MT8888C
Data Sheet
receiver will tolerate signal interruptions (drop out) too short to be considered a valid pause. This facility, together
with the capability of selecting the steering time constants externally, allows the designer to tailor performance to
meet a wide variety of system requirements.
V
DD
MT8888C
V
DD
St/GT
ESt
R1
C1
Vc
t
GTA
= (R1C1) In (V
DD
/ V
TSt
)
t
GTP
= (R1C1) In [V
DD
/ (V
DD
-V
TSt
)]
Figure 5 - Basic Steering Circuit
5.0
Guard Time Adjustment
The simple steering circuit shown in Figure 5 is adequate for most applications. Component values are chosen
according to the following inequalities (see Figure 7):
t
REC
≥
t
DPmax
+t
GTPmax
- t
DAmin
t
REC
≤
t
DPmin
+t
GTPmin
- t
DAmax
t
ID
≥
t
DAmax
+t
GTAmax
- t
DPmin
t
DO
≤
t
DAmin
+t
GTAmin
- t
DPmax
6
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
