Description:

VL82C103 PC/AT-Compatible Address Buffer

Note: The VL82C103A is a somehow updated version released in '89.

The VL82C103A PC/AT-Compatible Address Buffer provides the system with a 16- bit address bus input from the CPU to 41 buffered drivers. The buffered drivers consist of 17 bidirectional system bus drivers, each capable of sinking 20 mA (50 'LS loads) of current and driving 200 pF of capacitance on the backplane; 16 bidirectional peripheral bus drivers, each capable of sinking 8 mA (20 'LS loads) of current; and eight memory bus drivers, also capable of sinking 8 mA of current. On-chip refresh circuitry supports both 256K-bit and 1M-bit DRAMS. The VL82C103A provides addressing for the I/O slots as well as the system.

The device is manufactured with VLSI's advanced high-performance CMOS process and is available in JEDEC-standard 84-pin plastic leaded chip carrier (PLCC) package. The VL82C103A is part of the PC/AT-compatible chips sets available from VLSI.

• Fully compatible with IBM PC/AT-type designs
• Completely performs address buffer function in IBM PC/AT-compatible systems
• Replaces several buffers, latches and other logic devices
• Supports up to 12 MHz system clock
• Device is available as "cores" for user-specific designs
• Designed in CMOS for low power consumption