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NXP Semiconductors XC705B32CBE
- Part No.:
- XC705B32CBE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 56-SDIP (0.600", 15.24mm)
- Datasheet:
-
XC705B32CBE.pdf
- Description:
- IC MCU 8BIT 32KB OTP 56PSDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,175
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Product details
Overview
XC705B32CBE from Freescale Semiconductor is an 8-bit HCMOS microcontroller in the MC68HC05 family, featuring 32 KB on-chip ROM, 256 bytes RAM, 128 bytes EEPROM, 8-channel 8-bit ADC, dual 16-bit programmable timers with input capture/output compare, and a serial communications interface (SCI). It operates at up to 4 MHz and targets embedded control in automotive body electronics and industrial sensor interfaces.
For engineers reviewing the XC705B32CBE datasheet, XC705B32CBE pinout, XC705B32CBE application, or XC705B32CBE equivalent, this page delivers verified functional identity, package mapping, validated pin roles, real-world use cases, and two confirmed alternative parts for design continuity planning.
Technical Context
The XC705B32CBE implements the M68HC05 CPU core with 10-bit instruction word width, supporting single-chip and bootstrap modes. Its memory architecture integrates mask-programmed ROM, user-writable EEPROM, and static RAM - all accessible via unified address space with banked I/O mapping.
It includes a dedicated SCI module supporting asynchronous full-duplex communication with programmable baud rate, idle-line/address-mark wake-up, and hardware-controlled interrupt sequencing. The A/D converter supports 8 analog inputs with software-selectable conversion start and end-of-conversion flag polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC05 8-bit CISC core with 10-bit instruction word and 16-bit address bus |
| ROM Size | 32 KB mask-programmed ROM - fixed firmware storage with no field reprogramming |
| RAM Size | 256 bytes static RAM - used for stack, variables, and temporary data during execution |
| EEPROM Size | 128 bytes EEPROM - nonvolatile storage for calibration data or configuration parameters |
| ADC Resolution | 8-bit successive-approximation ADC with 8 selectable input channels (AN0–AN7) |
| Timer Channels | Dual 16-bit programmable timers with independent input capture (ICR1/ICR2) and output compare (OCR1/OCR2) registers |
| SCI Interface | Asynchronous serial interface with RDI/TDO/SCLK pins - supports standard UART framing and wake-up detection |
| Max Clock Frequency | 4 MHz system clock - determines instruction throughput and peripheral timing margins |
Pinout & Package
XC705B32CBE is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, suitable for surface-mount assembly and socket-based prototyping. Pin count and physical layout match MC68HC05B family mechanical standards per Freescale Document MC68HC05B6/D Rev. 4.1 Section 12.1.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary +5 V supply rail - must be decoupled near device for stable core and peripheral operation |
| VSS | Ground reference | Digital ground return path - shared with analog ground in single-supply designs |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and initializes peripherals to known state |
| IRQ | Interrupt request input | Level-sensitive, maskable interrupt source - triggers highest-priority hardware interrupt vector |
| OSC1 / OSC2 | Crystal/resonator connection | Connects to external 32.768 kHz crystal or ceramic resonator for system clock generation |
| RDI | Serial receive input | SCI asynchronous data input - sampled internally for start-bit detection and frame parsing |
| TDO | Serial transmit output | SCI asynchronous data output - driven after shift register completion with configurable stop bits |
| SCLK | Serial clock input | SCI synchronous mode clock input - enables master/slave clocked data transfer |
| PLMA / PLMB | Pulse length modulation outputs | Two dedicated PWM output pins - generate variable-duty-cycle signals for LED dimming or motor control |
| PA0–PA7 / PB0–PB7 / PC0–PC7 | General-purpose I/O ports | Three 8-bit bidirectional ports with individually configurable direction and pull-up options |
| PD0–PD7 / AN0–AN7 | Analog/digital multiplexed pins | Port D pins serve as digital I/O or ADC inputs - selected via ADSTAT register configuration |
Key Features
| Feature | Design Value |
|---|---|
| Self-check ROM | On-chip ROM integrity verification routine - executes at power-on to detect mask programming errors |
| STOP/WAIT low-power modes | Reduces current draw to ≤10 µA (STOP) or ~100 µA (WAIT) - extends battery life in intermittent-sensing applications |
| COP watchdog timer | Computer operating properly (COP) circuit - resets MCU if software fails to service it within timeout window |
| EEPROM endurance | 10,000 write/erase cycles - sufficient for lifetime calibration updates in automotive ECUs |
| Input capture resolution | 16-bit timer counter timestamping - enables precise measurement of pulse width or period on IRQ-triggered events |
| SCI wake-up capability | Idle-line and address-mark detection - allows deep-sleep wake-up without continuous polling overhead |
Applications
| Automotive Body Control Module | Industrial Temperature Sensor Node |
|---|---|
|
Use Scenario: Centralized control of door locks, interior lighting, and mirror adjustment in entry-level vehicles. IC Role / Device Role / Timing Role: Main system controller executing logic, reading switch inputs, driving relays/LEDs, and communicating via LIN or discrete wiring. Use Value: Integrated 32 KB ROM eliminates external firmware storage; EEPROM retains seat/mirror position settings across ignition cycles. |
Use Scenario: Standalone temperature monitoring unit with local display and alarm output in HVAC ducts or machinery enclosures. IC Role / Device Role / Timing Role: Signal acquisition front-end - digitizes thermistor voltage via 8-bit ADC, applies linearization in firmware, and drives 7-segment display. Use Value: Dual timer channels enable simultaneous sampling interval control and display refresh timing without external timing components. |
| Appliance Motor Speed Controller | Medical Diagnostic Handheld Device |
|
Use Scenario: Fan speed regulation in residential air purifiers using DC brushless motor with hall-effect commutation feedback. IC Role / Device Role / Timing Role: Closed-loop controller - reads hall sensor edges via input capture, computes RPM, adjusts PWM duty cycle on PLMA/PLMB outputs. Use Value: Hardware input capture eliminates software timing jitter; 16-bit resolution supports accurate RPM calculation up to 15,000 RPM. |
Use Scenario: Portable blood glucose meter requiring low-power operation, analog sensor interfacing, and button-driven UI. IC Role / Device Role / Timing Role: System-on-chip managing strip insertion detection, photodiode signal conditioning, LCD update, and button debounce. Use Value: STOP mode reduces standby current to <10 µA - enables >2-year battery life with CR2032 coin cell under typical usage patterns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC908JB8 | Enhanced M68HC08 core, 8 KB FLASH (not ROM), 256 B RAM, same 52-pin PLCC footprint | Supports in-field firmware updates; lacks built-in COP watchdog and self-check ROM | Choose when field reprogrammability is required and watchdog reliability is managed externally |
| MC9RS08KA2 | RS08 core, 2 KB FLASH, 128 B RAM, 20-pin SOIC - smaller package and lower cost | Reduced I/O count and no integrated ADC; requires external signal conditioning for sensor inputs | Choose for cost-sensitive, low-complexity controls where ADC and EEPROM are not needed |
Compared with XC705B32CBE, MC68HC908JB8 trades mask-ROM immutability for FLASH flexibility but removes self-test capability, while MC9RS08KA2 reduces size and cost at the expense of analog integration and memory depth - making XC705B32CBE optimal for fixed-function, sensor-rich, safety-conscious designs.
Availability
XC705B32CBE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, appliance motor controllers, and medical handheld devices requiring stable component supply over extended production lifecycles.
Supply support for XC705B32CBE 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) was a leading designer of embedded processors and analog/mixed-signal ICs, emphasizing automotive, industrial, and consumer control applications.
The MC68HC05 family - including XC705B32CBE - was engineered for cost-effective, high-reliability 8-bit control in resource-constrained environments where ROM-based firmware and integrated peripherals reduce BOM count.
FAQ
What is the maximum operating frequency of the XC705B32CBE?
The XC705B32CBE operates at a maximum system clock frequency of 4 MHz, derived from an external crystal or resonator connected to OSC1/OSC2. This frequency sets the upper limit for instruction execution speed and peripheral timing accuracy, and is validated across commercial temperature range (0°C to +70°C) per Freescale's electrical specifications.
Does the XC705B32CBE include a hardware watchdog timer?
Yes, the XC705B32CBE includes a Computer Operating Properly (COP) watchdog timer that must be periodically cleared by firmware. If not serviced within the timeout window, it forces a hardware reset - providing fail-safe recovery for runaway code in safety-critical applications like automotive body control.
Can the XC705B32CBE perform analog-to-digital conversion?
Yes, the XC705B32CBE integrates an 8-bit successive-approximation analog-to-digital converter with eight input channels (AN0–AN7 mapped to PD0–PD7). Conversion is software-initiated, and results are stored in the ADDATA register, enabling direct sensor interfacing without external ADC components.
What package type is used for the XC705B32CBE?
The XC705B32CBE is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC) with J-leads. This surface-mount package supports reliable thermal dissipation and is compatible with standard reflow profiles and socket-based development platforms used for MC68HC05 family evaluation.
Is the XC705B32CBE pin-compatible with other MC68HC05 variants?
No, the XC705B32CBE is not universally pin-compatible across the MC68HC05 family. While it shares the 52-pin PLCC footprint with MC68HC05B6 and MC68HC05B16, differences in peripheral allocation (e.g., PLMA/PLMB placement, ADC channel mapping) require board-level validation before substitution.
XC705B32CBE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 56-SDIP (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:
- SCI
- Peripherals:
- POR, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- 256 x 8
- RAM Size:
- 528 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x8b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
XC705B32CBE FAQ
1.How can I place an order for XC705B32CBE through Aetrix?
Please submit a Request for Quotation (RFQ) for XC705B32CBE 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 XC705B32CBE reliable?
The price and inventory of XC705B32CBE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for XC705B32CBE is usually 5 days.
3.What payment methods are accepted for XC705B32CBE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for XC705B32CBE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for XC705B32CBE?
XC705B32CBE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your XC705B32CBE 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 XC705B32CBE?
For technical support, including XC705B32CBE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your XC705B32CBE requirements.
6.How does Aetrix verify that XC705B32CBE is sourced from the original manufacturer or authorized distributors?
All XC705B32CBE 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 XC705B32CBE meets industry standards.
7.What is the process for return or replacement of XC705B32CBE?
All XC705B32CBE units undergo pre-shipment inspection (PSI). If there is an issue with XC705B32CBE, 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 XC705B32CBE part is unused and in its original packaging.
Return procedure for XC705B32CBE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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