LC737212 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LC737212

Telephone Dialer IC with On-Chip Memory for PushButton Telephones

SANYO -> Panasonic 

LC737212, 737212M

• SP-CTL

This pin provides the speaker reception control output. This output is set on during the on-hook dialing, monitor, and

hold states. This is a complementary output.

• DTMF

The DTMF output pin. This is an npn emitter-follower output.

• MUTE2

The DTMF muting output. This output is turned on in synchronization with the DTMF output. This is an n-channel

open-drain output. The wired OR with the MUTE1 output can be taken.

• MUTE1

The DP and K-TONE muting output. This output is turned on in synchronization with the dialing pulse and K-TONE

outputs. This is an n-channel open-drain output. The wired OR with the MUTE2 output can be taken.

• S-OUT

The serial data output. This pin is used to output the internal status of the LC737212/M and the keypad data. This is an

n-channel open-drain output.

• DP

The dialing pulse output. This is an n-channel open-drain output.

• K-TONE

This pin outputs the key input confirmation tone (1036 Hz, 31 ms) and the memory store confirmation tone (2073 Hz,

279 ms). This is a complementary output.

• HOOK-CTL

The circuit control output. A high level is output when the circuit is connected. This is a complementary output.

• HOLD-OUT

The hold control output. A high level is output during a hold. This is a complementary output.

• XIN and XOUT

The oscillator connection pins. Connect a 3.579545-MHz oscillator element. No other external components are

required if a crystal oscillator element with built-in feedback resistor and capacitor components is used. Two 30-pF

capacitors are required if a ceramic resonator is used.

• R1 to R5 and C1 to C8

The keypad connections.

• VDD and VSS

The power supply connections.

No. 5203-10/27

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