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參數(shù)資料
| 型號： | Am79C874 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | NetPHY-1LP Low Power 10/100-TX/FX Ethernet Transceiver |
| 中文描述： | NetPHY - 1LP低功率10/100-TX/FX以太網(wǎng)收發(fā)器 |
| 文件頁數(shù)： | 42/60頁 |
| 文件大小： | 869K |
| 代理商： | AM79C874 |
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42
Am79C874
P R E L I M I N A R Y
DC CHARACTERISTICS (CONTINUED)
Notes:
1. Applies to TEST1/ FXR+, TEST0/FXR-, and SDI+ inputs only. Valid only when in PECL mode.
2. Applies to RX inputs when in MLT-3 mode only. The RX input is guaranteed to assert internal signal detect for any valid
peak-to-peak input signal greater than V
SDA
MIN.
3. Applies to RX inputs when in MLT-3 mode only. The RX input is guaranteed to de-assert internal signal for any peak to peak
signal less than V
SDD
MAX.
4. Applies to FXT+ and FXT- outputs only. Valid only when in PECL mode.
5. Applies to TX differential outputs only. Valid only when in the MLT-3 mode.
6. V
TXR
is the ratio of the magnitude of TX in the positive direction to the magnitude of TX in the negative direction.
7. Only valid for TX output when in the 10BASE-T mode.
8. An I
OLL
value applies to LED pins.
9. Applies to all output pins on the MII port.
10. I
OZ
applies to all high-impedance output pins and all bi-directional pins. For COL and CRS parameters, I
OZH
limits are up to
40 A, and IOZL up to
–
500 A.
11. 75% activity means 25% IPG and 75% data. 100% activity means minimum IPG.
12. Applies to digital inputs and all bidirectional pins. These pins may have internal pull-up or pull-down resistors. RX limits up
to 1.0 mA max for I
IL
and
–
1.0 mA for I
IH
. XTL limits up to 6.0 mA for I
IL
and
–
6.0 mA for I
IH
. External pull-up/pull-down
resistors affect this value.
13. Parameter not measured.
Symbol
Parameter Description
Test Conditions
Minimum
Maximum
Units
V
TSQ
RX 10BASE-T Squelch
Threshold
Sinusoid 5 MHz<f<10 MHz
300
585
mV
THS
RX Post-Squelch Differential
Threshold 10BASE-T
Sinusoid 5 MHz<f<10 MHz
150
293
mV
V
RXDTH
10BASE-T RX Differential
Switching Threshold
Sinusoid 5 MHz<f<10 MHz
-60
60
mV
V
TX10NE
10BASE-T Near-End Peak
Differential Voltage
(Note 7)
MLT-3/10BASE-T Test Load
2.2
2.8
V
I
OZ
Output Leakage Current
(Note 10)
0.4 V < VOUT < V
DD
-30
30
A
C
IN
Input Capacitance XTL
(Note 13)
3
pF
I
CC
Power Supply Current
10BASE-T, idle
10BASE-T, normal activity
10BASE-T, peak
100BASE-TX
100BASE-TX, no cable
Power down
-
30
105
130
100
20
1
mA
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