Details

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BUY MAX232CPE https://www.utsource.net/itm/p/12603817.html

Parameter	Symbol	Min	Typical	Max	Unit	Conditions
Operating Voltage	VCC	4.75	5.0	5.25	V
Operating Temperature Range		-40		85	掳C
Storage Temperature Range		-65		150	掳C
Driver Output Voltage (High)	VOH	5		5	V	RL = 5k惟
Driver Output Voltage (Low)	VOL	0		0.4	V	RL = 5k惟
Driver Output Current (Sink)	IOL		10		mA
Driver Output Current (Source)	IOH		-10		mA
Receiver Input Voltage (High)	VIH	2.0		5.0	V
Receiver Input Voltage (Low)	VIL	0		0.8	V
Receiver Output Voltage (High)	VOH	2.4		5.0	V
Receiver Output Voltage (Low)	VOL	0		0.4	V
Power Supply Current	ICC		250		渭A
Capacitor Value (Typical)	C1, C2		1.0		渭F

Instructions for Using MAX232CPE

1. Power Supply:

   • Connect the VCC pin to a 5V power supply.
   • Connect the GND pin to the ground.

2. Capacitors:

   • Place 1.0 渭F capacitors (C1 and C2) between the VCC and GND pins as close to the IC as possible to ensure stable operation.
   • Additional capacitors (C3, C4) may be required for the charge pump circuit to convert the 5V supply to 卤10V for RS-232 levels.

3. Driver Connections:

   • Connect the T1IN and T2IN pins to the TTL/CMOS logic inputs.
   • Connect the T1OUT and T2OUT pins to the RS-232 outputs.

4. Receiver Connections:

   • Connect the R1IN and R2IN pins to the RS-232 inputs.
   • Connect the R1OUT and R2OUT pins to the TTL/CMOS logic outputs.

5. Grounding:

   • Ensure that the ground of the MAX232CPE is connected to the ground of the system and the RS-232 device.

6. Layout Considerations:

   • Keep the layout compact to minimize noise and signal degradation.
   • Use short traces for high-speed signals and place bypass capacitors close to the IC.

7. Testing:

   • After assembly, apply a 5V supply and check the output voltages at T1OUT and T2OUT to ensure they are within the expected RS-232 voltage levels.
   • Verify the logic levels at R1OUT and R2OUT when RS-232 signals are applied to R1IN and R2IN.

By following these instructions, you can ensure reliable operation of the MAX232CPE in your RS-232 interface applications.

(For reference only)