My Inquiry
My Account
Renesas M37546G4GP#U0
- Part No.:
- M37546G4GP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
M37546G4GP#U0.pdf
- Description:
- IC MCU 8BIT 16KB QZROM 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M37546G4GP#U0 from Renesas Electronics is a single-chip 8-bit CMOS microcomputer with QzROM, featuring 16 KB ROM, 512 bytes RAM, 25 programmable I/O ports, 10-bit 6-channel A/D converter, and built-in power-on reset and low-voltage detection circuits - deployed in industrial control panels requiring deterministic real-time response and analog sensor interfacing.
For engineers reviewing the M37546G4GP#U0 datasheet, M37546G4GP#U0 pinout, M37546G4GP#U0 application, or M37546G4GP#U0 equivalent, key selection criteria include its 32-pin LQFP (PLQP0032GB-A) package, dual 8-bit/16-bit timer architecture, UART/clock-synchronous serial interface support, and operating voltage range down to 1.8 V with on-chip oscillator.
Technical Context
The M37546G4GP#U0 implements the 740-family instruction set with 71 basic instructions and minimum 0.25 µs execution time at 8 MHz in double-speed mode. Its CPU includes accumulator, index registers X/Y, stack pointer, and 16-bit program counter with zero-page and special-page addressing modes.
It integrates a clock generating circuit supporting ceramic resonator, quartz crystal, RC, or on-chip oscillator configurations; a watchdog timer; power-on reset and low-voltage detection circuits; and peripheral blocks including two 8-bit timers, two 16-bit timers, four output compare channels, two input capture channels, and six analog input channels referenced to VREF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ROM size | 16 KB user-programmable QzROM (including function set ROM) |
| RAM size | 512 bytes for data storage and stack operations |
| CPU core | 8-bit 740-family compatible with 71 instructions and 0.25 µs min. instruction cycle |
| A/D converter | 10-bit resolution across 6 channels, referenced to external VREF pin |
| Timers | Two 8-bit timers + two 16-bit timers with output compare (4 ch.) and input capture (2 ch.) |
| Serial interface | Dual 8-bit modules supporting UART or clock-synchronized communication |
| Supply voltage | 1.8–5.5 V (on-chip oscillator), 2.2–5.5 V (1 MHz RC), 4.5–5.5 V (8 MHz ceramic, double-speed) |
| Operating temp. | –20 °C to +85 °C, rated for industrial equipment environments |
Pinout & Package
Package: PLQP0032GB-A - 32-pin 0.8 mm-pitch plastic LQFP, RoHS-compliant, surface-mountable with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Primary power domain (4.5–5.5 V typical); CNVSS provides separate analog ground reference |
| XIN / XOUT | Crystal/resonator interface | Accepts ceramic resonator, quartz crystal, or RC network; supports on-chip oscillator when XIN tied to VCC |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and initializes peripherals |
| P00–P07 | 8-bit bidirectional I/O port | LED drive-capable with programmable pull-up; CAP0/CMP0 functions support timing and comparison |
| P10–P14 | 5-bit bidirectional I/O port | Includes RXD1/TXD1/SCLK1/SRDY1/CNTR0 for serial comms and counter input |
| P20–P25 | 6-bit analog/digital I/O port | AN0–AN5 serve as A/D converter inputs; share digital I/O capability |
| P30–P34, P37 | 6-bit bidirectional I/O port | Supports CAP1/CMP2/CMP3/INT0/INT1; high-drive LED outputs with configurable pull-up |
| VREF | Analog reference voltage | External reference for A/D converter; enables precise ratiometric measurements |
Key Features
| Feature | Design Value |
|---|---|
| Function set ROM | Pre-configures peripheral enablement and security settings immediately after reset, eliminating boot initialization code |
| Low-voltage detection | Built-in circuit triggers reset below user-selectable threshold, preventing erratic operation during brownout |
| Power-on reset | On-chip circuit ensures reliable initialization at power-up without external RC network |
| On-chip oscillator | Enables full operation from 1.8 V with no external timing components, reducing BOM count and board space |
| LED drive capability | Selected pins (P00–P07, P30–P34, P37) support direct LED sinking up to 20 mA per pin via software configuration |
| Key-on wakeup | Interrupt-capable inputs (e.g., P37/INT0) allow low-power sleep mode exit via external switch closure |
Applications
| Industrial HMI Panel | Smart Sensor Node |
|---|---|
Use Scenario: Standalone operator interface with pushbuttons, LEDs, and analog potentiometer inputs in factory automation cabinets. IC Role / Device Role / Timing Role: Central controller executing real-time polling of inputs, driving status LEDs, and managing UART-based diagnostics. Use Value: Integrated A/D (6 ch.), 25 I/O lines, and LED drive capability eliminate external drivers and reduce component count by ≥4 discrete parts. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and light intensity with periodic wireless transmission. IC Role / Device Role / Timing Role: Low-power system controller managing sensor acquisition, data preprocessing, and wake-up scheduling using watchdog and key-on interrupts. Use Value: 1.8 V minimum operating voltage and on-chip oscillator enable stable operation across battery discharge curve without external crystal. |
| Programmable Logic Controller Module | Appliance Motor Control Board |
Use Scenario: DIN-rail mounted I/O expansion module accepting digital inputs, analog feedback, and driving relay outputs in HVAC systems. IC Role / Device Role / Timing Role: Deterministic state-machine executor with precise timer-triggered sampling (16-bit timers) and interrupt-driven I/O handling. Use Value: Dual 16-bit timers with input capture support accurate RPM measurement from tachometer signals; 18 interrupt sources ensure responsive event handling. | Use Scenario: Washing machine main control board regulating motor speed, water level, and heating elements via TRIAC and PWM outputs. IC Role / Device Role / Timing Role: Real-time actuator coordinator using output compare for PWM generation and A/D for pressure/temperature sensing. Use Value: Four output compare channels generate independent PWM waveforms for motor phase control and heater duty cycling without CPU overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M37546G2GP#U0 | 8 KB ROM, 384 bytes RAM, identical pinout and peripheral set | Lower memory capacity limits firmware complexity and feature set scalability | Select when application firmware fits within 8 KB and cost sensitivity outweighs future upgrade path |
| RL78/G13 R5F100LEA | 16 KB flash, 2 KB RAM, enhanced ADC (10-bit × 8 ch.), 20 MHz max. frequency, I²C/SPI support | Modern flash-based architecture with debug interface, lower active current, and expanded communication options | Choose for new designs requiring field firmware updates, lower power, or additional serial protocols beyond UART |
Compared with M37546G4GP#U0, M37546G2GP#U0 offers identical functionality at reduced memory density, while RL78/G13 R5F100LEA provides flash reprogrammability, higher integration, and broader ecosystem support - making it suitable for next-generation products where longevity and toolchain maturity matter.
Availability
M37546G4GP#U0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, PLC modules, and appliance motor control boards requiring stable component supply and long-term production continuity.
Supply support for M37546G4GP#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 industrial, automotive, and infrastructure markets.
The 7546 Group - including M37546G4GP#U0 - was designed for cost-sensitive, high-reliability industrial control applications requiring integrated analog interfaces, deterministic timing, and minimal external components.
FAQ
What is the maximum operating frequency of the M37546G4GP#U0?
The M37546G4GP#U0 supports a maximum oscillation frequency of 8 MHz in double-speed mode using a ceramic resonator. At this frequency, the minimum instruction execution time is 0.25 µs. The device also operates at lower frequencies (e.g., 1–4 MHz) under RC or on-chip oscillator configurations, with corresponding voltage range adjustments per the datasheet.
Does the M37546G4GP#U0 support in-circuit programming or debugging?
No, the M37546G4GP#U0 contains QzROM (mask-programmed ROM) and does not support in-circuit programming or debug interface access. Firmware must be finalized before manufacturing, and verification requires external test fixtures or pre-programmed samples. This contrasts with flash-based alternatives like the RL78/G13 series.
What are the valid power supply voltage ranges for the M37546G4GP#U0?
The M37546G4GP#U0 operates from 1.8 V to 5.5 V when using the on-chip oscillator, and from 2.2 V to 5.5 V at 1 MHz RC oscillation. For 8 MHz ceramic resonator operation in double-speed mode, the required range is 4.5 V to 5.5 V. All ranges are specified over the –20 °C to +85 °C industrial temperature grade.
How many analog input channels does the M37546G4GP#U0 have, and what is their resolution?
The M37546G4GP#U0 features six analog input channels (AN0–AN5) multiplexed on port P2, each with 10-bit resolution. Conversion uses an external reference voltage applied to the VREF pin, enabling ratiometric accuracy relative to sensor excitation or supply rails.
Is the M37546G4GP#U0 pin-compatible with other members of the 7546 Group?
Yes, the M37546G4GP#U0 is pin-compatible with all variants in the 7546 Group sharing the same package type - specifically the PLQP0032GB-A (32-pin LQFP). This includes M37546G2GP#U0 and M37546G4-XXXGP variants, enabling hardware reuse across memory-size variants without PCB changes.
M37546G4GP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-LQFP
- Series:
- 740/38000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 740
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SIO, UART/USART
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- QzROM
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
M37546G4GP#U0 FAQ
1.How can I place an order for M37546G4GP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M37546G4GP#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 M37546G4GP#U0 reliable?
The price and inventory of M37546G4GP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M37546G4GP#U0 is usually 5 days.
3.What payment methods are accepted for M37546G4GP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M37546G4GP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M37546G4GP#U0?
M37546G4GP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M37546G4GP#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 M37546G4GP#U0?
For technical support, including M37546G4GP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M37546G4GP#U0 requirements.
6.How does Aetrix verify that M37546G4GP#U0 is sourced from the original manufacturer or authorized distributors?
All M37546G4GP#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 M37546G4GP#U0 meets industry standards.
7.What is the process for return or replacement of M37546G4GP#U0?
All M37546G4GP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M37546G4GP#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 M37546G4GP#U0 part is unused and in its original packaging.
Return procedure for M37546G4GP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M37546G4GP#U0 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
