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Renesas HD4074618FS
- Part No.:
- HD4074618FS
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
HD4074618FS.pdf
- Description:
- MICROCONTROLLER, 4-BIT, OTPROM
- Quantity:
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Inventory:106
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Product details
Overview
HD4074618FS from Renesas Electronics is a 4-bit single-chip microcontroller with 8,192-word × 10-bit PROM, 1184-digit × 4-bit RAM, 30 I/O pins (including 10 high-current outputs), integrated DTMF generator, LCD controller/driver (32 segments × 4 commons), and dual oscillator support (400/800 kHz main + 32.768 kHz watch crystal). It targets embedded telecom and appliance control systems requiring low-power operation and on-chip human-interface peripherals.
For engineers reviewing the HD4074618FS datasheet, HD4074618FS pinout, HD4074618FS application, or HD4074618FS equivalent, this page delivers verified technical context, package mapping to FP-80B/TFP-80, confirmed DTMF/LCD/timer functionality, and two validated alternative parts for ZTAT™-capable 4-bit MCU migration paths.
Technical Context
The HD4074618FS implements the HMCS400 architecture with a 10-bit instruction word width, 14-bit program counter, and 16-level subroutine stack supporting CAL/RTN/RTNI instructions. Its CPU executes instructions at 10 µs (fOSC = 400 kHz) or 5 µs (fOSC = 800 kHz) cycle time, with dedicated ALU, W/X/Y/V registers, and status/carry flags.
It integrates three independent timer/counters (A/B/C), a clock-synchronous 8-bit serial interface (SCK/SI/SO), six interrupt sources (two external INT0/INT1, four internal), and a voltage comparator with two analog inputs (COMP0/COMP1) and reference pin (VCref). The DTMF circuit generates standard row/column tones via TONER/TONEC outputs using VTref as reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ROM Type | PROM (8192-word × 10-bit) enabling one-time programmable ZTAT™ development without mask costs |
| RAM Capacity | 1184-digit × 4-bit including 64-digit stack area, 32-digit LCD data buffer ($050–$06F), and dual-bank data space ($100–$2CF) |
| Instruction Cycle | 10 µs at 400 kHz oscillator or 5 µs at 800 kHz - defines real-time response latency for timer interrupts and I/O servicing |
| DTMF Support | On-chip dual-tone generation with dedicated TONER/TONEC outputs and VTref reference - eliminates external DTMF encoder IC |
| LCD Drive | 32-segment × 4-common controller with V1/V2/V3 bias supply pins - drives multiplexed LCDs up to 128 segments without external bias circuitry |
| Power Modes | Four low-power states: Stop (CPU halted, RAM retained), Standby (oscillators off), Watch (32.768 kHz active), Subactive (DTMF/LCD active only) |
| I/O Capability | 30 total I/O pins: D0–D9 are high-current (15 mA max) outputs; D10–D13 serve as voltage comparator inputs; R0–R3 support serial/timer multiplexing |
Pinout & Package
HD4074618FS is available in three 80-pin packages: FP-80B (plastic flat), FP-80A (plastic flat), and TFP-80 (plastic thin flat). All share identical pin functions and numbering conventions per Renesas Rev. 6.0 documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D9 | Bit-addressable I/O port with high-current drive | 15 mA sink/source capability enables direct LED or relay driver connection without external buffers |
| D10–D13 | Analog input pins / voltage comparator channels | D11/COMP0 and D12/COMP1 accept analog signals; VCref sets threshold for comparator decision logic |
| R00–R03 | 4-bit I/O port multiplexed with serial interface | R00/SCK, R01/SI, R02/SO provide full-duplex synchronous serial communication up to system clock rate |
| R30–R33 | 4-bit I/O port multiplexed with timers/interrupts | R31/TIMO outputs variable-duty square wave; R32/INT0 and R33/INT1 accept asynchronous external triggers |
| COM1–COM4 | LCD common electrode outputs | Drive 4 backplane lines for static or multiplexed LCD displays; timing synchronized to internal LCD controller |
| SEG1–SEG32 | LCD segment electrode outputs | Directly drive up to 128 display segments (32 × 4); data loaded from RAM address $050–$06F |
| TONER/TONEC | DTMF tone output pins | Generate row/column frequency pairs per ITU-T Q.23; VTref sets amplitude reference for tone generation accuracy |
| X1/X2 | 32.768 kHz crystal oscillator terminals | Enable precision real-time clock function; supports watch mode with ultra-low power consumption |
Key Features
| Feature | Design Value |
|---|---|
| ZTAT™ PROM architecture | Enables rapid prototyping and production programming without mask ROM lead times - ideal for short-run or evolving firmware designs |
| Integrated DTMF generator | Eliminates need for external DTMF encoder IC and associated passive components, reducing BOM count and PCB area |
| 32×4 LCD controller | Drives alphanumeric or custom segment displays directly from on-chip RAM; no external segment drivers or bias generators required |
| Four low-power operating modes | Supports battery-powered applications with subactive mode drawing current only for DTMF/LCD functions while CPU sleeps |
| Voltage comparator with software-selectable inputs | Allows monitoring of analog sensors (e.g., thermistors, potentiometers) without ADC conversion overhead or external comparators |
| Three independent timer/counters | Provide flexible timing resources: Timer A (free-run), Timer B (event counter), Timer C (interval timer) - each with dedicated mode/control registers |
Applications
| Telecom Keypad Interface | Appliance Control Panel |
|---|---|
Use Scenario: DTMF tone generation and keypad scanning in cordless phone base stations or intercom systems. IC Role / Device Role / Timing Role: HD4074618FS acts as the primary system controller, generating standardized DTMF tones via TONER/TONEC while scanning matrix keypad inputs through D-port and R-port pins. Use Value: On-chip DTMF eliminates external encoder IC and reduces component count by ≥3; PROM allows field-upgradable tone maps without hardware change. |
Use Scenario: User interface and motor control in microwave ovens or washing machines with segmented LCD display. IC Role / Device Role / Timing Role: HD4074618FS serves as the main appliance MCU, driving 32-segment LCD via COM/SEG pins and managing timer-based cooking cycles and safety interlocks. Use Value: Integrated LCD driver reduces external driver IC cost and layout complexity; high-current D-port pins directly drive relays or triac trigger circuits. |
| Industrial Timer Module | Low-Power Security Keypad |
Use Scenario: Programmable delay timer for HVAC or lighting control with LCD status readout and pushbutton input. IC Role / Device Role / Timing Role: HD4074618FS functions as a self-contained timer module, using Timer B for event counting and Timer C for precise interval timing, with LCD feedback. Use Value: Three independent timers enable simultaneous event logging, countdown, and watchdog functions - all within one chip without external timing ICs. |
Use Scenario: Battery-operated access keypad with LCD prompt and tamper detection in security systems. IC Role / Device Role / Timing Role: HD4074618FS operates in Watch mode using X1/X2 32.768 kHz crystal for real-time clock, wakes on keypad press (INT0/INT1), and drives LCD in low-power subactive mode. Use Value: Four power modes extend battery life >2 years; voltage comparator monitors tamper switch state without waking CPU continuously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD404618FS | Mask ROM (8192-word × 10-bit), no field-programmability | Suitable for high-volume, fixed-function deployments where firmware never changes | Select HD404618FS when production volume justifies mask ROM NRE cost and firmware stability is guaranteed |
| HD4074618H | Identical PROM core but in FP-80A package (different lead pitch and thermal profile) | Requires PCB redesign due to FP-80A mechanical dimensions and soldering profile vs. FP-80B | Choose HD4074618H only if existing board uses FP-80A footprint or thermal constraints favor FP-80A's construction |
Compared with HD404618FS and HD4074618H, the HD4074618FS uniquely combines ZTAT™ PROM flexibility with FP-80B packaging - making it optimal for mid-volume, firmware-evolving applications where rework avoidance and rapid iteration outweigh mask ROM cost savings.
Availability
HD4074618FS is available at Aetrix Electronics and suitable for telecom interface modules, appliance control panels, industrial timer units, and low-power security keypads requiring stable component supply across extended product lifecycles.
Supply support for HD4074618FS 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 formed in 2010 through merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for industrial and consumer systems.
The HD4074618FS belongs to the HD404618 Series - a family of 4-bit HMCS400-based MCUs designed specifically for cost-sensitive, low-power embedded applications requiring integrated DTMF, LCD, and comparator functions in a single chip.
FAQ
What is the memory configuration of the HD4074618FS?
The HD4074618FS contains 8,192-word × 10-bit PROM for program storage and 1184-digit × 4-bit RAM organized into data area ($040–$2CF), LCD display buffer ($050–$06F), interrupt control bits ($000–$003), register flags ($020–$023), special function registers ($004–$01F, $024–$03F), and 64-digit stack area ($3C0–$3FF). This structure supports both general-purpose data handling and dedicated peripheral control without external memory.
Does the HD4074618FS support external crystal oscillators?
Yes, the HD4074618FS supports two oscillator configurations: a main system oscillator (400/800 kHz) via OSC1/OSC2 pins for ceramic resonator or external clock input, and a precision 32.768 kHz watch crystal via X1/X2 pins for real-time clock and low-power watch mode operation - both are fully functional and documented in the Rev. 6.0 datasheet.
How does the HD4074618FS implement DTMF generation?
The HD4074618FS implements DTMF generation using an on-chip digital tone synthesizer that outputs row and column frequencies simultaneously on TONER and TONEC pins, referenced to VTref. It conforms to ITU-T Q.23 specifications and requires no external filtering or amplification - the generated tones meet telephone network requirements when driven into standard line impedance.
What are the power management capabilities of the HD4074618FS?
The HD4074618FS provides four distinct low-power modes: Stop (CPU halted, RAM retained), Standby (all clocks stopped), Watch (32.768 kHz active only), and Subactive (DTMF and LCD controllers active while CPU sleeps). Each mode is entered via specific instruction sequences and offers measurable current reduction - down to µA-range in Watch mode - enabling multi-year battery life in portable applications.
Can the HD4074618FS drive an LCD display directly?
Yes, the HD4074618FS integrates a full 32-segment × 4-common LCD controller/driver with dedicated V1/V2/V3 bias supply pins and COM1–COM4/SEG1–SEG32 outputs. It drives static or multiplexed LCDs directly from on-chip RAM without external drivers, supporting up to 128 segments with software-configurable duty cycle and bias voltage levels.
HD4074618FS 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:
HD4074618FS FAQ
1.How can I place an order for HD4074618FS through Aetrix?
Please submit a Request for Quotation (RFQ) for HD4074618FS 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 HD4074618FS reliable?
The price and inventory of HD4074618FS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD4074618FS is usually 5 days.
3.What payment methods are accepted for HD4074618FS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HD4074618FS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HD4074618FS?
HD4074618FS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HD4074618FS 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 HD4074618FS?
For technical support, including HD4074618FS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD4074618FS requirements.
6.How does Aetrix verify that HD4074618FS is sourced from the original manufacturer or authorized distributors?
All HD4074618FS 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 HD4074618FS meets industry standards.
7.What is the process for return or replacement of HD4074618FS?
All HD4074618FS units undergo pre-shipment inspection (PSI). If there is an issue with HD4074618FS, 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 HD4074618FS part is unused and in its original packaging.
Return procedure for HD4074618FS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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