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TCA6416A: Inquiry about P port current and so on

Part Number: TCA6416A
Other Parts Discussed in Thread: TCA6424A,

Hi Expert,

I want to know something about TCA6416A and TCA6424A.

* Questions

1. As I know, this device can't support ADC. Below is our customer's question.

    Can the P port support ADC function?

2. Our customer want to control LEDs up to 15 or 20pcs.

   If I want to control LED On/Off by each P-port, how many current can support per P-port?

   When I checked Iiok = 20mA on data sheet, is it right?

   Do I have to do set max. current 20mA through external resistor between Vcc and LED?

   If I use schematic like below, What's the current spec. which is Iiok or Iol or Ioh? 


Best Regards,