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FIN3386 View Datasheet(PDF) - Fairchild Semiconductor

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FIN3386 Datasheet PDF : 21 Pages
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Truth Tables
Table 1. Input / Output Truth Table
Inputs
Outputs
TxIn
TxCLKIn
/PwrDn(1)
TxOut±
TxCLKOut±
Active
Active
Active
LOW / HIGH / High Impedance
HIGH
HIGH
LOW / HIGH
LOW / HIGH
LOW / HIGH
Don’t Care(2)
Floating
Floating
Active
Floating
HIGH
HIGH
LOW
LOW
LOW / HIGH
Don’t Care(2)
Don’t Care
Don’t Care
LOW
High Impedance
High Impedance
Notes:
1. The outputs of the transmitter or receiver remain in a high-impedance state until VCC reaches 2V.
2. TxCLKOut± settles at a free-running frequency when the part is powered up, /PwrDn is HIGH, and the TxCLKIn
is a steady logic level (LOW / HIGH / High-Impedance).
Power-Up / Power-Down Operation Truth Tables
The outputs of the transmitter remain in the High-Impedance state until the power supply reaches 2V. Table 2 shows
the operation of the transmitter during power-up and power-down and operation of the /PwrDn pin.
Table 2. Transmitter Power-Up / Power-Down Operation Truth Table
VCC
TxIN
TxOUT
TxCLKIn
TxCLKOut±
/PwrDn
<2V
Don’t Care
High Impedance
Don’t Care
High Impedance
LOW
PwrDn
>2V
Don’t Care
High Impedance
Don’t Care
High Impedance
LOW
Normal
>2V
Active
Active
Active
Active
HIGH
Table 3. Receiver Power-Up / Power-Down Operation Truth Table
/PwrDn
RxIn±
Don’t Care
Don’t Care
Active
Active
Note 3
Note 3
RxOut
High
Impedance
LOW
LOW/HIGH Last Valid State
HIGH
Last Valid
State
RxCLKIn±
Don’t Care
Don’t Care
Active
Note 3
Note 3
Note 3
RxCLKOut
High
Impedance
Note 4
Active
Note 4
Note 4
Note 4
/PwrDn
LOW
LOW
HIGH
HIGH
HIGH
HIGH
VCC
<2V
<2V
<2V
<2V
<2V
<2V
Notes:
3. If the input is terminated and un-driven (high-impedance) or shorted or open (fail-safe condition).
4. For /PwrDn or fail-safe condition, the RxCLKOut pin goes LOW for panel link devices and HIGH for channel link
devices.
5. Shorted means (± inputs are shorted to each other, or ± inputs are shorted to each other and ground or VCC, or
either ± inputs are shorted to ground or VCC) with no other current/voltage sources (noise) applied. If the VID is still
in the valid range (greater than 100mV) and VCM is in the valid range (0V to 2.4V), the input signal is still
recognized and the part responds normally.
© 2003 Fairchild Semiconductor Corporation
FIN3385 / FIN3386 • Rev. 1.0.6
5
www.fairchildsemi.com
 

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