MC44818 Просмотр технического описания (PDF) - Motorola => Freescale
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MC44818 Datasheet PDF : 8 Pages
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MC44818
Figure 8. Pin Circuit Schematic
SDA 1
Data input
(I2C bus)
SCL 2
Clock input (supplied
by a microprocessor
via I2C bus)
132 k
50
20 V
ACK
VCC1
96 k
1/2 VCC1
96 k
132 k
500
20 V
VCC1
96 k
1/2 VCC1
96 k
VCC1
150 k
500
50 k 20 V
16 AS
Address Select
(I2C bus)
VCC1
2.0 k
100 k
20 V
15 LOCK
Lock detector output
100
XTAL 3
Crystal oscillator
(3.2 MHz or 4.0 MHz)
5.0 V
“On”/“Off”
20 V
20 V
14 VCC3
Positive supply for integrated
band buffers (12 V)
13 B3
AMP IN 4
Negative input of
operation amplifier and
charge pump output
VTUN 5
Operational amplifier
output which provides
the tuning voltage
2.0 k 10 k
20 V
20 k
100
20 V
20 V
VCC2 6
Operational amplifier
20 V
positive supply (33 V)
20 V
VCC1 7
Positive supply of
5.0 V
the circuit (5.0 V)
5.0 V
HF IN 8
HF input from
local oscillator
18 k
2.0 k
2.0 k
1.2 … 1.8 V
20 V
“On”/“Off”
20 V
“On”/“Off”
20 V
“On”/“Off”
12 B2
Band buffer outputs
can drive up to 30 mA
(40 mA at 0° to 80°C)
11 B1
10 B0
9 GND
Circuit Ground
MOTOROLA ANALOG IC DEVICE DATA
7
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