M-8870-02SM Clare Inc., M-8870-02SM Datasheet
M-8870-02SM
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M-8870-02SM Summary of contents
Page 1
... Description M-8870-01 18-pin plastic DIP M-8870-01SM 18-pin plastic SOIC M-8870-01SMTR 18-pin plastic SOIC, tape and reel M-8870-02 18-pin plastic DIP, power-down, option M-8870-02SM 18-pin plastic SOIC, power-down, option M-8870-02T 18-pin plastic SOIC, power-down option, tape and reel www.clare.com M-8870 DTMF Receiver 1 ...
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... Functional operation of the device at these or V -0.3, VDD +0.3 any other conditions beyond those indicated in the opera- SS tional sections of this data sheet is not implied. Exposure max the device to the absolute maximum ratings for an extend- -40° 85°C ed period may degrade the device and effect its reliability. ...
Page 3
... Before a decoded tone pair is registered, the receiver checks for a valid signal duration (referred to as char- acter-recognition-condition). This check is performed by an external RC time constant driven by ESt. A logic high on ESt causes VC (see block diagram on page 1) to rise as the capacitor discharges. Provided that sig- ...
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... A voltage less than VTSt frees the device to accept a new tone pair. The GT output acts to reset the external steering time constant, and its state is a function of ESt and the voltage on St. (See Common Crystal Connection on page 5). ...
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... C 941 1633 D ANY ANY ANY L = logic low logic high high impedance Differential Input Configuration Rev single-ended configuration, the input pins are connected as shown in the Single - Ended Input Configuration on page 3 with the op-amp connected for unity gain and V REF The Differential Input Configuration bellow permits ...
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... Minimum signal acceptance level is measured with specified maximum frequency deviation. 11. Input pins defined as IN+, IN-, and OE. 12. External voltage source used to bias V . REF 13. This parameter also applies to a third tone injected onto the power supply. 14. Referenced to Single - Ended Input Configuration on page 3. Input DTMF tone level at -28 dBm. 6 Symbol Min Typ* Max ...
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... Tone # detected, tone duration valid, tone decoded and latched in outputs (currently high impedance). (F) Acceptable dropout of tone # tone absent duration invalid, outputs remain latched. (G) End of tone # detected, tone absent duration valid, outputs remain latched until next valid tone. Explanation of Symbols VIN DTMF composite input signal ...
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... M-8870 Figure 9 Mechanical Dimensions 8 Tolerances for 18 - pin Dip Inches Min Max A - .210 A1 .015 b .014 .022 b2 .045 .070 C .008 .014 D .880 .920 E .300 .325 E1 .240 .280 e .100 BSC ec 0° 15° L .115 .150 Tolerances for 18 - pin Dip Inches Min Max A .0926 .1043 A1 ...
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... Clare’s product may result in direct physical harm, injury, or death to a person or severe property or environmental damage. Clare, Inc. reserves the right to discontinue or make changes to its products at any time without notice. Specification: DS-M-8870-R3 ©Copyright 2001, Clare, Inc. ...