8259A

Features:

8086 8088 Compatible
MCS-80 MCS-85 Compatible
Eight-Level Priority Controller
Expandable to 64 Levels
Programmable Interrupt Modes
Individual Request Mask Capability
   -Single +5V Supply (No Clocks)
   -Available in 28-Pin DIP and 28-Lead PLCC Package_{(See Packaging Spec Order231369)}
Available in EXPRESSS
   -tandard Temperature Range
   -Extended Temperature Range


Pinout




Specifications

Ambient TemperatureUnderBias............. 0to+7.0
Storage Temperature ........................-65to +150
Voltage on Any Pin
    with RespecttoGround......................... 0.5V to 7V
Power Dissipation ...............................................1W

NOTICE This is a production data sheet The specifi-cations are subject to change without notice
WARNING Stressing the device beyond the ''Absolute Maximum Ratings'' may cause permanent damage These are stress ratings only Operation beyond the''Operating Conditions'' is not recommended and ex-tended exposure beyond the ''Operating Conditions''may affect device reliability


Description

The Intel 8259A Programmable Interrupt Controller handles up to eight vectored priority interrupts for the CPU 8259A is cascadable for up to 64 vectored priority interrupts without additional circuitry It is packaged in a 28-pin DIP uses NMOS technology and requires a single +5V supply Circuitry is static requiring no clock input

The 8259A is designed to minimize the software and real time overhead in handling multi-level priority inter-rupts It has several modes permitting optimization for a variety of system requirements

The 8259A is fully upward compatible with the Intel 8259 Software originally written for the 8259 will operate the 8259A in all 8259 equivalent modes (MCS-8085 Non-Buffered Edge Triggered)