LV2257PTT Datasheet, PDF (3/5 Pages) Sanyo Semicon Device – Bi-CMOS IC 434MHz Band FSK/ASK Wireless Transmitter IC

Pin Functions
Pin No.
Pin
1
F/A
2
MODIN
3
FSKSW
4
XIN
5
PWS
6
PCONT
7
GND
8
PAOUT
9
VCC
10
NC
LV2257PTT
Function
FSK/ASK mode switching. Low: FSK, high: ASK
Modulation signal input
FSK modulation external capacitor switching input
Crystal oscillator connection
Power saving mode control. Low: Normal operation, high: power saving mode
Transmitter output level adjustment external resistor connection
GND
Transmitter output
VCC
Unused pin
Block Diagram and Pin Assignment
F/A 1
LV2257PTT
10 NC
MODIN 2
9 VCC
FSKSW 3
VCO
PA
8 PAOUT
XIN 4
X tal
1/2
OSC
PWS 5
1/32
PHASE
DET
LOOP
FILTER
CHARGE
PUMP
7 GND
6 _PCONT
Top view
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