Details

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BUY PCF8574AT/3,518 https://www.utsource.net/itm/p/12608331.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.0	-	6.0	V
Supply Current (Active)	ICC	VCC = 5V, No Load	-	1.0	-	mA
Supply Current (Standby)	ICC(STBY)	VCC = 5V, No Load	-	0.1	-	渭A
Output Low Voltage	VOL	IL = 4.0mA, VCC = 5V	-	0.4	-	V
Output High Voltage	VOH	IH = -0.8mA, VCC = 5V	-	4.6	-	V
Input Low Voltage	VIL	IL = 1.0渭A	-	1.5	-	V
Input High Voltage	VIH	IH = -1.0渭A	-	3.5	-	V
SDA/SCL Input Low Voltage	VIL(SDA/SCL)	IL = 3.0mA	-	0.3	-	V
SDA/SCL Input High Voltage	VIH(SDA/SCL)	IH = -0.4mA	-	3.0	-	V
SDA/SCL Rise Time	tr(SDA/SCL)	-	-	300	-	ns
SDA/SCL Fall Time	tf(SDA/SCL)	-	-	300	-	ns
Maximum Clock Frequency	fSCL	-	-	400	-	kHz
Operating Temperature Range	TA	-	-40	-	85	掳C
Storage Temperature Range	TSTG	-	-65	-	150	掳C

Instructions for Use

1. Power Supply:

   • Ensure the supply voltage (V_CC) is within the range of 2.0V to 6.0V.
   • The supply current (I_CC) should be monitored, especially during active operation.

2. I/O Pins:

   • The output low voltage (V_OL) should not exceed 0.4V when sourcing 4.0mA.
   • The output high voltage (V_OH) should be at least 4.6V when sinking -0.8mA.
   • The input low voltage (V_IL) should be below 1.5V, and the input high voltage (V_IH) should be above 3.5V.

3. I2C Interface:

   • The SDA and SCL lines have specific voltage thresholds for low (V_IL(SDA/SCL)) and high (V_IH(SDA/SCL)) states.
   • The rise time (t_r(SDA/SCL)) and fall time (t_f(SDA/SCL)) should not exceed 300ns.
   • The maximum clock frequency (f_SCL) is 400kHz.

4. Temperature:

   • The device can operate within a temperature range of -40掳C to 85掳C.
   • For storage, the temperature range is -65掳C to 150掳C.

5. Handling:

   • Handle the device with care to avoid static damage.
   • Follow proper soldering techniques to ensure reliable connections.

6. Programming:

   • Use the I2C protocol to communicate with the device.
   • Refer to the datasheet for specific commands and register addresses.

(For reference only)