Datasheet4U Logo Datasheet4U.com

BU8874F - DTMF receiver for telephones

Description

203 Communication ICs FInput / output circuits INPUT PWDN BU8874 / BU8874F OSC ACK SD ESt 204 Communication ICs FElectrical characteristics (unless otherwise noted, Ta=25_C, VDD=5.0V) BU8874 / BU8874F 205 Communication ICs FCircuit operation (1) An overview of operation A DTMF signal is

Features

  • 1) Dynamic range of 45dB. (internal AGC) 2) Power down mode. 3) 4-bit binary serial data output. 4) Guard time can be controlled through host microcontroller. 5) Input pins equipped with hysteresis. (ACK pin) FBlock diagram 6) 4.19MHz crystal resonator can be used. 7) 8-pin DIP package. (BU8874) 202 Communication ICs FAbsolute maximum ratings (Ta=25_C) BU8874 / BU8874F FRecommended operating conditions (Ta=25_C) FPin.

📥 Download Datasheet

Datasheet preview – BU8874F

Datasheet Details

Part number BU8874F
Manufacturer ROHM
File Size 180.42 KB
Description DTMF receiver for telephones
Datasheet download datasheet BU8874F Datasheet
Additional preview pages of the BU8874F datasheet.

📁 Similar Datasheet

  • BU8877 - Call Progress Tone Decoder (ETC)
  • BU8877F - Call Progress Tone Decoder (ETC)
  • BU800 - NPN Transistor (INCHANGE)
  • BU801 - High Voltage Fast Darlington (ST Microelectronics)
  • BU806 - 8.0 AMPERE DARLINGTON NPN POWER TRANSISTORS (Motorola Inc)
  • BU806 - NPN Darlington Power Transistor (ON Semiconductor)
  • BU806 - MEDIUM VOLTAGE NPN TRANSISTORS (ST Microelectronics)
  • BU806 - Transistor (Fairchild Semiconductor)
  • BU806 - Silicon Darlington Power Transistors (Comset Semiconductors)
  • BU806 - Silicon NPN Transistor (NTE)
Other Datasheets by Rohm

Full PDF Text Transcription

Click to expand full text
Communication ICs DTMF receiver for telephones BU8874 / BU8874F The BU8874 and BU8874F are DTMF receiver ICs developed for use in telephone answering machines, and convert 16 different types of DTMF signals into 4-bit binary serial data. In addition to a compact 8-pin DIP (BU8874) package, these receivers feature a wide dynamic range, eliminating the need for an external input amplifier. Expertise from a number of companies has been incorporated into these products to enable guard time control through a host microcontroller. FApplications Telephone answering machines FFeatures 1) Dynamic range of 45dB. (internal AGC) 2) Power down mode. 3) 4-bit binary serial data output. 4) Guard time can be controlled through host microcontroller. 5) Input pins equipped with hysteresis.
Published: |