Product Summary
The LM1973M is a digitally controlled 3-channel 76dB audio attenuator fabricated on a CMOS process. Its logarithmic attenuation curve can be customized through software to fit the desired application. The LM1973M’s 3-wire serial digital interface is TTL and CMOS compatible; receiving data that selects a channel and the desired attenuation level. The Data-Out pin of the LM1973M allows multiple μPots to be daisy-chained together, reducing the number of enable and data lines to be routed for a given application. The applications of the LM1973M are Automated studio mixing consoles, Music reproduction systems, Sound reinforcement systems, Electronic music (MIDI), Personal computer audio control.
Parametrics
LM1973M absolute maximum ratings: (1)Supply Voltage (VDD–VSS):15V; (2)Voltage at Any Pin VSS:-0.2V to VDD + 0.2V; (3)Power Dissipation:150 mW; (4)ESD Susceptability:1800V; (5)Junction Temperature:150℃; (6)Soldering Information: N Package (10 sec.):+260℃; (7)Storage Temperature:-65℃ to +150℃.
Features
LM1973M features: (1)3-wire serial interface; (2)Daisy-chain capability; (3)104dB mute attenuation; (4)Pop and click free attenuation changes.
Diagrams
Image | Part No | Mfg | Description | Pricing (USD) |
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LM1973M |
National Semiconductor (TI) |
Attenuators (ICs) |
Data Sheet |
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LM1973M/NOPB |
National Semiconductor (TI) |
Attenuators (ICs) |
Data Sheet |
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LM1973MX |
National Semiconductor (TI) |
Attenuators (ICs) |
Data Sheet |
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LM1973MX/NOPB |
National Semiconductor (TI) |
Attenuators (ICs) |
Data Sheet |
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