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BU8874 The BU8874 from ROHM Semiconductor is a DTMF receiver IC designed for telephone answering machines. It converts DTMF signals into 4-bit binary serial data.
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BU8874

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Mfr Name: ROHM Semiconductor
ROHM Semiconductor
The BU8874 from ROHM Semiconductor is a DTMF receiver IC designed for telephone answering machines. It converts DTMF signals into 4-bit binary serial data.
✓ Total Stock: 6,898 pcs

BU8874 Available from 1 distributor

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6,898 pcs
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BU8874 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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BU8874 Description

Short technical summary and product information.

The BU8874 is a DTMF receiver integrated circuit manufactured by ROHM Semiconductor. This component is specifically designed for use in telephone answering machines, where it performs the function of converting dual-tone multi-frequency (DTMF) signals into a 4-bit binary serial data output. It features a wide dynamic range of 45dB, facilitated by an internal automatic gain control (AGC), eliminating the need for an external input amplifier.

 

The BU8874 operates with a supply voltage range of 4.75V to 5.25V and has a typical supply current of 2.2mA. The operating temperature range is specified from -10°C to 70°C. The IC supports guard time control via a host microcontroller and includes input pins with hysteresis on the ACK pin. It can utilize a 4.19MHz crystal resonator.

 

Packaged in an 8-pin DIP format with a 0.300" (7.62mm) pitch, the BU8874 is designed for through-hole mounting. Its compact size and integrated features make it suitable for space-constrained applications within telecommunication devices. The device also includes a power-down mode for reduced energy consumption when not actively receiving signals.

BU8874 Quick Information

Product Type: Interface IC
Canonical Name: BU8874 DTMF Receiver IC
Subcategory: DTMF Receiver

BU8874 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): Level 1
REACH Status: REACH Unaffected

BU8874 Features

  • DTMF receiver IC for telephone applications.
  • Wide 45dB dynamic range with internal AGC.
  • Outputs 4-bit binary serial data.
  • Compact 8-pin DIP through-hole package.
  • Operates from 4.75V to 5.25V supply.

BU8874 Applications

  • Used in telephone answering machines.
  • Converts DTMF signals to serial data.
  • Suitable for telecom interface applications.
  • Features wide dynamic range for input signals.

BU8874 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage for the BU8874?

The BU8874 has a nominal operating voltage of 5.0V, with a minimum of 4.75V and a maximum of 5.25V.

What is the dynamic range of the BU8874?

The dynamic range of the BU8874 is 45dB.

What is the operating temperature range for the BU8874?

The BU8874 operates in a temperature range of -10°C to 70°C.

What type of package is the BU8874 in?

The BU8874 is available in an 8-DIP (0.300", 7.62mm) package.

How is the BU8874 mounted?

The BU8874 is designed for through-hole mounting.

What is the typical supply current for the BU8874?

The typical supply current for the BU8874 is 2.2mA.

What is the output data format of the BU8874?

The BU8874 outputs data in 4-bit binary serial format.

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