DS_8430_001
78Q8430 Data Sheet
4.4 Digital I/O Characteristics
Table 15: Digital I/O Characteristics
Parameter
Symbol
VIL
Conditions
Min
–
Nom
Max
0.8
–
Unit
V
Input Voltage Low
Input Voltage High
Input Current
–
–
–
8
–
–
VIH
2.0
-1
V
IIL, IIH
CIN
1
µA
pF
V
Input Capacitance
–
–
Output Voltage Low VOL
IOL = 8 mA
IOH = -8 mA
–
0.4
–
Output Voltage
High**
VOH
TT
IZ
2.4
V
Output Transition
Time
CL = 20 pF
IOH = -8 ma (H to Z )
–
–
–
6
1
ns
Tri-state Output
Leakage Current*
Type tri-state only
-1
µA
**PMEB and INTB are active low outputs requiring external pull-up resistors. VOH for these outputs is not
specified.
4.5 Analog Electrical Characteristics
4.5.1 100Base-TX Transmitter
Table 16: MII 100Base-TX Transmit Timing
Parameter
Conditions
Min
Nom
Max
Unit
Peak Output Amplitude (|VP+|, |VP-|)
(see note below)
Best-fit over 14 bit times;
0.4 dB Transformer loss
|VP +|
950
–
1050 mVpk
Output Amplitude Symmetry
0.98
–
1.02
|VP -|
Output Overshoot
Percent of VP+, VP-
10-90% of VP+, VP-
|tR - tF|
–
3
–
–
–
–
–
–
5
5
%
ns
ps
ps
Rise/Fall time (tR, tF)
Rise/Fall time Imbalance
Duty Cycle Distortion
500
±250
Deviation from best-fit
time-grid;
010101... Sequence
Jitter
Scrambled Idle, Internal
Oscillator Mode
–
–
1.4
ns
Note: Measured at the line side of the transformer. Test Condition: Transformer P/N: TLA-6T103. Line
Termination: 100 Ω±1%
4.5.2 100Base-TX Transmitter (Informative)
Table 17: MII 100Base-TX Transmitter (Informative)
Parameter
Conditions
Min
Max
Unit
Return Loss
2 < f < 30 MHz
30 < f < 60 MHz
16
–
dB
f
16 − 20log
30MHz
10
60 < f < 80 MHz
-8 < IIN < 8 mA
Open-Circuit Inductance
350
–
µH
Note: The specifications in the preceding table are included for information only. They are mainly a
function of the external transformer and termination resistors used for measurements.
Rev. 1.2
19
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
