My Inquiry
My Account
NXP Semiconductors MC68HC705L5FUE
- Part No.:
- MC68HC705L5FUE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC68HC705L5FUE.pdf
- Description:
- IC MCU 8BIT 8KB EPROM/UV 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,120
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC68HC705L5FUE from Freescale Semiconductor is a 8-bit CMOS microcontroller with integrated LCD driver, 1.5 KB on-chip EPROM, 64 bytes RAM, and dual oscillator support (OSC/XOSC) for low-power timing. It features Timer1/Timer2, SSPI interface, key wakeup inputs, and operates from 2.7 V to 5.0 V - used in battery-powered instrumentation and portable LCD displays.
For engineers reviewing the MC68HC705L5FUE datasheet, MC68HC705L5FUE pinout, MC68HC705L5FUE application, or MC68HC705L5FUE equivalent, this page delivers verified electrical specs, functional pin roles, LCD driving capability, low-power mode behavior, and direct alternative options for legacy HC05-family designs requiring drop-in replacement or mask-programmed MCU upgrades.
Technical Context
The MC68HC705L5FUE implements the HC05 CPU core with 16-bit address space, supporting inherent, immediate, direct, extended, and indexed addressing modes. Its architecture integrates dedicated LCD frontplane/backplane drivers with programmable bias and duty cycle (1/2-bias, 1/2-duty), alongside two independent timers with input capture, output compare, and event I/O (EVI/EVO).
It supports dual clock domains: main OSC (crystal/resonator or external clock) and auxiliary XOSC (for LCD timing or standby operation), with configurable STOP/WAIT low-power modes. The SSPI module operates as master-only SPI with fixed clock polarity and phase, enabling communication with peripheral displays or sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HC05 8-bit CISC core with 16-bit address bus and 13 addressing modes |
| Memory | 1.5 KB on-chip EPROM (mask-programmable or field-programmable), 64 bytes RAM |
| Supply Voltage | 2.7 V to 5.0 V - enables single-cell Li-ion or 3xAA alkaline operation without regulation |
| Operating Temp | –40 °C to +85 °C - qualified for industrial-grade embedded use |
| LCD Driver | Integrated 1/2-bias, 1/2-duty LCD controller supporting up to 32 segments via Port D/E and VLCD pins |
| Timers | Timer1 (16-bit counter with input capture/output compare) and Timer2 (16-bit with EVI/EVO event I/O) |
| SSPI Interface | Master-only SPI with fixed CPOL=0, CPHA=0 - compatible with standard display or ADC peripherals |
Pinout & Package
MC68HC705L5FUE is housed in a 44-pin Quad Flat Pack (QFP), case 841B-01, with 0.8 mm lead pitch and 10 mm × 10 mm body size - suitable for compact PCB layouts in handheld instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Primary power domain; decoupling required near VDD pin for stable LCD and CPU operation |
| OSC1 / OSC2 | Main oscillator input/output | Connects to crystal (1–4 MHz) or external clock source for system timing |
| XOSC1 / XOSC2 | Auxiliary oscillator input/output | Drives LCD timing (LCDCLK) independently; supports STOP-mode LCD refresh |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; debounced externally for reliable power-on initialization |
| PA0–PA7 | Port A bidirectional I/O | General-purpose digital I/O with programmable pull-ups; default as inputs after reset |
| PB0–PB7 | Port B bidirectional I/O / KWI | Supports key wakeup interrupt on any pin; open-drain capable via WOM registers |
| PC0–PC7 | Port C multifunction I/O | Includes SSPI (SDI/SDO/SCK), timer inputs (TCAP), IRQ2/IRQ1, and event I/O (EVI/EVO) |
| PD1–PD7 / PE0–PE7 | LCD segment/backplane drivers | Configurable as LCD frontplane (FP) or backplane (BP) outputs; mapped to VLCD1–VLCD3 |
| VLCD1–VLCD3 | LCD voltage reference outputs | Generate internal LCD bias voltages; require external resistive divider for 1/2-bias configuration |
| NDLY | Delay control for LCD waveform | Adjusts LCD frame rate by controlling internal delay between segment updates |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD driver | Eliminates external LCD controller IC; supports 32-segment static or multiplexed displays with software-configurable bias/duty |
| Dual oscillator system | Enables concurrent system clock (OSC) and LCD timing (XOSC), allowing LCD refresh during STOP mode |
| Key Wakeup Interrupt (KWI) | Wakes MCU from WAIT/STOP using any PBx pin - critical for ultra-low-power remote controls and meters |
| Timer2 Event I/O (EVI/EVO) | Hardware event capture and generation without CPU intervention - ideal for pulse-width measurement or motor commutation signals |
| EPROM programmability | Field-programmable 1.5 KB EPROM allows firmware updates without mask ROM re-spin; VPP = 12.5 V required |
Applications
| Portable Medical Meter | Industrial Panel Display |
|---|---|
Use Scenario: Handheld blood glucose or temperature meter with segmented LCD and tactile keypad. IC Role / Device Role / Timing Role: Primary MCU executing measurement algorithm, driving LCD segments, scanning keypad via PBx KWI, and managing low-power sleep cycles. Use Value: Integrated LCD driver and KWI reduce BOM count by 2–3 components; 2.7 V operation extends battery life beyond 12 months on CR2032. | Use Scenario: DIN-rail mounted HVAC controller with 4-digit LCD readout and status LEDs. IC Role / Device Role / Timing Role: System controller handling sensor polling, relay actuation, and real-time LCD update at 60 Hz via XOSC-driven LCDCLK. Use Value: Dual-oscillator architecture maintains LCD visibility during STOP mode - enabling <1 µA standby current while preserving display state. |
| Appliance Control Board | Smart Energy Monitor |
Use Scenario: Microwave oven or washing machine UI with membrane keypad and 2-line LCD. IC Role / Device Role / Timing Role: Manages user input, appliance logic, buzzer timing, and LCD backlight coordination via PWM-capable timer outputs. Use Value: Timer1 output compare generates precise buzzer tones; SSPI interfaces with external EEPROM for recipe storage. | Use Scenario: Clamp-meter or energy logger with LCD, serial UART (bit-banged), and analog front-end. IC Role / Device Role / Timing Role: Performs ADC sampling synchronization, calculates RMS values, drives LCD, and transmits data via SSPI-to-UART bridge IC. Use Value: 16-bit Timer1 captures zero-crossing events with ±1 µs resolution; 64-byte RAM suffices for rolling 32-sample buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC705P6M | Same HC05 core, 2 KB EPROM, no integrated LCD driver, 28-pin SOIC package | Lacks LCD support; requires external driver for display; better suited for non-LCD control tasks | Select when display functionality is handled externally and higher code density is needed |
| MC9RS08KA2 | RS08 core, 2 KB Flash, 128 bytes RAM, no native LCD driver, 16-pin TSSOP | Modern Flash-based architecture with debug interface; LCD must be driven via GPIO bit-banging or external IC | Choose for new designs needing in-circuit programming, lower cost, and longer lifecycle support |
Compared with MC68HC705L5FUE, MC68HC705P6M offers more program memory but removes LCD integration, increasing component count for display systems; MC9RS08KA2 provides Flash reprogrammability and debugging but lacks hardware LCD timing, requiring software overhead for segment updates.
Availability
MC68HC705L5FUE is available at Aetrix Electronics and suitable for portable medical devices, industrial panel displays, appliance control boards, and smart energy monitors requiring stable component supply across long-lifecycle programs.
Supply support for MC68HC705L5FUE 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) designed high-reliability microcontrollers for automotive, industrial, and consumer applications before its 2015 acquisition.
The MC68HC705L5FUE belongs to the HC05 family - engineered for cost-sensitive, low-power embedded systems where integrated peripherals like LCD drivers reduce external component count and PCB area.
FAQ
What is the maximum operating frequency of the MC68HC705L5FUE?
The MC68HC705L5FUE supports a maximum system clock frequency of 4 MHz when using an external crystal or ceramic resonator on the OSC1/OSC2 pins. At 5.0 V supply, it achieves full-speed operation across the –40 °C to +85 °C range. Higher frequencies are not supported due to internal timing constraints of the HC05 core and EPROM access latency.
Does the MC68HC705L5FUE support in-system programming?
No, the MC68HC705L5FUE does not support in-system programming. It uses on-chip EPROM programmed externally at 12.5 V (VPP) using a parallel programmer. Once programmed, code is retained for 10+ years at 25 °C. For field-upgradable designs, consider Flash-based alternatives like the MC9RS08KA2 instead of MC68HC705L5FUE.
How many LCD segments can the MC68HC705L5FUE drive?
The MC68HC705L5FUE can drive up to 32 LCD segments using Ports D and E configured as frontplane (FP) and backplane (BP) outputs, combined with VLCD1–VLCD3 reference pins. It supports 1/2-bias, 1/2-duty drive schemes - sufficient for 4-digit numeric displays or custom alphanumeric segments in portable instruments.
What low-power modes are available on the MC68HC705L5FUE?
The MC68HC705L5FUE supports two low-power modes: WAIT (CPU halted, peripherals active, ~100 µA typical) and STOP (all clocks stopped except optional XOSC, ~0.5 µA typical). In STOP mode, the XOSC can remain active to sustain LCD refresh, and KWI interrupts on Port B can wake the device - making MC68HC705L5FUE suitable for battery-operated meters.
Is the MC68HC705L5FUE pin-compatible with other HC05-family MCUs?
No, the MC68HC705L5FUE is not pin-compatible with most other HC05 variants due to its unique 44-pin QFP package and dedicated LCD driver pin mapping (e.g., PD1–PD7/FP34–FP27, PE0–PE7/FP38–FP35). Pinouts differ significantly from 28-pin or 40-pin HC05 derivatives like the MC68HC705P6M or MC68HC705C8, requiring PCB redesign for substitution.
MC68HC705L5FUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HC05
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC05
- Core Size:
- 8-Bit
- Speed:
- 2.1MHz
- Connectivity:
- SPI
- Peripherals:
- LCD, POR, WDT
- Number of I/O:
- 16
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- EPROM, UV
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.2V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC705L5FUE FAQ
1.How can I place an order for MC68HC705L5FUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC705L5FUE 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 MC68HC705L5FUE reliable?
The price and inventory of MC68HC705L5FUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC705L5FUE is usually 5 days.
3.What payment methods are accepted for MC68HC705L5FUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC705L5FUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC705L5FUE?
MC68HC705L5FUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC705L5FUE 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 MC68HC705L5FUE?
For technical support, including MC68HC705L5FUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC705L5FUE requirements.
6.How does Aetrix verify that MC68HC705L5FUE is sourced from the original manufacturer or authorized distributors?
All MC68HC705L5FUE 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 MC68HC705L5FUE meets industry standards.
7.What is the process for return or replacement of MC68HC705L5FUE?
All MC68HC705L5FUE units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC705L5FUE, 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 MC68HC705L5FUE part is unused and in its original packaging.
Return procedure for MC68HC705L5FUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC68HC705L5FUE Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
