Datasheet Details
| Part number | AF122 |
|---|---|
| Manufacturer | National Semiconductor (now Texas Instruments) |
| File Size | 128.64 KB |
| Description | DTMF Bandpass Filters |
| Download | AF122 Download (PDF) |
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Download the AF122 datasheet PDF. This datasheet also includes the AF121 variant, as both parts are published together in a single manufacturer document.
| Part number | AF122 |
|---|---|
| Manufacturer | National Semiconductor (now Texas Instruments) |
| File Size | 128.64 KB |
| Description | DTMF Bandpass Filters |
| Download | AF122 Download (PDF) |
|
|
|
The AF121 and AF122 are 6th order elliptic bandpass filters designed for use with digital DTMF detectors.
These filters are compatible with tone detector circuits such as the Rockwell CRC8030 and the Mostek MK5102 DTMF digital receivers.
The filters provide 40 dB separation between the high and low frequency signaling groups and the dial tone frequencies.
| Brand Logo | Part Number | Description | Manufacturer |
|---|---|---|---|
 |
AF122 | ANTI-SULFURATED CHIP RESISTORS | YAGEO |
| Part Number | Description |
|---|---|
| AF120 | Generalized Impedance Converter |
| AF121 | DTMF Bandpass Filters |
| AF100 | Universal Active Filter |
| AF101 | High Band Splitter Filter |
| AF102 | Dial Tone Reject Filter |
| AF103 | Low Band Splitter |
| AF104 | DTMF AGC Amplifier |
| AF105 | DTMF AGC Amplifier |
| AF132 | Dual PCM Transmit/Receive Filter |
| AF133 | PCM Transmit/Receive Filters |