NS16C2552: Input impedance value of receiver input

Part Number: NS16C2552

Hi,

Do you have any data of input impedance value of SIN1 and SIN2?

and SINx of this device have CMOS or TTL buffer?

This thread is for NS16C2552, but it would be very appreciated if you could give me the same information above for PC16552.

Thanks,

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 316150 points

For both devices, all inputs are high-impedance CMOS inputs. (The PC16552 has TTL-compatible switching thresholds.)

You could derive the input impedance from the input voltage and input leakage current (5 V / 10 µA = 500 kΩ). But the datasheet specifies only the leakage current because this is more useful for designing a circuit.

0 Tyler Townsend over 2 years ago

TI__Mastermind 46533 points

Go,

I agree with Clemens here. Both devices exhibit high-impedance CMOS inputs.

Input impedance can we calculated from the input voltage and input leakage current.

NS16C2552: 5V / 10uA = 500kohm

PC16552: 5.5V / 10uA = 550kohm

Regards,

Tyler

Interface

Interface forum

NS16C2552: Input impedance value of receiver input