CRT9212

CRT9212 is a vintage Double Row Buffer (DRB) integrated circuit primarily manufactured by Standard Microsystems Corporation (SMC/SMSC). It was widely used in early computer terminal display systems and printers to manage character data streams. 

Technical Functionality

The CRT9212 acts as a high-speed buffer to synchronize data between a central processor and a display or printing device. 

• Double Row Buffer (DRB): It contains two independent buffers, typically used to store rows of character data. While one row is being displayed on a screen (or printed), the next row of data can be loaded into the second buffer, preventing screen flickering or data bottlenecks.
• Memory Capacity: It is specifically identified as a 135-character row buffer memory.
• Technology: Built using MOS (Metal-Oxide-Semiconductor) technology.

Physical Specifications

The IC features the following physical attributes:

• Package Type: 28-pin Dual In-line Package (DIP28 or CDIP28).
• Pin Count: 28 terminals.
• Temperature Range: Commercial grade, operating between 0°C and 70°C.
• Mounting: Through-hole mounting (Non-surface mount).

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