KSZ9021GN TR Micrel Inc, KSZ9021GN TR Datasheet - Page 44

• Manufacturer Part Number: KSZ9021GN TR
• Description: Specifications: Number of Drivers/Receivers: 8/8 ; Type: Transceiver ; Voltage - Supply: 3.135 V ~ 3.465 V ; Package / Case: 64-VFQFN Exposed Pad ; Packaging: Tape & Reel (TR) ; Protocol: Gigabit Ethernet ; Lead Free Status: Lead Free ; RoHS Stat
• Manufacturer: Micrel Inc

Micrel, Inc.
Timing Diagrams
GMII Transmit Timing
September 2010
Timing Parameter
1000Base-T
t
t
t
t
t
t
t
cyc
su
hd
hi
lo
r
f
Description
GTX_CLK period
TX_EN, TXD[7:0], TX_ER setup time to
rising edge of GTX_CLK
TX_EN, TXD[7:0], TX_ER hold time from
rising edge of GTX_CLK
GTX_CLK high pulse width
GTX_CLK low pulse width
GTX_CLK rise time
GTX_CLK fall time
Figure 6. GMII Transmit Timing – Data Input to PHY
Table 9. GMII Transmit Timing Parameters
44
Min
7.5
2.0
2.5
2.5
0
Typ
8.0
Max
8.5
1.0
1.0
Unit
ns
ns
ns
ns
ns
ns
ns
M9999-091010-1.1
KSZ9021GN