MT8870DE (DTMF Signalling Receiever, 3.58MHz 3mA)
BD 4.500
The MT8870D/MT8870D-1 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tonepairs into a 4-bit code. External component count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.
Features
• Complete DTMF Receiver
• Low power consumption
• Internal gain setting amplifier
• Adjustable guard time
• Central office quality
• Power-down mode
• Inhibit mode
• Backward compatible with MT8870C/MT8870C-1
Applications
• Receiver system for British Telecom (BT) or
CEPT Spec (MT8870D-1)
• Paging systems
• Repeater systems/mobile radio
• Credit card systems
• Remote control
• Personal computers
• Telephone answering machine
Choose Quantity
Product Details
Specifications
| Attribute | Value |
|---|---|
| Operating Frequency | 3.58MHz |
| Fabrication Technology | CMOS |
| Typical Supply Current | 3mA |
| Mounting Type | Through Hole |
| Package Type | PDIP |
| Pin Count | 18 |
| Dimensions | 23.73 x 7.11 x 4.95mm |
| Length | 23.73mm |
| Width | 7.11mm |
| Height | 4.95mm |
| Maximum Operating Supply Voltage | 5.25 V |
| Maximum Operating Temperature | +85 °C |
| Minimum Operating Temperature | -40 °C |
| Minimum Operating Supply Voltage | 4.75 V |