78Q8392L View Datasheet(PDF) - TDK Corporation

Part Name

Description

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78Q8392L

Low Power Ethernet Coaxial Transceiver

TDK Corporation 

78Q8392L

Low Power Ethernet

Coaxial Transceiver

ELECTRICAL SPECIFICATIONS (continued)

TRANSMIT SPECIFICATIONS

The first bit transmitted from TXO may have data and

phase violations. The second through last bit reproduce

the TX± signal with less than or equal to the specified

jitter.

There is no logical signal inversion between Tx± and TXO

output. A low level from TX+ to TX- results in more

current flowing from the coaxial cable into the TXO pin.

At the end of transmission, when the transmitter

changes from the enabled state to the idle state, no

spurious pulses are generated, i.e., the transition on

TXO proceeds monotonically to zero current.

RXI

RECEIVE SPECIFICATIONS

The first bit sent from RX± may have data and phase

violations. The second through last bit reproduce the

received signal with less than or equal to the specified

jitter.

There is no logical signal inversion between the RXI

input and the RX± output. A high level at RXI produces

a positive differential voltage from RX+ to RX-.

50%

RX±

tRON

tRd

50%

tRO

90%

10%

1st BIT

tRr

tRf

FIGURE 3: Receiver Timing

TX±

TXO

VTS

tTON

50%

VTS

tTST

90%

10%

tTd

tTOFF

90%

50%

10%

tTF

tTr

FIGURE 4: Transmitter Timing

8

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