mt88l85anr1 Zarlink Semiconductor, mt88l85anr1 Datasheet - Page 7

• Manufacturer Part Number: mt88l85anr1
• Description: 3 V Integrated Dtmf Transceiver With Power-down And Adaptive Micro Interface
• Manufacturer: Zarlink Semiconductor

V
St/GT
ESt
V
St/GT
ESt
DD
DD
Figure 6 - Guard Time Adjustment
R1
R1
Zarlink Semiconductor Inc.
MT88L85
t
t
GTP
GTP
R2
b) decreasing
R2
C1
C1
a) decreasing
= (R1C1) In [V
= (R
7
t
t
GTA
GTA
P
C1) In [V
R
R
P
P
= (R1C1) In (V
= (R
= (R1R2) / (R1 + R2)
= (R1R2) / (R1 + R2)
t
GTA
t
p
GTP
C1) In (V
DD
DD
; (
; (
t
/ (V
/ (V
GTP
t
GTP
DD
DD
DD
DD
>
-V
-V
<
t
/V
/V
GTA
t
TSt
TSt
TSt
GTA
TSt
)]
)]
)
)
)
)
Data Sheet