Product Summary

The MC68HC705B16CFN is a low-cost single chip microcomputer. The MC68HC705B16CFN contains an on-chip oscillator, CPU, RAM, ROM, EEPROM, A/D converter, pulse length modulated outputs, I/O, serial communications interface, programmable timer system and watchdog. The fully static design of the MC68HC705B16CFN allows operation at frequencies down to dc to further reduce the already low power consumption to a few micro-amps.

Parametrics

MC68HC705B16CFN absolute maximum ratings: (1)Supply voltage(1) VDD – 0.5 to +7.0 V; (2)Input voltage (Except VPP1) VIN VSS – 0.5 to VDD + 0.5 V; (3)Input voltage Self-check mode (IRQ pin only) VIN VSS: – 0.5 to 2VDD + 0.5 V; (4)Operating temperature range Extended: –40 to +85 ℃; (5)Storage temperature range TSTG: – 65 to +150 ℃; (6)Current drain per pin (excluding VDD and VSS) Source ID 25 mA; Sink IS 45 mA.

Features

MC68HC705B16CFN features: (1)Fully static design featuring the industry standard M68HC05 family CPU core; (2)On chip crystal oscillator with divide by 2 or a software selectable divide by 32 option (SLOW mode); (3)2.1 MHz internal operating frequency at 5V; 1.0 MHz at 3V; (4)High speed version available; (5)176 bytes of RAM; (6)5936 bytes of user ROM plus 14 bytes of user vectors; (7)256 bytes of byte erasable EEPROM with internal charge pump and security bit; (8)Write/erase protect bit for 224 of the 256 bytes EEPROM; (9)Self test/bootstrap mode; (10)Power saving STOP, WAIT and SLOW modes; (11)Three 8-bit parallel I/O ports and one 8-bit input-only port; (12)Software option available to output the internal E-clock to port pin PC2; (13)16-bit timer with 2 input captures and 2 output compares; (14)Computer operating properly (COP) watchdog timer.

Diagrams

MC68HC705B16CFN pin connection

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