LM1972N Overview
Additionally, there is a case included with the book as well. The mounting type recommended by the manufacturer is Through Hole. A 20-DIP (0.300, 7.62mm) case contains it. A 2 channel is present on the device. For your reference, this part contains Volume Control functions. Consumer Audio, Professional Audio can be used with the device. We supply it within 4.5V~12V. Using 0°C~70°C TA as a temperature range, this device operates. It has 20 terminations. A search for parts belonging to the LM1972 family will yield similar results. Refer to the device's specifications: 78dB. You can use CONSUMER CIRCUIT to sort consumer ICs on a part. In order to operate this part, the minimum supply voltage (Vsup) must not be less than 4.5V volts.
LM1972N Features
With 20-DIP (0.300, 7.62mm) channels
operate temperature at the range of 0°C~70°C TA
consumer IC type: CONSUMER CIRCUIT

LM1972N Applications
There are a lot of Texas Instruments
LM1972N Audio Special Purpose applications.

Digital Television
Musical Instruments
Recording Systems
High-End Audio/Sound Card for PC
Replacement of DIR1703
Other Applications Requiring S/PDIF Receiver
Audio Differential Line Drivers
Audio Mix Consoles
Distribution Amplifiers
Graphic and P arametric Equalizers

Mounting Type	Through Hole
Package / Case	20-DIP (0.300, 7.62mm)
Surface Mount	NO
Operating Temperature	0°C~70°C TA
Packaging	Tube
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Number of Terminations	20
Applications	Consumer Audio, Professional Audio
Voltage - Supply	4.5V~12V
Terminal Position	DUAL
Base Part Number	LM1972
Function	Volume Control
Supply Voltage-Min (Vsup)	4.5V
Number of Channels	2
Interface	SPI
Specifications	78dB
Consumer IC Type	CONSUMER CIRCUIT
Height Seated (Max)	5.08mm
RoHS Status	Non-RoHS Compliant
Lead Free	Contains Lead