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- Los microprocesadores 8X300 y 8X305, de Signetics, están fabricados en tecnología bipolar Schottky. Opera sobre datos de 8 bits, con un ciclo de instrucción de 250 ns, durante el cual lee el dato de memoria, lo enmascara y rota, realiza una operación en la ALU y lo reescribe en la memoria. Por esto son considerados por algunos autores como los precursores de los modernos DSP. Es curiosa su cápsula peculiar DIP de 50 patillas, disponible en plástico y cerámica. Necesita un transistor externo que, a partir de los 5 V nominales, le proporciona una tensión regulada para uso interno. Tanto su cápsula, como la cercanía de este transistor resultan característicos en cualquier diseño que incluya este microprocesador. Cuando Philips tomó el control de Signetics, continuó la fabricación de estos microprocesadores e incluso anunció otro nuevo, el 8X308, pero ya tarde y obtuvo escaso éxito. Cuando Philips cesó su fabricación, traspasó los derechos a Lansdale, que todavía fabrica el 8X305 para repuestos militares. (es)
- The 8X300 is a microprocessor produced and marketed by Signetics starting 1976 as a second source for the SMS 300 by Scientific Micro Systems, Inc. Although SMS developed the SMS 300, Signetics was the sole manufacturer of this product line. In 1978 Signetics purchased the rights to the SMS 300 series and renamed it 8X300. It was designed to be a fast microcontroller and signal processor, and because of this differs considerably from conventional NMOS logic microprocessors of the time. Perhaps the major difference was that it was implemented with bipolar Schottky transistor technology, and could fetch, decode and execute an instruction in only 250 ns.Data could be input from one device, modified, and output to another device during one instruction cycle. In 1982, Signetics released an improved and faster version, the 8X305. This processor went on to become very popular in military applications and was second-sourced by Advanced Micro Devices as the AM29X305. Eventually, production rights were sold to Lansdale Semiconductor Inc., who was still offering the 8X305 as of 2017. A clone of the 8X300 was manufactured in the Soviet Union under the designation KM1818VM01 (Russian: КМ1818ВМ01). (en)
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- Los microprocesadores 8X300 y 8X305, de Signetics, están fabricados en tecnología bipolar Schottky. Opera sobre datos de 8 bits, con un ciclo de instrucción de 250 ns, durante el cual lee el dato de memoria, lo enmascara y rota, realiza una operación en la ALU y lo reescribe en la memoria. Por esto son considerados por algunos autores como los precursores de los modernos DSP. (es)
- The 8X300 is a microprocessor produced and marketed by Signetics starting 1976 as a second source for the SMS 300 by Scientific Micro Systems, Inc. Although SMS developed the SMS 300, Signetics was the sole manufacturer of this product line. In 1978 Signetics purchased the rights to the SMS 300 series and renamed it 8X300. (en)
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