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

LM1973M Connection Diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM1973M
LM1973M
National Semiconductor (TI)
Attenuators (ICs)
Data Sheet
0-180: $2.20
180-252: $1.98
252-504: $1.78
504-1008: $1.50
LM1973M/NOPB
LM1973M/NOPB
National Semiconductor (TI)
Attenuators (ICs)
Data Sheet
0-1: $3.02
1-25: $2.43
25-100: $2.21
100-250: $2.00
LM1973MX
LM1973MX
National Semiconductor (TI)
Attenuators (ICs)
Data Sheet
0-1000: $1.50
1000-3000: $1.42
3000-5000: $1.36
LM1973MX/NOPB
LM1973MX/NOPB
National Semiconductor (TI)
Attenuators (ICs)
Data Sheet
0-605: $1.79
605-1000: $1.43
1000-5000: $1.38