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| 型號： | 78Q2120-CGT |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 10/100BASE-TX Ethernet Transceiver |
| 中文描述： | 10/100BASE-TX以太網(wǎng)收發(fā)器 |
| 文件頁數(shù)： | 29/33頁 |
| 文件大小： | 200K |
| 代理商： | 78Q2120-CGT |
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78Q2120
10/100BASE-TX
Ethernet Transceiver
ISOLATION TRANSFORMERS
29
Two simple 1:1 isolation transformers are all that are required at the line interface, but transformers with
integrated common-mode choke are recommended for exceeding FCC requirements. This table gives the
recommended line transformer characteristics:
NAME
VALUE
CONDITION
Turns Ratio
1 CT : 1 CT
±
5%
350 uH (min)
Open-Circuit Inductance
@ 10 mV, 10 kHz
Leakage Inductance
0.40 uH (max)
@ 1 MHz (min)
Inter-Winding Capacitance
D.C. Resistance
12 pF (max)
0.9
(max)
1.1 dB (typ)
Insertion Loss
0 - 100 MHz
HIPOT
1500 Vrms
Note: The 100Base-TX amplitude specifications assume a transformer loss of 0.5 dB. For the transmit line
transformer, insertion loss up to 1.3 dB can be compensated by increasing the line drive current by means of
reducing the RIBB resistor value.
REFERENCE CRYSTAL
If the internal crystal oscillator is to be used, a crystal with the following characteristics should be chosen:
NAME
VALUE
UNITS
Frequency
25.00000
MHz
Load Capacitance
15
pF
Frequency Tolerance
±
50
±
2
±
5
PPM
Aging
PPM/yr
Temperature Stability ( 0 - 70
o
C)
PPM
Oscillation Mode
Parameters at 25
o
C
±
2
o
C ; Drive Level = 0.5 mW
Shunt Capacitance (max)
Parallel Resonance, Fundamental Mode
8
pF
Motional Capacitance (min)
Series Resistance (max)
10
25
fF
Spurious Response (max)
> 5 dB below main within 500 kHz
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| 78Q2123 | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:10/100BASE-TX Transceiver |
| 78Q2123/F | 功能描述:以太網(wǎng) IC 10/100 Fast Ethernet MicroPHY RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| 78Q2123/F1 | 功能描述:以太網(wǎng) IC RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| 78Q2123CGV/F | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:10/100BASE-TX Transceiver |
| 78Q2123CGVR/F | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:10/100BASE-TX Transceiver |
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