Before revision: + Texas Instruments prefixes for TTL temperature ranges Prefix Name Temperature range Status 54 Military -55 °C to +125 °C In production 64 Industrial -40 °C to +85 °C Obsolete, very rare 74 Commercial 0 °C to +70 °C In production, extremely common Today, surface-mounted CMOS versions of the 7400 series are used in various applications in electronics and for glue logic in computers and industrial electronics.
After revision: + Texas Instruments prefixes for TTL temperature ranges Prefix Name Temperature range Remarks 54 Military -55 °C to +125 °C In production 64 Industrial -40 °C to +85 °C Obsolete, very rare 74 Commercial 0 °C to +70 °C most common Today, surface-mounted CMOS versions of the 7400 series are used in various applications in electronics and for glue logic in computers and industrial electronics.