u2740b ETC-unknow, u2740b Datasheet - Page 2

• Manufacturer Part Number: u2740b
• Description: Am/fm Transmitter
• Manufacturer: ETC-unknow

Pin Description
U2740B
2 (10)
PD_out
XTAL2
FM_in
OSC2
OSC1
GND
LD
IC
1
3
5
8
2
4
6
7
V
C
S
Figure 2. Pinning
Power
LD
CS
Data
Clock
XTO_out
FM_in
95 9700
LD
PD
CS
Preliminary Information
16
15
14
13
12
11
10
9
AM_in
PAGND
XTAL1
ANT2
V
CS
XTO_out
ANT1
S
XTAL1
Figure 3. Block diagram
:128
XTO
f
PD
OSC1
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Power–up
XTAL2
VCO
XTO_out XTO output (open collector)
PAGND
Symbol
XTAL2
XTAL1
PD_out
AM_in
FM_in
OSC1
OSC2
ANT1
ANT2
GND
OSC2
LD
CS
V
IC
S
GND
AM_in ANT1
VCO tank
VCO tank
Internally connected
Lock-detect (open collector)
Ground
FM modulation input
Phase detector output
FM modulation capacitor
XTAL
Chip-select (power-up)
Supply voltage
Differential output 1
Differential output 2
Power amplifier ground
AM modulation input
TELEFUNKEN Semiconductors
PA
V
I
Ref
Ref
V
S
antenna
Loop
Function
PAGND
ANT2
Rev. A3, 24-Feb-97
13324
V
S