My Inquiry
My Account
Renesas M37641F8FP#U0
- Part No.:
- M37641F8FP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 80-BQFP
- Datasheet:
-
M37641F8FP#U0.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:216
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M37641F8FP#U0 from Renesas Technology Corp. is a single-chip 8-bit CMOS microcomputer based on the 7600-series core (740-family compatible), featuring 32 KB flash ROM, 2.5 KB RAM, USB 1.1 transceiver, dual 16-bit timers, and 66 programmable I/O ports - designed for PC peripheral devices including printers, scanners, and modems.
For engineers reviewing the M37641F8FP#U0 datasheet, M37641F8FP#U0 pinout, M37641F8FP#U0 application, or M37641F8FP#U0 equivalent, this page delivers verified technical context, package mapping to 80-pin QFP (80P6N-A), USB timing control, flash rewrite capability, and real-world interface roles in embedded peripheral systems.
Technical Context
The M37641F8FP#U0 implements the 7600-series instruction set with 71 basic machine-language instructions and minimum 83 ns instruction execution at 24 MHz. Its CPU supports single-chip, memory expansion, and microprocessor modes - though microprocessor mode is explicitly disabled in flash versions.
It integrates a built-in clock generating circuit supporting external ceramic resonator or quartz-crystal oscillator (XIN/XOUT), plus an independent sub-clock oscillator (XCIN/XCOUT) for USB SOF generation. The USB function unit complies fully with USB Specification Rev. 1.1 and includes D+/D− differential signaling with internal pull-up and series resistor support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 7600-series (740-family compatible) 8-bit CPU with 71 instructions |
| Flash ROM / RAM | 32 KB flash ROM (user-accessible full range); 2.5 KB RAM for data + stack |
| USB Interface | Full-speed USB 1.1 transceiver with integrated D+/D− drivers and SOF generator |
| Timers | Two 16-bit timers (X, Y); three 8-bit timers (1–3); one 8-bit special count source generator |
| I/O & Peripherals | 66 programmable I/O ports; two UARTs; one serial I/O; two-channel DMAC; master CPU bus interface |
| Operating Voltage | 4.15–5.25 V @ 24 MHz/12 MHz φ; 3.00–3.60 V @ 24 MHz/6 MHz φ - dual-voltage operation supported |
| Package | 80-pin plastic QFP (80P6N-A), 0.8 mm pitch, surface-mount compatible |
Pinout & Package
Package: 80-pin plastic quad flat pack (80P6N-A), 0.8 mm lead pitch, RoHS-compliant surface-mount package with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P00–P07/AB0–AB7 | Address/Data Bus / I/O Port | 8-bit bidirectional port; functions as lower address bus (AB0–AB7) during external memory access |
| P10–P17/AB8–AB15 | Address Bus / I/O Port | 8-bit bidirectional port; functions as upper address bus (AB8–AB15) during external memory access |
| P20–P27/DB0–DB7 | Data Bus / I/O Port | 8-bit bidirectional port; functions as data bus (DB0–DB7) in master CPU bus interface mode |
| P30/RDY, P36/WR, P37/RD | Bus Control Signals | Ready, write strobe, and read strobe pins for synchronous external memory interfacing |
| USB D+, USB D− | USB Differential Pair | Compliant full-speed USB 1.1 physical layer; requires 27–33 Ω series termination per line |
| XIN, XOUT | Main Clock Oscillator | Connects to external crystal or ceramic resonator (1–24 MHz); defines system clock frequency |
| XCIN, XCOUT | Sub-Clock Oscillator | Dedicated 48 MHz oscillator for USB SOF timing; independent of main clock domain |
| RESET | Active-Low Reset Input | Asynchronous reset signal; must be held low ≥100 ns after power stabilization |
Key Features
| Feature | Design Value |
|---|---|
| Flash Memory Rewrite | Software-controlled byte-level programming and block/batch erasing (100-cycle endurance) |
| USB 1.1 Compliance | Fully integrated transceiver meeting USB Spec Rev. 1.1 electrical and protocol timing requirements |
| Interrupt System | 24 interrupt sources with individual vectors; includes key-input wake-up and USB SOF interrupts |
| Power Supply Flexibility | Supports both 5 V (4.15–5.25 V) and 3.3 V (3.00–3.60 V) operation with shared pinout and logic levels |
| On-Chip Clock Generation | Dual oscillators: main (XIN/XOUT) + sub-clock (XCIN/XCOUT); no external PLL required for USB timing |
Applications
| Printer Controller | Scanner Interface Module |
|---|---|
|
Use Scenario: Embedded controller managing print job queuing, raster image decompression, and parallel/USB host interface. IC Role / Device Role / Timing Role: Primary MCU executing firmware, driving parallel printer port (P0–P3), and handling USB device enumeration via dedicated D+/D− pins. Use Value: Integrated USB 1.1 transceiver eliminates external PHY; 32 KB flash enables field-upgradable firmware without external memory. |
Use Scenario: Real-time image acquisition subsystem synchronizing CCD sensor output, ADC sampling, and USB bulk transfer to host PC. IC Role / Device Role / Timing Role: Master controller using DMAC channels to offload pixel data movement from RAM to USB endpoint buffers; UART2 used for debug console. Use Value: Two-channel DMAC reduces CPU load during high-throughput image transfers; 2.5 KB RAM accommodates multi-line scan buffers. |
| Modem Data Pump | Audio Peripheral Hub |
|
Use Scenario: V.90/V.92 modem implementing analog line interface, DSP-based modulation/demodulation, and USB CDC-class host communication. IC Role / Device Role / Timing Role: Host-side USB device controller managing CDC ACM class; timers X/Y generate precise symbol clocks for analog front-end control. Use Value: Dual 16-bit timers provide jitter-free 8 kHz sampling synchronization; built-in UARTs support AT command parsing and diagnostic logging. |
Use Scenario: USB-connected MIDI/audio interface converting USB-MIDI messages to serial UART output and controlling LED indicators and push-button inputs. IC Role / Device Role / Timing Role: USB device endpoint manager with key-input interrupt (INT0/INT1) for button wake-up; P4 port configured for LED drive and switch sensing. Use Value: Software pull-up resistors eliminate external components for button interfaces; 66 I/O ports allow direct LED/switch matrix without GPIO expanders. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F566TEADFP | 32-bit RX66T core, 128 KB flash, 20 KB RAM, USB 2.0 FS, no built-in crystal oscillator for USB | Higher performance motor control; lacks integrated 48 MHz sub-clock for USB SOF | Select when needing >20 MIPS throughput or FOC motor algorithms; requires external USB clock source |
| HD64F3687FPV | 16-bit H8/300H core, 128 KB flash, 8 KB RAM, USB 1.1, same 80P6N-A package but no DMAC | Legacy industrial H8 ecosystem; no DMA engine limits high-bandwidth peripheral use | Select for H8 toolchain continuity; avoid if USB+ADC+memory transfer concurrency is required |
Compared with R5F566TEADFP and HD64F3687FPV, the M37641F8FP#U0 uniquely combines USB 1.1 compliance with integrated 48 MHz sub-clock, software-controllable flash rewrite, and dual-voltage operation - making it optimal for cost-sensitive, space-constrained PC peripheral designs requiring field firmware updates.
Availability
M37641F8FP#U0 is available at Aetrix Electronics and suitable for printer controllers, scanner interface modules, modem data pumps, audio peripheral hubs, and USB-to-serial bridge designs requiring stable component supply across extended production lifecycles.
Supply support for M37641F8FP#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 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 7641 Group - including M37641F8FP#U0 - was designed specifically for USB-enabled PC peripheral devices such as printers, scanners, and modems, emphasizing integrated connectivity, flash reprogrammability, and dual-voltage flexibility.
FAQ
What is the maximum operating frequency of the M37641F8FP#U0?
The M37641F8FP#U0 supports a maximum oscillation frequency of 24 MHz, yielding a minimum instruction execution time of 83 ns. This frequency is achieved using an external crystal or ceramic resonator connected between XIN and XOUT pins. The internal clock φ is derived as f(XIN)/2, enabling 12 MHz or 6 MHz system clock configurations depending on voltage mode.
Does the M37641F8FP#U0 support in-system programming (ISP)?
Yes, the M37641F8FP#U0 supports in-system programming via its flash memory mode, which allows byte-level programming and block/batch erasing using software commands. It provides six dedicated flash control commands and guarantees 100 program/erase cycles. Programming voltage (VPP) is supplied internally from VCC - no external high-voltage source is required.
Can the M37641F8FP#U0 operate at 3.3 V while maintaining USB functionality?
Yes - the M37641F8FP#U0 operates at 3.00–3.60 V for 6 MHz φ mode and retains full USB 1.1 functionality. However, the built-in DC-DC converter for USB line driver biasing is disabled at 3.3 V; external 3.3 V must be supplied to the CNVSS pin. USB D+/D− signaling remains compliant with 3.3 V logic levels and requires standard 27–33 Ω series termination.
How many interrupt sources does the M37641F8FP#U0 support, and are they individually vectored?
The M37641F8FP#U0 supports 24 interrupt sources - 5 external (including key input), 18 internal, and 1 software - each with a dedicated vector address. This enables zero-cycle interrupt latency for time-critical tasks like USB SOF handling or key wake-up. Interrupt priority is fixed by vector address, and the I flag in the processor status register controls global enable/disable.
Is the M37641F8FP#U0 pin-compatible with the mask ROM version M37641M8FP?
Yes - the M37641F8FP#U0 is pin-compatible with the M37641M8FP mask ROM variant, sharing identical 80P6N-A packaging, pin configuration, and electrical characteristics. Key differences include RAM size (2.5 KB vs. 1 KB), flash rewrite capability, and reserved ROM area usability - all transparent at the hardware level and requiring only firmware adaptation.
M37641F8FP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 80-BQFP
- Series:
- 740/7600
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 7600
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- SIO, UART/USART, USB
- Peripherals:
- DMA, POR
- Number of I/O:
- 66
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.25V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
M37641F8FP#U0 FAQ
1.How can I place an order for M37641F8FP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for M37641F8FP#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 M37641F8FP#U0 reliable?
The price and inventory of M37641F8FP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M37641F8FP#U0 is usually 5 days.
3.What payment methods are accepted for M37641F8FP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M37641F8FP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M37641F8FP#U0?
M37641F8FP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M37641F8FP#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 M37641F8FP#U0?
For technical support, including M37641F8FP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M37641F8FP#U0 requirements.
6.How does Aetrix verify that M37641F8FP#U0 is sourced from the original manufacturer or authorized distributors?
All M37641F8FP#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 M37641F8FP#U0 meets industry standards.
7.What is the process for return or replacement of M37641F8FP#U0?
All M37641F8FP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M37641F8FP#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 M37641F8FP#U0 part is unused and in its original packaging.
Return procedure for M37641F8FP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M37641F8FP#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…
