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Renesas HD4074318HV
- Part No.:
- HD4074318HV
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
HD4074318HV.pdf
- Description:
- MCU, 4-BIT, EPROM
- Quantity:
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- Shipping:
Inventory:142
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Product details
Overview
HD4074318HV from Renesas Electronics is a ZTAT™ PROM-based 4-bit HMCS400-series microcontroller with 8-kword on-chip PROM, integrated 8-bit × 8-channel A/D converter, three timers (event counter, timer output, input capture), and 34 I/O pins - including 21 high-voltage (40 V max) outputs for direct fluorescent display driving. It operates at 1 µs instruction cycle time (fosc = 4 MHz) and supports ceramic/crystal or external clock sources.
For engineers reviewing the HD4074318HV datasheet, HD4074318HV pinout, HD4074318HV application, or HD4074318HV equivalent, key selection considerations include its PROM programmability for rapid prototyping-to-production transition, high-voltage I/O capability for display interface, on-chip A/D conversion for sensor integration, and dual low-power modes (standby/stop) for energy-constrained embedded systems.
Technical Context
The HD4074318HV implements a Harvard architecture with separate 10-bit ROM (8,192 × 10 bits) and 384 × 4-bit RAM, supporting 101 instructions across seven addressing modes including register indirect, direct, zero-page, and table-data. Its interrupt system features seven sources - two external (INT0/INT1), three timer-based, plus A/D and serial - with fixed priority and vectorized handling at $0000–$000E.
It integrates a clock-synchronous serial interface (1 channel, SCK/SI/SO), alarm output (BUZZ), built-in oscillators (ceramic/crystal/external), and dedicated high-voltage I/O port RA1/Vdisp. In PROM programming mode, pins reconfigure to standard 27256-compatible address/data/control lines (A0–A14, O0–O7, CE/OE), enabling in-system programming via industry-standard PROM writers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 4-bit HMCS400-series Harvard architecture with 14-bit PC and 10-bit ROM address space |
| Memory | 8,192-word PROM (8,192 × 10 bits); 384 × 4-bit RAM with stack pointer ($3FF initial) |
| Instruction Cycle | 1 µs at fosc = 4 MHz - enables deterministic real-time control in timing-critical applications |
| A/D Converter | 8-bit resolution, 8-channel analog input (AN0–AN7), with dedicated AVCC/AVSS power and reference pins |
| Timers | Three independent timers: Timer A (input capture), Timer B (event counter), Timer C (timer output) |
| I/O Capability | 34 total I/O pins: 21 high-voltage (40 V max) for direct fluorescent display drive; 13 standard-voltage pins |
| Power Modes | Active, Standby (oscillator running, CPU halted), and Stop (oscillator stopped, RAM retained) - reduces system power during idle |
Pinout & Package
HD4074318HV is available in FP-44A (44-pin flat package) and DP-42S (42-pin DIP) variants. This entry corresponds to the HV suffix, indicating high-voltage I/O capability and PROM configuration - consistent with FP-44A pinout per datasheet Rev. 6.0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RA1/Vdisp | High-voltage output power supply | Provides up to 40 V for fluorescent display anode drive when enabled by mask option |
| D0–D8 | High-voltage I/O port | All nine pins support 40 V operation and individual bit-addressable configuration |
| R30–R43 | Analog input / digital I/O | Eight pins serve as A/D inputs (AN0–AN7); also configurable as standard I/O |
| SCK/SI/SO | Serial interface signals | Full-duplex synchronous serial communication (clock, input, output) with software-controllable mode |
| TOC/BUZZ/STOPC | Timer output / alarm / stop control | TOC provides timer-generated waveform; BUZZ outputs square wave; STOPC wakes MCU from Stop mode |
Key Features
| Feature | Design Value |
|---|---|
| ZTAT™ PROM programmability | Enables one-time field programming using standard 27256-compatible PROM writers - eliminates mask ROM NRE and accelerates debug-to-production cycles |
| Integrated 8-channel A/D converter | Reduces external component count for sensor interfacing; supports simultaneous sampling control and interrupt-driven data acquisition |
| Fluorescent display driver support | 21 high-voltage I/O pins (40 V max) eliminate external driver ICs - lowers BOM cost and board space in instrument panel designs |
| Three dedicated timers | Input capture (Timer A), event counting (Timer B), and precise waveform generation (Timer C) enable multi-function timing without software overhead |
| Two low-power operating modes | Standby (CPU halted, oscillator active) and Stop (oscillator halted, RAM retained) extend battery life in portable instrumentation and remote sensors |
Applications
| Industrial Panel Meters | Appliance Control Panels |
|---|---|
Use Scenario: Digital panel meters measuring voltage, current, or temperature in factory-floor equipment. IC Role / Device Role / Timing Role: HD4074318HV serves as main controller, acquiring analog sensor data via its 8-channel A/D, processing values, and driving segmented fluorescent displays using high-voltage I/O pins. Use Value: Eliminates need for external A/D converters and display drivers - reduces component count and improves signal integrity in noisy industrial environments. | Use Scenario: User interface and motor control logic in microwave ovens and washing machines. IC Role / Device Role / Timing Role: HD4074318HV manages keypad scanning, timer functions, buzzer feedback (BUZZ pin), and fluorescent display updates while monitoring thermal sensors via AN0–AN7. Use Value: Single-chip solution with integrated timers and alarm output simplifies firmware development and meets cost targets for high-volume white goods. |
| Test & Measurement Instruments | Legacy Industrial Controllers |
Use Scenario: Portable multimeters and handheld oscilloscopes requiring compact, low-power embedded control. IC Role / Device Role / Timing Role: HD4074318HV executes measurement algorithms, controls LCD/fluorescent display segments, and enters Stop mode between readings to conserve battery power. Use Value: On-chip Stop mode with RAM retention allows instant wake-up and state recovery - critical for responsive user interaction in portable tools. | Use Scenario: Retrofit controllers replacing obsolete discrete logic or early microcontrollers in factory automation systems. IC Role / Device Role / Timing Role: HD4074318HV replaces TTL-based sequencers with programmable logic, using its input capture timer (TOC) for encoder pulse counting and D-port for relay/actuator control. Use Value: PROM-based firmware allows field updates without hardware changes - extends service life of aging production line equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD404318H | Mask ROM version (8-kword), not field-programmable; identical pinout and peripheral set | Requires upfront mask ROM commitment; unsuitable for iterative development or low-volume customization | Select HD404318H only for high-volume, stable-firmware deployments where NRE cost is justified |
| HD4074318S | DIP package (DP-42S) vs. HD4074318HV's FP-44A; same PROM functionality and electrical specs | Better suited for through-hole prototyping and manual assembly; lacks surface-mount compatibility | Choose HD4074318S for lab validation or legacy PCBs; HD4074318HV preferred for modern SMT production |
Compared with HD404318H and HD4074318S, the HD4074318HV uniquely combines surface-mount packaging (FP-44A), field-programmable PROM, and high-voltage I/O - making it optimal for cost-sensitive, medium-volume industrial displays requiring design flexibility and board-space efficiency.
Availability
HD4074318HV is available at Aetrix Electronics and suitable for industrial panel meters, appliance control panels, test & measurement instruments, and legacy industrial controllers requiring stable component supply and long-term obsolescence management.
Supply support for HD4074318HV 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The HD4074318HV belongs to the HMCS400-series - a family of 4-bit microcontrollers designed specifically for cost-optimized, high-reliability embedded control in instrumentation, home appliances, and industrial human-machine interfaces.
FAQ
What is the programming method for the HD4074318HV PROM?
The HD4074318HV uses ZTAT™ PROM technology compatible with the 27256 EPROM standard. Programming requires a certified PROM writer (e.g., DATA I/O 121B or AVAL PKW-1000) and appropriate socket adapter (e.g., Hitachi HS4318ESH01H for FP-44A). During programming, the device enters PROM mode where pins remap to address/data/control lines - no special voltage sequences beyond VPP are required. The HD4074318HV retains programmed data indefinitely under normal operating conditions.
Does the HD4074318HV support crystal oscillator operation?
Yes, the HD4074318HV supports crystal oscillator operation via OSC1 and OSC2 pins. A parallel-resonant quartz crystal (typically 1–4 MHz) connects directly between these pins, with optional load capacitors (15–30 pF) to ground. The internal oscillator circuit is designed for stability across industrial temperature ranges, and the HD4074318HV achieves 1 µs instruction cycle time at 4 MHz - confirmed in the official Rev. 6.0 datasheet.
How many analog input channels does the HD4074318HV have, and what is their resolution?
The HD4074318HV integrates an 8-bit successive-approximation A/D converter with eight analog input channels (AN0–AN7), mapped to pins R30–R33 and R40–R43. Each channel supports single-ended input with programmable conversion start via software or timer trigger. The HD4074318HV specifies ±1 LSB integral nonlinearity and 50 kHz maximum conversion rate - sufficient for sensor monitoring in industrial control applications.
Can the HD4074318HV drive fluorescent displays directly?
Yes, the HD4074318HV can drive fluorescent displays directly using its 21 high-voltage I/O pins rated to 40 V. Pin RA1/Vdisp supplies the high-voltage anode supply when enabled by mask option, while D0–D8 and R10–R23 provide segment/column drive capability. This eliminates external high-voltage drivers and simplifies PCB layout - a core design advantage explicitly documented for the HD4074318HV in the HD404318 Series datasheet.
What are the low-power modes supported by the HD4074318HV?
The HD4074318HV supports two low-power modes: Standby (CPU halted, oscillator running, RAM retained) and Stop (oscillator halted, RAM retained, all peripherals reset). Entry is controlled via SBY and STOP instructions; wake-up from Standby occurs on any interrupt, while Stop mode requires STOPC pin assertion. These modes reduce current consumption to sub-mA levels - validated in the HD404318 Series electrical characteristics table for industrial temperature range.
HD4074318HV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
HD4074318HV FAQ
1.How can I place an order for HD4074318HV through Aetrix?
Please submit a Request for Quotation (RFQ) for HD4074318HV 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 HD4074318HV reliable?
The price and inventory of HD4074318HV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD4074318HV is usually 5 days.
3.What payment methods are accepted for HD4074318HV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HD4074318HV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HD4074318HV?
HD4074318HV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HD4074318HV 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 HD4074318HV?
For technical support, including HD4074318HV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD4074318HV requirements.
6.How does Aetrix verify that HD4074318HV is sourced from the original manufacturer or authorized distributors?
All HD4074318HV 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 HD4074318HV meets industry standards.
7.What is the process for return or replacement of HD4074318HV?
All HD4074318HV units undergo pre-shipment inspection (PSI). If there is an issue with HD4074318HV, 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 HD4074318HV part is unused and in its original packaging.
Return procedure for HD4074318HV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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