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LV2257PTT Datasheet, PDF (4/5 Pages) Sanyo Semicon Device – Bi-CMOS IC 434MHz Band FSK/ASK Wireless Transmitter IC
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LV2257PTT
Application Circuit Example 1: FSK Specifications
FSK/ASK switching
(L:FSK/H:ASK)
MODIN
max 20kHz,3Vp-p
X tal
27.12MHz
1
10
2
9
3
VCO PA 8
4 X tal
OSC
1/2
LOOP
1/32 FILTER
7
5
PHASE
CP
DET
6
POWER SAVE
(Low: Normal operation, high: power saving mode)
3V
Matching
circuit
433.92MHz
Transmitter output level
adjustment
Application Circuit Example 2: ASK Specifications
FSK/ASK switching
(L:FSK/H:ASK)
MODIN
max 20kHz,3Vp-p
X tal
27.12MHz
1
10
2
9
3
VCO PA 8
4 X tal
OSC
1/2
LOOP
1/32 FILTER
7
5
PHASE
CP
DET
6
POWER SAVE
(Low: Normal operation, high: power saving mode)
3V
Matching
circuit
433.92MHz
Transmitter output level
adjustment
No.A0339-4/5
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