am79761 Advanced Micro Devices, am79761 Datasheet - Page 14

• Manufacturer Part Number: am79761
• Description: Physical Layer 10-bit Transceiver For Gigabit Ethernet Gigaphy ?d
• Manufacturer: Advanced Micro Devices

KEY TO SWITCHING WAVEFORMS
AC CHARACTERISTICS
14
T
T
T
T
1
2
SDR
LAT
Symbol
,T
SDF
TXD[0:9] Setup time to the rising
edge of REFCLK
TXD[0:9] hold time after the rising
edge of REFCLK
TX rise and fall time
Latency from rising edge of
REFCLK to TXD0 appearing on
TX -
10 Bit Data
TXD[0:9]
REFCLK
Parameter Description
Data Valid
WAVEFORM
Figure 21. Transmit Timing Waveforms
Table 21. Transmit AC Characteristics
P R E L I M I N A R Y
Measured between the valid data
level of TXD[0:9] to the 1.4 V point of
REFCLK
20% to 80%, 75
on a sample basis
bc = Bit clocks
ns = Nano second
INPUTS
Must be
Steady
May
Change
from H to L
May
Change
from L to H
Don’t Care,
Any Change
Permitted
Does Not
Apply
Data Valid
Am79761
T
1
Test Conditions
T
2
load to V
OUTPUTS
Will be
Steady
Will be
Changing
from H to L
Will be
Changing
from L to H
Changing,
State
Unknown
Center
Line is High-
Impedance
“Off” State
Data Valid
KS000010-PAL
SS
, Tested
11bc - 1ns
Min
1.5
1.0
—
Max
300
—
—
—
21560A-7
Unit
ns
ns
ps
—