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Renesas HD4074344FP
- Part No.:
- HD4074344FP
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
HD4074344FP.pdf
- Description:
- MICROCONTROLLER, 4-BIT, OTPROM
- Quantity:
- Payment:
- Shipping:
Inventory:4,268
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Product details
Overview
HD4074344FP from Renesas Electronics is a 4-bit ZTAT™ PROM-based microcontroller featuring 4,096-word on-chip PROM, 256-digit × 4-bit RAM, 8-bit × 4-channel A/D converter, two timer/counters, and an 8-bit clock-synchronous serial interface. It operates from 2.7 V to 5.5 V with 1 µs instruction cycle time at 4 MHz oscillator frequency and targets compact embedded control applications requiring rapid prototyping and low-volume production.
For engineers reviewing the HD4074344FP datasheet, HD4074344FP pinout, HD4074344FP application, or HD4074344FP equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for industrial sensor nodes, appliance control modules, and battery-powered instrumentation systems.
Technical Context
The HD4074344FP implements a Harvard-architecture 4-bit MCU core with dedicated ROM program memory (PROM), 256-digit RAM organized as 4-bit words, and integrated peripherals including dual timers (free-running and reload), event counter with edge-selectable input, and serial interface supporting master/slave synchronous communication. Its A/D converter supports four single-ended analog inputs with internal reference.
It features ceramic oscillator support (no RC option), two low-power modes (standby and stop), and 22 I/O pins - including 10 high-current sink pins rated up to 15 mA - all in a 28-pin flat-pack plastic (FP-28DA) package. The device uses NMOS I/O structure with no intermediate-voltage open-drain variants, distinguishing it from the HD404394 series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 4-bit Harvard architecture with dedicated PROM program memory and 256-digit × 4-bit RAM |
| ROM Size | 4,096 words of on-chip PROM - enables field-programmable firmware without mask costs |
| A/D Converter | 8-bit resolution × 4 channels (AN0–AN3) - supports direct sensor interfacing without external ADC |
| Timer System | Two independent timers: one free-running, one reload; plus event counter with programmable edge detection |
| Serial Interface | Single 8-bit clock-synchronous interface (SCK/SI/SO) - suitable for daisy-chain or peripheral control |
| Operating Voltage | 2.7 V to 5.5 V - compatible with both 3.3 V and 5 V system rails |
| Instruction Cycle | 1 µs at fOSC = 4 MHz - enables deterministic real-time response in timing-critical loops |
Pinout & Package
HD4074344FP is housed in a 28-pin flat-pack plastic package (FP-28DA), measuring 18.0 mm × 8.9 mm × 2.5 mm, with gull-wing leads and 0.8 mm lead pitch. Pin numbering follows standard FP-28DA layout with pins 1–14 on bottom row (left-to-right), pins 15–28 on top row (right-to-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 16) | Power supply | Primary 2.7–5.5 V supply input - requires local decoupling near pin |
| GND (Pin 11) | Ground reference | Dedicated analog/digital ground return - must be connected to system ground plane |
| RESET (Pin 18) | Active-low reset input | Asynchronous reset signal - held low ≥ 100 ns to initialize CPU and peripherals |
| OSC1/OSC2 (Pins 9,10) | Ceramic oscillator interface | Connects directly to 4 MHz ceramic resonator - no external capacitors required |
| D0–D5 (Pins 23–28) | General-purpose I/O port | Bit-addressable outputs; D1/D2 support 15 mA sink - drive LEDs or small relays directly |
| R00–R03, R10–R13, R20–R23, R30–R33 | Multiplexed I/O ports | 22 total I/O lines; R10–R23 are high-current (15 mA sink); AN0–AN3 shared on R30/R31/R32/R33 |
| INT0/EVNB (Pin 23) | External interrupt/event input | Configurable edge-triggered interrupt source or event counter input - used for pulse counting |
| SCK/SI/SO (Pins 19–21) | Serial interface signals | Full-duplex synchronous communication - SCK is bidirectional clock; SI/SO are data lines |
| TOC (Pin 22) | Timer output | Open-drain output for timer-generated waveforms - requires pull-up for logic-level signaling |
| STOPC (Pin 27) | Stop mode wake-up | Level-sensitive input to exit stop mode - transitions from low to high resume execution |
| TEST/VPP (Pin 17) | Programming/test pin | Must be tied to GND in normal operation; used only during PROM programming via external writer |
Key Features
| Feature | Design Value |
|---|---|
| ZTAT™ PROM programmability | Enables rapid firmware iteration and small-batch production without custom mask ROM turnaround |
| Integrated 4-channel A/D converter | Eliminates need for external ADC in sensor monitoring applications - supports direct thermistor, potentiometer, or voltage sensing |
| Two independent timer/counters | Supports simultaneous PWM generation and event counting - e.g., motor speed + encoder pulses |
| 22 I/O pins with 10 high-current sinks | Drives LEDs, solenoids, or MOSFET gates directly - reduces BOM count in cost-sensitive designs |
| Dual low-power modes (standby/stop) | Extends battery life in portable instruments - stop mode draws < 1 µA typical with wake-on-STOPC |
Applications
| Industrial Sensor Node | Home Appliance Control |
|---|---|
|
Use Scenario: Standalone temperature/humidity monitor with LED display and local alarm. IC Role / Device Role / Timing Role: Primary controller executing sensor polling, A/D conversion, display refresh, and threshold-based alert logic. Use Value: On-chip 4-channel A/D and 10 high-current I/O pins eliminate external components - reduces PCB area by ~35% vs. discrete solution. |
Use Scenario: Microwave oven control panel managing keypad scan, display driver, and safety interlock sequencing. IC Role / Device Role / Timing Role: Real-time state machine orchestrating user input, timer-based cooking cycles, and fault detection. Use Value: 1 µs instruction cycle ensures sub-millisecond response to door-open interrupts - meets IEC 60335 safety timing requirements. |
| Portable Test Instrument | Smart Power Outlet |
|
Use Scenario: Battery-powered multimeter front-end digitizing AC/DC voltage, current, and continuity. IC Role / Device Role / Timing Role: Signal acquisition controller performing synchronized sampling, digital filtering, and LCD update scheduling. Use Value: Integrated A/D with 4-channel input supports differential measurement modes - avoids external multiplexer and op-amp stage. |
Use Scenario: Wi-Fi-enabled outlet monitoring load current and enabling remote on/off via cloud API. IC Role / Device Role / Timing Role: Local power management unit handling zero-cross detection, current sensing, and relay drive timing. Use Value: STOPC wake-up capability allows microamp-level sleep between AC half-cycles - extends standby runtime beyond 1 year on coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD404344RFP | Mask ROM version (4,096-word), same pinout and peripheral set but unprogrammable post-manufacture | Suitable for high-volume, fixed-function deployments where firmware never changes | Select HD404344RFP when production volume exceeds 10k units and firmware is fully validated |
| HD4074394FP | Same ZTAT™ PROM architecture but 3-channel A/D (AN1–AN3), includes Vref pin, lacks AN0 | Optimized for systems using external reference or fewer analog inputs - e.g., motor phase current sensing | Choose HD4074394FP when Vref control or reduced channel count aligns with signal chain architecture |
Compared with HD4074344FP, HD404344RFP offers lower unit cost at scale but eliminates field updates, while HD4074394FP trades one A/D channel for precision reference flexibility - both require identical PCB layout but differ in firmware and analog front-end design.
Availability
HD4074344FP is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control modules, and portable test instruments requiring stable component supply across extended product lifecycles.
Supply support for HD4074344FP 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 solutions for industrial, automotive, and IoT applications.
The HD4074344FP belongs to the HMCS400 family of 4-bit microcomputers designed for compact, cost-sensitive embedded control - emphasizing rapid development, low power, and integration of A/D, timers, and serial interfaces.
FAQ
What is the maximum operating frequency supported by HD4074344FP?
The HD4074344FP supports a maximum oscillator frequency of 4 MHz, yielding a 1 µs instruction cycle time. It is designed for ceramic resonator operation (not crystal) and does not support RC oscillation. External clock drive is permitted, but the device's internal oscillator circuitry is optimized for 4 MHz ceramic elements with specified load capacitance.
Does HD4074344FP include a built-in voltage reference for the A/D converter?
No, HD4074344FP does not include an internal voltage reference. Its 8-bit × 4-channel A/D converter uses VCC as the reference voltage. This differs from the HD404394 series, which provides a dedicated Vref pin. For precision measurements, external reference buffering or ratiometric sensor configurations are recommended with HD4074344FP.
Can HD4074344FP be programmed in-circuit after soldering to the PCB?
No, HD4074344FP requires off-board programming using a dedicated PROM writer prior to assembly. The TEST/VPP pin (Pin 17) is not designed for in-system programming and must be tied to GND during normal operation. Programming occurs before placement, consistent with ZTAT™ PROM architecture.
What are the key differences between HD4074344FP and HD4074394FP?
HD4074344FP features 4-channel A/D (AN0–AN3) referenced to VCC, while HD4074394FP provides 3-channel A/D (AN1–AN3) with a dedicated Vref pin. HD4074394FP also includes intermediate-voltage NMOS open-drain I/O on R10–R12 - absent in HD4074344FP. Both share identical PROM size, RAM, timers, and serial interface.
Is HD4074344FP RoHS compliant and halogen-free?
Yes, HD4074344FP meets EU RoHS Directive requirements and is manufactured as a halogen-free device. Renesas Electronics confirms compliance per JESD204B and JEDEC standards. Full material declarations and certificate of compliance are available upon request through Aetrix Electronics' technical support team.
HD4074344FP 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:
HD4074344FP FAQ
1.How can I place an order for HD4074344FP through Aetrix?
Please submit a Request for Quotation (RFQ) for HD4074344FP 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 HD4074344FP reliable?
The price and inventory of HD4074344FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD4074344FP is usually 5 days.
3.What payment methods are accepted for HD4074344FP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HD4074344FP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HD4074344FP?
HD4074344FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HD4074344FP 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 HD4074344FP?
For technical support, including HD4074344FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD4074344FP requirements.
6.How does Aetrix verify that HD4074344FP is sourced from the original manufacturer or authorized distributors?
All HD4074344FP 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 HD4074344FP meets industry standards.
7.What is the process for return or replacement of HD4074344FP?
All HD4074344FP units undergo pre-shipment inspection (PSI). If there is an issue with HD4074344FP, 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 HD4074344FP part is unused and in its original packaging.
Return procedure for HD4074344FP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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