2 layers69 × 28.5 mm
GR DTMF Decoder
GadgetReboot/DTMF_Decoder
MT8870 DTMF decoder for POTS phone line interfacing
15 parts9
Overview
The MT8870DS1 is a telecommunication Interface IC made by Microchip Technology in a SOIC-18-300mil package with 18 pins. -40℃~+85℃ 15mW 4.75V~5.25V 9mA SOIC-18-300mil Telecom Interface ICs ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:MT8870DSR1, from EasyEDA) and its footprint (Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm, from KiCad's library), ready for a KiCad board. 143 are in stock at JLCPCB (part C1522188). 2 open-source boards in 2 repositories on GitHub use it.
Symbol
Footprint
Parameters
6- Current - Supply
- 9mA
- Features
- DTMF detection
- Operating Temperature
- -40℃~+85℃
- Power(Watts)
- 15mW
- Type
- DTMF Transceiver
- Voltage - Supply
- 4.75V~5.25V
Order codes
1- MT8870DS1LCSC C1522188
Pinout
18| Pin | Name | Type |
|---|---|---|
| 1 | IN+ | Unspecified |
| 2 | IN | Unspecified |
| 3 | GS | Unspecified |
| 4 | VRef | Unspecified |
| 5 | INH | Unspecified |
| 6 | PWDN | Unspecified |
| 7 | OSC1 | Unspecified |
| 8 | OSC2 | Unspecified |
| 9 | VSS | Unspecified |
| 10 | TOE | Unspecified |
| 11 | Q1 | Unspecified |
| 12 | Q2 | Unspecified |
| 13 | Q3 | Unspecified |
| 14 | Q4 | Unspecified |
| 15 | StD | Unspecified |
| 16 | ESt | Unspecified |
| 17 | St/GT | Unspecified |
| 18 | VDD | Unspecified |
Open-source boards using it
All 2- 2 layers49 × 82.3 mm
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<iframe src="https://pcbkit.io/embed/parts/microchip/MT8870DS1" title="MT8870DS1 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/microchip/MT8870DS1.jpg" alt="MT8870DS1" width="1200" height="900">[](https://pcbkit.io/parts/microchip/MT8870DS1)Questions
Is there a KiCad symbol and footprint for the MT8870DS1?
Yes. The symbol is EasyEDA_Cloud:MT8870DSR1 and the footprint Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the MT8870DS1?
SOIC-18-300mil, with 18 pins. Its footprint is drawn on this page.
Where is the MT8870DS1 datasheet?
Microchip Technology publishes it: the Datasheet link on this page opens it.
Where can I order the MT8870DS1?
JLCPCB lists it as part C1522188, with 143 in stock; the sellers' links on this page open their listings.
What can replace the MT8870DS1?
Parts like it in the library: the MT8870DSR1 by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MT8870DS1?
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
