- 您现在的位置：买卖IC网 > PDF目录16271 > 78Q8430EBST#DB (Maxim Integrated Products)EVAL BOARD 78Q8430 PDF资料下载
参数资料
| 型号： | 78Q8430EBST#DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 82/88页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD 78Q8430 |
| 标准包装： | 1 |
| 系列： | * |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页当前第82页第83页第84页第85页第86页第87页第88页
DS_8430_001
78Q8430 Data Sheet
Rev. 1.2
83
8
Isolation Transformers
Table 35: Isolation Transformers
Name
Value
Condition
Turns Ratio
1 CT : 1 CT
± 5%
Open-Circuit Inductance
350 H (min)
@ 10 mV, 10 kHz
Leakage Inductance
0.40 H (max)
@ 1 MHz (min)
Inter-Winding Capacitance
12 pF (max)
D.C. Resistance
0.9
(max)
Insertion Loss
0.4 dB (typ)
0 - 65 MHz
HIPOT
1500 Vrms
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. Table 35
gives the recommended line transformer characteristics. The 100Base-TX amplitude specifications
assume a transformer loss of 0.4 dB. For the transmit line transformer with higher insertion losses, up to
1.2 dB of insertion loss can be compensated by selecting the appropriate setting in the Transmit
Amplitude Selection bits in register MR19[11:10].
9
Reference Crystal
If the internal crystal oscillator is to be used, a crystal with the characteristics given in Table 36 should be
chosen.
Table 36: Reference Crystal
Name
Value
Units
Frequency
25.00000
MHz
Load Capacitance*
4**
pF
Frequency Tolerance
≤ ±50 per IEEE 802.3 requirement
PPM
Oscillation Mode
Parallel Resonance, Fundamental Mode
Parameters at 25
oC
± 2 oC ; Drive Level = 0.5 mW
Shunt Capacitance (max)
10
pF
Motional Capacitance (min)
10
pF
Series Resistance (max)
60
Spurious Response (max)
> 5 dB below main within 500 kHz
* Equivalent differential capacitance across the XTLP/XTLN pins.
** If a crystal with a larger load is used, external shunt capacitors to ground should be added to
make up the equivalent capacitance difference.
*** System vendors need to select the proper crystal according to their applications, such as
operating environment, product lifetime, and etc since crystal aging, operating temperature, and
other factors can affect the crystal frequency tolerance.
相关PDF资料 |
PDF描述 |
|---|---|
| CM453232-R18KL | INDUCTOR 180NH 700MA SMD |
| REC15-1205D/H3 | CONV DC/DC 15W 12VIN +/-05VOUT |
| VI-JWL-EZ-F3 | CONVERTER MOD DC/DC 28V 25W |
| A3BKB-2406G | IDC CABLE- ASR24B/AE24G/APK24B |
| REC15-2415D/H3 | CONV DC/DC 15W 24VIN +/-15VOUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 78Q8430STEM#DB | 功能描述:以太网开发工具 3-in-1 Silicon Delay Line RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
| 78-R3 | 功能描述:3M SCOTCHCAST REENTERABLE SIGNAL 制造商:3m 系列:* 零件状态:在售 标准包装:1 |
| 78-R4 | 功能描述:3M SCOTCHCAST REENTERABLE SIGNAL 制造商:3m 系列:* 零件状态:在售 标准包装:1 |
| 78RB02 | 功能描述:SWITCH 2 POS DIP RECESSED UNSLD RoHS:否 类别:开关 >> DIP 系列:78 特色产品:RDM Series Rotary DIP Switch 标准包装:70 系列:RDM 电路:十六进制 位置数:16 触点额定电压:0.1A @ 42VDC 触动器类型:用于工具旋转 触动器电平:凹槽式 安装类型:通孔 方向:顶部触动 可清洗:是 其它名称:EG4977-5RDMAR16PIT |
| 78RB02RA | 制造商:Grayhill 功能描述:DIP, 2 POS, FLUSH ACTUATOR, SPST, GOLD - Rail/Tube |
发布紧急采购，3分钟左右您将得到回复。