NJM2537 查看數據表（PDF） - Japan Radio Corporation

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NJM2537

FM IF IC FOR PAGERS

Japan Radio Corporation  

NJM2537

■ TERMINAL FUNCTION

PIN NO. SYMBOL PIN VOLTAGE (V)

FUNCTION

1

OSC IN

Local Oscillator Input.

In case of using a crystal

1.38

oscillator, it is connected.

2

OSC OUT

20

MIX IN

Local Oscillator Output.

In case of using an external

0,68

oscillator, the external clock is

input.

Mixer input.

Input resistance is 5kΩ typical.

0.8

3

MIX OUT

Mixer output.

Output resistance is 2kΩ

typical.

0.7

5

IF IN

6

DEC

8

QUAD IN

Limiter amplifier input.

1.38

Input resistance is 2kΩ typical.

Decoupling for bias.

1.38

Input of quadrature detection

circuit.

A ceramic discriminator is

connected.

1.4

9

AF OUT

Demodulated signal Output.

0.16

EQUIVALENT CIRCUIT

-4-

Ver.2003-12-09

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