NJM2537V 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJM2537V

FM IF IC FOR PAGERS

Japan Radio Corporation  

■ TERMINAL FUNCTION

PIN NO. SYMBOL PIN VOLTAGE (V)

FUNCTION

RSSI output

10

RSSI

0

11

LPF IN

Input of a low pass filter. It is

biased from AF-OUT (9pin)

through an external RC filter.

0.18

12

LPF OUT

7

FSK REF

13

BS

Output of a low pass filrter.

0.18

Reference input of a wave

shaping comparator.

0.18

An external capacitor is

connected.

Control of a battery saving

circuit.

Hi : active

Lo : suspended

-

14

CHARGE

Control of a quick charge /

discharge circuit.

Hi : Its circuit turns ON

-

Lo : Its circuit turns OFF

15

FSK OUT

Output of a wave shaping

circuit. The output signal is

inverted against LPF output

-

signal.

NJM2537

EQUIVALENT CIRCUIT

Ver.2003-12-09

-5-

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