U4065B Datasheet, PDF (2/23 Pages) TEMIC Semiconductors – FM Receiver

U4065B
Pin Description
Pin Symbol
Function
1 LOBUFF Buffered local oscillator output
2
GND1 Ground of the second IF ampli-
fier
3 IF2OUT Output of the second IF ampli-
fier
4 GAINIF1 Gain control of the first
IF amplifier
5
IF2IN Input of the second IF amplifier
6
VS
Supply voltage
7 IF1OUT Output of the first IF amplifier
8
GND2 Ground
9 IMIFIN Input of the amplifier for the
IM-sensor
10 AGCOUT Output of the automatic gain
control
11 IMMIXOUT Output of the intermodulation
mixer
12 D.N.C. Do not connect
Pin Symbol
Function
13 AGCWB Threshold adjustment of the
wideband AGC
14
GND3 Mixer ground
15 MIXIN1 Input 1 of the double balanced
mixer
16 MIXIN2 Input 2 of the double balanced
mixer
17
VREF Reference voltage output
18 MIXOUT1 Mixer output 1
19 MIXOUT2 Mixer output 2
20
GND4 Ground of the first
IF amplifier
21
IF1IN Input of the first amplifier
22
GND5 Oscillator ground
23
LOE Local oscillator (emitter)
24
LOB Local oscillator (base)
LOBUFF
23
+
94 8769
GND1
94 8770
50
1
ESD
1V
Buffered local oscillator output:
It drives the FM-input of the PLL circuit (for example
U428xBM-family). The typical parallel output resistance
W at 100 MHz is 70 , the parallel output capacitance is
W about 10 pF. When using an external load of 500 /
10 pF, the oscillator swing is about 100 mV. The second
harmonic of the oscillator frequency is less than
– 15 dBc.
8
2
ESD
Ground of the second IF amplifier:
There is no internal connection to the other ground pins.
2 (23)
Rev. A3, 15-Oct-98