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BU8307CF - Pulse / tone dialer

Description

(1) ROW1 to ROW4 and COL1 to COL4 These are the keyboard input pins.

They can be connected to a 3 4 (2 of 7) standard keypad, or a 4 4 keypad.

Key input becomes valid by either shorting a single ROW input and a single COL input, or setting a single ROW and a COL input to LOW at the same time.

Features

  • 1) The chip includes both a pulse and tone dialer, making it possible to dial in either pulse or tone mode. 2) A wide operating voltage range enables direct powering by line current. The voltage range guaranteed for both pulse and tone dialing is 2.5V to 5.5V. 3) A built-in memory enables redialing of up to 32 digits. Note: In tone mode, the memory itself uses one digit, so please be aware that a maximum of 31 digits can be redialed. 4) The chip conforms to the standards of Japan, AmeriFBlock di.

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Datasheet preview – BU8307CF

Datasheet Details

Part number BU8307CF
Manufacturer ROHM
File Size 292.96 KB
Description Pulse / tone dialer
Datasheet download datasheet BU8307CF Datasheet
Additional preview pages of the BU8307CF datasheet.

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Full PDF Text Transcription

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Communication ICs Pulse / tone dialer for telephone set BU8307CS / BU8307CF The BU8307CS and BU8307CF are large scale integrated circuits with a pulse dialer and tone dialer integrated on a single chip. These products are capable of dialing in either pulse or tone mode, and can redial up to 32 digits. FApplications Telephones and cordless telephones FFeatures 1) The chip includes both a pulse and tone dialer, making it possible to dial in either pulse or tone mode. 2) A wide operating voltage range enables direct powering by line current. The voltage range guaranteed for both pulse and tone dialing is 2.5V to 5.5V. 3) A built-in memory enables redialing of up to 32 digits. Note: In tone mode, the memory itself uses one digit, so please be aware that a maximum of 31 digits can be redialed.
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