ETL9444

ETL9444/ETL9445 ETL9344/ETL9345 4-BIT NMOS MICROCONTROLLERS . . . . . . . . . . . . . . . . . . LOW COST POWERFUL INSTRUCTION SET 2k x 8 ROM, 128 x 4 RAM 23 I/O LINES (ETL9444) TRUE VECTORED INTERRUPT, PLUS RESTART THREE-LEVEL SUBROUTINE STACK 16µs INSTRUCTION TIME SINGLE SUPPLY OPERATION (4.5-6.3V) LOW CURRENT DRAIN (13mA max.) INTERNAL TIME-BASE COUNTER FOR REALTIME PROCESSING INTERNAL BINARY COUNTER REGISTER WITH MICROWIRE® SERIAL I/O CAPABILITY GENERAL PURPOSE AND TRI-STATE® OUTPUTS LSTTL/CMOS COMPATIBLE IN AND OUT DIRECT DRIVE OF LED DIGIT AND SEGMENT LINES SOFTWARE/HARDWARE COMPATIBLE WITH OTHER MEMBERS OF ET9400 FAMILY EXTENDED TEMPERATURE RANGE DEVICES ETL9344/L9345 (– 40°C to + 85°C) WIDER SUPPLY RANGE (4.5 – 9.5V) OPTIONALLY AVAILABLE SOIC 24/28 AND PLCC 28 PACKAGES AVAILABLE ETL9444/ETL9344 N (Plastic Package) ETL9345/ETL9345 N (Plastic Package) PIN CONNECTION DESCRIPTION The ETL9444/L9445 and ETL9344/L9345 SingleChip N-Channel Microcontrollers are fully compatible with the COPS® family, fabricated using N-channel, silicon gate XMOS technology. They are complete microcomputers containing all system timing, internal logic, ROM, RAM and I/O necessary to implement dedicated control functions in a variety of applications. Features include single supply operation, a variety of output configuration options, with an instruction set, internal architecture and I/O scheme designed to facilitate keyboard input, display output and BCD data manipulation. The ETL9445 is ...