BOM for I/O Keypad Input & LCD Output Circuit
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Library				LCategory		Device					Vendor			Vendor#			Digikey#			Cost	Qty	
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74xx-eu (Version 2)	74*14			IC Inverter Gate		TI				SN74HCT14N		296-8394-5-ND		0.79	1
74xx-eu (Version 2)	74*08			IC AND Gate				TI				SN74HCT08N		296-1606-5-ND		0.70	1
74xx-eu (Version 2)	74*138			IC NAND Gate (4)		TI				SN74HCT138N		296-1612-5-ND		0.88	1
jumper				JP8Q			2-row x 8-pin header	SCC				PREC031DAAN-RC	S2012EC-31-ND		1.39	1
Intersil			CP82C55A-5Z		IC CMOS Parallel PPI	Intersil		CP82C55AZ		CP82C55AZ-ND		11.03	1
74ttl-din			74238N			IC 1 of 8 Dec/Demux		TI				CD74HCT238E		296-2143-5-ND		0.95	1
74xx-eu (Version 2)	74*245			IC Transceiver			TI				SN74HCT245N		296-1612-5-ND		0.88	1
resistor-sil (V 1)	G05R			4.7K Resistor network	Bourns	        4605X-101-472LF	4605X-101-472LF-ND	0.75	1
KEYPAD_4X4_MATRIX	Custom			16-key matrix keypad 	Banggood		933362			-------------		2.27	1
SparkFun-Resistors	TRIMPOT			10K Trimpot resistor 	SparkFun 		COM-09806		1568-1616-ND		1.42	1