SC144 v1.1

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STD SC144 v1.1

License: Public Domain

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Update time： 2021-10-11 10:23:50

Creation time： 2021-01-25 12:36:18

Description

SC144 v1.0 (www.scc.me.uk)

Real-time clock and I2C bus master card for Z50Bus.

Documentation at www.scc.me.uk

Design Drawing

schematic diagram

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PCB

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BOM

ID	Name	Designator	Footprint	Quantity
1	10k	R2,R1,R3,R4	AXIAL-0.3	4
2	BATT-CR2032	B1	BATT-CR2032	1
3	100nF	C3,C4,C5,C6,C1,C2	CAP-RAD-2.54MM	6
4	100uF	C7	CAP-ELEC-RAD-2.54MM	1
5	DS1302	U6	PDIP-08	1
6	74HCT273	U3	PDIP-20	1
7	HDR_1x06_S_M	P2,P3,P4,P5,P7,P8,P9	HDR-1X06-S-M-2.54MM	7
8	Xtal 32.768KHz	X1	XTAL 32.768KHZ	1
9	Outputs	P6	HDR-1X05-S-M-2.54MM	1
10	74HCT125	U5,U4	PDIP-14	2
11	Jumper_8X2	JP1	HDR-2X08-S-M-2.54MM	1
12	1k	R5,R6	AXIAL-0.3	2
13	Z50Bus Card Plug Large	P1	Z50BUS-HDR-2X25-A-M-2.54MM	1
14	8x10k	RP1	SIL-9	1
15	74HCT688	U1	PDIP-20	1
16	SCL	LED1	LED-3MM/2.54	1
17	SDA	LED2	LED-3MM/2.54	1
18	USR0 = SDA	JP3	HDR-1X02-S-M-2.54MM	1
19	USR3 = SCL	JP2	HDR-1X02-S-M-2.54MM	1
20	74HCT32	U2	PDIP-14	1