u2745b ATMEL Corporation, u2745b Datasheet - Page 2

• Manufacturer Part Number: u2745b
• Description: Uhf Ask Transmitter
• Manufacturer: ATMEL Corporation

Figure 1. System Block Diagram
Figure 2. Block Diagram
2
1 Li cell
Keys
U2745B
ATARx9x
Encoder
Remote control transmitter
U2745B
LFGND
LFVCC
XTO
GND
VCC
ASK
CLK
EN
LF
UHF ASK
Power
PLL
VCO
amp.
Power
U2745B
OR
up
Antenna Antenna
VCO
f
f
64
n
U3745BM
XTO
PA
LNA
Remote control receiver
Demod.
IF Amp
GND
PWRSET
PWRVCC
ANT
PWRGND1
PWRGND2
XTO1
UHF ASK
NC
VCO
PLL
Control
XTO
1...3
4734A–RKE–11/03