CXA1999 SONY [Sony Corporation], CXA1999 Datasheet - Page 3

• Manufacturer Part Number: CXA1999
• Description: IF Amplifier for M-ary FSK Pagers
• Manufacturer: SONY [Sony Corporation]

Pin Description
No.
Pin
1
2
3
4
5
6
7
OSC OUT
FSK REF
MIX OUT
Symbol
OSC IN
IF IN
V
B.S.
CC
Pin voltage
1.4 V
0.7 V
1.2 V
1.4 V
0.2 V
—
7
1
2
5
3
6
Equivalent circuit
1.5k
140k
72
40k
—3—
1.5k
15k
72
72
8k 8k
230
300
15k
1.5k
GND
V
GND
GND
V
V
GND
V
GND
CC
CC
CC
CC
Connects the external parts of
crystal oscillator circuit.
A capacitor and crystal oscillator
are connected to these pins and
V
Mixer output.
Connect a 455 kHz ceramic filter
between this pin and IF IN.
Power supply.
IF limiter amplifier input.
Controls the battery saving.
Setting this pin low suspends the
operation of IC.
(Applied voltage range: –0.5 V to
+7.0 V)
Connects the capacitor that
determines the low cut-off
frequency for the entire system.
CC
.
Description
CXA1999N