
DM9331
100 Mbps Twisted Pair/Fiber Ethernet Media Converter Chip
28
Preliminary
Version: DM9331-DS-P02
September 21, 2001
AC Electrical Characteristics & Timing Waveforms
TP Interface
Symbol
t
TR/F
t
TM
t
TDC
Parameter
Min.
3.0
0
0
Typ.
---
---
---
Max.
5.0
0.5
0.5
Unit
Conditions
100TX+/- Differential Rise/Fall Time
100TX+/- Differential Rise/Fall Time Mismatch
100TX+/- Differential Output Duty Cycle
Distortion
100TX+/- Differential Output Peak-to-Peak Jitter
100TX+/- Differential Voltage Overshoot
ns
ns
ns
t
T/T
X
OST
0
0
---
---
1.4
5
ns
%
Oscillator Timing
Symbol
t
CKC
t
PWH
t
PWL
Parameter
Min.
19.998
8
8
Typ.
20
10
10
Max.
20.002
12
12
Unit
ns
ns
ns
Conditions
50ppm
OSC Cycle Time
OSC Pulse Width High
OSC Pulse Width Low
MDC/MDIO Timing
Symbol
t
0
t
1
t
2
t
3
Parameter
MDC Cycle Time
MDIO Setup Before MDC
MDIO Hold After MDC
MDC To MDIO Output Delay
Min.
80
10
10
0
Typ.
---
---
---
---
Max.
---
---
---
300
Unit
ns
ns
ns
ns
Conditions
When OUTPUT By STA
When OUTPUT By STA
When OUTPUT By DM9331
MDIO timing when OUTPUT by STA
MDC
t
1
MDIO
10ns
(Min)
t
2
10ns
(Min)
t0