mc68160b Freescale Semiconductor, Inc, mc68160b Datasheet - Page 18

• Manufacturer Part Number: mc68160b
• Description: Enhanced Ethernet Transceiver
• Manufacturer: Freescale Semiconductor, Inc

TP RECEIVE SWITCHING
TP RECEIVE LINK INTEGRITY SWITCHING
NOTES: 1. Measured with Test Load H attached to the receive pins.
18
Differential Input Voltage Range Unconditional Squelch (Note 1)
Positive or Negative Differential Input Pulse Width for Conditional Receive Unsquelch
TPRX to RCLK Bit Loss at start of packet (See Figure 25)
TPRX to RCLK Steady State Propagation Delay (See Figure 25)
TPRX to RX Start Up Delay (See Figure 25)
TPRX held high from last valid positive transition (See Figure 26)
RENA Deassertion Delay from last valid positive transition of TPRX Pair
Required Pulse Width Range to be recognized as a Link Pulse (Note 2)
Last TPRX activity to high state TPLIL Output
Receive Link Beat Separation
(1.8 V < Input Common Mode Voltage < 3.2 V)
(See Figure 24)
(Receive Link Loss Timeout Interval)
Minimum Range (Note 3)
Maximum Range (Note 4)
100
2. Measured at the receive pins.
3. Link beats closer in time to this range of values are considered noise, and are rejected.
4. Link beats further apart in time than this range of values are not considered consecutive, and are rejected.
TPTX+/–
TPSQEL
CLSN
Figure 23. Test Load H
100pF
1.0 H
1.0 H
100pF
Characteristic
Figure 22. TPTX SQE (CLSN) Timing (End of Frame)
200 H
Line
MC68160B
2V
TPRX
t 170
0mV
Figure 24. TPRX Input Switching
V IDFSTP
Symbol
t 171
MOTOROLA ANALOG IC DEVICE DATA
–330mV
t 180
t 181
t 182
t 183
t 186
t 187
t 200
t 201
t 202
t 203
1.5V
t 180
1.5V
Min
230
100
100
3.0
20
50
0
–
–
–
–
t 172
t 173
t 180
|264|
Max
400
400
200
150
150
1.5
7.0
30
10
–
+330mV
1.5V
Unit
Bits
mV
ms
ms
ns
ns
ns
ns
ns
s