Rainbow-electronics T5754 User Manual

Browse online or download User Manual for Wireless Headsets Rainbow-electronics T5754. Rainbow Electronics T5754 User Manual

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1
Features
Integrated PLL Loop Filter
ESD Protection (4 kV HBM/ 200 V MM; Except Pin 2: 4 kV HBM/ 100 V MM) also at
ANT1/ANT2
High Output Power (7.5 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 2.0 V to 4.0 V 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
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. System Block Diagram
Demod.
IF Amp
LNA VCO
PLL XTO
Control
U3741B/
U3745B/
T5743/
T5744
1...3
µC
Power
amp.
XTO
VCO
PLL
T5754
Antenna Antenna
UHF ASK/FSK
Remote control transmitter
UHF ASK/FSK
Remote control receiver
Encoder
M44Cx9x
1 Li cell
Keys
UHF ASK/FSK
Transmitter
T5754
Preliminary
Rev. 4511D–RKE–08/02
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Summary of Contents

Page 1 - Preliminary

1Features• Integrated PLL Loop Filter• ESD Protection (4 kV HBM/ 200 V MM; Except Pin 2: 4 kV HBM/ 100 V MM) also at ANT1/ANT2• High Output Power (7.5

Page 2 - Pin Description

10T5754 4511D–RKE–08/02Package Information Ordering InformationExtended Type Number Package RemarksT5754-6AQ TSSOP8L Taped and reeled

Page 3

Printed on recycled paper.© Atmel Corporation 2002.Atmel Corporation makes no warranty for the use of its products, other than those expressly contai

Page 4 - Crystal equivalent circuit

2T5754 4511D–RKE–08/02Pin ConfigurationFigure 2. Pinning TSSOP8L 12348765CLKPA_ENABLEANT2ANT1ENABLEGNDVSXTALT5754Pin DescriptionPin Symbol Function

Page 5

3T57544511D–RKE–08/02Figure 3. Block Diagram General Description This fully integrated PLL transmitter allows particularly simple, low-cost RF miniat

Page 6

4T5754 4511D–RKE–08/02Functional DescriptionIf ENABLE = L and the PA_ENABLE = L, the circuit is in standby mode consuming onlya very small amount of

Page 7

5T57544511D–RKE–08/02Output Matching and Power SettingThe output power is set by the load impedance of the antenna. The maximum outputpower is achieve

Page 8

6T5754 4511D–RKE–08/02Figure 6. ASK Application CircuitCLKPA_ENABLEANT2ANT1ENABLEGNDVSXTAL1234 5678VCOLFCPPFDf32XTOPLLPAf4Power up / downM4xCx9xC3VS

Page 9

7T57544511D–RKE–08/02Figure 7. FSK Application CircuitCLKPA_ENABLEANT2ANT1ENABLEGNDVSXTAL1234 5678VCOLFCPPFDf32XTOPLLPAf4Power up / downM4xCx9xC3VSC1

Page 10 - Ordering Information

8T5754 4511D–RKE–08/02Figure 8. ESD Protection CircuitCLK PA_ENABLEANT2ANT1XTAL ENABLEVSGNDAbsolute Maximum RatingsParameters Symbol Minimum Maximum

Page 11 - 4511D–RKE–08/02

9T57544511D–RKE–08/02Output power variation for the full temperature rangeTamb = -40°C to +85°C,VS = 3.0 VVS = 2.0 VDPRefDPRef-1.5-4.0dBdBOutput power

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