Cirrus Logic CS8952 - Manual (Page 6)

CS8952
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver 6
DS206F1
10BASE-T CHARACTERISTICS
Parameter Symbol Min Typ Max Unit
10BASE-T Interface
Transmitter Differential Output Voltage (Peak) V
OD
2.2 - 2.8 V
Receiver Normal Squelch Level (Peak) V
ISQ
300 - 525 mV
Receiver Low Squelch Level (LoRxSquelch bit
set) V
SQL
125 - 290 mV
10BASE-T Transmitter
TXD Pair Jitter into 100
Ω Load
t
TTX1
- - 8 ns
TXD Pair Return to
≤ 50 mV after Last Positive
Transition
t
TTX2
- - 4.5 µs
TXD Pair Positive Hold Time at End of Packet t
TTX3
250 - - ns
10BASE-T Receiver
Allowable Received Jitter at Bit Cell Center t
TRX1
- - +/-13.5 ns
Allowable Received Jitter at Bit Cell Boundary t
TRX2
- - +/-13.5 ns
10BASE-T Link Integrity
First Transmitted Link Pulse after Last Transmit-
ted Packet t
LN1
15 16 17 ms
Time Between Transmitted Link Pulses t
LN2
15 16 17 ms
Width of Transmitted Link Pulses t
LN3
60 - 200 ns
Minimum Received Link Pulses Separation t
LN4
2 5 7 ms
Maximum Received Link Pulse Separation t
LN5
25 52 150 ms
Last Receive Activity to Link Fail (Link Loss
Timer) t
LN6
50 52 150 ms
10Base-T Jabber/Unjabber Timing
Maximum Transmit Time - 105 - ms
Unjabber Time - 406 - ms
TXD±
RXD±
LINKLED
t
LN1
t
LN3
t
LN2
t
LN5
t
LN4
t
LN6
RXD±
t
RTX1
t
RTX2 t
RTX3 t RTX4
Carrier Sense
(Internal)
TXD±
t
TTX1 t
TTX3
t
TTX2