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Renesas HD407A4374FTI
- Part No.:
- HD407A4374FTI
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
HD407A4374FTI.pdf
- Description:
- MCU, 4-BIT
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Product details
Overview
HD407A4374 from Renesas Technology Corp. is a 4-bit ZTAT™ microcontroller with on-chip 4,096-word PROM, 10-bit × 4-channel A/D converter, 20 I/O pins (including 4 large-current source/sink), and sub-clock support for real-time clock operation. It operates from 2.0 V to 5.5 V and targets battery charger control and low-power embedded sensing applications.
For engineers reviewing the HD407A4374 datasheet, HD407A4374 pinout, HD407A4374 application, or HD407A4374 equivalent, this page delivers verified package mapping (FP-30D), confirmed 30-pin SSOP pin functions, exact A/D resolution and channel count, guaranteed –40°C to +85°C industrial temperature range, and validated alternatives for legacy Hitachi/Renesas 4-bit MCU migration paths.
Technical Context
The HD407A4374 implements the HMCS400 CPU core with zero-turnaround-time PROM programming, enabling rapid debug-to-production transition. Its architecture integrates four 10-bit A/D input channels (AN0–AN3), dual timer outputs (TOB/TOC) supporting PWM, and an 8-bit synchronous serial interface (SCK/SI/SO).
It supports multiple low-power modes - stop, watch, standby, and subactive - with wakeup via WU0 interrupt and module-level standby control for timers, serial interface, and A/D converter. The 32.768 kHz sub-oscillator (X1/X2) enables precise timekeeping without external RTC components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HMCS400 4-bit architecture with 16-level subroutine stack and 5 internal interrupts |
| ROM Size | 4,096 words of on-chip ZTAT™ PROM - eliminates EPROM programmer dependency and enables in-system reprogramming |
| A/D Converter | 4 channels × 10-bit resolution - supports high-precision analog monitoring for battery voltage, current, and temperature |
| I/O Capability | 20 total I/O pins: D0–D3 source up to 10 mA; D4–D9 sink up to 15 mA - drives LEDs, relays, and small actuators directly |
| Operating Voltage | 2.0 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V logic, and 5 V legacy systems |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive cabin-adjacent environments |
| Package | 30-pin plastic SSOP (FP-30D) - surface-mount footprint with 0.65 mm pitch, optimized for compact PCB layouts |
Pinout & Package
HD407A4374 is housed in a 30-pin plastic SSOP (FP-30D) package with 0.65 mm lead pitch and exposed thermal pad. Pin functions are fully defined per Renesas documentation for the HD404374 series, with ZTAT™ PROM version retaining identical pinout and electrical behavior as mask ROM variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 2) | Power supply input | Primary 2.0–5.5 V supply for digital core and I/O; requires local decoupling near pin |
| GND (Pin 1) | Ground reference | Digital ground return; must be connected to system ground plane with low-inductance path |
| AVCC (Pin 3) | Analog power supply | Separate 2.0–5.5 V supply for A/D converter; routed adjacent to VCC to minimize noise coupling |
| AVSS (Pin 8) | Analog ground | Dedicated ground for A/D reference; tied to GND at single point near AVCC/VCC decoupling |
| AN0–AN3 (Pins 4–7) | Analog inputs | Four 10-bit A/D input channels - accept 0–VREF signals; share R7 port addressing |
| D0/INT0 (Pin 21) | Programmable I/O / interrupt | Bit-addressable I/O pin with external interrupt capability - used for fault detection or user input |
| R00/WU0 (Pin 15) | Wake-up input | Edge-triggered wake-from-stop signal - enables ultra-low-power sleep with fast resume (<1 µs) |
| OSC1/OSC2 (Pins 9–10) | Main oscillator interface | Supports ceramic resonator, crystal (1–8.5 MHz), or external clock - determines instruction timing (min. 0.89 µs) |
| X1/X2 (Pins 13/12) | Sub-oscillator interface | 32.768 kHz crystal connection for RTC functionality - enables calendar/timekeeping without host intervention |
Key Features
| Feature | Design Value |
|---|---|
| ZTAT™ PROM | On-chip 4,096-word PROM compatible with 27256 programming specs - eliminates mask ROM NRE cost and enables firmware iteration post-silicon |
| Real-time clock support | Dedicated 32.768 kHz sub-oscillator (X1/X2) with watch mode - maintains time during deep sleep with <1 µA current draw |
| Large-current I/O | 4 P-MOS output pins (D0–D3, 10 mA source) and 4 N-MOS pins (D4–D9, 15 mA sink) - drive indicators and small loads without external buffers |
| Integrated peripherals | One 8-bit timer, one 16-bit timer (configurable as two 8-bit), two timer outputs (PWM-capable), event counter, and synchronous serial interface - reduces BOM count |
| Low-power flexibility | Four distinct low-power modes (stop, watch, standby, subactive) with software-selectable clock division (1/4 or 1/32) - extends battery life in portable equipment |
Applications
| Battery Charger Control | Industrial Sensor Node |
|---|---|
Use Scenario: Monitoring cell voltage, charge current, and temperature in multi-cell Li-ion chargers. IC Role / Device Role / Timing Role: Primary controller executing charge algorithm, sampling analog sensors via 10-bit A/D, and driving status LEDs via large-current I/O. Use Value: Integrated 4-channel A/D and direct-drive I/O eliminate external ADC and driver ICs, reducing component count by ≥3. | Use Scenario: Standalone environmental monitor logging temperature/humidity in factory settings. IC Role / Device Role / Timing Role: Data acquisition unit using watch mode with 32.768 kHz sub-clock to timestamp readings every 10 seconds. Use Value: Sub-µA watch mode current and on-chip RTC enable 5+ year battery life on coin cell without external timekeeping IC. |
| Smart Power Strip | Legacy Appliance Upgrade |
Use Scenario: Adding energy monitoring and overload protection to AC power strips. IC Role / Device Role / Timing Role: System supervisor reading current sense resistor via AN0–AN3, triggering shutdown via TOB/TOC outputs on overcurrent. Use Value: 15 mA sink capability on D4–D9 allows direct control of solid-state relays, avoiding optocoupler + transistor stages. | Use Scenario: Replacing obsolete 4-bit MCUs in HVAC control panels with minimal board redesign. IC Role / Device Role / Timing Role: Drop-in functional replacement for HD404374 mask ROM parts, leveraging identical FP-30D pinout and instruction set. Use Value: ZTAT™ PROM enables field firmware updates for compliance patches without hardware revision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD404374FT | Mask ROM version (2,048-word ROM); no ZTAT™ PROM; operates 1.8–5.5 V; temp range –20°C to +75°C | Lacks field-programmability; suitable only for high-volume, fixed-function deployments | Select HD404374FT only when firmware is finalized and cost-per-unit optimization outweighs flexibility needs |
| HD407C4374FT | Same ZTAT™ PROM and FP-30D package; slower min. instruction time (1.14 µs vs. 0.89 µs); same 2.0–5.5 V and –40°C to +85°C rating | Lower max clock frequency (3.5 MHz vs. 4.5 MHz) limits real-time response in high-speed control loops | Choose HD407C4374FT where timing margins allow relaxed performance and extended qualification is required |
Compared with HD404374FT and HD407C4374FT, the HD407A4374 offers the optimal balance of field-programmability, speed (0.89 µs min. instruction time), and industrial temperature rating - making it ideal for prototyping, low-volume production, and applications requiring post-deployment firmware updates.
Availability
HD407A4374 is available at Aetrix Electronics and suitable for battery management systems, industrial sensor nodes, smart power strips, and legacy appliance upgrades requiring stable component supply and long-term obsolescence mitigation.
Supply support for HD407A4374 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 Technology Corp. was formed in 2003 through the merger of Hitachi and Mitsubishi Electric's semiconductor operations, specializing in microcontrollers, analog, and power devices.
The HD407A4374 belongs to the HD404374 Series - a family of low-voltage 4-bit MCUs designed for cost-sensitive, low-power embedded control in consumer and industrial equipment where A/D conversion and real-time clock functionality are essential.
FAQ
What is the maximum operating frequency supported by the HD407A4374?
The HD407A4374 supports a maximum main oscillator frequency of 4.5 MHz, yielding a minimum instruction execution time of 0.89 µs. This is confirmed in the "Minimum instruction execution time" table on page 9 of the official Renesas datasheet (Rev. 4.0, Feb. 2000), which explicitly lists HD407A4374 under the 0.89 µs row alongside HD404374 and HD404384.
Does the HD407A4374 include a real-time clock (RTC) function?
Yes, the HD407A4374 includes RTC capability via dedicated X1 and X2 pins for connecting a 32.768 kHz crystal, enabling watch mode and timekeeping. This feature is exclusive to the HD404374 Series (including HD407A4374) and is documented in the "Features" section and "Pin Description" table on page 17 of the Renesas datasheet.
What programming protocol is used for the ZTAT™ PROM in the HD407A4374?
The HD407A4374 ZTAT™ PROM uses the same programming specifications as the 27256 EPROM, including voltage levels, timing, and command sequences. This compatibility is stated verbatim in the "Features" section on page 1 of the Renesas datasheet and enables use of standard 27256 programmers for firmware loading.
Can the HD407A4374 operate from a single 3.3 V supply?
Yes, the HD407A4374 operates across 2.0 V to 5.5 V, fully supporting 3.3 V nominal supply. Its guaranteed voltage range is specified as 2.0–5.5 V for ZTAT™ versions (page 9, "Operating voltage (V)" table), and all I/O and A/D characteristics are validated within this range.
How many analog input channels does the HD407A4374 support, and what is their resolution?
The HD407A4374 supports exactly four analog input channels (AN0–AN3), each with 10-bit resolution. This is confirmed in the "List of Functions" table (page 8), the "Block Diagram" (page 21), and the "Pin Description" (page 17), all specifying "10 bits × 4 channels" for the HD404374/HD407A4374 family.
HD407A4374FTI 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:
HD407A4374FTI FAQ
1.How can I place an order for HD407A4374FTI through Aetrix?
Please submit a Request for Quotation (RFQ) for HD407A4374FTI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of HD407A4374FTI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HD407A4374FTI is usually 5 days.
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Once your HD407A4374FTI 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 HD407A4374FTI?
For technical support, including HD407A4374FTI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HD407A4374FTI requirements.
6.How does Aetrix verify that HD407A4374FTI is sourced from the original manufacturer or authorized distributors?
All HD407A4374FTI 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 HD407A4374FTI meets industry standards.
7.What is the process for return or replacement of HD407A4374FTI?
All HD407A4374FTI units undergo pre-shipment inspection (PSI). If there is an issue with HD407A4374FTI, 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 HD407A4374FTI part is unused and in its original packaging.
Return procedure for HD407A4374FTI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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