PT4450L中文资料
DESCRIPTION
PT4450 is a high performance ASK/OOK transmitter for the Remote Keyless Entry (RKE) systems. It consists of a SAW oscillator, power amplifier, and one-shot circuit which control the SAW oscillator and power amplifier.
FEATURES
?Highly integrated ASK/OOK transmitter
?High output power, 3V/+10dBm/18mA
?Low supply voltage (2.2V to 3.6V operation range)
?Low external component cost.
?SAW-based oscillator, frequency range from 250MHz to 500MHz
?On-chip one-shot circuit
?50dB RF on/off ratio
?Available in 6 pins, SOT-23 package
APPLICATIONS
?Keyless entry systems
?Remote control systems
?Garage door openers
? Alarm systems
? Security systems
?Wireless sensors
BLOCK DIAGRAM
PIN CONFIGURATION
PIN DESCRIPTION
Pin Name I/O Description Pin No.
output 1
Oscillator
OSCOUT O
connection 2 VSS G
Ground
PAOUT O Power amplifier output 3
DIN I Data input, it will also be used to enable the chip 4
supply 5
Power
VDD P
input 6 OSCIN I
Oscillator
DIE PAD DIAGRAM
ABSOLUTE MAXIMUM RATINGS
(V SS=0V)
Parameter Symbol Rating Unit Supply voltage V DD V SS -0.3 to V SS +6.0 V
Operating temperature Topr -40 to +85 ℃
Storage temperature Tstg -65 to +150 ℃
Soldering temperature T SLD 255 ℃
Soldering time t SLD 10 Sec. RECOMMEND OPERATING CONDITIONS
(V SS=0V)
Rating
Unit
Parameter Symbol
Min. Typ. Max.
Supply voltage range V DD 2.2 3.0 3.6 V
Operating temperature T A -40 25 85 ℃
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, V DD=3.0V, V SS=0V, DIN=3.0V. Temp=27℃, f RF=434MHz)
Rating
Parameter Symbol Condition
Min. Typ.Max.
Unit DC
Supply voltage V DD 2.2 3.0 3.6 V
Operating current (Note)I DD DIN=High(CW mode);
P OUT=10dBm
16 - 18 mA
Standby current I standby DIN
=Low; T DELAY>50ms- - 1 μA
RF
Frequency range f RF250 - 500MHz
Power amplifier output power (Note)P out- +10 - dBm
RF power on/off ratio P EXT -
50
-
dB Phase noise P NOISE 10KHz
offset -
-100-
dBc/Hz
Harmonics (see Note) P HARM 2x/3x
f RF- -40 - dBc
Data Input and One Shot
Data rate D RATE0.5
2
50
Kbps
Start up time T ON-
-
200μs
One shot delay time T DELAY 50
-
-
ms Note: Depend on power amplifier output matching.
TESTING CIRCUIT
Values
Unit
Component
315MHz Band 434MHz Band
S1
315 434 MHz (see Note)
R1 0 0 ?
R2 10K 10K ?
R3 470K 470K ?
L1 180n 180n H
L2 27n 27n H
C1 220p 220p F
C2 12p 4.7p F
C3 22p 12p F
C4, C5 100n 100n F
Note: S1 is a SAW resonator.
ORDER INFORMATION
Valid Part Number Package Type Top Code
PT4450 (L) 6 Pins, SOT-23 PT4450 Notes:
1. (L), (C) or (S) = Lead Free
2. The Lead Free mark is put in front of the date code
PACKAGE INFORMATION 6 PINS, SOT-23
Symbol Min. Typ. Max.
1.45
A - -
0.15
A1 0 -
1.30
1.15
A2 0.90
b 0.30 - 0.50
0.45
0.40
b1 0.30
c 0.08 - 0.22
0.13
0.20
c1 0.08
BSC.
D 2.90
BSC.
E 2.80
BSC.
E1 1.60
e 0.95
BSC.
BSC.
e1 1.90
0.60
L 0.30
0.45
REF.
L1 0.60
BSC.
L2 0.25
R 0.10 - -
R1 0.10 - 0.25
θ0°4°8°
θ1 5° 10° 15°
aaa 0.15 bbb 0.20 ccc 0.10 ddd 0.20
Notes:
1. Dimension and tolerancing per ASME Y14.5M-1994.
2. Dimension in Millimeters.
3. Dimension D does not include mold flash, protrusion or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.25mm per end. Dimension E1 does not include interlead flash or
protrusion. Interlead flash or protrusion shall not exceed 0.25mm per side. D and E1 dimensions are determined at datum H.
4. The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. D and E1 dimensions are determined at datum H.
5. Datums A & B to be determined at datum H.
6. These dimensions apply to the flat section of the lead between 0.08mm and 0.15mm from the lead tip.
7. Dimension “b” does not include dambar protrusion. Allowable dambar protrusion shall be 0.08mm total in exceed of the “b” dimension at maximum material condition. The dambar cannot be located on the lower radius of the foot. Minimum space between protrusion and an adjacent lead shall not be less than 0.07mm.
8. Details of the pin 1 identifier are optional, but must be located within the zone indicated.
9. Refer to JEDEC MO-178 Variation AB
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