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Renesas HD407A4669H
- Part No.:
- HD407A4669H
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
HD407A4669H.pdf
- Description:
- 4-BIT, OTPROM, 8MHZ
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
HD407A4669H from Renesas Electronics is a 4-bit ZTAT™ microcontroller with 16,384-word on-chip PROM, 1,152-digit RAM, integrated DTMF generation circuit, two comparators, and 47 I/O pins-including high-current sourcing (10 mA) and sinking (15 mA) capability-designed for multifunction telephones and cordless telephone systems operating from 2.2 V to 5.5 V.
For engineers reviewing the HD407A4669H datasheet, HD407A4669H pinout, HD407A4669H application, or HD407A4669H equivalent, this device delivers real-time clock support via 32.768 kHz sub-oscillator, three timer/counters (two with PWM), one 8-bit serial interface, and low-power stop/standby/subactive modes for battery-powered telecom peripherals.
Technical Context
The HD407A4669H implements the HMCS400 CPU core with zero-page subroutine addressing and vector-based interrupt handling across five external (three edge-programmable) and four internal sources. Its memory map allocates $0000–$3FFF for program space and includes dedicated RAM-mapped registers for DTMF control, timer configuration, serial interface, and comparator enable.
It integrates dual-clock architecture: main system oscillator supports ceramic/crystal/external clock up to 8 MHz (0.5 µs min instruction time at 1/4 division), while independent 32.768 kHz crystal oscillator enables accurate timekeeping. The DTMF generation circuit drives TONER/TONEC outputs with VTref-referenced analog signaling, requiring external passive filter networks per ITU-T Q.23.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HMCS400 4-bit CPU with 16-level subroutine stack and vectorized interrupt handling |
| On-Chip Memory | 16,384-word PROM (ZTAT™, 27256-compatible programming), 1,152-digit × 4-bit RAM |
| Operating Voltage | 2.2 V to 5.5 V - enables direct interface with 3.3 V or 5 V telecom logic without level-shifting |
| DTMF Generation | Dedicated hardware circuit generating standard 16-tone matrix via TONER/TONEC outputs with VTref reference |
| Timer Resources | Three 8-bit timers (A, C, D); TOC/TOD outputs support PWM; EVND provides edge-programmable event input |
| I/O Capability | 47 total I/O pins: 4 high-current source (10 mA), 5 high-current sink (15 mA), all individually addressable |
| Low-Power Modes | Four modes: Stop (full clock halt), Standby (sub-oscillator active), Subactive (reduced main clock), Watch (RTC-only) |
Pinout & Package
HD407A4669H is housed in a 64-pin plastic QFP (FP-64A) package measuring 14 mm × 14 mm × 1.7 mm, with 0.8 mm lead pitch and standard JEDEC MO-137AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 59) | Power supply input | Primary 2.2–5.5 V supply rail; decoupling required near pin for DTMF and timer stability |
| GND (Pin 8) | Ground reference | Common return for digital, analog (VTref, COMP0/1), and DTMF output circuits |
| TONER (Pin 61), TONEC (Pin 60) | DTMF row/column outputs | Open-drain CMOS outputs driving external RC filter network to generate dual-tone signals |
| VTref (Pin 62) | DTMF reference voltage | Analog reference point set between GND and VCC; defines DTMF amplitude scaling and tone accuracy |
| COMP0/COMP1 (Pins 63/64) | Analog comparator inputs | Accept differential or single-ended signals up to VCC; used for line monitoring or signal detection in telecom apps |
| RESET (Pin 5) | Active-low reset input | Asynchronous reset asserting on falling edge; holds CPU and peripherals in known state until release |
| OSC1/OSC2 (Pins 3/4) | Main oscillator interface | Supports ceramic resonator (400 kHz–8 MHz), crystal (400 kHz–8 MHz), or external clock injection |
| X1/X2 (Pins 6/7) | 32.768 kHz sub-oscillator | Dedicated low-frequency crystal connection for RTC functionality; X2 must float if unused |
Key Features
| Feature | Design Value |
|---|---|
| ZTAT™ PROM programming | Eliminates mask ROM turnaround delay; supports 27256-equivalent UV/EEPROM-style development flow |
| DTMF generation hardware | Offloads tone generation from firmware; ensures precise frequency compliance with ITU-T Q.23 standard |
| High-current I/O drivers | Directly interfaces with LED indicators, relays, or piezo elements without external drivers in telephone UI |
| Sub-oscillator RTC support | Enables calendar/timekeeping during low-power standby mode using 32.768 kHz crystal |
| Edge-programmable interrupts | Configurable INT0–INT4 trigger polarity allows flexible signal edge detection for hook-switch or DTMF decode |
Applications
| Telephone Keypad Interface | Line Status Monitoring |
|---|---|
Use Scenario: Detecting keypress events and generating corresponding DTMF tones in cordless telephone handsets. IC Role / Device Role / Timing Role: HD407A4669H acts as the primary controller, scanning keypad matrix, executing DTMF generation, and managing power states during idle. Use Value: Integrated DTMF circuit reduces BOM count by eliminating external tone generator IC; high-current I/O drives keypad LEDs directly. | Use Scenario: Monitoring telephone line voltage and detecting off-hook/on-hook transitions in base station units. IC Role / Device Role / Timing Role: HD407A4669H uses COMP0/COMP1 inputs to sense line DC bias shifts and triggers interrupts for state change response. Use Value: On-chip comparators eliminate need for external op-amp conditioning circuitry; low-power modes extend standby battery life. |
| Caller ID Decoder Peripheral | Multi-Function Telephone Control |
Use Scenario: Parsing FSK-encoded caller ID data received on telephone line during ring cycle. IC Role / Device Role / Timing Role: HD407A4669H configures its 8-bit synchronous serial interface (SCK1/SI1/SO1) to sample and decode FSK bursts at 1200 bps. Use Value: Serial interface operates independently of DTMF engine, enabling concurrent call signaling and display update without CPU overhead. | Use Scenario: Managing LCD display, ringer driver, speaker amplifier, and flash memory in feature-rich desk phones. IC Role / Device Role / Timing Role: HD407A4669H serves as central system controller coordinating peripheral timing, power sequencing, and user input processing. Use Value: 47 I/O pins with mixed current drive simplify PCB layout; four low-power modes optimize energy use across operational states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD404669H | Mask ROM version (16,384-word), no ZTAT™; requires photomask for production; same pinout and peripheral set | Suitable for high-volume, fixed-function deployments where design freeze is complete and reprogramming is unnecessary | Select HD404669H when production volumes justify mask cost and firmware is fully validated |
| HD40A4669H | High-speed mask ROM variant: identical ROM/RAM but supports 8 MHz main clock (0.5 µs instruction time); same package | Better suited for applications demanding faster DTMF burst generation or tighter real-time response in serial communication | Choose HD40A4669H when system timing margins require higher CPU throughput without changing firmware architecture |
Compared with HD404669H and HD40A4669H, the HD407A4669H uniquely enables rapid prototyping and small-batch production via field-programmable PROM, while retaining full electrical and functional compatibility - making it optimal for telecom OEMs iterating on feature sets before committing to mask ROM.
Availability
HD407A4669H is available at Aetrix Electronics and suitable for telephone handset design, cordless base station development, and caller ID peripheral manufacturing requiring stable component supply and long-term lifecycle support.
Supply support for HD407A4669H 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 automotive, industrial, and communications markets.
The HD407A4669H belongs to the HD404669 Series of low-voltage AS microcomputers engineered specifically for voice-grade telecommunications equipment - emphasizing DTMF generation, real-time clock integration, and ultra-low-power operation in battery-constrained devices.
FAQ
What is the programming method for the on-chip PROM in HD407A4669H?
The HD407A4669H uses ZTAT™ (Zero Turn-Around Time) PROM technology compatible with 27256 EPROM programming specifications. It supports standard UV-erasable or electrically programmable PROM writers with VPP = +21 V, and retains code without external power. Programming occurs post-manufacture, enabling firmware updates before final assembly and eliminating mask ROM delays in HD407A4669H development cycles.
Does HD407A4669H support both crystal and ceramic resonators for the main oscillator?
Yes, HD407A4669H supports ceramic resonators, quartz crystals, or external clock signals on OSC1/OSC2 pins across frequencies from 400 kHz to 8 MHz. The high-speed versions (including HD407A4669H) are characterized for stable operation at 7.16 MHz and 8 MHz, enabling minimum 0.5 µs instruction execution time when configured for 1/4 clock division.
How does the DTMF generation circuit in HD407A4669H interface with external components?
The HD407A4669H DTMF circuit outputs row (TONER) and column (TONEC) signals as open-drain CMOS waveforms referenced to VTref. External passive RC filters (per ITU-T Q.23) convert these into standard dual-tone signals. VTref must be biased between GND and VCC; typical implementation uses a resistor divider from VCC to GND, ensuring tone amplitude accuracy and inter-tone isolation in HD407A4669H-based designs.
What are the key differences between HD407A4669H and HD404669H?
The HD407A4669H replaces mask ROM with ZTAT™ PROM, enabling field programming and eliminating photomask costs and lead times. Electrically and functionally identical - same 64-pin QFP package, identical I/O structure, DTMF block, timers, and low-power modes - the HD407A4669H maintains full pin and code compatibility with HD404669H while supporting agile firmware iteration.
Can HD407A4669H operate from a 3.3 V supply in battery-powered telephone applications?
Yes, HD407A4669H operates across 2.2 V to 5.5 V, making it fully compatible with 3.3 V Li-ion or alkaline battery systems. At 3.3 V, it sustains full functionality including DTMF generation, comparator operation, and 8-bit serial interface - with verified timing margins per datasheet Rev. 3.0. Its four low-power modes further extend runtime in portable HD407A4669H implementations.
HD407A4669H 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:
HD407A4669H FAQ
1.How can I place an order for HD407A4669H through Aetrix?
Please submit a Request for Quotation (RFQ) for HD407A4669H 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 HD407A4669H reliable?
The price and inventory of HD407A4669H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD407A4669H is usually 5 days.
3.What payment methods are accepted for HD407A4669H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HD407A4669H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HD407A4669H?
HD407A4669H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HD407A4669H 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 HD407A4669H?
For technical support, including HD407A4669H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD407A4669H requirements.
6.How does Aetrix verify that HD407A4669H is sourced from the original manufacturer or authorized distributors?
All HD407A4669H 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 HD407A4669H meets industry standards.
7.What is the process for return or replacement of HD407A4669H?
All HD407A4669H units undergo pre-shipment inspection (PSI). If there is an issue with HD407A4669H, 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 HD407A4669H part is unused and in its original packaging.
Return procedure for HD407A4669H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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