mc145443dw Freescale Semiconductor, Inc, mc145443dw Datasheet - Page 9

• Manufacturer Part Number: mc145443dw
• Description: Single-chip 300-baud Modem
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
RxA1
CDA
16
7
V CDA 1.2 V
C CDA
0.1 F
HYBRID
THRESHOLD
CONTROL
AMP
ac
V ref
Figure 6. Line Driver Using the DSI Input
AUTO–NULLED
COMPARATOR
R DSI
Figure 5. Carrier Detect Circuit
V AG
DSI
ExI
18
19
1
MODULATOR
OUTPUT
RETRIGGERABLE
ONE–SHOT
R 0
R i
SAMPLING
6 ms
R 0 = R f
–
+
CLOCK
R f
TxA
17
V DD
4
MC145442 MC145443
CDT
C CDT
0.1 F
3
CD
9