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ETL9445 Datasheet(PDF) 1 Page - STMicroelectronics |
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ETL9445 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 27 page  ETL9444/ETL9445 ETL9344/ETL9345 May 1989 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 RES- TART . THREE-LEVEL SUBROUTINE STACK . 16 µs INSTRUCTION TIME . SINGLE SUPPLY OPERATION (4.5-6.3V) . LOW CURRENT DRAIN (13mA max.) . INTERNAL TIME-BASE COUNTER FOR REAL- TIME PROCESSING . INTERNAL BINARY COUNTER REGISTER WITH MICROWIRE ® SERIAL I/O CAPABILITY . GENERAL PURPOSE AND TRI-STATE® OUT- PUTS . 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 DE- VICES ETL9344/L9345 (– 40 °Cto + 85°C) . WIDER SUPPLY RANGE (4.5 – 9.5V) OPTIONALLY AVAILABLE . SOIC 24/28 AND PLCC 28 PACKAGES AVAI- LABLE N (Plastic Package) DESCRIPTION The ETL9444/L9445 and ETL9344/L9345 Single- Chip N-Channel Microcontrollers are fully compati- ble with the COPS ® family, fabricated using N-channel, silicon gate XMOS technology. They are complete microcomputers containing all system ti- ming, internal logic, ROM, RAM and I/O necessary to implement dedicated control functions in a variety of applications. Features include single supply ope- ration, a variety of output configuration options, with an instruction set, internal architecture and I/O scheme designed to facilitate keyboard input, dis- play output and BCD data manipulation. The ETL9445 is identical to the ETL9444, except with 19 I/O lines instead of 23 : They are an appropriate choice for use in numerous human interface control environments. Standard test procedures and relia- ble high-density fabrication techniques provide the medium to large volume customers with a customi- PIN CONNECTION ETL9345/ETL9345 N (Plastic Package) ETL9444/ETL9344 1/27 |
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