- 您现在的位置：买卖IC网 > PDF目录378403 > AN1568D (ON SEMICONDUCTOR) Interfacing Between LVDS and ECL PDF资料下载
参数资料
| 型号： | AN1568D |
| 厂商： | ON SEMICONDUCTOR |
| 英文描述： | Interfacing Between LVDS and ECL |
| 中文描述： | 接口之间的LVDS和ECL |
| 文件页数： | 1/10页 |
| 文件大小： | 88K |
| 代理商： | AN1568D |
Semiconductor Components Industries, LLC, 2003
October, 2003 Rev. 8
1
Publication Order Number:
AN1568/D
AN1568/D
Interfacing Between LVDS
and ECL
Prepared by: Paul Lee
Logic Applications Engineer
ON Semiconductor
Introduction
Recent growth in highspeed data transmission between
highspeed ICs demand more bandwidth than ever before
while still maintaining high performance, low power
consumption and good noise immunity. Emitter Coupled
Logic (ECL) recognized the challenge and provided high
performance and good noise immune devices. ECL
migrated toward low voltages to reduce the power
consumption and to keep up with current technology trends
by offering 3.3 V and 2.5 V Low Voltage ECL (LVECL)
devices.
LVDS (Low Voltage Differential Signaling) technology
also addresses the needs of current high performance
applications. LVDS as specified in ANSI/TIA/EIA644 by
Data Transmission Interface committee TR30.2 and IEEE
1596.3 SCILVDS by IEEE Scalable Coherent Interface
standard (SCI) is a high speed, low power interface that is a
solution in many application areas. LVDS provides an
output swing of 250 mV to 400 mV with a DC offset of 1.2 V.
External
resistor
components
boardtoboard data transfer or clock distribution.
LVECL and LVDS are both differential voltage signals,
but with different output amplitude and offset. The purpose
of this documentation is to show the interfacing between
LVECL and LVDS. In addition, it gives interface
recommendations to and from 5.0 V supplied PECL devices
and negative supplied ECL or NECL
are
required
for
ECL levels
Today’s applications typically use ECL devices in the
PECL mode. PECL (Positive ECL) is nothing more than
supplying any ECL device with a positive power supply
(V
CC
= +5.0 V, V
EE
= 0 V). In addition, ECL uses differential
data transmission technology, which results in better noise
immunity. Since the common mode noise is coupled onto the
differential interconnect, it will be seen as a common mode
modulation and will be rejected.
With the trend towards low voltage systems, a new
generation of ECL circuitry has been developed. The Low
Voltage NECL (LVNECL) devices work using negative
–3.3 V or –2.5 V power supply, or more popular positive
power supplies, V
CC
= +3.3 V or +2.5 V and V
EE
= GND as
LVPECL. LVECL maintains 750 mV output swing with a
0.9 V offset from V
CC
, which makes them ideal as peripheral
components.
The temperature compensated (100EL, 100LVEL,
100EP, 100LVEP) output DC levels for the different supply
levels are shown in Table 1. ECL outputs are designed as an
open emitter, requiring a DC path to a more negative supply
than V
OL
. (see AND8020 for ECL Termination
information).
ECL standard DC input levels are also relative to V
CC
.
Many devices are available with Voltage Input HIGH
Common Mode Range (V
IHCMR
). These differential inputs
allow processing signals with small V
INPPMIN
(down to
200 mV, 150 mV or even 50 mV signal levels) within an
appropriate offset range. The V
IHCMR
ranges of ECL
devices are listed in each respective data sheets.
APPLICATION NOTE
http://onsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| AN1593 | LOW COST 1.0 A CURRENT SOURCE FOR BATTERY CHARGERS |
| AN1607 | ITC122 low voltage micro to motor interface |
| AN1672 | The ECL Translator Guide |
| AN1672D | The ECL Translator Guide |
| AN1687 | A FULL-FEATURED WIRELESS INTERFACE FOR RS-232 COMMUNICATIONS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AN-1577 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:SG1577A Layout Guidelines |
| AN158 | 制造商:MCNIX 制造商全称:Macronix International 功能描述:Serial-Data Interface Chip Supplies Bipolar Voltages |
| AN1580 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MOUNTING AND SOLDERING RECOMMENDATIONS FOR THE MOTOROLA POWER FLAT PACK PACKAGE |
| AN15851A | 功能描述:IC AV SWITCH 4 IN W/RGB-YUV CONV RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| AN15851A-E1 | 制造商:Panasonic Industrial Company 功能描述:IC SUB:AN15851B-E1 |
发布紧急采购，3分钟左右您将得到回复。