Features
• Integrated PLL Loop Filter
• ESD Protection also at ANT1/ANT2
(4 kV HBM/200 V MM; Except Pin 2: 4 kV HBM/100 V MM)
• High Output Power (8.0 dBm) with Low Supply Current (9.0 mA)
• Modulation Scheme ASK/FSK
– FSK Modulation is Achieved by Connecting an Additional Capacitor Between the
XTAL Load Capacitor and the Open Drain Output of the Modulating Microcontroller
• 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. Description
The T5753 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 310 MHz to 350 MHz. It can be used in both FSK and ASK
systems.
Figure 1-1. System Block Diagram
Micro-
controller
PLL
UHF ASK/FSK
Remote control receiver
UHF ASK/FSK
Remote control transmitter
T5753 U3741B/
U3745B/
T5743/
T5744
LNA VCO
PLL XTO
LNA
VCO
Antenna
Demod
IF Amp
Control
1 to 3
Encoder
ATARx9x
XTO
1 Li cell
Keys
Antenna
UHF ASK/FSK
Transmitter
T5753
4510J–RKE–12/08
