These are the parts required to build SC139, v1.0, Serial 68B50 module.

Reference	Qty	Component
PCB	1	SC139, v1.0, PCB
C1 to C3	3	Capacitor, ceramic, 100 nF
C4 and C5	2	Capacitor, ceramic, 22 pF
JP1 plus JP2, and JP3 plus JP4	2	Header, male, 1 x 4 pin, straight
JP5	1	Header, male, 1 x 2 pin, straight
JPA (Address )	1	Header, male, 2 x 8 pin, angled, or Header, male, 2 x 8 pin, straight
Jumper shunts	12	Jumper shunt
P1	1	Header, male, 1 x 40 pin, angled
P2	1	Header, female, 1 x 6 pin, angled
P3	1	Header, male, 1 x 6 pin, angled
R1 to R4	2	Resistor, 2k2, 0.25W
R5	1	Resistor, 1k, 0.25W
R6	1	Resistor, 1M, 0.25W
R7 and R8	2	Resistor, 100k, 0.25W
RP1	1	Resistor pack, 8 x 10k, SIL, 9-pin
X1	1	Crystal, 7.3728MHz
IC socket 20-pin U1	1	20-pin PDIP socket
IC socket 24-pin U2	1	24-pin PDIP socket
IC socket 14-pin U3	1	14-pin PDIP socket
Integrated circuits
U1	1	74HCT688
U2	1	68B50
U3	1	74HCT04