TX5003 RFM, TX5003 Datasheet - Page 4

• Manufacturer Part Number: TX5003
• Description: TRANSMITTER RF HYBRID
• Manufacturer: RFM

Specifications of TX5003

• Frequency: 303.825MHz
• Applications: General Purpose
• Modulation Or Protocol: ASK, OOK
• Data Rate - Maximum: 115.2kbps
• Power - Output: 1.5dBm
• Current - Transmitting: 9.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 3.7 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Other names: Q5426338

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©2008 by RF Monolithics, Inc.
The transmitter RF output power is proportional to the input current
to the TXMOD pin. A series resistor is used to adjust the peak
transmitter output power. 0 dBm of output power requires about
250 µA of input current.
Transmitter Mode Control
The three transmitter operating modes – transmit ASK, transmit
OOK, and power-down (sleep), are controlled by the Modulation &
Bias Control function, and are selected with the CNTRL1 and
CNTRL0 control pins. Setting CNTRL1 high and CNTRL0 low
place the unit in the ASK transmit mode. Setting CNTRL1 low and
CNTRL0 high place the unit in the OOK transmit mode. Setting
CNTRL1 and CNTRL0 both low place the unit in the power-down
mode. (Note that the resistor driving TXMOD must also be low in
the power-down mode to minimize power-down current.) CNTRL1
and CNTRL0 are CMOS compatible inputs. These inputs must be
held at a logic level; they cannot be left unconnected.
TXMOD
VCC1
GND1
GND2
E-mail: [e-mail]
NC
NC
NC
NC
NC
NC
SM-20L PCB Pad Layout
2
3
4
5
6
7
8
9
0.000
Transmitter Pin Out
.4600
Dimensions in inches
10
1
20
11
19
18
17
16
15
14
13
12
RFIO
GND3
CNTRL0
CNTRL1
VCC2
NC
NC
NC
NC
NC
.3825
.3575
.3175
.2775
.2375
.1975
.1575
.1175
.1025
.0775
Turn-On Timing
The maximum time required for either the OOK or ASK transmitter
mode to become operational is 5 ms after the supply voltage
reaches 2.2 Vdc. The total turn-on time to stable transmitter
operation for a 10 ms power supply rise time is 15 ms.
Sleep and Wake-Up Timing
The maximum transition time from either transmit mode to the
sleep mode (t
are both low (1 µs fall time).
The maximum time required to switch from the sleep mode to
either transmit mode (t
due to the start-up of the transmitter oscillator.
Dimension
A
C
D
G
H
A
B
E
F
TOS
B
10.795
9.525
1.778
3.048
0.381
0.889
3.175
1.778
Min
and t
SM-20L Package Drawing
STO
TAS
10.922
Nom
9.652
1.905
3.175
0.508
1.016
3.302
1.905
mm
) is 15 µs after CNTRL1 and CNTRL0
and t
STA
C
11.049
9.779
2.032
3.302
0.635
1.143
3.429
2.032
Max
) is 21 µs. Most of this time is
Min
.425
.375
.070
.120
.015
.035
.125
.070
G
Inches
Nom
.430
.380
.075
.125
.020
.040
.130
.075
TX5003 - 4/3/08
Page 4 of 6
D
Max
.435
.385
.080
.130
.025
.045
.135
0.80
E
F
H