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M-8870, M-8870-01S, M-8870-01SM

Table of contents:
Info of M-8870
Info of M-8870-01S
Info of M-8870-01SM

M-8870, M-8870-01S, M-8870-01SM Selling Leads, Datasheet

MFG:MT Package Cooled:DIP18 D/C:New

M-8870, M-8870-01S, M-8870-01SM Datasheet download

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Part Number: M-8870

MFG: MT

Package Cooled: DIP18

D/C: New

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M-8870 General Description

The M-8870 is a full DTMF Receiver that integrates both bandsplit filter and decoder functions into a single 18-pin DIP or SOIC package. Manufactured using CMOS process technology, the M-8870 offers low power consumption (35 mW max) and precise data handling. Its filter section uses switched capacitor technology for both the high and low group filters and for dial tone rejection. Its decoder uses digital counting techniques to detect and decode all 16 DTMF tone
pairs into a 4-bit code. External component count is minimized by provision of an on-chip differential input amplifier, clock generator, and latched tri-state interface bus. Minimal external components required include a low-cost 3.579545 MHz color burst crystal, a timing resistor, and a timing capacitor.

The M-8870-02 provides a "power-down" option which, when enabled, drops consumption to less than 0.5 mW. The M-8870-02 can also inhibit the decoding of fourth column digits (see Tone Decoding table on page 5).

M-8870 Maximum Ratings

Parameter	Symbol	Value
Power supply voltage (V_DD- V_SS)	V_DD	6.0 V max
Voltage on any pin	V_dc	V_SS -0.3 V, V_DD + 0.3 V
Current on any pin	I_DD	10 mA max
Operating temperature	T_A	-40 to +85
Storage temperature	T_S	-65 to +150

Note: Exceeding these ratings may cause permanent damage. Functional operation under these conditions is not implied.

M-8870 Features

• Low Power Consumption
• Adjustable Acquisition and Release Times
• Central Office Quality and Performance
• Power-down and Inhibit Modes (-02 only)
• Inexpensive 3.58 MHz Time Base
• Single 5 Volt Power Supply
• Dial Tone Suppression

M-8870 Typical Application

• Telephone switch equipment
• Remote data entry
• Paging systems
• Personal computers
• Credit card systems

M-8870 Connection Diagram

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