mc145443dw Freescale Semiconductor, Inc, mc145443dw Datasheet - Page 2

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

* Changing the crystal frequency from 3.579 MHz will change the output frequencies. The
MC145442 MC145443
2
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
Supply Voltage
DC Input Voltage
DC Output Voltage
Clamp Diode Current, per Pin
DC Output Current, per Pin
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Supply Voltage
DC Input or Output Voltage
Input Rise or Fall Time
Crystal Frequency*
change in output frequency will be proportional to the change in crystal frequency.
MODE
RxA2
RxA1
SQT
X out
TxD
TLA
X in
* Refer to the FB pin description.
LB
15
16
13
14
11
20
2
8
9
Parameter
Rating
OSCILLATOR
–
+
MODULATOR
CONTROL
MODE
V in , V out
Symbol
f crystal
(Voltages Referenced to V SS )
V DD
DIVIDER
t r , t f
CLOCK
AAF
Symbol
I IK , I OK
V DD
V out
T stg
I out
V in
P D
T A
S/H
Min
4.5
3.2
—
0
SAMPLING CLOCK: 77.82 kHz
SAMPLING CLOCK: 19.46 kHz
– 0.5 to V DD + 0.5
– 0.5 to V DD + 0.5
BLOCK DIAGRAM
– 0.5 to + 7.0
– 65 to + 150
– 40 to + 85
Value
500
20
28
V DD
Max
500
5.5
5.0
HIGH–BAND
LOW–BAND
MHz
BPF
Unit
BPF
Unit
mW
ns
mA
mA
V
V
V
V
V
C
C
INTERNAL
SMOOTHING
V AG
FILTER
inputs against damage due to high static volt-
ages or electric fields; however, it is advised that
normal precautions be taken to avoid application
of any voltage higher than maximum rated
voltages to this high impedance circuit. For
proper operation it is recommended that V in and
V out be constrained to the range V SS
V out )
appropriate logic voltage level (e.g., either V SS
or V DD ).
This device contains circuitry to protect the
Unused inputs must always be tied to an
GENERATOR
V DD ).
GROUND
ANALOG
AC AMP
*
–
+
CARRIER
DETECT
DEMOD
MOTOROLA
10
17
18
19
12
4
7
3
5
1
6
(V in or
V AG
V DD
V SS
CDT
CDA
CD
RxD
FB
DSI
TxA
ExI