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參數(shù)資料
| 型號： | 78Q2120 |
| 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 |
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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
相關PDF資料 |
PDF描述 |
|---|---|
| 78Q2120-64 | 10/100BASE-TX Ethernet Transceiver |
| 78Q2120-64CG | 10/100BASE-TX Ethernet Transceiver |
| 78Q2120-64CGT | 10/100BASE-TX Ethernet Transceiver |
| 78Q2120-64T | 10/100BASE-TX Ethernet Transceiver |
| 78Q2120-CGT | 10/100BASE-TX Ethernet Transceiver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 78Q2120-64 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10/100BASE-TX Ethernet Transceiver |
| 78Q2120-64CG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10/100BASE-TX Ethernet Transceiver |
| 78Q2120-64CGT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10/100BASE-TX Ethernet Transceiver |
| 78Q2120-64T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10/100BASE-TX Ethernet Transceiver |
| 78Q2120C | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:10/100BASE - TX Transceiver |
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