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参数资料
| 型号： | AN1672 |
| 厂商： | ON SEMICONDUCTOR |
| 英文描述： | The ECL Translator Guide |
| 中文描述： | 翻译的ECL指南 |
| 文件页数： | 2/10页 |
| 文件大小： | 64K |
| 代理商： | AN1672 |
AN1672/D
http://onsemi.com
2
Different ECL operating supply modes are generally
considered to be as presented below in Table 1.
Table 1. ECL Operating Supply Modes
PECL
LVPECL
2.5VPECL
2.5VNECL
LVNECL
NECL
V
CC
= 5.0, V
EE
= 0.0
V
CC
= 3.3, V
EE
= 0.0
V
CC
= 2.5, V
EE
= 0.0
V
CC
= 0.0, V
EE
= 2.5
V
CC
= 0.0, V
EE
= 3.3
V
CC
= 0.0, V
EE
= 5.0
Some devices may span one or more operating modes and
each mode will allow supply tolerances. ECL signal levels
(V
OL
, V
OH
, V
IL
, and V
IH
) are referenced from the V
CC
pin
or positive rail. Therefore, when ECL devices are operated
from different negative power supplies, no translation is
required for interconnects. When operated in a single ended
configuration, the critical Input parameters are V
IL
and V
IH
limits (V
IHCMR
and V
pp
are ignored). When operation
differentially, critical limit Input parameters are V
IHCMR
and V
pp
(V
IL
and V
IH
are ignored). See AND8066 for
interconnect details. All supply pins, V
CC
, LVCC, and
GND, must be connected for proper operation. A 0.1 F to
0.01 F decoupling cap is recommended from V
CC
to GND.
V
CC
ripple should be minimized and may require additional
filter networks.
Standard non ECL operating modes are generally
considered (with certain supply tolerances) to be as presented
below in Table 2.
Table 2. Non ECL Operating Supply Modes
V
CC
= 5.0, V
EE
= 0.0
V
CC
= 3.3, V
EE
= 0.0
V
CC
= 2.5, V
EE
= 0.0
Most translation interface between technologies will
require a separate, dedicated translator IC device, but some
newer ECL devices offer a translation feature integrated into
certain mode control pins. Several of the GigaComm
devices offer a programmable mode pins for selecting the
control pins translation levels. MC10EP195 offers Delay
Select pins with user programmable TTL, CMOS, or ECL
threshold levels.
An alternative translation technique, cap coupling, is
discussed in Application Note AND8020, Section 5. Cap
coupling may accommodate level shifting when the signal’s
“edge density” is sufficient. Otherwise, coding may be
required to increase ”edge density”. Certainly the risk of
erroneous levels, due to the coupling cap leakage, may not
be acceptable and system requirements may demand the
hard levels found with active device translation.
相关PDF资料 |
PDF描述 |
|---|---|
| AN1672D | The ECL Translator Guide |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AN1672D | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:The ECL Translator Guide |
| AN1673.0 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Application Circuit to Generate Plus |
| AN1687 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:A FULL-FEATURED WIRELESS INTERFACE FOR RS-232 COMMUNICATIONS |
| AN1690.0 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Electronics Meets the Challenges of Patient Monitors |
| AN16903A | 制造商:PANASONIC 制造商全称:Panasonic Semiconductor 功能描述:IC for sound multiplex demodulation in NTSC (Japanese TV mode) |
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