Econet ATOM card parts list. 202,002

Components required on all ATOM network stations are;-

	PCB		Acorn Computers Ltd part no. 202,002
	IC	1	MC6854P		Advanced Data Link Controller
	IC	2, 3	2 off LM3l9N	High speed dual comparator
	IC	4	SN75159N	Dual differential line driver
	IC	5	74LS123N	Dual retriggerable monostable
	IC	8	DM81LS95 or 97	Tri-state octal buffer
	IC	9	74LS132N	Quad 2 input schmitt NAND gate
	IC	10	74LS14N		Hex schmitt inverter
	R 9, 10, 11 and 12		4 off 100K  resistors
	R 13, 15, 16 and 17		4 off 100K
	R 14, 18 and 21			3 off 2M2
	R 19, 20, 22 and 23		4 off 10K
	R 24, 25 and 26			3 off 1K
	R 27				39K
	R 28 and 29			2 off 10K
	R 34				10K
	R 35 to 42			8 off 47K
	C5				l0nF disc capacitor
	C6				lnF disc
	C7				10 to 47uF electrolytic
	C 11, 12 and 13			3 off 47nF discs
	C 14				10 to 47uF electrolytic
	Q1				BC239 npn transistor
1 off 28 way DIL IC socket
1 off 20 way DIL IC socket
1 off 16 way DIL IC socket
5 off 14 way DIL IC sockets
2 off 10 way Molex bottom entry sockets 4455-B

For stations generating the network clock add:-

	IC 6		74LS74N		Dual D type flip-flop
	IC 7		CD40l7B		Decoded decade counter
	R 30				4K7
	R 31				1K2 or 1K5, S.O.T.
	R 32 and 33			2 off 1K
	C 9 and 10			2 off 150pF discs
	1 off 16 pin DIL IC socket
	1 off 14 pin DIL IC socket

C 8 is not required on the card.

For terminating stations at the end of a network refer to the terminating instructions which specify some off;-

R 1 to 8
C 1 to 4
D 1 to 6