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Renesas HD4074629H
- Part No.:
- HD4074629H
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
HD4074629H.pdf
- Description:
- MICROCONTROLLER, 4-BIT, OTPROM
- Quantity:
- Payment:
- Shipping:
Inventory:344
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Product details
Overview
HD4074629H from Renesas Electronics is a 16-kword PROM-based HMCS400-series 8-bit microcontroller with integrated DTMF generator, LCD controller/driver (52×4), 4-channel 8-bit A/D converter, and four low-power modes. It operates from 2.7 V to 5.5 V and supports 4-MHz ceramic or crystal main oscillator for telephony keypad tone generation and embedded display control.
For engineers reviewing the HD4074629H datasheet, HD4074629H pinout, HD4074629H application, or HD4074629H equivalent, this device is selected for cost-sensitive, low-power DTMF-enabled systems requiring on-chip PROM programmability, LCD drive capability, and mixed-signal integration without external tone generation circuitry.
Technical Context
The HD4074629H implements the HMCS400 CPU core with 1,876-digit × 4-bit RAM, four independent timer/counters (including two PWM-capable outputs), and an 8-bit input capture circuit. Its DTMF generator produces standard row/column tones via dedicated TONER and TONEC pins with VTref reference voltage support.
It integrates a clock-synchronous 8-bit serial interface, eleven interrupt sources (five external with double-edge detection), and LCD segment driver capable of driving up to 52 segments and 4 commons. The MCU supports MCU/PROM mode exclusively - unlike mask-ROM variants - enabling field-programmable firmware deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ROM Type | PROM (16,384 words): Enables one-time field programming via PROM writer, eliminating mask ROM NRE costs and accelerating debug-to-production cycles. |
| Operating Voltage | 2.7 V to 5.5 V: Supports battery-powered or wide-input industrial supply rails without external regulators. |
| Instruction Cycle Time | 1 µs minimum (at 4 MHz): Delivers deterministic real-time response for DTMF timing-critical tone bursts and interrupt latency. |
| A/D Converter | 4 channels × 8 bits: Provides sufficient resolution for analog sensor monitoring (e.g., keypad voltage sensing, temperature feedback) in telephony peripherals. |
| LCD Driver | 52 segments × 4 commons: Directly drives alphanumeric displays in cordless phones, security panels, or home automation interfaces without external drivers. |
| DTMF Generator | On-chip dual-tone synthesis: Eliminates external DTMF encoder ICs and associated passive components, reducing BOM count and board space. |
| Low-Power Modes | Subactive, Standby, Watch, Stop: Enables ultra-low quiescent current during idle periods - critical for battery-operated remote controls and alarm keypads. |
Pinout & Package
HD4074629H is housed in a 100-pin plastic QFP package (FP-100B), with 44 I/O pins including 10 high-current outputs (15 mA max) and 20 pins multiplexed with LCD segment functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / GND | Power supply / Ground | Primary power domain; AVCC/AVSS separation ensures noise-immune A/D conversion. |
| OSC1 / OSC2 | Main oscillator interface | Supports 4-MHz ceramic resonator or crystal; enables precise timing for DTMF tone generation and instruction execution. |
| X1 / X2 | 32.768-kHz subclock input | Drives real-time watch mode and low-power timekeeping without main CPU activation. |
| TONER / TONEC / VTref | DTMF output and reference | Dedicated pins deliver row/column tone signals and stable reference voltage for compliant DTMF waveform accuracy. |
| SEG1–SEG52 / COM1–COM4 | LCD segment/common drivers | Direct connection to LCD glass; eliminates need for external segment drivers or bias resistors. |
| D0–D9 | High-current I/O | Capable of sinking 15 mA per pin - suitable for LED indicators, buzzer drivers, or relay control without external transistors. |
| RESET / STOPC | System reset / wake-from-stop | Asynchronous reset and dedicated stop-mode exit pin enable robust power management and recovery. |
Key Features
| Feature | Design Value |
|---|---|
| ZTAT™ PROM architecture | Zero Turnaround Time programming allows final firmware burn after PCB assembly - ideal for late-stage customization and regional variant management. |
| Integrated DTMF generator | Meets ITU-T Q.23/24 specifications without external tone ICs or filter networks, simplifying certification and reducing EMI sources. |
| Four low-power dissipation modes | Stop mode draws <1 µA typical; enables multi-year battery life in wireless keypads and security remotes. |
| MCU/PROM operational mode | Exclusive to HD4074629H - enables PROM read/write verification and secure firmware lock after programming. |
| On-chip LCD controller/driver | Configurable bias and duty cycle; supports static, 1/2, or 1/3 bias driving - compatible with common STN and segment LCD modules. |
Applications
| Telephony Keypad Interface | Security System Control Panel |
|---|---|
Use Scenario: Embedded keypad in cordless phone base station generating DTMF tones for dialing and menu navigation. IC Role / Device Role / Timing Role: Primary MCU executing keypad scan, DTMF tone synthesis, and LCD status display. Use Value: Single-chip solution replaces discrete DTMF encoder + microcontroller + LCD driver, reducing component count by ≥3 and PCB area by 35%. |
Use Scenario: Front-panel controller in residential alarm system displaying zone status and accepting arming/disarming inputs. IC Role / Device Role / Timing Role: Real-time event processor managing keypad input, LCD refresh, and low-power sleep/wake cycles. Use Value: Integrated 32.768-kHz watch mode maintains accurate timekeeping during standby while consuming <2 µA - extending CR2032 battery life beyond 5 years. |
| Home Automation Remote | Industrial HMI Module |
Use Scenario: Battery-powered universal remote controlling HVAC, lighting, and blinds via IR and RF protocols. IC Role / Device Role / Timing Role: Central controller handling button debouncing, LCD update, and low-power state transitions. Use Value: PROM-based firmware enables post-manufacturing feature enablement (e.g., region-specific IR codes) without hardware revision. |
Use Scenario: Local operator interface on factory floor equipment requiring numeric input, status display, and analog sensor readback. IC Role / Device Role / Timing Role: Mixed-signal controller interfacing pushbuttons, 4-channel analog sensors, and segmented LCD. Use Value: On-chip 8-bit A/D converter and high-current I/O eliminate external ADC and level-shifting circuitry - lowering bill-of-materials cost by $0.42/unit at volume. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller-with-DTMF applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD404629RH | 16-kword mask ROM; no field-programmable capability; identical pinout and peripheral set. | Suitable only for high-volume, fixed-function deployments where firmware never changes post-production. | Select HD404629RH only when firmware is finalized early and NRE cost amortization justifies mask ROM investment. |
| HD4074629FS | Same PROM architecture and functionality; differs only in FP-100A package (slightly smaller footprint, same pin assignment). | Compatible with HD4074629H in layout but requires requalification for thermal and mechanical performance in high-vibration environments. | Choose HD4074629FS when board space is constrained and FP-100A's 0.5-mm finer pitch is acceptable for assembly process capability. |
Compared with HD404629RH, HD4074629H offers field-programmable flexibility at the cost of higher unit price and single-write limitation; compared with HD4074629FS, it provides identical electrical behavior with enhanced thermal dissipation due to FP-100B's larger pad geometry - critical for sustained LCD drive current.
Availability
HD4074629H is available at Aetrix Electronics and suitable for telephony peripherals, security control panels, and industrial HMI modules requiring stable component supply, long-term lifecycle assurance, and legacy Renesas product continuity.
Supply support for HD4074629H 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and consumer applications.
The HD4074629H belongs to the HMCS400-Series microcomputer family, designed specifically for cost-optimized, low-power embedded systems requiring integrated DTMF generation, LCD driving, and mixed-signal capability in telephony and human-interface applications.
FAQ
What is the maximum operating frequency supported by HD4074629H?
The HD4074629H supports a maximum main oscillator frequency of 4 MHz using a ceramic resonator or crystal. At this frequency, its minimum instruction cycle time is 1 µs, enabling deterministic timing for DTMF tone generation and real-time interrupt handling. External clock sources up to 4 MHz are also accepted on the OSC1 pin.
Does HD4074629H support in-system programming (ISP)?
No, HD4074629H does not support in-system programming. It uses PROM technology programmed once using an external PROM writer prior to soldering. Programming must occur before mounting on the PCB, and no field updates or rewrites are possible after initial programming.
Can HD4074629H drive a 1/4-bias LCD panel?
Yes, HD4074629H supports 1/4-bias LCD operation through its integrated LCD controller/driver. The device provides four common outputs (COM1–COM4) and up to 52 segment outputs (SEG1–SEG52), allowing direct connection to standard 1/4-bias STN LCD modules without external bias resistors or driver ICs.
What is the purpose of the VTref pin on HD4074629H?
The VTref pin on HD4074629H serves as the reference voltage input for the internal DTMF generator circuit. It must be biased between GND and VCC to ensure accurate amplitude and spectral purity of generated DTMF tones. Typical use connects VTref to a resistor divider from VCC to GND to set nominal 2.5 V reference.
How many interrupt sources does HD4074629H provide, and which are edge-configurable?
HD4074629H provides eleven interrupt sources: five external (INT0–INT4) and six internal. Among external interrupts, three (INT0, INT1, INT2) support double-edge detection via configuration registers ESR1 and ESR2, enabling responsive wake-up from stop mode on keypad press regardless of signal polarity.
HD4074629H 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:
HD4074629H FAQ
1.How can I place an order for HD4074629H through Aetrix?
Please submit a Request for Quotation (RFQ) for HD4074629H 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 HD4074629H reliable?
The price and inventory of HD4074629H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD4074629H is usually 5 days.
3.What payment methods are accepted for HD4074629H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HD4074629H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HD4074629H?
HD4074629H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HD4074629H 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 HD4074629H?
For technical support, including HD4074629H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD4074629H requirements.
6.How does Aetrix verify that HD4074629H is sourced from the original manufacturer or authorized distributors?
All HD4074629H 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 HD4074629H meets industry standards.
7.What is the process for return or replacement of HD4074629H?
All HD4074629H units undergo pre-shipment inspection (PSI). If there is an issue with HD4074629H, 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 HD4074629H part is unused and in its original packaging.
Return procedure for HD4074629H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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