Description:

VL82C203 PC/AT-Compatible Address Buffer

The VL82C203 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 24 mA (60 '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. Onchip refresh circuitry supports both 256K-bit and 1M-bit DRAMS. The VL82C203 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 VL82C203 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 20 MHz system clock
• Device is available as "cores" for user-specific designs
• Designed in CMOS for low power consumption