t4225b ATMEL Corporation, t4225b Datasheet - Page 10

• Manufacturer Part Number: t4225b
• Description: Low-cost Time-code Receiver
• Manufacturer: ATMEL Corporation

Application Circuit for DCF 77.5 kHz
Application Circuit for WWVB 60 kHz
T4225B
Ferrite Antenna
f
Ferrite Antenna
10 (16)
res
f
res
= 77.5 kHz
= 60 kHz
+V
+V
CC
CC
95 10385
95 10384
VCC
VCC
IN1
IN1
IN
IN
GND
GND
TCO
TCO
10 k
SB
SB
T4225B
T4225B
PON
PON
Q1A
Q1A
77.5 kHz
60 kHz
Figure 20.
Figure 21.
Q1B
Q1B
2)
2)
Q2B
Q2B
REC
REC
6.8 nF
15 nF
C
C
Q2A
1
Q2A
1
INT
INT
77.5 kHz
60 kHz
DEC
FLB
FLB
DEC
FLA
FLA
33 nF
SL
SL
47 nF
C
C
2
2
PON
TCO
TCO
PON
SL
SL
C
3)
10 nF
1)
1)
C
10 nF
3)
1) If SL is not used, SL is
2) 77.5-kHz crystal can be replaced
3) If IC is activated, PON is
1) If SL is not used, SL is
2) 60-kHz crystal can be replaced
3) If IC is activated, PON is
3
3
by 10 pF
connected to VCC
by 10 pF
connected to GND
connected to VCC
connected to GND
Microcomputer
Microcomputer
Control lines
Control lines
Display
Display
Rev. A3, 03-Dec-98
Keyboard
Keyboard