LA1837(1997) Ver la hoja de datos (PDF) - SANYO -> Panasonic

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LA1837
(Rev.:1997)

Single-Chip Home Stereo IC with Electronic Tuning Support

SANYO -> Panasonic 

LA1837

Coil Specifications

· AM oscillator (for the DUT)

HW-50425 (Mitsumi Electric Co., Ltd.)

Ž -  2T

 - ‘ 9T

 - Œ 86T

QO ≥ 80

L = 270 µH

· FM detector

600BEAS-9715Z (The Toko Electric Corporation)

Ž - Œ 22T

f = 10.7 MHz

QO = 40

Includes an internal

82-pF capacitor.

· IFT

YD-1073-1 (Mitsumi Electric Co., Ltd.)

Œ -  58T

 - ‘ 7T

 - Ž 94T

fO = 450 kHz

QO = 110

Includes an internal

180-pF capacitor.

SFU450B included.

Pin Functions

Pin No.

Pin function

Pin voltage (V)

Pin description

1

FM IF input

Vreg

Input impedance ri = 330 Ω

Equivalent circuit

2

AM mixer output

Connect the mixer coil between this pin and

VCC

VCC.

3

FM IF input bypass

Vreg

Also functions as the MPX regulator filter.

4

AM IF input

5

GND

6

7

TU - LED

ST - LED

AM-IF output

8

VCC

9

FM detector

Vreg

Input impedance ri = 2 kΩ

0V

Active low

VCC

Open collector output

AM stereo IF output (pin 7)

VCC

The current input must not exceed 150 µA.

VCC

Recommended detector coil: 600BEAS-

VCC

9715Z

(The Toko Electric Corporation)

See pin 1.

Continued on next page.

No. 5688-4/9

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