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参数资料
| 型号： | AN1672D |
| 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： | 3/10页 |
| 文件大小： | 64K |
| 代理商： | AN1672D |
AN1672/D
http://onsemi.com
3
Section 1: Translation Between Differently Supplied ECL Drivers and Receivers
Table 3. Translation Between Differently Supplied ECL Drivers and Receivers
To:
From:
PECL
V
CC
= +5 V
LVPECL
V
CC
= +3.3 V
LVNECL
V
EE
= 3.3 V
NECL
V
EE
= 4.5 to 5.2 V
PECL
V
CC
= +5 V
Standard Connection
LVEL92
LVEL91
EL91
LVPECL
V
CC
= +3.3 V
EL17
EP17
LVEL16
LVEL17
Direct Connection
LVEL91
LVEP91
LVEP91
LVNECL
V
EE
= 3.3 V
EL90
LVEL90
Standard Connection
Direct Connection
NECL
V
EE
= 4.5 V to 5.2 V
EL90
LVEL90
Standard Connection
Standard Connection
From PECL to LVPECL
The MC100LVEL92 translates signals from a PECL
(V
CC
=5.0, V
EE
=0.0) operating mode driver to a LVPECL
V
CC
= 3.3, V
EE
= 0.0 operating mode receiver.
From PECL to NECL
The MC100EL91 translates signals from a PECL
(V
CC
=5.0, V
EE
= 0.0) operating mode driver to a NECL
(V
CC
=0.0, V
EE
=5.0) operating mode receiver.
From PECL to LVNECL
The MC100LVEL91 translates signals from a PECL
(V
CC
= 5.0, V
EE
=0.0) operating mode driver to a LVNECL
(V
CC
=0.0, V
EE
= 3.3) operating mode receiver.
From LVPECL to PECL
The critical parameter for differential PECL receiver to
properly interface with a differential LVPECL driver is
V
IHCMRmin
(or V
CMRmin
). V
IH
and V
IL
limits may be
disregarded for differential receiving. Assuming no tangent
loss from traces, if the LVPECL driver V
OHmin
level is more
positive (higher) than the V
IHCMRmin
spec of the differential
PECL receiver, the device will properly translate or level
shift from LVPECL to PECL. For example, suppose a
MC100EP16 operating differentially in LVPECL mode
(V
CC
=3.3, V
EE
= 0.0) with a worst case V
OHmin
of 2.155 V,
drives a MC100EP17 receiver differentially operating in
PECL mode (V
CC
=5.0, V
EE
=0.0). The MC100EP17
receiver spec V
IHCMRmin
is 2.0 V and will always properly
recognize the drivers HIGH level 2.155 V (or higher). The
MC100EL13, MC100EL14, MC100EL29, MC100EL56
are also acceptable as LVPECL receivers differentially.
Most of the “E” (ECLinPS), “EL” (ECLinPS Lite),
10H/100H, or 10xxx series devices do not have a
sufficiently low V
IHCMRmin
to receive LVPECL.
When a receiver in LVPECL mode is driven single ended,
the critical parameters will be V
IL
and V
IH
. V
IHCMRmin
(or
V
CMRmin
) may be ignored. A PECL receiver V
ILmin
,
typically >3.0 V, will be insufficiently low to recognize the
drivers HIGH level and will not permit proper interconnect.
From LVPECL to LVNECL
The MC100LVEL91 translates signals from a PECL
(V
CC
= 5.0, V
EE
= 0.0) operating mode driver to a
LVNECL (V
CC
=0.0, V
EE
= 3.3) operating mode receiver.
From LVPECL to NECL
The MC100EL91 translates signals from a LVPECL
(V
CC
= 3.3, V
EE
= 0.0) operating mode driver to a NECL
(V
CC
= 0.0, V
EE
= 5.0) operating mode receiver.
From LVNECL to PECL
The MC100EL90 translates signals from a LVNECL
(V
CC
=0.0, V
EE
=3.3) operating mode driver to a PECL
(V
CC
= 5.0, V
EE
=0.0) operating mode receiver.
From LVNECL to LVPECL
The MC100LVEL90 translates signals from a LVNECL
(V
CC
= 0.0, V
EE
=3.3) operating mode driver to a PECL
(V
CC
= 3.3, V
EE
=0.0) operating mode receiver.
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