U4224B TEMIC Semiconductors, U4224B Datasheet - Page 2

• Manufacturer Part Number: U4224B
• Description: Time Code Receiver
• Manufacturer: TEMIC Semiconductors

Pin Description
IN
A ferrite antenna is connected between IN and V
high sensitivity the Q of the antenna circuit should be as
high as possible, but a high Q often requires temperature
compensation of the resonant frequency. Specifications
are valid for Q > 30. An optimal signal to noise ratio will
be achieved by a resonant resistance of 50 to 200 k
U4224B
2 (17)
SO 16 L
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Symbol
V
GND
DEC
PON
TCO
Q1A
Q1B
REC
FLA
Q2A
Q2B
V
FLB
INT
IN
SB
SL
CC
IN
CC
Supply voltage
Amplifier – Input
Ground
Bandwidth control
Crystal filter 1
Crystal filter 1
Rectifier output
Integrator output
Decoder input
Low pass filter
Low pass filter
AGC hold mode
Crystal filter 2
Crystal filter 2
Power ON/OFF control
Time code output
Function
94 8379
CC
W
. For
.
SB
A resistor R
trols the bandwidth of the crystal filters. It is
recommended: R
10 k
40 kHz.
W
for 60 kHz WWVB and R
GND
V
Q1A
Q1B
REC
SB
INT
SB
CC
IN
is connected between SB and GND. It con-
SB
1
5
7
2
3
4
6
8
= 0
TELEFUNKEN Semiconductors
U4224B
W
for DCF 77.5 kHz, R
93 7729 e
SB
16
15
13
12
10
Rev. A3, 02-Apr-96
14
11
= open for JG2AS
9 DEC
GND
SB
TCO
PON
Q2B
Q2A
SL
FLB
FLA
94 8381
SB
=