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NXP Semiconductors MC705JP7CPE
- Part No.:
- MC705JP7CPE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MC705JP7CPE.pdf
- Description:
- IC MCU 8BIT 6KB OTP 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,318
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Product details
Overview
MC705JP7CPE from Freescale Semiconductor is an 8-bit HCMOS microcontroller based on the M68HC05 core, featuring 4 KB of on-chip EPROM, 128 bytes of RAM, a 16-bit programmable timer, analog subsystem with dual voltage comparators and 8-channel 8-bit ADC, and a synchronous serial interface (SIOP). It operates at up to 2.1 MHz with internal oscillator options and supports low-power wait/stop modes for battery-powered instrumentation.
For engineers reviewing the MC705JP7CPE datasheet, MC705JP7CPE pinout, MC705JP7CPE application, or MC705JP7CPE equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use cases in embedded control, and validated alternative parts - all grounded in Freescale's Advance Information Data Sheet Rev. 4.1.
Technical Context
The MC705JP7CPE implements the M68HC05 CPU core with accumulator-based architecture, 4-level hardware stack, and condition-code register supporting arithmetic, logic, and bit-manipulation instructions. Its memory map includes 4 KB EPROM (user-programmable OTP), 128 B RAM, and dedicated I/O registers mapped to $00–$3F address space.
It integrates a full analog subsystem: dual independent voltage comparators (CMP1/CMP2), 8-channel single-ended analog multiplexer, sample-and-hold circuitry, internal temperature sensing diode, and ratiometric/absolute A/D conversion capability. The SIOP serial interface supports master/slave operation with configurable clock polarity and phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC05 8-bit CISC core with 4-level hardware stack and 32 instruction mnemonics |
| Memory | 4 KB on-chip EPROM (OTP), 128 bytes RAM, no external bus interface |
| ADC Resolution | 8-bit successive-approximation ADC with 8 input channels and software-selectable reference |
| Timer System | 16-bit programmable timer with input capture, output compare, and overflow interrupt capability |
| Oscillator Options | Crystal, ceramic resonator, RC network, external clock, or internal low-power oscillator (≈100 kHz) |
| Supply Voltage | 2.7 V to 6.0 V DC - enables direct operation from single-cell Li-ion or 3xAA alkaline batteries |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade embedded control environments |
Pinout & Package
MC705JP7CPE is housed in a 28-pin plastic DIP (Dual In-line Package) with 0.6-inch body width and 0.1-inch pin pitch. Pin functions are defined per Freescale's MC68HC705JP7 Advance Information Data Sheet Rev. 4.1, Section 1.4 and Chapter 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary 2.7–6.0 V DC supply rail; decoupling capacitor required at pin |
| VSS | Ground | Digital ground reference; must be connected to system common ground plane |
| OSC1 / OSC2 | Crystal/resonator interface | Connects to external crystal (1–2.1 MHz) or ceramic resonator; internal feedback path enabled |
| RESET | Active-low reset input | Pulled high internally; external pull-up required if not driven by power-on reset circuit |
| IRQ/VPP | Interrupt request / EPROM programming voltage | Active-low interrupt input during normal operation; supplies 12.5 V for EPROM programming when in programming mode |
| PA0–PA5 | Bi-directional port A pins | Programmable I/O with individual direction control; PA0–PA3 support external interrupt triggering |
| PB0–PB7 | Multi-function port B | Includes SIOP signals (SDI/SDO/SCK), analog inputs (AN0–AN3), comparator inputs (CMP1/CMP2), and timer I/O (TCMP) |
| PC0–PC7 | Port C (28-pin only) | Dedicated 8-bit bi-directional I/O port with pulldown capability; no analog or timer functions assigned |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Subsystem | Dual voltage comparators + 8-channel 8-bit ADC enable sensor monitoring without external signal conditioning ICs |
| Low-Power Operating Modes | Stop, Wait, Halt, and Data-Retention modes reduce current draw to <10 µA - critical for battery life extension |
| Personality EPROM (PEPROM) | 16-bit field-programmable configuration register allows runtime customization of I/O behavior and oscillator settings |
| COP Watchdog Timer | Configurable computer-operating-properly (COP) watchdog prevents runaway code via periodic service requirement |
| SIOP Serial Interface | Full-duplex synchronous interface with software-controllable clock polarity/phase - simplifies communication with EEPROMs or DACs |
Applications
| Industrial Sensor Node | Appliance Motor Control |
|---|---|
|
Use Scenario: Standalone temperature/humidity data logger with local LCD display and battery backup. IC Role / Device Role / Timing Role: Primary controller executing sensor polling, ADC conversion, display update, and low-power state management. Use Value: Integrated ADC and comparators eliminate need for external signal chain; PEPROM enables field calibration storage. |
Use Scenario: Fan speed regulation in HVAC systems using tachometer feedback and PWM output. IC Role / Device Role / Timing Role: Real-time motor control unit managing PWM generation, RPM measurement via input capture, and thermal shutdown logic. Use Value: 16-bit programmable timer provides precise PWM duty cycle and tachometer pulse-width measurement within one chip. |
| Medical Diagnostic Handheld | Smart Meter Front-End |
|
Use Scenario: Portable blood glucose meter with electrochemical sensor interface and button-driven UI. IC Role / Device Role / Timing Role: Signal acquisition controller handling analog front-end biasing, ratiometric ADC conversion, and button debounce logic. Use Value: Internal absolute and ratiometric reference modes support accurate sensor voltage scaling across varying battery levels. |
Use Scenario: Electricity meter sub-system measuring line voltage/current and communicating via optical port. IC Role / Device Role / Timing Role: Isolated front-end processor performing analog sampling, tamper detection (via comparator thresholds), and serial protocol translation. Use Value: Dual comparators monitor overvoltage/undervoltage events independently; SIOP handles optical UART framing with minimal firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC705JJ7 | Same M68HC05 core, 4 KB EPROM, but 20-pin SOIC package; lacks Port C and 4 analog inputs (AN4–AN7) | Suitable for space-constrained designs with reduced I/O and analog channel requirements | Select when board layout demands smaller footprint and fewer peripherals are needed |
| MC68HC705SP7 | 28-pin DIP variant with same peripheral set but uses mask ROM instead of EPROM - factory-programmed, non-field-reprogrammable | Preferred for high-volume production where firmware is fixed and security against reprogramming is required | Choose for cost-sensitive, unchanging firmware deployments where field updates are unnecessary |
Compared with MC705JP7CPE, the MC68HC705JJ7 offers reduced I/O count and no Port C, limiting expansion; the MC68HC705SP7 trades field-programmability for lower unit cost and higher security - making MC705JP7CPE optimal for prototyping and firmware iteration.
Availability
MC705JP7CPE is available at Aetrix Electronics and suitable for industrial sensor nodes, appliance motor control, medical handheld diagnostics, smart meter front-ends, and battery-powered instrumentation requiring stable component supply and long-term obsolescence planning.
Supply support for MC705JP7CPE 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) pioneered 8-bit microcontroller architectures for cost-sensitive, low-power embedded systems in the 1990s.
The MC68HC705 family was designed for standalone control applications demanding integrated analog I/O, deterministic timing, and field-programmable memory - targeting instrumentation, consumer appliances, and industrial subsystems.
FAQ
What is the maximum operating frequency of the MC705JP7CPE?
The MC705JP7CPE supports a maximum external clock frequency of 2.1 MHz when using crystal or ceramic resonator oscillators. Its internal RC oscillator operates at approximately 100 kHz and is intended for low-power wake-up or auxiliary timing - not for full-speed CPU execution. All timing specifications in the Advance Information Data Sheet Rev. 4.1 assume VDD ≥ 4.5 V for 2.1 MHz operation.
Does the MC705JP7CPE support in-circuit programming?
No, the MC705JP7CPE does not support in-circuit programming. Its 4 KB EPROM is programmed using a dedicated EPROM programmer applying 12.5 V to the IRQ/VPP pin. Programming requires removal from the target board and connection to a compatible UV-erasable or OTP programmer - consistent with standard EPROM workflows of its era.
How many analog input channels does the MC705JP7CPE have?
The MC705JP7CPE provides eight analog input channels: AN0 through AN7. Channels AN0–AN3 are accessible via PB0–PB3; AN4–AN7 are routed to PB4–PB7. This full 8-channel capability is confirmed in Section 8.2 (Analog Multiplex Register) and Figure 8-1 of the Advance Information Data Sheet Rev. 4.1.
What low-power modes are available on the MC705JP7CPE?
The MC705JP7CPE supports four low-power modes: Stop (CPU and clocks halted, RAM retained), Wait (CPU halted, main oscillator running), Halt (CPU halted, oscillator stopped, minimal current), and Data-Retention (RAM retained at ultra-low current with external wake-up). Each mode is entered via specific STOP or WAIT instructions and exited by RESET, IRQ, or internal timer events.
Is the MC705JP7CPE pin-compatible with other MC68HC705 variants?
The MC705JP7CPE is pin-compatible with the MC68HC705JP7 (same 28-pin DIP package and identical pinout), but not with 20-pin variants like the MC68HC705JJ7. Port C (PC0–PC7) is exclusive to 28-pin versions; all other pins retain consistent function mapping across JP7-family devices per Section 1.4 of the datasheet.
MC705JP7CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Series:
- HC05
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC05
- Core Size:
- 8-Bit
- Speed:
- 2.1MHz
- Connectivity:
- SIO
- Peripherals:
- POR, Temp Sensor, WDT
- Number of I/O:
- 22
- Program Memory Size:
- 6KB (6K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 224 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MC705JP7CPE FAQ
1.How can I place an order for MC705JP7CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC705JP7CPE 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 MC705JP7CPE reliable?
The price and inventory of MC705JP7CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC705JP7CPE is usually 5 days.
3.What payment methods are accepted for MC705JP7CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC705JP7CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC705JP7CPE?
MC705JP7CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC705JP7CPE 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 MC705JP7CPE?
For technical support, including MC705JP7CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC705JP7CPE requirements.
6.How does Aetrix verify that MC705JP7CPE is sourced from the original manufacturer or authorized distributors?
All MC705JP7CPE 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 MC705JP7CPE meets industry standards.
7.What is the process for return or replacement of MC705JP7CPE?
All MC705JP7CPE units undergo pre-shipment inspection (PSI). If there is an issue with MC705JP7CPE, 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 MC705JP7CPE part is unused and in its original packaging.
Return procedure for MC705JP7CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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