T4224B-CC 데이터 시트보기 (PDF) - Temic Semiconductors
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T4224B-CC Datasheet PDF : 17 Pages
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U4224B
Pin Description
Pin Symbol
SO 16 L
1
VCC
2
IN
3
GND
4
SB
5
Q1A
6
Q1B
7
REC
8
INT
9
DEC
10
FLA
11
FLB
12
SL
13
Q2A
14
Q2B
15
PON
16
TCO
Function
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
VCC 1
IN 2
16 TCO
15 PON
GND 3
14 Q2B
SB 4
Q1A 5
U4224B
13 Q2A
12 SL
Q1B 6
11 FLB
REC 7
10 FLA
INT 8
9 DEC
93 7729 e
IN
SB
A ferrite antenna is connected between IN and VCC. For
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
W are valid for Q > 30. An optimal signal to noise ratio will
be achieved by a resonant resistance of 50 to 200 k .
A resistor RSB is connected between SB and GND. It con-
trols the bandwidth of the crystal filters. It is
W recommended: RSB = 0 for DCF 77.5 kHz, RSB =
W 10 k for 60 kHz WWVB and RSB = open for JG2AS
40 kHz.
94 8381
VCC
SB
IN
GND
94 8379
2 (17)
TELEFUNKEN Semiconductors
Rev. A3, 02-Apr-96
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