The 8-bit microcontroller uses the M68HC05 CPU architecture and includes 1240 bytes of EPROM or one-time programmable ROM. It provides 64 bytes of user RAM, 14 bidirectional I/O lines, a 15-stage multifunction timer, and a COP watchdog. The device supports crystal, ceramic resonator, RC oscillator, and external clock operation. It operates from 3.3 V or 5.0 V supplies with maximum oscillator frequencies of 2.0 MHz at 3.3 V and 4.2 MHz at 5.0 V. Package options include 20-pin PDIP, SOIC, and ceramic DIP variants with commercial, extended, and automotive temperature ranges.
Checking distributor stock and pricing after the page loads.
Sign in to ask questions about the Motorola MC68HC705J1A datasheet using AI. Get instant answers about specifications, features, and technical details, ideal for finding information in larger documents.
Sign In to ChatWidest selection of semiconductors and electronic components in stock and ready to ship ™
| CPU core | M68HC05 8-bit CPU |
| Program memory | 1240 EPROM/OTPROMbytes |
| User RAM | 64bytes |
| Bidirectional I/O lines | 14 |
| Timer | 15-stage multifunction timer |
| Watchdog | COP watchdog |
| Operating supply voltage | 3.3 ±10% or 5.0 ±10%V |
| Maximum oscillator frequency at 5 V | 4.2MHz |
| Maximum oscillator frequency at 3.3 V | 2.0MHz |
| Maximum internal operating frequency at 5 V | 2.1MHz |
| Maximum internal operating frequency at 3.3 V | 1.0MHz |
| Operating temperature range | 0 to 70, -40 to 85, or -40 to 105 depending on order number suffix°C |
| I/O sink capability | 10 on PA4-PA7 at 5 VmA |
| Available package pin count | 20pins |
| Available packages | PDIP, SOIC, Cerdip |
| Maximum supply voltage rating | -0.3 to +7.0V |
| Storage temperature range | -65 to +150°C |
| EPROM programming voltage | 16.0 to 17.0V |
Download the complete datasheet for Motorola MC68HC705J1A to view detailed technical specifications.
The embedded preview will load automatically when this section scrolls into view.
These are design resources that include the Motorola MC68HC705J1A
Software UART implementation for Motorola MMC2001 microcontrollers using PWM timers and the M•CORE API for half-duplex serial communication up to 19,200 baud.
