In order to protect the op amps, a PDIP case is used. It has 8 pins that make up the linear amplifier. It is recommended that the temperature of this op amp ic should not fall below 0°C degrees Fahrenheit at any time. Linear amplifier shouldn't be used above 70°C degrees.
SG3549M Features
SG3549M Applications
There are a lot of Microsemi SG3549M Instrumentational OP Amps applications.