diff --git a/library/interface.dcm b/library/interface.dcm
index 68b0e087..3c689b2d 100644
--- a/library/interface.dcm
+++ b/library/interface.dcm
@@ -578,6 +578,12 @@ K Low Power Half-Duplex RS-485 Transceiver 10Mbps
 F http://www.icbase.com/pdf/SPX/SPX00480106.pdf
 $ENDCMP
 #
+$CMP TCA9534
+D 8 Bit Port/Expander, I2C SMBUS, Interrupt output, TSSOP-16, SOIC-20
+K SMBUS I2C Expander
+F http://www.ti.com/lit/ds/symlink/tca9534.pdf
+$ENDCMP
+#
 $CMP TCA9544A
 D I2C Hub, 4 Channels, Interrupts, TSSOP-20
 K I2C Hub
diff --git a/library/interface.lib b/library/interface.lib
index b6164c02..151da0b1 100644
--- a/library/interface.lib
+++ b/library/interface.lib
@@ -2606,6 +2606,38 @@ X VCC 8 0 400 100 D 50 50 1 1 W
 ENDDRAW
 ENDDEF
 #
+# TCA9534
+#
+DEF TCA9534 U 0 40 Y Y 1 F N
+F0 "U" -250 500 50 H V L CNN
+F1 "TCA9534" 100 500 50 H V L CNN
+F2 "" 950 -550 50 H I C CNN
+F3 "" 100 -100 50 H V C CNN
+$FPLIST
+ TSSOP*4.4x5mm*Pitch0.65mm*
+ SOIC*7.5x12.8mm*Pitch1.27mm*
+$ENDFPLIST
+DRAW
+S -250 -550 250 450 0 1 10 f
+X A0 1 -400 -200 150 R 50 50 1 1 I
+X A1 2 -400 -300 150 R 50 50 1 1 I
+X A2 3 -400 -400 150 R 50 50 1 1 I
+X P0 4 400 300 150 L 50 50 1 1 B
+X P1 5 400 200 150 L 50 50 1 1 B
+X P2 6 400 100 150 L 50 50 1 1 B
+X P3 7 400 0 150 L 50 50 1 1 B
+X GND 8 0 -700 150 U 50 50 1 1 W
+X P4 9 400 -100 150 L 50 50 1 1 B
+X P5 10 400 -200 150 L 50 50 1 1 B
+X P6 11 400 -300 150 L 50 50 1 1 B
+X P7 12 400 -400 150 L 50 50 1 1 B
+X ~INT~ 13 -400 100 150 R 50 50 1 1 C
+X SCL 14 -400 300 150 R 50 50 1 1 I
+X SDA 15 -400 200 150 R 50 50 1 1 B
+X VDD 16 0 600 150 D 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
 # TCA9544A
 #
 DEF TCA9544A U 0 40 Y Y 1 F N