مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

The Am29821/823/825 bus interface registers are designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider address/data paths or buses carrying parity. The Am29821 is a buffered, 10-bit wide version of the popular '374/'534 functions. The Am29823 is a 9-bit wide buffered register with Clock Enable (EN) and Clear (CLR) - ideal for parity bus interfacing in high performance microprogrammed systems. The Am29825 is an 8-bit buffered register with all the '823 controls plus multiple enables (OE₁, OE₂, OE₃) to allow multiuser control of the interface, e.g., CS, DMA, and RD/WR. It is ideal for use as an output port requiring high IOL/IOH. All of the Am29800 high performance interface family are designed for high capacitance load drive capability while providing low capacitance bus loading at both inputs and outputs. All inputs are Schottky diode inputs, and all outputs are designed for low capacitance bus loading in the high impedance state.

Features

• High-speed parallel registers with positive edge-triggered D-type flip-flops
• Noninverting CP - Y tPD = 7.5 ns typ
• Inverting CP - Y tPD = 7.5 ns typ
• Buffered common Clock Enable (EN)
• Buffered common asynchronous Clear input (CLR)
• Three-state outputs glitch free during power-up and down
• Outputs have Schottky clamp to ground
• 48 mA Commercial IOL
• Low input/output capacitance - 6 pF inputs (typical), - 8 pF outputs (typical)
• Metastable “Hardened” Registers
• IOH specified at 2.0 V and 2.4 V
• 24-pin 0.3" space saving package
• IMOxTM high performance Implanted Oxide isolated process