Details

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BUY MCP23017-E/SS SSOP28 https://www.utsource.net/itm/p/12610503.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating	1.8	-	5.5	V
Input Leakage Current	IISS	VIN = VDD, TA = 25掳C	-1	-	1	渭A
Output Sink Current	IOL	VOL = 0.4V, TA = 25掳C	-	25	-	mA
Output Source Current	IOH	VOH = VDD-0.4V, TA = 25掳C	-	25	-	mA
High-Level Input Voltage	VIH	ICC = 1渭A	0.7	-	VDD	V
Low-Level Input Voltage	VIL	ICC = 1渭A	0	-	0.8	V
High-Level Output Voltage	VOH	IOH = -0.4mA	VDD-0.4	-	VDD	V
Low-Level Output Voltage	VOL	IOL = 16mA	0	-	0.4	V

Instructions for MCP23017-E/SS SSOP28

1. Power Supply Setup:

   • Ensure the supply voltage (VDD) is within the operating range of 1.8V to 5.5V.
   • Connect VDD to the positive power supply and GND to the ground.

2. I2C Communication:

   • The MCP23017 communicates via the I2C bus using SDA and SCL pins.
   • Pull-up resistors are required on both SDA and SCL lines for proper communication.

3. Pin Configuration:

   • Configure GPIOs as inputs or outputs using the registers (IODIRA/B).
   • Use pull-up resistors if needed by setting the corresponding bits in GPPUA/B registers.

4. Interrupt Handling:

   • Enable interrupts by configuring the INTCONA/B registers.
   • Monitor the INTA/B pins for interrupt signals from the device.

5. Operating Temperature:

   • Ensure the ambient temperature (TA) does not exceed the operational limits specified in the datasheet.

6. Current Limitations:

   • Do not exceed the maximum sink and source currents for input/output pins to prevent damage.

7. Programming:

   • Initialize the device by writing to configuration registers.
   • Read/write data to/from GPIO registers as needed.

8. Handling Static Electricity:

   • Handle the device with care to avoid ESD damage; use anti-static precautions.

9. Mounting:

   • Follow recommended PCB layout guidelines for optimal performance and reliability.

For detailed register configurations and advanced features, refer to the official Microchip MCP23017 datasheet.

(For reference only)