U4221B Datasheet, PDF (1/12 Pages) TEMIC Semiconductors – Radio Controlled Clock Receiver

Radio Controlled Clock Receiver
U4221B
Description
The U4221B is a bipolar integrated straight through receiver circuit in the frequency range of 60 to 80 kHz. The device
is designed for radio controlled clock application.
Features
D Low power consumption
D Very high sensitivity
D High selectivity by quartz resonator
D Stop-function available
D Only a few external components necessary
D Digitized serial output signal
Block Diagram
PON
14
TCO
13
VCCA
16
GND
15
Power supply
IN2
1
Amplifier 1
IN1
2
FSI
12
Driver
NC
VCCD
10
9
FSS
Comparator
11
AGC
Amplifier 2
Demodulator
CAGC
4
3
GND (analog)
86
OUTA1 INA2
Figure 1.
7
5
GND (digital) ^CDEM
93 7506 e
TELEFUNKEN Semiconductors
1 (12)
Rev. A1, 15-May-96
Preliminary Information