U2740B-BFP
| Model | U2740B-BFP |
| Description | UHF AM/FM Transmitter |
| PDF file | Total 10 pages (File size: 267K) |
| Chip Manufacturer | TEMIC |
U2740B
Pin Description
OSC1 1
OSC2 2
IC
LD
3
4
16 AM_in
15 PAGND
14 ANT2
13 ANT1
12 V
S
11 CS
10 XTO_out
9
95 9700
GND 5
FM_in 6
PD_out 7
XTAL2 8
Figure 2. Pinning
XTAL1
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
OSC1
OSC2
IC
LD
GND
FM_in
PD_out
XTAL2
XTAL1
XTO_out
CS
V
S
ANT1
ANT2
PAGND
AM_in
Function
VCO tank
VCO tank
Internally connected
Lock-detect (open collector)
Ground
FM modulation input
Phase detector output
FM modulation capacitor
XTAL
XTO output (open collector)
Chip-select (power-up)
Supply voltage
Differential output 1
Differential output 2
Power amplifier ground
AM modulation input
Loop
antenna
V
S
OSC1
V
S
:128
Power
LD
PD
LD
PD
OSC2 AM_in ANT1
ANT2
f
VCO
PA
µC
CS
Data
Clock
CS
FM_in
XTO_out
XTO
Power–up
V
Ref
I
Ref
XTAL1
XTAL2
GND
V
S
PAGND
13324
Figure 3. Block diagram
2 (10)
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A3, 24-Feb-97
