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Renesas M37549G3FP#U0
- Part No.:
- M37549G3FP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 24-SOP (0.209", 5.30mm Width)
- Datasheet:
-
M37549G3FP#U0.pdf
- Description:
- IC MCU 8BIT 6KB QZROM 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:25,296
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Product details
Overview
M37549G3FP#U0 from Renesas Electronics is a single-chip 8-bit CMOS microcontroller based on the 740 family core, featuring 6 KB QzROM, 256 bytes RAM, integrated 10-bit 8-channel A/D converter, UART/clock-synchronous serial interface, and dual-speed on-chip oscillators (4 MHz high-speed, 250 kHz low-speed). It operates from 1.8 V to 5.5 V and targets embedded control in home appliances and factory automation.
For engineers reviewing the M37549G3FP#U0 datasheet, M37549G3FP#U0 pinout, M37549G3FP#U0 application, or M37549G3FP#U0 equivalent, key selection criteria include its 24-pin SSOP package, built-in power-on reset and low-voltage detection circuits, LED direct-drive capability on eight P0 pins, and support for external ceramic resonator or 32 kHz crystal operation.
Technical Context
The M37549G3FP#U0 implements the standard 740-family instruction set with 71 basic instructions and a minimum execution time of 0.25 µs at 8 MHz in double-speed mode. Its CPU includes an 8-bit accumulator, two 8-bit index registers (X/Y), an 8-bit stack pointer, and a 16-bit program counter, with processor status register flags supporting conditional branching and interrupt handling.
Peripheral integration includes three independent timers (two 8-bit, one 16-bit), 3-channel output compare, 1-channel input capture, watchdog timer, and programmable I/O ports (19-bit general-purpose + 1-bit dedicated output). The clock generating circuit supports multiple oscillation sources: external ceramic resonator, quartz crystal (including 32 kHz), or internal high/low-speed oscillators - all selectable via Function Set ROM configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 740-family 8-bit CPU with 71 instructions and 0.25 µs min. instruction cycle at 8 MHz |
| Memory | 6 KB QzROM (6014 bytes user), 256 bytes RAM - sufficient for compact real-time control firmware |
| A/D Converter | 10-bit resolution × 8 channels - enables precise analog sensor interfacing without external ADC |
| Serial Interface | 8-bit UART or clock-synchronous mode - supports host communication or peripheral synchronization |
| Timers | Two 8-bit timers + one 16-bit timer with 3 output compare / 1 input capture - supports PWM generation and event timing |
| Supply Voltage Range | 1.8–5.5 V across all oscillator modes - allows flexible power design including battery-backed operation |
| Operating Temperature | −20 °C to +85 °C - qualified for industrial and consumer equipment environments |
Pinout & Package
Package: PRSP0024GA-A - 24-pin plastic molded SSOP (0.8 mm pitch), surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P07 | LED-direct-drive I/O port | Configurable as 8-bit bidirectional port with high-current sink capability for driving LEDs directly |
| P10–P17 | Analog/Key-input I/O port | 8-bit multiplexed pins supporting A/D inputs (AN0–AN7), key-on wakeup (KEY0–KEY7), and comparator outputs (CMP0–CMP2) |
| P20/XOUT/XCOUT | Oscillator output / clock source | Output-only pin for ceramic resonator/crystal oscillator feedback or external clock input |
| P21/XIN/XCIN | Oscillator input / clock source | Input pin for ceramic resonator/crystal oscillator; usable as I/O when external clock applied to P20 |
| RESET | Active-low reset input | Asynchronous reset signal requiring logic-low pulse ≥100 ns for reliable initialization |
| CNVSS | Chip operation mode control | Must be tied to VSS to enable normal operation; floating or high state disables chip functionality |
Key Features
| Feature | Design Value |
|---|---|
| Function Set ROM | 3-byte configuration area (FFD8–FFDA) enabling runtime-selectable peripheral modes (LVD enable/disable, watchdog control, STP instruction lock) |
| On-chip Oscillators | Dual-speed internal oscillators (4 MHz typ., 250 kHz typ.) eliminate need for external crystals in cost-sensitive designs |
| Power Management | Built-in power-on reset and low-voltage detection circuits - reduce BOM count and improve system reliability during brownout conditions |
| LED Drive Capability | Eight dedicated P0 pins support direct LED connection with software-selectable high-drive mode - simplifies front-panel interface design |
| Interrupt Architecture | 12 independent interrupt sources with dedicated vectors - enables deterministic real-time response to external events and peripherals |
Applications
| Home Appliance Control | Factory Automation Sensor Node |
|---|---|
Use Scenario: Microcontroller-based washing machine control board managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor control loops, reading analog water pressure sensors via A/D, and driving LED display segments directly. Use Value: Integrated 10-bit A/D and LED drive ports reduce external component count; 6 KB ROM accommodates full state-machine firmware with fault diagnostics. | Use Scenario: Standalone temperature/humidity monitoring node in PLC-peripheral network with RS-485 backhaul. IC Role / Device Role / Timing Role: Data acquisition engine sampling analog sensor outputs, performing local threshold checks, and transmitting alerts via UART interface. Use Value: Built-in UART with clock-synchronous option supports robust serial communication; wide 1.8–5.5 V supply range ensures compatibility with industrial 3.3 V or 5 V rails. |
| Consumer Remote Control Hub | Office Equipment Power Management |
Use Scenario: IR remote repeater unit consolidating signals from multiple remotes and routing commands to AV devices. IC Role / Device Role / Timing Role: Signal decoder and protocol translator using key-on wakeup for low-power standby and UART for command forwarding. Use Value: Eight key-on wakeup inputs allow instant wake from deep sleep on any button press; low-speed on-chip oscillator enables sub-1 µA standby current. | Use Scenario: Power sequencer in multifunction printer controlling DC-DC converter enable timing and thermal shutdown monitoring. IC Role / Device Role / Timing Role: Supervisor IC monitoring VCC with built-in low-voltage detection and generating precise power-up delays via 16-bit timer. Use Value: On-chip LVD circuit triggers reset at configurable thresholds (e.g., 4.25 V); watchdog timer prevents firmware lockup during power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M37549G2FP#U0 | 4 KB ROM, 256 bytes RAM - 2 KB smaller program memory than M37549G3FP#U0 | Suitable for simpler control tasks with less complex state logic or smaller firmware footprint | Select when firmware size is confirmed ≤4 KB and no future expansion is planned |
| M37549G1FP#U0 | 2 KB ROM, 192 bytes RAM - reduced memory and no CMP2/CMP1 functions on P12/P11 | Targeted at ultra-low-cost, minimal-feature applications such as basic timer or LED sequencer | Choose only for legacy replacement or cost-driven designs where memory headroom is not required |
Compared with M37549G2FP#U0 and M37549G1FP#U0, the M37549G3FP#U0 provides the largest ROM capacity (6 KB) and full peripheral feature set across the 7549 Group, making it the optimal choice for new designs requiring firmware scalability and comprehensive analog/digital I/O integration.
Availability
M37549G3FP#U0 is available at Aetrix Electronics and suitable for home appliance control, factory automation sensor nodes, and office equipment power management requiring stable component supply and long-term production continuity.
Supply support for M37549G3FP#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 global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and consumer markets.
The 7549 Group microcontrollers were designed for cost-sensitive, low-power embedded control applications in home electronics and industrial equipment - emphasizing integrated peripherals, flexible clocking, and robust power management.
FAQ
What is the maximum operating frequency of the M37549G3FP#U0?
The M37549G3FP#U0 supports a maximum external oscillation frequency of 8 MHz when using a ceramic resonator in double-speed mode. Its internal high-speed oscillator operates at a typical 4 MHz, and the low-speed oscillator at 250 kHz. All frequencies are subject to voltage-dependent limits - for example, 8 MHz operation requires VCC ≥4.5 V in double-speed mode with ceramic resonator.
Does the M37549G3FP#U0 include a hardware watchdog timer?
Yes, the M37549G3FP#U0 integrates a 16-bit watchdog timer that can be enabled or disabled via the Function Set ROM configuration. When enabled, it provides fail-safe recovery from software hang conditions by generating a system reset if not periodically cleared by firmware.
Can the M37549G3FP#U0 operate from a 3.3 V supply?
Yes, the M37549G3FP#U0 supports 3.3 V operation across multiple clock configurations: it runs at up to 4 MHz with ceramic resonator in high-speed mode (VCC ≥2.4 V), and at 250 kHz using the low-speed on-chip oscillator (VCC ≥1.8 V). This makes it compatible with standard 3.3 V system rails without level-shifting.
How many analog input channels does the M37549G3FP#U0 support?
The M37549G3FP#U0 features an integrated 10-bit A/D converter with eight analog input channels (AN0–AN7), mapped to P10–P17 pins. Each channel supports simultaneous use with key-on wakeup and comparator functions, enabling mixed-signal applications like sensor monitoring with push-button interface.
Is the M37549G3FP#U0 pin-compatible with other members of the 7549 Group?
Yes, the M37549G3FP#U0 shares identical pinout and package (PRSP0024GA-A, 24-pin SSOP) with M37549G2FP#U0 and M37549G1FP#U0. Firmware and hardware designs are interchangeable across these variants, differing only in ROM/RAM size and minor peripheral enablement - allowing scalable development within the same PCB layout.
M37549G3FP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 24-SOP (0.209", 5.30mm Width)
- Series:
- 740/38000
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 740
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SIO, UART/USART
- Peripherals:
- LED, LVD, POR, WDT
- Number of I/O:
- 19
- Program Memory Size:
- 6KB (6K x 8)
- Program Memory Type:
- QzROM
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
M37549G3FP#U0 FAQ
1.How can I place an order for M37549G3FP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M37549G3FP#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 M37549G3FP#U0 reliable?
The price and inventory of M37549G3FP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M37549G3FP#U0 is usually 5 days.
3.What payment methods are accepted for M37549G3FP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M37549G3FP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M37549G3FP#U0?
M37549G3FP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M37549G3FP#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 M37549G3FP#U0?
For technical support, including M37549G3FP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M37549G3FP#U0 requirements.
6.How does Aetrix verify that M37549G3FP#U0 is sourced from the original manufacturer or authorized distributors?
All M37549G3FP#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 M37549G3FP#U0 meets industry standards.
7.What is the process for return or replacement of M37549G3FP#U0?
All M37549G3FP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M37549G3FP#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 M37549G3FP#U0 part is unused and in its original packaging.
Return procedure for M37549G3FP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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