MC68HC705B16NCFN

Product Summary

The MC68HC705B16NCFN is an OTPROM (one-time programmable ROM) version of the MC68HC05B16, meaning that once the application program has been loaded in the EPROM it can never be erased. The MC68HC705B16NCFN is a device similar to the MC68HC05B6, but with increased RAM and 15kbytes of EPROM instead of 6kbytes of ROM. In addition, the self-check routines available in the MC68HC705B16NCFN are replaced by bootstrap firmware.

Parametrics

MC68HC705B16NCFN absolute maximum ratings: (1)Supply Voltage: -0.5V to +7.0V; (2)Input Voltage: VSS-0.5V to VDD+0.5V; (3)input Voltage Self check mode: VSS-0.5V to 2VDD+0.5V; (4)Operating temperature range: 0℃ to 70℃; (5)Storage temperature range: -65℃ to +150℃; (6)Current drain per pin (excluding VDD and VSS) Source: 25mA; (7) Current drain per pin (excluding VDD and VSS) Sink: 45mA.

Features

MC68HC705B16NCFN 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; (15)Serial communications interface system (SCI) with independent transmitter/receiver baud rate selection; receiver wake-up function for use in multi-receiver systems; (16)8 channel A/D converter; (17)2 pulse length modulation systems which can be used as D/A converters; (18)One interrupt request input plus 4 on-board hardware interrupt sources; (19)Available in 52-pin plastic leaded chip carrier (PLCC), 64-pin quad flat pack (QFP) and 56-pinshrink dual in line (SDIP) packages; (20)Complete development system support available using the MMDS05 development station with the M68HC05B32EM emulation module; (21)Extended operating temperature range of -40℃ to +125℃.

Diagrams