t4225b ATMEL Corporation, t4225b Datasheet - Page 11

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

Rev. A3, 03-Dec-98
Application Circuit for JG2AS 40 kHz
f
res
Ferrite
Antenna
= 40 kHz
+V
95 10383
VCC
IN1
IN
GND
TCO
SB
T4225B
PON
Q1A
40 kHz
Figure 22.
Q1B
2)
Q2B
REC
Q2A
INT
40 kHz
C 1
R
1 M
FLA
DEC
FLB
0.68 nF
SL
W
220 nF
C 2
PON
TCO
SL
C
3)
1)
10 nF
1) If SL is not used, SL is
2) 40-kHz crystal can be replaced
3) If IC is activated, PON is
3
connected to VCC
by 22 pF
connected to GND
Microcomputer
Control lines
Display
T4225B
Keyboard
11 (16)