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Renesas M34286G2GP#U0
- Part No.:
- M34286G2GP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M34286G2GP#U0.pdf
- Description:
- IC MCU 4BIT 2.25KB QZROM 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:477
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Product details
Overview
M34286G2GP#U0 from Renesas Electronics is a 4-bit single-chip CMOS microcomputer optimized for infrared remote control transmitters. It integrates 2048 words × 9-bit mask ROM, 64 words × 4-bit RAM, dual 8-bit timers (Timer 1 with auto-control carrier output, Timer 2 with dual-reload carrier generation), and 16 I/O lines across ports D, E, G, and CARR - all operating from 1.8 V to 3.6 V supply.
For engineers reviewing the M34286G2GP#U0 datasheet, M34286G2GP#U0 pinout, M34286G2GP#U0 application, or M34286G2GP#U0 equivalent, key selection criteria include its ceramic-resonator-based system clock (XIN/XOUT), key-on wakeup capability across 15 pins (D0–D7, E0–E2, G0–G3), RAM back-up mode (0.1 µA), and dedicated CMOS carrier wave output on CARR pin for IR modulation.
Technical Context
The M34286G2GP#U0 implements a 72-instruction 4-bit CPU core with 4-level subroutine nesting and ALU-based arithmetic logic. Its dual-timer architecture enables independent carrier wave generation (Timer 2) and precise output timing control (Timer 1), both configurable via V1/V2 control registers and synchronized to f(XIN)/2 system clock.
System clock generation relies on an external ceramic resonator between XIN and XOUT (internal feedback resistor included), supporting instruction execution at 2.0 µs minimum cycle time (f(XIN) = 4.0 MHz). Power management includes voltage drop detection (1.5 V/1.7 V thresholds), power-on reset, and RAM back-up mode - all essential for battery-powered remote control operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 4-bit CMOS CPU with 72 basic instructions and 4-level stack |
| ROM Size | 2048 words × 9 bits mask ROM - stores firmware and IR protocol tables |
| RAM Size | 64 words × 4 bits - supports state retention and key-scan buffers |
| Supply Voltage | 1.8 V to 3.6 V - compatible with single-cell alkaline or lithium coin cells |
| Min Instruction Time | 2.0 µs at f(XIN) = 4.0 MHz - enables fast IR frame encoding |
| Operating Temp | –40 °C to +85 °C - qualified for consumer indoor/outdoor remote use |
| Power Consumption | 400 µA active (VDD = 3 V, f(XIN) = 4 MHz); 0.1 µA RAM back-up - extends battery life |
Pinout & Package
Package: 20-pin plastic LSSOP (PLSP0020JB-A / 20P2F-A), 0.65 mm pitch, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Positive supply rail (1.8–3.6 V); must be decoupled near pin |
| VSS | Ground | 0 V reference; low-impedance return path required |
| XIN / XOUT | Oscillator interface | Connects external ceramic resonator (no external capacitor needed) |
| D0–D7 | I/O port | 8-bit bidirectional port with programmable pull-down and key-on wakeup (H-level sense) |
| E0–E1 | Output port | 2-bit P-channel open-drain outputs for LED drive or logic interfacing |
| E2 | Input port | 1-bit input-only with pull-down and key-on wakeup (H-level sense) |
| G0–G3 | I/O port | 4-bit bidirectional port with pull-down and key-on wakeup (H-level sense) |
| CARR | Carrier output | CMOS output pin for modulated IR carrier wave (directly drives IR LED driver stage) |
Key Features
| Feature | Design Value |
|---|---|
| Carrier Wave Auto-Control | Timer 1 generates precise timing signals to control CARR output duty cycle without CPU intervention |
| Dual Reload Timer 2 | Timer 2 uses two reload registers to independently set "H" and "L" intervals of IR carrier waveform |
| Key-On Wakeup | 15 dedicated wake-up pins (D0–D7, E0–E2, G0–G3) enable ultra-low-power standby until button press |
| RAM Back-Up Mode | Retains RAM contents at 0.1 µA while disabling CPU and peripherals - preserves remote state across battery swaps |
| Watchdog & Voltage Monitor | 14-bit watchdog timer and voltage-drop detection (1.5 V/1.7 V thresholds) ensure reliable reset during brown-out |
Applications
| TV Remote Transmitter | AC Remote Transmitter |
|---|---|
Use Scenario: Battery-powered handheld remote sending NEC or RC-5 encoded IR commands to display devices. IC Role / Device Role / Timing Role: Primary controller executing protocol encoding, key scanning, and carrier wave generation via CARR pin. Use Value: Dual-timer architecture enables simultaneous carrier frequency (e.g., 38 kHz) and burst timing control - eliminating external timing ICs. | Use Scenario: Compact HVAC remote with multi-function keys and extended battery life requirements. IC Role / Device Role / Timing Role: System-on-chip managing keypad matrix scan, EEPROM-less configuration storage, and IR modulation timing. Use Value: RAM back-up mode retains user settings (temperature presets, fan speed) during battery replacement - no reconfiguration needed. |
| Set-Top Box Remote | Audio System Remote |
Use Scenario: Multi-protocol remote supporting IR learning and device-specific command sets. IC Role / Device Role / Timing Role: Firmware-executed protocol interpreter with real-time carrier timing control using Timer 1 and Timer 2. Use Value: 2048-word ROM provides space for multiple IR protocols and dynamic key mapping - no external memory required. | Use Scenario: Premium audio remote requiring low EMI, consistent carrier stability, and tactile feedback timing. IC Role / Device Role / Timing Role: Timing-critical controller synchronizing IR pulse trains with mechanical switch debounce and LED indicators. Use Value: Ceramic resonator interface (XIN/XOUT) delivers stable 38 kHz carrier ±2% over temperature - meets IR receiver sensitivity specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit remote control microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD6417206P | Same 4-bit architecture but 1024-word ROM; lacks dual-reload Timer 2; no CARR pin | Requires external carrier generator; limited protocol storage | Select only if legacy HD6417206P design reuse is mandatory and carrier timing flexibility is not required |
| RL78/I1A | 16-bit RL78 core; 16 KB flash; integrated IR transmitter peripheral; 32-pin LQFP | Higher cost and footprint; supports advanced protocols (RC-MM, Sony SIRC) and firmware updates | Choose when future-proofing, field-upgradable firmware, or multi-protocol support outweighs BOM cost and size constraints |
Compared with HD6417206P and RL78/I1A, the M34286G2GP#U0 delivers optimal balance of cost, size, and IR-specific functionality - retaining dedicated carrier control hardware and ultra-low-power wake-up while fitting in compact 20-pin LSSOP packaging ideal for mass-produced remotes.
Availability
M34286G2GP#U0 is available at Aetrix Electronics and suitable for TV remote transmitters, AC remote transmitters, set-top box remotes, and audio system remotes requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for M34286G2GP#U0 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 automotive, industrial, and consumer markets.
The 4286 Group - including M34286G2GP#U0 - was designed specifically for cost-sensitive, battery-operated infrared remote control transmitters, emphasizing ultra-low-power operation, integrated carrier timing, and minimal external components.
FAQ
What is the maximum ceramic resonator frequency supported by M34286G2GP#U0?
The M34286G2GP#U0 supports ceramic resonators up to 4.0 MHz, as confirmed by the minimum instruction execution time specification of 2.0 µs at f(XIN) = 4.0 MHz. Higher frequencies are not characterized or guaranteed per the REJ03B0251-0100 datasheet. Operating beyond this limit may cause timing violations in the 4-bit CPU core or timer subsystems.
Does M34286G2GP#U0 support external crystal oscillators?
No, the M34286G2GP#U0 is designed exclusively for ceramic resonators connected between XIN and XOUT. The internal feedback resistor and oscillator circuit are optimized for ceramic units - external quartz crystals are not supported and will not start reliably.
How many key-on wakeup pins does M34286G2GP#U0 have, and what is their trigger condition?
The M34286G2GP#U0 has 15 key-on wakeup pins: D0–D7 (8 pins), E0–E2 (3 pins), and G0–G3 (4 pins). All trigger on rising-edge detection ("H" level sense) when the internal pull-down transistor is enabled via software configuration - allowing wake-up from RAM back-up mode upon button press.
Can M34286G2GP#U0 generate carrier frequencies other than 38 kHz?
Yes - M34286G2GP#U0 can generate carrier frequencies from approximately 20 kHz to 50 kHz by configuring Timer 1 and Timer 2 reload values and selecting appropriate system clock dividers (f(XIN)/2, f(XIN)/4, or f(XIN)). The exact frequency depends on f(XIN), selected divider, and reload register values per the timing equations in Section 12 of REJ03B0251-0100.
Is there a built-in EEPROM or flash memory in M34286G2GP#U0?
No, M34286G2GP#U0 contains only mask ROM (2048 words × 9 bits) for program storage and SRAM (64 words × 4 bits) for runtime data. It does not include EEPROM or flash memory. User-configurable settings must be stored in RAM with back-up mode or implemented externally.
M34286G2GP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- 720/4500
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 720
- Core Size:
- 4-Bit
- Speed:
- 4MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 14
- Program Memory Size:
- 2.25KB (2K x 9)
- Program Memory Type:
- QzROM
- EEPROM Size:
- -
- RAM Size:
- 64 x 4
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
M34286G2GP#U0 FAQ
1.How can I place an order for M34286G2GP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M34286G2GP#U0 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 M34286G2GP#U0 reliable?
The price and inventory of M34286G2GP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M34286G2GP#U0 is usually 5 days.
3.What payment methods are accepted for M34286G2GP#U0?
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Note: Certain payment methods may incur a processing fee.
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M34286G2GP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M34286G2GP#U0 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 M34286G2GP#U0?
For technical support, including M34286G2GP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M34286G2GP#U0 requirements.
6.How does Aetrix verify that M34286G2GP#U0 is sourced from the original manufacturer or authorized distributors?
All M34286G2GP#U0 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 M34286G2GP#U0 meets industry standards.
7.What is the process for return or replacement of M34286G2GP#U0?
All M34286G2GP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M34286G2GP#U0, 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 M34286G2GP#U0 part is unused and in its original packaging.
Return procedure for M34286G2GP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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