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TCA9543A: TCA9543A "Vpass" and "VDPUx"

simon lee
Prodigy 20 points

Part Number: TCA9543A

1. What is the relationship between "Vpass" and "VDPUx" in the TCA9543A?

2. What is the relationship between "VCC" and "VDPUx" in the TCA9543A?

2.png1.png

 

  • +1
    Guru 325940 points

    1. VDPUx must not be smaller than Vpass.

    2. Vpass depends on VCC.

  • +1
    Prodigy 20 points

    How about VCC value about below:
    1. VDPUM = 3.3V, VDPU0=3.3V / VDPU1=3.3V, VCC=?
    2. VDPUM = 3.3V, VDPU0=1.8V / VDPU1=1.8V, VCC=?
    3. VDPUM = 3.3V, VDPU0=1.8V / VDPU1=3.3V, VCC=?
    4. VDPUM = 3.3V, VDPU0=3.3V / VDPU1=1.8V, VCC=?

    5. VDPUM = 1.8V, VDPU0=1.8V / VDPU1=1.8V, VCC=?
    6. VDPUM = 1.8V, VDPU0=3.3V / VDPU1=3.3V, VCC=?
    7. VDPUM = 1.8V, VDPU0=3.3V / VDPU1=1.8V, VCC=?
    8. VDPUM = 1.8V, VDPU0=1.8V / VDPU1=3.3V, VCC=?

  • +1 in reply to simon lee
    Guru 325940 points

    Just use the smallest signal voltage as VCC. (3.3 V in case 1, 1.8 V in all other cases.)

    VCC can also be smaller, i.e., you could also use VCC = 1.8 V in case 1.