ATA5771 ATMEL Corporation, ATA5771 Datasheet - Page 40

• Manufacturer Part Number: ATA5771
• Manufacturer: ATMEL Corporation

Features
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1. Description
The T5754 is a PLL transmitter IC which has been developed for the demands of RF
low-cost transmission systems at data rates up to 32 kBaud. The transmitting
frequency range is 429 MHz to 439 MHz. It can be used in both FSK and ASK
systems.
Figure 1-1.
Integrated PLL Loop Filter
ESD Protection also at ANT1/ANT2
(4 kV HBM/200V MM; Except Pin 2: 4 kV HBM/100V MM)
High Output Power (7.5 dBm) with Low Supply Current (9.0 mA)
Modulation Scheme ASK/ FSK
Easy to Design-in Due to Excellent Isolation of the PLL from the PA and Power Supply
Single Li-cell for Power Supply
Supply Voltage 2.0V to 4.0V in the Temperature Range of –40°C to 85°C/125°C
Package TSSOP8L
Single-ended Antenna Output with High Efficient Power Amplifier
CLK Output for Clocking the Microcontroller
One-chip Solution with Minimum External Circuitry
125 C Operation for Tire Pressure Systems
1 Li cell
Keys
– FSK Modulation is Achieved by Connecting an Additional Capacitor Between the
XTAL Load Capacitor and the Open Drain Output of the Modulating Microcontroller
ATARx9x
Encoder
System Block Diagram
Remote control transmitter
T5754
XTO
UHF ASK/FSK
Power
VCO
amp.
PLL
Antenna
Antenna
U3741B/
U3745B/
T5743/
T5744
LNA
Remote control receiver
Demod
UHF ASK/FSK
VCO
PLL
Control
XTO
1 to 3
controller
Micro-
UHF ASK/FSK
Transmitter
T5754
4511I–RKE–02/07