78Q2120-64CG ETC [List of Unclassifed Manufacturers], 78Q2120-64CG Datasheet - Page 24

• Manufacturer Part Number: 78Q2120-64CG
• Description: 10/100BASE-TX Ethernet Transceiver
• Manufacturer: ETC [List of Unclassifed Manufacturers]

78Q2120
10/100BASE-TX
Ethernet Transceiver
ELECTRICAL SPECIFICATIONS (continued)
ANALOG ELECTRICAL CHARACTERISTICS
100BASE-TX Transmitter
100BASE-TX Transmitter
The specifications in the following table are not tested during production test. They are included for information only.
* Measured at the line side of the transformer.
Test Conditions: Transformer p/n: TLA-6T103
PARAMETER
*Peak Output Amplitude, Vp+, Vp-
Output Amplitude Symmetry
Output Overshoot
Rise/Fall time, tr, tf
Rise/Fall time Imbalance
Duty Cycle Distortion
PARAMETER
Return Loss
Open Circuit Inductance
Jitter
Line Termination: 100
RIBB: 9.76K ±1% @3.3V
±1%
CONDITION
Best-fit over 14 bit
times;
0.5 dB Transformer
loss
Percent of Vp+, Vp-
10 - 90% of Vp+, Vp-
Deviation from best-fit
time-grid;
010101... Sequence
CONDITION
2 < f < 30 MHz
30 < f < 60 MHz
60 < f < 80 MHz
-8 < Iin < 8 mA
Scrambled Idle
|Vp +|
|Vp -|
|tr - tf|
24
16 20
0.98
MIN
950
3
log
MIN
350
16
10
30
NOM
MHz
f
MAX
MAX
1050
1.02
500
1.4
250
5
5
UNIT
UNIT
mV
ns
ps
ps
dB
%
ns
H