ics85354a Integrated Device Technology, ics85354a Datasheet - Page 13

• Manufacturer Part Number: ics85354a
• Description: Differential-to-lvpecl/ecl Multiplexer
• Manufacturer: Integrated Device Technology

T
Figure 4A and Figure 4B show examples of termination for
2.5V LVPECL driver. These terminations are equivalent to ter-
minating 50
85354AK-01
ERMINATION FOR
F
VCCO=2.5V
VCCO=2.5V
IGURE
F
IGURE
2,5V LVPECL
Driv er
2,5V LVPECL
Driv er
4A. 2.5V LVPECL D
4C. 2.5V LVPECL T
to V
Zo = 50 Ohm
Zo = 50 Ohm
Zo = 50 Ohm
Zo = 50 Ohm
CC
- 2V. For V
2.5V LVPECL O
CC
RIVER
= 2.5V, the V
2.5V
R1
250
ERMINATION
R1
50
R2
62.5
T
ERMINATION
R3
250
UTPUT
R2
50
R4
62.5
PRELIMINARY
E
CC
XAMPLE
+
-
+
-
- 2V is very
E
2.5V
XAMPLE
2.5V
D
13
IFFERENTIAL
close to ground level. The R3 in Figure 4B can be eliminated
and the termination is shown in Figure 4C.
F
VCCO=2.5V
IGURE
2,5V LVPECL
Driv er
4B. 2.5V LVPECL D
-
TO
Zo = 50 Ohm
Zo = 50 Ohm
-LVPECL/ECL M
RIVER
ICS85354-01
R1
50
T
ERMINATION
D
REV. A JANUARY 16, 2008
R2
50
R3
18
UAL
ULTIPLEXER
+
-
E
2:1/1:2
XAMPLE
2.5V