- 您现在的位置：买卖IC网 > PDF目录371001 > MC100SX1451FI100FI (Motorola, Inc.) Current-Limited, Power-Distribution Switches 8-MSOP-PowerPAD -40 to 85 PDF资料下载
参数资料
| 型号： | MC100SX1451FI100FI |
| 厂商： | Motorola, Inc. |
| 英文描述： | Current-Limited, Power-Distribution Switches 8-MSOP-PowerPAD -40 to 85 |
| 中文描述： | AUTOBAHNE⑩⑩SPANCEIVERE |
| 文件页数： | 8/17页 |
| 文件大小： | 197K |
| 代理商： | MC100SX1451FI100FI |
MC100SX1451FI100
MOTOROLA
ECLinPS and ECLinPS Lite
DL140 — Rev 3
8
PECL DESIGN CONSIDERATIONS
The differential serial bus is realized using PECL (Positive
Emitter Coupled Logic). PECL is normal ECL with the VCC
and VEE power supplies levels shifted from ground and –5.2V
to +5.0V and ground respectively. This change simplifies the
requirements of interfacing high speed ECL circuitry and TTL
circuitry on the same chip and improves the user system
architecture because only a single power supply is required.
The output driver circuitry is an open emitter, emitter
follower which generates PECL levels when terminated by a
pull down resistor to an appropriate reference voltage. The
output emitter follower circuitry is optimized to drive
transmission lines. To minimize line reflections, the
transmission line should be terminated with the line
characteristic impedance, in most cases 50
. The simplest
and most robust method of realizing this termination in PECL
is with a resistor divider network referenced to VCC. This
means the PECL output levels and the termination voltage
will then be referenced to the same VCC supply.
Figure 8 is the equivalent circuit for the serial bus.
Resistors R1 and R2 are used to implement a simple voltage
divider with the characteristic impedance of the transmission
line. The following equations are used to solve for these
values.
R1 = R2 ({VCC – VTT}/{VTT – VEE})
R2 = ZO ({VCC – VEE}/{VCC – VTT})
VTT = VCC (R2/{R1 + R2})
For the typical setup:
VCC = 5.0V; VEE = GND; VTT = 3.0V; and ZO = 50
R2 = 50 ({5 – 0}/{5–3}) = 125
R1 = 125 ({5–3}/{3–0}) = 83.3
More detailed information about PECL and thevenin
equivalent termination schemes can be found in Motorola
Application Note AN1406/D – “Designing with PECL”.
Figure 7. Typical Bus Application
PARALLEL BUS
INTERFACE
AUTO
BAHN
CARD 1
PARALLEL BUS
INTERFACE
AUTO
BAHN
CARD 2
PARALLEL BUS
INTERFACE
AUTO
BAHN
CARD N
TRADITIONAL
PARALLEL BUS
DIFFERENTIAL BI–DIRECTIONAL SERIAL
BUS
RESISTOR DIVIDER
TERMINATION NETWORK
B
Figure 8. Equivalent Circuit for Serial Bus
R2
R1
VCC
R2
R1
VCC
R2
R1
VCC
R2
R1
VCC
AUTOBAHN 1
AUTOBAHN N
CONTROLLED IMPEDANCE
TRANSMISSION LINES
相关PDF资料 |
PDF描述 |
|---|---|
| MC10107FN | Line Drivers 14-CDIP -55 to 125 |
| MC10107 | Triple 2-Input Exclusive OR/Exclusive NOR Gate |
| MC10107L | Triple 2-Input Exclusive OR/Exclusive NOR Gate |
| MC10107P | Triple 2-Input Exclusive OR/Exclusive NOR Gate |
| MC10109FN | Replaced by SN54LS132 : Quadruple 2-Input Positive-NAND Schmitt Triggers 14-CDIP -55 to 125 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC-100U | 制造商:SUMIDA 制造商全称:Sumida Corporation 功能描述:General Power Transformer |
| MC100VEL92DWR2G | 制造商:ON Semiconductor 功能描述: |
| MC100X100IG2 | 功能描述:电线导管 Slotted Metric Duct PVC,100x100mmx2M RoHS:否 制造商:Panduit 类型:Slotted SideWall Open finger design wiring cut 材料:Polypropylene 颜色:Light Gray 大小: 最大光束直径: 抗拉强度: 外部导管宽度:25 mm 外部导管高度:25 mm |
| MC100X100WH2 | 功能描述:电线导管 Slotted Metric Duct PVC,100x100mmx2M RoHS:否 制造商:Panduit 类型:Slotted SideWall Open finger design wiring cut 材料:Polypropylene 颜色:Light Gray 大小: 最大光束直径: 抗拉强度: 外部导管宽度:25 mm 外部导管高度:25 mm |
| MC100X50IG2 | 功能描述:电线导管 Slotted Metric Duct PVC,100x50mmx2M RoHS:否 制造商:Panduit 类型:Slotted SideWall Open finger design wiring cut 材料:Polypropylene 颜色:Light Gray 大小: 最大光束直径: 抗拉强度: 外部导管宽度:25 mm 外部导管高度:25 mm |
发布紧急采购，3分钟左右您将得到回复。