Comtech EF Data SDM-9000 - Manual (Page 199)

SDM-9000 Satellite Modem Options
Rev. 4 A–13
A.2.2.2 PECL Physical Interface
The PECL interface uses the same interface devices as the ECL, but is referenced to the
positive rail, as shown in Figure A-8. The electrical characteristics of both interface
types are shown in Table A-1.
5
4
2
1 16
8 9
MC10H115
100
+PECL_IN
-PECL_IN
+5V
5
2
1 16
8 12
4
MC10H101
330
-PECL_OUT
+PECL_OUT
330
+5V
Figure A-8. Typical Differential PECL Receiver and Driver
Table A-1. Electrical Characteristics of ECL and PECL
Interface Types
Symbol Parameter Min Max Units
V
OH
Output High Voltage -1.02 -0.74 V
ECL V
OL
Output Low Voltage -1.95 -1.60 V
V
IH
Input High Voltage -1.17 -0.84 V
V
IL
Input Low Voltage -1.95 -1.48 V
V
OH
Output High Voltage 3.98 4.26 V
PECL V
OL
Output Low Voltage 3.05 3.40 V
V
IH
Input High Voltage 3.83 4.16 V
V
IL
Input Low Voltage 3.05 3.52 V