diff --git a/library/74xx.dcm b/library/74xx.dcm
index 93dc1b26..44d7f21d 100644
--- a/library/74xx.dcm
+++ b/library/74xx.dcm
@@ -30,6 +30,18 @@ D Hex Inverseur
 K HCMOS not inv
 $ENDCMP
 #
+$CMP 74HC240
+D 8bits Buffer/Line Driver 3 state Inverting
+K TTL BUFFER 3State inv
+F http://www.nxp.com/documents/data_sheet/74HC_HCT240.pdf
+$ENDCMP
+#
+$CMP 74HC244
+D 8bits Buffer/Line Driver 3 state
+K TTL BUFFER 3State 
+F http://www.nxp.com/documents/data_sheet/74HC_HCT244.pdf
+$ENDCMP
+#
 $CMP 74HC245
 D Octal BUS Transceivers, 3 State out
 K HCMOS BUS 3State
@@ -62,6 +74,18 @@ D Hex Inverseur
 K HCTMOS not inv
 $ENDCMP
 #
+$CMP 74HCT240
+D 8 bit buffer; 3-state; inverting
+K octal buffer line driver inverting
+F http://www.nxp.com/documents/data_sheet/74HC_HCT240.pdf
+$ENDCMP
+#
+$CMP 74HCT244
+D 8bits Buffer/Line Driver 3 state
+K TTL BUFFER 3State 
+F http://www.nxp.com/documents/data_sheet/74HC_HCT244.pdf
+$ENDCMP
+#
 $CMP 74HCT541_PWR
 D 8bits Buffer/Line Driver 3 state Out
 K TTL BUFFER 3State BUS
diff --git a/library/74xx.lib b/library/74xx.lib
index 6d1df5d0..e04df396 100644
--- a/library/74xx.lib
+++ b/library/74xx.lib
@@ -112,6 +112,89 @@ X B4 19 600 200 300 L 50 50 1 1 B
 ENDDRAW
 ENDDEF
 #
+# 74HC240
+#
+DEF 74HC240 U 0 10 Y Y 1 F N
+F0 "U" 100 650 50 H V L CNN
+F1 "74HC240" 50 -650 50 H V L CNN
+F2 "" 0 0 50 H V C CNN
+F3 "" 0 0 50 H V C CNN
+ALIAS 74HCT240
+$FPLIST
+ DIP*W7.62mm*
+ SOIC*7.5x12.8mm*Pitch1.27mm*
+ TSSOP*4.4x6.5mm*Pitch0.65mm*
+ SSOP*4.4x6.5mm*Pitch0.65mm*
+$ENDFPLIST
+DRAW
+X GND 10 0 -700 150 U 50 50 0 0 W
+X VCC 20 0 700 150 D 50 50 0 0 W
+C 100 300 21 0 1 0 N
+S -400 550 400 -550 0 1 10 f
+P 2 0 1 0 -125 300 -175 300 N
+P 2 0 1 0 125 300 175 300 N
+P 4 0 1 0 -125 400 -125 200 75 300 -125 400 N
+X 1OE 1 -500 -400 100 R 50 50 1 1 I I
+X 1A0 2 -500 500 100 R 50 50 1 1 I
+X 2Y0 3 500 100 100 L 50 50 1 1 I
+X 1A1 4 -500 400 100 R 50 50 1 1 I
+X 2Y1 5 500 0 100 L 50 50 1 1 I
+X 1A2 6 -500 300 100 R 50 50 1 1 I
+X 2Y2 7 500 -100 100 L 50 50 1 1 I
+X 1A3 8 -500 200 100 R 50 50 1 1 I
+X 2Y3 9 500 -200 100 L 50 50 1 1 I
+X 2A3 11 -500 -200 100 R 50 50 1 1 T
+X 1Y3 12 500 200 100 L 50 50 1 1 T
+X 2A2 13 -500 -100 100 R 50 50 1 1 T
+X 1Y2 14 500 300 100 L 50 50 1 1 T
+X 2A1 15 -500 0 100 R 50 50 1 1 T
+X 1Y1 16 500 400 100 L 50 50 1 1 T
+X 2A0 17 -500 100 100 R 50 50 1 1 T
+X 1Y0 18 500 500 100 L 50 50 1 1 T
+X 2OE 19 -500 -500 100 R 50 50 1 1 I I
+ENDDRAW
+ENDDEF
+#
+# 74HC244
+#
+DEF 74HC244 U 0 10 Y Y 1 F N
+F0 "U" 100 650 50 H V L CNN
+F1 "74HC244" 50 -650 50 H V L CNN
+F2 "" 0 0 50 H V C CNN
+F3 "" 0 0 50 H V C CNN
+ALIAS 74HCT244
+$FPLIST
+ TSSOP*4.4x6.5mm*Pitch0.65mm*
+ SSOP*4.4x6.5mm*Pitch0.65mm*
+$ENDFPLIST
+DRAW
+X GND 10 0 -700 150 U 50 50 0 0 W
+X VCC 20 0 700 150 D 50 50 0 0 W
+S -400 550 400 -550 0 1 10 f
+P 2 0 1 0 -105 300 -155 300 N
+P 2 0 1 0 95 300 145 300 N
+P 4 0 1 0 -105 400 -105 200 95 300 -105 400 N
+X 1OE 1 -500 -400 100 R 50 50 1 1 I I
+X 1A0 2 -500 500 100 R 50 50 1 1 I
+X 2Y0 3 500 100 100 L 50 50 1 1 O
+X 1A1 4 -500 400 100 R 50 50 1 1 I
+X 2Y1 5 500 0 100 L 50 50 1 1 O
+X 1A2 6 -500 300 100 R 50 50 1 1 I
+X 2Y2 7 500 -100 100 L 50 50 1 1 O
+X 1A3 8 -500 200 100 R 50 50 1 1 I
+X 2Y3 9 500 -200 100 L 50 50 1 1 O
+X 2A3 11 -500 -200 100 R 50 50 1 1 I
+X 1Y3 12 500 200 100 L 50 50 1 1 O
+X 2A2 13 -500 -100 100 R 50 50 1 1 I
+X 1Y2 14 500 300 100 L 50 50 1 1 O
+X 2A1 15 -500 0 100 R 50 50 1 1 I
+X 1Y1 16 500 400 100 L 50 50 1 1 O
+X 2A0 17 -500 100 100 R 50 50 1 1 I
+X 1Y0 18 500 500 100 L 50 50 1 1 O
+X 2OE 19 -500 -500 100 R 50 50 1 1 I I
+ENDDRAW
+ENDDEF
+#
 # 74HC595
 #
 DEF 74HC595 U 0 40 Y Y 1 F N