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參數資料
| 型號： | LXT9761 |
| 英文描述： | Interface IC |
| 中文描述： | 接口IC |
| 文件頁數： | 53/68頁 |
| 文件大?。?/td> | 1177K |
| 代理商： | LXT9761 |
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Low-Power Octal PHY
—
LXT9784
Datasheet
53
4.2
AC Characteristics
Figure 15
defines the conditions under which timing measurements are done. The design must
guarantee proper operation for voltage swings and slew rates that exceed the specified test
conditions.
Table 30. 10BASE-T Transmitter Voltage/Current DC Characteristics
Parameter
Symbol
Min
Typ
Max
Units
Condition
Output differential Peak Voltage
V
OD10
2.2
2.8
V
R
= 100
Note 1.
Line Driver Supply Peak Current per port
I
CCT10
57
mA
R
= 464
Notes 2 and 3.
1. R
is the resistive load across the transmit differential pins, TPOP and TPON.
2. Current is measured on all Vcc pins @ Vcc = 3.3 V.
3. Transmitter current is measured with a 1:1 transformer. Transmitter peak current is governed by the following equation:
maximum differential output peak voltage divided by the load resistance value.
Table 31. 100BASE-TX Receiver Voltage/Current DC Characteristics
Parameter
Symbol
Min
Typ
Max
Units
Condition
Input Differential Resistance
R
ID100
10
k
DC. Note 1.
Input Differential Accept Peak Voltage
V
IDA100
500
1200
mV
Input Differential Reject Peak Voltage
V
IDR100
100
mV
Input Common Mode Voltage
V
ICM100
Vcc/2
V
1. This value is measured across the receive differential pins, TPIP and TPIN.
Table 32. 100BASE-TX Transmitter Voltage/Current DC Characteristics
Parameter
Symbol
Min
Typ
Max
Units
Condition
Output differential Peak Voltage
V
OD100
0.95
1.00
1.05
V
R
L
= 100
Note 1.
Line Driver Supply Peak Current per port
I
CCT100
20
mA
R
BIAS100
= 619
Notes 2 and 3.
1. R
L
is the resistive load across the transmit differential pins, TPOP and TPON.
2. Current is measured on all Vcc pins @ Vcc = 3.3 V.
3. Transmitter current is measured with a 1:1 transformer. Transmitter peak current is governed by the following equation:
maximum differential output peak voltage divided by the load resistance value.
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