MB89890

The MB89890 is designed as one kind of line of single-chip microcontroller that contains a great variety of peripheral functions such as dual clock control systems, 4-stage operating speed controller, DTMF signal generator, timer, PWM timer, serial interface, modem, A/D converter and external interrupt, as well as compact instruction set.

Features of the MB89890 are:(1)dual clock control system;(2)maximum memory size: 64 Kbytes;(3)minimum execution time: 0.5 ms at 8 MHz;(4)interrupt processing time: 4.5 ms at 8 MHz;(5)I/O ports: max. 85 ports;(6)21-bit time-base counter;(7)8-bit PWM timer;(8)DTMF generator;(9)8/16-bit timer;(10)8-bit serial I/O;(11)A/D converter;(12)modem timer (pulse-width counter);(13)serial I/O with 1-byte buffer;(14)modem signal output.

The absolute maximum ratings of the MB89890 can be summarized as:(1)power supply voltage:Vss-0.3 to Vss+7.0 V;(2)output voltage:Vss-0.3 to Vcc+0.3 V;(3)"L" level maximum output current:20 mA;(4)"L" level average output current:10 mA;(5)"L" level total maximum output current:120 mA;(6)"L" level total average output current:40 mA;(7)"H" level maximum output current:-20 mA;(8)"H" level average output current:-10 mA;(9)storage temperature:-55 to +150 °C;(10)operating temperature:-20 to +85 °C;(11)power consumption:200 mW. If you want to know more information such as the electrical characteristics about the MB89890, please download the datasheet in www.seekic.com or www.chinaicmart.com.