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Update time：
2020-06-16 12:06:41
Creation time：
2020-04-30 17:10:04
Description
Description
PCF8574 based 8-bit I/O expander for I2C-bus
Converting 3.3vdc logical level to 5vdc with optocoupler
Design Drawing
Design Drawing
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 4.7k | R1,R2,R4,R5,R6,R15,R18,R19,R20,R21,R22,R16,R17 | 0805 | 13 |
| 2 | 220R | R7,R29,R28,R27,R30,R8,R9,R10 | 0805 | 8 |
| 3 | 510R | R26,R25,R24,R23,R11,R12,R13,R14 | 0805 | 8 |
| 4 | PCF8574T | U1 | SOP-16_L10.3-W7.5-P1.27-LS10.4-BL | 1 |
| 5 | BC546 | Q1,Q2,Q3,Q4,Q5,Q6,Q7,Q8 | TO-92-3_L4.9-W3.7-P1.27-L | 8 |
| 6 | 0.1uF | C1 | CAP_0805 | 1 |
| 7 | M03 | JP1,JP2 | SCREWTERMINAL-3.5MM-3 | 2 |
| 8 | HDR-4x1/2.54 | P1,P2,P3,P4 | HDR-4X1/2.54 | 4 |
| 9 | I2C Address | H2 | HEADER 2X3 | 1 |
| 10 | PC847 | U3,U2 | DIP-16_W7.62MM | 2 |
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