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参数资料
| 型号： | EM2C |
| 英文描述： | ACPI Regulator/Controller for Dual Channel DDR Memory Systems; Temperature Range: 0°C to 70°C; Package: 28-QFN |
| 中文描述： | EM2C以太网收发器模块与董事会隔离变压器 |
| 文件页数： | 11/12页 |
| 文件大小： | 124K |
| 代理商： | EM2C |
Ether Module - EM2C
10Base-2
MD400135/D
8
Symbol
Parameter
Min
Typ
Max
Units
I
CC1
Supply Current Non Transmitting
225
mA
I
CC2
Supply Current Transmitting[8]
300
mA
I
RXI
Receive Input Bias Current (RXI)[3]
–2
–1
+25
A
I
TDC
Transmit Output DC Current Level (TXO)
37
41
45
mA
I
TAC
Transmit Output AC Current Level (TXO)
±28
I
TDC
mA
V
CD
Collision Threshold (Receive Mode)[2]
–1.49
–1.53
–1.58
V
OD
Differential Output Voltage (RX
±, CD±)[2]
±550
±1200
mV
V
OC
DC Common Mode Output Voltage (RX
±, CD±)[1][7]
–1.5
–2.0
–2.5
V
OB
Idle State Differential Offset Voltage (RX
±, CD±)[7]
±40
mV
V
OA
AC Common Mode Output[7]
±40
mV
Voltage (RX
±, CD±)[2]
V
TSQ
Transmitter Squelch Threshold (TX
±)
–175
–225
–300
mV
C
X
TAP Capacitance[4]
3.0
4.0
pF
R
RXI
Shunt Resistance—Non Transmitting (RXI)[5]
100
K
R
TXO
Shunt Resistance—Transmitting(TXO)[2] [6]
10
K
Harmonic Content Relative to Fundamental
H
C2,3
Second and Third Harmonics
–20
dB
H
C4,5
Fourth and Fifth Harmonics
–30
dB
H
C6,7
Sixth and Seventh Harmonics
–40
dB
Electrical Characteristics V
CC = 5V ±5%, TA = 0° to 70°C (See Notes 1, 2 & 3)
R
[ I @ 0V] – [ I @ – 2V]
2V
=
V
I
=
NOTES
1. V
OC has no impact on system performance, since the twisted pair is transformer - isolated.
2. As required to meet ANSI/IEEE 802.3 and ISO 8802-3 specifications.
3. All currents into device pins are positive, all currents out of device pins are negative. All voltages referenced to ground
unless otherwise specified.
4. Measured at RXI. Guaranteed through characterization.
5. Current is measured on RXI while first forcing 0 volt and measuring the current, and then forcing –2 volts and measuring
the current.
Thus:
6. TX
± is first set to 1 volt differential (DC voltage) to surpass the squelch level.
Current is measured on TXO while first forcing 0 volt and measuring the current, and then forcing –2 volts and measuring the
current. Calculation is the same as item 5 above.
7. Values shown are internal to the module and are shown to indicate module capability only.
8. Values as shown is for 50% duty cycle, for 100% duty cycle I
CC2 = 380 ma.
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