HLC705KJ

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HLC705KJ Technical Summary

Overview

The HLC705KJ is a high-performance microcontroller from the Motorola MC68HC705 family, designed for embedded control applications. It features a robust architecture with integrated memory, I/O capabilities, and multiple peripheral modules, making it suitable for a wide range of industrial and consumer applications. The microcontroller operates at an internal frequency of 4.0 MHz at 5.0 V and includes EPROM/OTPROM for program storage, RAM for data handling, and a variety of built-in peripherals.

Features

• Robust Noise Immunity: Designed for reliable operation in electrically noisy environments.
• High-Speed Operation: 4.0 MHz internal operating frequency at 5.0 V.
• Memory:
  • 1240 bytes of EPROM/OTPROM, including 8 bytes for user vectors.
  • 64 bytes of user RAM.
• Peripheral Modules:
  • 15-stage multifunction timer.
  • Computer Operating Properly (COP) watchdog timer.
• I/O Capabilities:
  • 10 bidirectional I/O lines with 10 mA sink capability on all pins.
  • Software-programmable pulldowns on all I/O pins.
  • Keyboard scan functionality with selectable interrupt on four I/O pins.
  • 5.5 mA source capability on six I/O pins.
• Interrupt Handling: Selectable sensitivity on external interrupt (edge- and level-sensitive or edge-sensitive only).
• On-Chip Oscillator: Supports crystal, ceramic resonator, or resistor-capacitor (RC) configurations.

Applications

The HLC705KJ is ideal for a variety of embedded control applications, including:

• Consumer electronics (remote controls, toys, home appliances).
• Industrial automation (sensors, motor control, small-scale controllers).
• Automotive systems (basic control modules, dashboard interfaces).
• Low-power portable devices (battery-operated gadgets, wearables).

Electrical Characteristics

Operating Conditions

• Supply Voltage: 5.0 V ±10% (standard operation).
• Operating Temperature Range: -40°C to +85°C (industrial grade).
• Power Consumption: Optimized for low-power modes (Stop, Wait, and Data-Retention modes).

DC Electrical Specifications

• Input High Voltage (V_IH): 2.0 V min (at 5.0 V supply).
• Input Low Voltage (V_IL): 0.8 V max (at 5.0 V supply).
• Output High Voltage (V_OH): 4.2 V min (I_OH = -5.5 mA).
• Output Low Voltage (V_OL): 0.4 V max (I_OL = 10 mA).

Timing Characteristics

• Clock Frequency: 4.0 MHz max (internal operation).
• Instruction Cycle Time: 1 µs (at 4.0 MHz).
• Reset Pulse Width: 1.5 µs min.

Package Information

The HLC705KJ is available in multiple package options to suit different application requirements:

• 20-Pin Plastic Dual Inline Package (PDIP): Industry-standard through-hole package.
• 20-Pin Small Outline Integrated Circuit (SOIC): Surface-mount package for space-constrained designs.
• 20-Pin Shrink Small Outline Package (SSOP): Compact surface-mount option.

Pin Configuration

The 20-pin layout includes:

• Power Pins: V_DD (supply voltage), V_SS (ground).
• Clock Pins: OSC1, OSC2 (for external crystal/resonator or RC network).
• I/O Ports: Port A (8-bit bidirectional), Port B (2-bit bidirectional).
• Control Pins: RESET (active-low reset), IRQ (external interrupt).

Additional Resources

For further details, refer to the official Motorola MC68HC705KJ1 documentation, including:

• Full datasheets and application notes.
• Programming guides for EPROM/OTPROM.
• Reference designs for typical applications.

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