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YD2149 Schematic ( PDF Datasheet ) - Wuxi Youda electronics

Teilenummer YD2149
Beschreibung AM/FM 1 CHIP TUNER IC
Hersteller Wuxi Youda electronics
Logo Wuxi Youda electronics Logo 




Gesamt 7 Seiten
YD2149 Datasheet, Funktion
www.DataSheet4U.com
YOUDA INTEGRATED CIRCUIT
YD2149
AM/FM 1 CHIP TUNER IC—YD2149
FUNCTIONS
YD2149 are AM/FM 1 chip tuner ICs, which are designed for portable Radios and 3V Head phone Radios. This
is suitable for Digital Tuning System Applications. FM Local Oscillation Voltage is set up low relativity, for NEW
FCC.
For NEW FCC.
Suitable for combination with Digital Tuning System which is included IF Counter.
One terminal type AM/FM IF count output for IF counter of Digital Tuning system.
FM: 1.3375MHz(1/8 dividing)
AM: 450kHz
Built-in Mute Circuit for IF count output.
For adopting ceramic Discriminator,it is not necessary to adjust the FM Quad Detector Circuit.
Built-in FM MPX VCO circuit.
Built-in one terminal type AM/FM Local Oscillator Buffer Output for Digital Tuning System Applications.
Built-in 1/16 Pre-scaler for FM Local OSC Buffer.
Built-in AM Low cut circuit.
Low supply voltage range(Vcc=3V,Ta=25)
Iccq(FM)=13mA(Typ)
Iccq(FM)=8.5mA(Typ)
Operating Supply voltage range :Vcc=1.87V(Ta=25)
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106
Fax: 86-510-85205110
Website: www.e-youda.com
SHENZHEN OFFICE Tel86-755-83740369
Fax86-755-83741418
Ver 5.0
1 of 7
2006-7-10






YD2149 Datasheet, Funktion
www.DataSheet4U.com
YOUDA INTEGRATED CIRCUIT
TWES CIRCUIT
YD2149
AM RF IN
2k
0.022uF
OSC OUT
VT
SW8
8V
2SC1923
IF OUT
5V
2SC1815
2.4k
DET OUT
MPX IN
+
Vcc
+
SW4
SW7 SW5
24 23
FM RF OUT RF Vcc
22
AM RF IN
21
FM OUT
20 19
AM OUT OSC OUT
18
ST LED
17
IF REQ
16 15
DET OUT MPX IN
YD2149
14
LPF1
13
LPF2
RF GND FM RF IN AM LOW CUT MIX OUT
12 3 4
+
T2
Vcc AM IF IN FM IF IN
5 67
0.033uF
CF1
CF2
GND
8
AGC
9
+
QUAD
10
R-OUT
11
L-OUT
12
SW2
CR
+
SW3
LPF
330 4.7k
FM RF IN
BPF
FM IF IN 270
SW1
Vin
Vin
WuXi YouDa Electronics Co., Ltd
6 of 7
Website: www.e-youda.com

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