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NXP Semiconductors MC705P6ACDWE
- Part No.:
- MC705P6ACDWE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC705P6ACDWE.pdf
- Description:
- IC MCU 8BIT 4.5KB OTP 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:626
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Product details
Overview
MC705P6ACDWE from Freescale Semiconductor is an 8-bit EPROM-based microcontroller in the M68HC05 family, featuring a 16-bit timer with input capture/output compare, 4-channel 8-bit ADC, SIOP serial interface, COP watchdog, 4672 bytes of user EPROM, 176 bytes RAM, and 21 I/O pins (20 bidirectional + 1 input-only) in a 28-pin SOIC package. It targets cost-sensitive embedded control applications such as appliance motor control and industrial sensor interfaces.
For engineers reviewing the MC705P6ACDWE datasheet, MC705P6ACDWE pinout, MC705P6ACDWE application, or MC705P6ACDWE equivalent, key selection considerations include its 5 V operation, mask-programmable MOR options (COP enable/disable, SIOP LSB/MSB order, STOP/HALT mode), EPROM security lockout, and bootloader ROM support for field programming.
Technical Context
The MC705P6ACDWE implements the M68HC05 CPU core with static design, supporting inherent, immediate, direct, extended, and indexed addressing modes. Its 16-bit timer supports both input capture (for pulse width/frequency measurement) and output compare (for PWM generation or timed interrupts), while the SIOP operates at programmable clock rates (OSC/8, /16, /32, or /64).
It integrates a ratiometric 4-channel 8-bit A/D converter with internal reference (VREFH) and supports low-power operation via STOP, HALT, and WAIT instructions - with COP watchdog reset recovery and mask option register (MOR) configuration for boot behavior, interrupt sensitivity, and security settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC05 8-bit CISC core with 176 bytes on-chip RAM and 239 bytes bootloader ROM |
| Memory | 4672 bytes user EPROM (including 48 B page zero + 16 B vectors); no external memory interface |
| ADC | 4-channel 8-bit ratiometric A/D converter with VREFH reference input and 53 µs typical conversion time |
| Timer | 16-bit free-running timer with one input capture channel and one output compare channel |
| Serial Interface | SIOP synchronous serial port with programmable MSB/LSB-first order and selectable clock dividers (OSC/8 to /64) |
| Supply Voltage | 5.0 V ±10% DC operation; VDD = 4.5–5.5 V, VSS = ground reference |
| Package | 28-pin Small Outline Integrated Circuit (SOIC), case 751F, 300 mil body width |
Pinout & Package
The MC705P6ACDWE is housed in a 28-pin SOIC (case 751F) package with 300 mil body width and standard 1.27 mm pitch. Pin functions are defined per Freescale's Advance Information Data Sheet Rev. 2.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | +5 V main supply rail; requires local 0.1 µF ceramic bypass capacitor |
| VSS | Ground | System ground reference; must be low-impedance connection to minimize noise |
| OSC1 / OSC2 | Oscillator inputs | Accept crystal, ceramic resonator, or external CMOS clock; generate internal bus clock (fop = fosc/2) |
| RESET | Active-low reset input | Asynchronous reset signal; drives MCU to known state on falling edge |
| IRQ/VPP | Interrupt request / EPROM programming voltage | Maskable interrupt input during normal operation; supplies 12.5 V VPP during EPROM programming |
| PA0–PA7 | Port A I/O | 8-bit bidirectional port with programmable pullups and key-scan interrupt capability |
| PB5/SDO, PB6/SDI, PB7/SCK | SIOP signals | Serial data output, input, and clock - shared with Port B pins |
| PC0–PC2, PC3/AD3–PC6/AD0, PC7/VREFH | Port C / ADC inputs | 6-bit I/O + 4-channel analog inputs (AD0–AD3); PC7 serves as ADC reference high |
| PD5, PD7/TCAP | Port D / Timer capture | 2-bit I/O; PD7 doubles as timer input capture trigger |
| TCMP | Timer compare output | Open-drain output driven by timer output compare event; requires external pullup |
Key Features
| Feature | Design Value |
|---|---|
| Mask Option Register (MOR) | Static configuration of COP enable/disable, SIOP bit order, STOP/HALT mode, and EPROM security lockout |
| Bootloader ROM | 239-byte factory-programmed ROM enabling in-system EPROM reprogramming via SIOP |
| Low-power modes | STOP (deep sleep, ~1 µA), HALT (CPU off, peripherals active), and WAIT (CPU clock gated) reduce system power consumption |
| High-current outputs | PC0 and PC1 support up to 20 mA sink current for direct LED or relay driving without external drivers |
| Input capture timing | 16-bit timer captures external event timestamps with bus-clock resolution (e.g., 250 ns at 4 MHz fop) |
Applications
| Home Appliance Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Microcontroller manages motor speed, temperature feedback, and user interface in washing machines or HVAC controllers. IC Role / Device Role / Timing Role: MC705P6ACDWE executes real-time control logic, reads thermistor/pressure sensor ADC values, and generates PWM via TCMP output. Use Value: Integrated 4-channel ADC and high-current PC0/PC1 outputs eliminate external signal conditioning and driver ICs, reducing BOM count. | Use Scenario: Local node acquires analog sensor data (e.g., pressure, humidity) and transmits via serial link to central PLC or gateway. IC Role / Device Role / Timing Role: MC705P6ACDWE acts as sensor front-end processor, performing ratiometric A/D conversion and framing data for SIOP transmission. Use Value: SIOP with programmable clock division (OSC/8 to /64) allows flexible baud rate matching to host controller without external UART. |
| Automotive Body Electronics | Consumer Remote Control Receiver |
Use Scenario: Controls interior lighting, window lift, or mirror adjustment using discrete switches and relays in 12 V automotive systems. IC Role / Device Role / Timing Role: MC705P6ACDWE monitors switch inputs on PA0–PA7 with key-scan interrupt, drives relays via PC0/PC1, and monitors battery voltage via ADC. Use Value: MOR-configurable key-scan pullups and interrupt-on-change eliminate external debounce circuitry and reduce firmware overhead. | Use Scenario: IR remote receiver decodes NEC or RC-5 protocols and triggers local actions (e.g., LED status, buzzer tone) in battery-powered devices. IC Role / Device Role / Timing Role: MC705P6ACDWE uses input capture on PD7/TCAP to measure IR carrier pulse widths and decode command frames in firmware. Use Value: Dedicated 16-bit input capture hardware enables precise timing measurement of sub-100 µs IR pulses without CPU polling or timer overflow interrupts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC705P6CDWE | Same core and peripherals but uses OTP (one-time programmable) ROM instead of EPROM; no VPP pin required | Suitable for production volumes where field reprogramming is unnecessary; eliminates need for 12.5 V programming supply | Select MC68HC705P6CDWE when EPROM reprogrammability is not required and lower system cost is prioritized |
| MC68HC705P9CDWE | Enhanced variant with 8 KB EPROM, additional I/O, and expanded timer features (two output compare channels) | Required for applications needing larger code space or dual PWM outputs; pinout differs (32-pin SOIC) | Choose MC68HC705P9CDWE only if 4672 bytes EPROM is insufficient or second output compare channel is needed |
Compared with MC68HC705P6CDWE, the MC705P6ACDWE offers field-erasable EPROM for iterative development and firmware updates, while MC68HC705P9CDWE provides greater memory and I/O at the cost of non-pin-compatibility and higher unit price.
Availability
MC705P6ACDWE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interface, and automotive body electronics requiring stable component supply across long-lifecycle designs.
Supply support for MC705P6ACDWE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in microcontrollers, analog, and connectivity solutions for automotive, industrial, and consumer markets.
The MC705P6ACDWE belongs to the M68HC05 microcontroller family, designed for cost-sensitive, low-power embedded control applications where integrated peripherals, small footprint, and field-programmable EPROM simplify system design and reduce bill-of-materials.
FAQ
What is the maximum operating frequency of the MC705P6ACDWE?
The MC705P6ACDWE operates with an external crystal, ceramic resonator, or clock source up to 4 MHz. The internal bus clock (fop) is derived as fosc/2, resulting in a maximum 2 MHz bus frequency. This timing governs instruction execution, timer increments, and ADC conversion rates as specified in Chapter 14 Electrical Specifications of the datasheet.
Does the MC705P6ACDWE support in-system programming?
Yes, the MC705P6ACDWE supports in-system programming via its built-in bootloader ROM. Using the SIOP serial interface and the 239-byte factory-programmed bootloader, users can reprogram the 4672-byte EPROM without removing the device from the PCB - provided the IRQ/VPP pin receives 12.5 V during programming cycles.
What are the power supply requirements for the MC705P6ACDWE?
The MC705P6ACDWE requires a regulated 5.0 V ±10% DC supply (4.5 V to 5.5 V) on VDD, with VSS as the ground reference. Decoupling with a 0.1 µF ceramic capacitor placed near the VDD pin is mandatory to suppress high-frequency noise caused by fast digital transitions.
How does the Mask Option Register (MOR) affect MC705P6ACDWE functionality?
The MOR is a one-time programmable register that configures critical runtime behaviors of the MC705P6ACDWE, including COP watchdog enable/disable, external interrupt sensitivity (edge- vs. edge-and-level), SIOP bit order (MSB/LSB first), timer stop mode (STOP vs. HALT), and EPROM security lockout - all set during manufacturing and immutable in the field.
Can the MC705P6ACDWE drive LEDs or relays directly?
Yes, the MC705P6ACDWE can drive LEDs or small relays directly using PC0 and PC1, which support up to 20 mA sink current each. Other I/O pins are rated for 10 mA sink/source and require external drivers for higher loads. Always verify voltage drop and thermal limits under actual operating conditions.
MC705P6ACDWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- HC05
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- HC05
- Core Size:
- 8-Bit
- Speed:
- 2.1MHz
- Connectivity:
- SIO
- Peripherals:
- POR, WDT
- Number of I/O:
- 21
- Program Memory Size:
- 4.5KB (4.5K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 176 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC705P6ACDWE FAQ
1.How can I place an order for MC705P6ACDWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC705P6ACDWE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC705P6ACDWE reliable?
The price and inventory of MC705P6ACDWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC705P6ACDWE is usually 5 days.
3.What payment methods are accepted for MC705P6ACDWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC705P6ACDWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC705P6ACDWE?
MC705P6ACDWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC705P6ACDWE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC705P6ACDWE?
For technical support, including MC705P6ACDWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC705P6ACDWE requirements.
6.How does Aetrix verify that MC705P6ACDWE is sourced from the original manufacturer or authorized distributors?
All MC705P6ACDWE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC705P6ACDWE meets industry standards.
7.What is the process for return or replacement of MC705P6ACDWE?
All MC705P6ACDWE units undergo pre-shipment inspection (PSI). If there is an issue with MC705P6ACDWE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC705P6ACDWE part is unused and in its original packaging.
Return procedure for MC705P6ACDWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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