LV2256PTT

No.A0338-3/5

Pin Functions

Pin No.

Pin

Function

1

F/A

FSK/ASK mode switching. Low: FSK, high: ASK

2

MODIN

Modulation signal input

3

FSKSW

FSK modulation external capacitor switching input

4

XIN

Crystal oscillator connection

5

PWS

Power saving mode control. Low: Normal operation, high: power saving mode

6

PCONT

Transmitter output level adjustment external resistor connection

7

GND

GND

8

PAOUT

Transmitter output

9

VCC

VCC

10

NC

Unused pin

Block Diagram and Pin Assignment

MODIN

FSKSW

XIN

PWS

X tal

OSC

PHASE

DET

1/32

2

3

4

5

10

8

7

6

PCONT

GND

PAOUT

VCC

PA

LOOP

FILTER

VCO

CHARGE

PUMP

1

9

1/2

NC

F/A

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LV2256PTT