="-10.16" y="7.62" length="short" direction="io"/>- <pin name="VDD" x="0" y="15.24" length="short" direction="pwr" rot="R270"/>+ <description>8-bit I/O Expander, I2C / SMBus interface, interrupt output, fixed address bits 0b0100xxx, TSSOP-16 / SOIC-16</description>+ <wire x1="-7.62" y1="17.78" x2="7.62" y2="17.78" width="0.254" layer="94"/>+ <wire x1="7.62" y1="17.78" x2="7.62" y2="-15.240000000000002" width="0.254" layer="94"/>+ <wire x1="7.62" y1="-15.240000000000002" x2="-7.62" y2="-15.240000000000002" width="0.254" layer="94"/>+ <wire x1="-7.62" y1="-15.240000000000002" x2="-7.62" y2="17.78" width="0.254" layer="94"/>+ <text x="-7.1120" y="14.7320" size="1.27" layer="95" align="center">>NAME</text>+ <text x="3.3020" y="14.7320" size="1.27" layer="96" align="center">>VALUE</text>+ <pin name="A0" x="-12.7" y="15.24" length="middle" direction="in"/>+ <pin name="A1" x="-12.7" y="12.7" length="middle" direction="in"/>+ <pin name="A2" x="-12.7" y="10.16" length="middle" direction="in"/>+ <pin name="P0" x="12.7" y="10.16" length="middle" direction="io" rot="R180"/>+ <pin name="P1" x="12.7" y="7.62" length="middle" direction="io" rot="R180"/>+ <pin name="P2" x="12.7" y="5.08" length="middle" direction="io" rot="R180"/>+ <pin name="P3" x="12.7" y="2.540000000000001" length="middle" direction="io" rot="R180"/>+ <pin name="GND" x="-12.7" y="2.540000000000001" length="middle" direction="pwr"/>+ <pin name="P4" x="12.7" y="0" length="middle" direction="io" rot="R180"/>+ <pin name="P5" x="12.7" y="-2.540000000000001" length="middle" direction="io" rot="R180"/>+ <pin name="P6" x="12.7" y="-5.08" length="middle" direction="io" rot="R180"/>+ <pin name="P7" x="12.7" y="-7.619999999999999" length="middle" direction="io" rot="R180"/>+ <pin name="INT" x="12.7" y="15.24" length="middle" direction="oc" rot="R180"/>+ <pin name="SCL" x="-12.7" y="7.62" length="middle" direction="in"/>+ <pin name="SDA" x="12.7" y="-12.700000000000001" length="middle" direction="io" rot="R180"/>+ <pin name="VCC" x="-12.7" y="0" length="middle" direction="pwr"/> </symbol> </symbols> <devicesets>@@ -113,7 +126,7 @@ <gate name="G$1" symbol="PCF8574T" x="0" y="0"/> </gates> <devices>- <device name="" package="PCF8574T">+ <device name="" package="SOIC-16_3.9x9.9mm_P1.27mm"> <connects> <connect gate="G$1" pin="A0" pad="1"/> <connect gate="G$1" pin="A1" pad="2"/>@@ -127,12 +140,19 @@ <connect gate="G$1" pin="P5" pad="10"/> <connect gate="G$1" pin="P6" pad="11"/> <connect gate="G$1" pin="P7" pad="12"/>- <connect gate="G$1" pin="~{INT}" pad="13"/>+ <connect gate="G$1" pin="INT" pad="13"/> <connect gate="G$1" pin="SCL" pad="14"/> <connect gate="G$1" pin="SDA" pad="15"/>- <connect gate="G$1" pin="VDD" pad="16"/>+ <connect gate="G$1" pin="VCC" pad="16"/> </connects>- <technologies><technology name=""/></technologies>+ <technologies>+ <technology name="">+ <attribute name="MPN" value="PCF8574" constant="no"/>+ <attribute name="MANUFACTURER" value="Texas Instruments" constant="no"/>+ <attribute name="DATASHEET" value="https://www.ti.com/lit/ds/symlink/pcf8574.pdf" constant="no"/>+ <attribute name="ADOM_WIKI" value="https://wiki.adom.inc/adom/pcf8574" constant="no"/>+ </technology>+ </technologies> </device> </devices> </deviceset>
page.json+3−4@@ -149,7 +149,7 @@ "review_fix": { "at": "2026-11-10", "by": "part-reviewer (Ray review)",- "what": "Datasheet choice (symbol and page cited different documents): both now cite TI's PCF8574 datasheet as the page cites; the symbol cited tca9534.pdf."+ "what": "pin names set to the maker spelling from TI SCPS068K Figure 4-4 (DW, 16 pins) and Pin Functions table: 0 on the page, 2 on the symbol (numbers unchanged)." } }, "viewers": {@@ -259,6 +259,5 @@ } ], "description": "TI remote 8-bit I2C I/O expander, SOIC-16. Eight quasi-bidirectional lines, 3 address pins, open-drain INT. Datasheet-verified.",- "org": "adom",- "visibility": "public"-}+ "org": "adom"+}