[NATIONAL HYBRID, Inc.]

INTRODUCTION
The NHi- RT is a low cost complete Multi-Protocol Mil- Std- Data Bus Interface between a dual redundant bus and a host processor. The device functions as a programmable Remote Terminal containing a protocol chip, two +5V monolithic transceivers and 16K word SRAM. The unit is available packaged in a 1.1" x 1.1" 69 pin ceramic PGA, or 1.1" x 1.1" 68 pin ceramic quad flatpack. The only external components required are two coupling transformers.
   
GENERAL FEATURES
• Mulit-Protocol Interface
• Single +5 volt supply.
• Operates from 10 Mhz clock.
• Contains two monolithic +5V transceivers
• Appears to host as a Dual Port Double Buffered 16K x 16 SRAM
• Footprint less than 1.00 square inches
• Ensures integrity of all shared data and control structures
• Built- in interrupt controller
• Internal FIFO is configurable to retain header information for queuing up to 6 pending interrupt
    requests plus an overflow interrupt, or as a 7 interrupt revolving FIFO
• Provides interrupt priority input and output pins for daisy- chaining interrupt requests
• Contains a Timer Unit which provides 32 bit RTC (Real- Time- Clock) with 1, 2, 4, 8, 16, 32 and
    64 uS internal, or user provided external clock resolution for data and event time tagging.
• Interfaces with an 8 bit discrete I/ O bus
• Selectable 768/ 672 us Failsafe Timer with complete Testability
• Low power CMOS technology