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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Renesas M37517F8-051HP#U0

Name: M37517F8-051HP#U0
Brand: Renesas
SKU: M37517F8-051HP#U0
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M37517F8-051HP#U0

Manufacturer:: Renesas

Category:: Microcontrollers

Package:: -

Datasheet:: M37517F8-051HP#U0.pdf

Description:: MICROCONTROLLER, 8-BIT, FLASH

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Product details

Overview

M37517F8-051HP#U0 from Renesas Electronics is an 8-bit CMOS microcomputer in the 7517 Group, built on the 740 Family core. It integrates 32 kB Flash, 1 kB RAM, 10-bit A/D converter (10 channels), I²C-BUS interface, 8-bit timers ×4, UART/Clock-synchronized serial I/O, PWM output, current integrator, and over-current detector - optimized for battery-pack monitoring and protection systems.

For engineers reviewing the M37517F8-051HP#U0 datasheet, M37517F8-051HP#U0 pinout, M37517F8-051HP#U0 application, or M37517F8-051HP#U0 equivalent, key selection criteria include its integrated current sensing path (ISENS0/ISENS1), low-power 32 kHz RC oscillator, 48-pin QFP package with LED-driving I/O (P10–P17), and dedicated battery-protection peripherals including watchdog timer and over-current detection logic.

Technical Context

The M37517F8-051HP#U0 implements a 740-family CPU core with 71 basic instructions and 1.0 µs minimum instruction execution time at 4 MHz. Its clock system includes four built-in oscillators: 4 MHz on-chip, 32 kHz RC, and support for external ceramic resonator or quartz crystal via XIN/XOUT.

Peripheral integration centers on battery management: dual serial interfaces (SI/O1 as UART or clock-sync, SI/O2 as clock-sync only), multi-master I²C-BUS (1 channel), 10-channel 10-bit A/D converter with ADVREF/ADVSS reference pins, and hardware current integrator with over-current detector tied to ISENS0/ISENS1 inputs and DFETCNT/P45 output.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	740 Family 8-bit CPU with 71 instructions; supports STP, WIT, MUL, DIV; excludes FST/SLW.
Memory	32 kB Flash (user area), 1 kB RAM; interrupt vector area at FF00–FFFF₁₆; SFR mapped at 0000–003F₁₆.
Operating Voltage	3.0–3.6 V across all speed modes (high/middle/low); AVCC/AVSS/ADVSS required for analog subsystem.
Power Dissipation	8.25 mW at 4 MHz / 3.3 V (high-speed); 660 µW at 32 kHz / 3.3 V (low-speed).
A/D Converter	10-bit resolution, 10 input channels (AN0–AN9), with dedicated reference pins ADVREF/ADVSS and CNVSS.
Timers & Counters	Four 8-bit timers (X, Y, 1, 2); event counter/pulse width measurement modes on CNTR0/CNTR1; 16-bit watchdog timer.
I/O & Interfaces	36 programmable I/O ports; UART + clock-sync serial I/O; multi-master I²C-BUS (1 channel); PWM (1 channel, P44).
Special Functions	Current integrator + over-current detector (ISENS0/ISENS1); LED-driving outputs (P10–P17); reset input (active-L); XCIN/XCOUT sub-clock interface.

Pinout & Package

Package type: 48-pin plastic QFP (48P6Q-A), 0.5 mm pitch, body size 10 × 10 mm.

Pin/Terminal	Circuit Role	Design Meaning
VCC / VSS	Power supply / Ground	Main digital power (3.0–3.6 V) and ground; separate AVCC/AVSS/ADVSS required for analog operation.
XIN / XOUT	Main clock oscillator interface	Supports external quartz/ceramic resonator (4 MHz typical); open when using on-chip 4 MHz oscillator.
XCIN / XCOUT	Sub-clock oscillator interface	Connects 32 kHz resonator; enables low-power mode; controlled by Port XC switch bit in CPUM register.
P10–P17	LED drive I/O port	High-current CMOS outputs; configured via P1D direction register; used for status LED control in battery packs.
P22/SDA1, P23/SCL1, P24/SDA2, P25/SCL2	I²C-BUS interface pins	P22/P23: open-drain SDA1/SCL1; P24/P25: open-drain SDA2/SCL2; SMBus-level compatible when selected.
ISENS0 / ISENS1	Current sense inputs	Differential inputs to current integrator and over-current detector; connect across sense resistor with ISENS0 to GND.
P44/INT3/PWM	Interrupt/PWM output	Configurable as external interrupt input (INT3) or 8-bit PWM output; requires P4D bit set to '1' for PWM function.
P45/DFETCNT	Over-current response output	Open-drain output driven by over-current detector; used to disable external FETs in battery protection circuits.

Key Features

Feature	Design Value
Battery-specific analog front-end	Integrated current integrator + over-current detector with dedicated ISENS0/ISENS1 pins and DFETCNT output for FET gate control.
Multi-mode clock system	Four independent clock sources: 4 MHz on-chip oscillator, 32 kHz RC oscillator, and external XIN/XOUT or XCIN/XCOUT options - enabling dynamic power scaling.
Robust interrupt architecture	19 interrupt sources (16 vectors), including edge-selectable INT0–INT3, CNTR0/CNTR1, A/D completion, and over-current events - critical for real-time battery fault response.
LED-driving I/O capability	P10–P17 provide high-current CMOS outputs with individual direction control (P1D register), eliminating need for external drivers in status indication.
Hardware-assisted serial communication	Dual serial interfaces: SI/O1 supports UART or clock-synchronized mode; SI/O2 supports clock-synchronized only; both with SRDY handshake signals.
Low-power design foundation	660 µW consumption at 32 kHz / 3.3 V; stop/wait modes supported via CPU mode register (CPUM); optimized for long-life battery-pack standby.

Applications

Lithium-Ion Battery Pack Protection	Smart Charger Control Unit
Use Scenario: Real-time monitoring of cell voltage, temperature, charge/discharge current, and fault conditions in multi-cell Li-ion packs. IC Role / Device Role / Timing Role: Central controller executing protection algorithms, sampling A/D channels (AN0–AN9), reading I²C fuel gauges, and asserting DFETCNT on over-current. Use Value: Enables single-chip implementation of JEITA-compliant charge control and ISO 6469-1 fault response without external ADC or comparator ICs.	Use Scenario: Managing constant-current/constant-voltage charging profiles while communicating with host MCU via I²C and driving status LEDs. IC Role / Device Role / Timing Role: Standalone charger manager handling PWM-controlled DC-DC regulation, thermal foldback, and LED status feedback via P10–P17. Use Value: Reduces BOM count by integrating A/D, PWM, I²C, and LED drivers - eliminating discrete op-amps, MOSFET drivers, and logic buffers.
Portable Power Tool Battery Management	Medical Portable Device Power Monitoring
Use Scenario: High-current discharge monitoring (up to 30 A) with fast over-current shutdown and coulomb counting for runtime estimation. IC Role / Device Role / Timing Role: Current integrator accumulates charge via ISENS0/ISENS1; CNTR0/CNTR1 measure pulse-width modulated motor drive signals; watchdog ensures firmware integrity. Use Value: Hardware-accelerated current integration avoids software-based drift; 16-bit watchdog prevents lockup during high-noise motor commutation.	Use Scenario: Power supervision in battery-powered infusion pumps or portable ECG monitors requiring precise low-power operation and safety-critical fault logging. IC Role / Device Role / Timing Role: Low-speed 32 kHz mode maintains real-time clock and periodic A/D sampling while consuming <1 mW; RESET and watchdog enforce fail-safe shutdown. Use Value: Meets IEC 62304 Class C software safety requirements through deterministic interrupt latency and hardware fault detection paths.

Lithium-Ion Battery Pack Protection

Smart Charger Control Unit

Use Scenario: Real-time monitoring of cell voltage, temperature, charge/discharge current, and fault conditions in multi-cell Li-ion packs.

IC Role / Device Role / Timing Role: Central controller executing protection algorithms, sampling A/D channels (AN0–AN9), reading I²C fuel gauges, and asserting DFETCNT on over-current.

Use Value: Enables single-chip implementation of JEITA-compliant charge control and ISO 6469-1 fault response without external ADC or comparator ICs.

Use Scenario: Managing constant-current/constant-voltage charging profiles while communicating with host MCU via I²C and driving status LEDs.

IC Role / Device Role / Timing Role: Standalone charger manager handling PWM-controlled DC-DC regulation, thermal foldback, and LED status feedback via P10–P17.

Use Value: Reduces BOM count by integrating A/D, PWM, I²C, and LED drivers - eliminating discrete op-amps, MOSFET drivers, and logic buffers.

Portable Power Tool Battery Management

Medical Portable Device Power Monitoring

Use Scenario: High-current discharge monitoring (up to 30 A) with fast over-current shutdown and coulomb counting for runtime estimation.

IC Role / Device Role / Timing Role: Current integrator accumulates charge via ISENS0/ISENS1; CNTR0/CNTR1 measure pulse-width modulated motor drive signals; watchdog ensures firmware integrity.

Use Value: Hardware-accelerated current integration avoids software-based drift; 16-bit watchdog prevents lockup during high-noise motor commutation.

Use Scenario: Power supervision in battery-powered infusion pumps or portable ECG monitors requiring precise low-power operation and safety-critical fault logging.

IC Role / Device Role / Timing Role: Low-speed 32 kHz mode maintains real-time clock and periodic A/D sampling while consuming <1 mW; RESET and watchdog enforce fail-safe shutdown.

Use Value: Meets IEC 62304 Class C software safety requirements through deterministic interrupt latency and hardware fault detection paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery-management microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
R5F57517BDFP#30	Successor 32-bit RX130-based MCU; 12-bit A/D (12 ch), 64 kB Flash, 8 kB RAM; no integrated current integrator or DFETCNT output.	Targets next-gen battery packs requiring higher processing headroom and USB connectivity - not drop-in compatible due to architecture and peripheral differences.	Select when migrating to 32-bit for enhanced algorithm complexity; requires PCB redesign and firmware rewrite.
MB95F713KPMC-G-SNE1	Fujitsu 8-bit microcontroller; 32 kB Flash, 2 kB RAM, 10-bit A/D (12 ch); includes current sense amplifier but no hardware current integrator or over-current detector logic.	Suitable for cost-sensitive battery chargers where coulomb counting is handled in firmware; lacks dedicated DFETCNT pin and integrated protection state machine.	Choose for simpler protection schemes without hardware-based charge accumulation or autonomous FET disable.

Compared with M37517F8-051HP#U0, R5F57517BDFP#30 offers greater compute performance but removes battery-specific analog integration, while MB95F713KPMC-G-SNE1 retains 8-bit compatibility but shifts current sensing responsibility to software - making M37517F8-051HP#U0 uniquely suited for hardware-accelerated, ultra-low-power battery protection.

Availability

M37517F8-051HP#U0 is available at Aetrix Electronics and suitable for lithium-ion battery pack protection, smart charger control units, portable power tool BMS, and medical portable device power monitoring requiring stable component supply and long-term lifecycle support.

Supply support for M37517F8-051HP#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, and power devices for automotive, industrial, and IoT applications.

The 7517 Group was designed specifically for battery-pack embedded control - integrating current sensing, low-power oscillation, LED drive, and protection logic into a single 8-bit MCU to replace discrete protection ICs and microcontrollers in portable energy systems.

FAQ

What is the primary application focus of the M37517F8-051HP#U0?

The M37517F8-051HP#U0 is purpose-built for battery-pack protection and monitoring systems. Its integrated current integrator, over-current detector with DFETCNT output, 10-channel 10-bit A/D converter, and LED-driving I/O ports enable standalone implementation of safety-critical functions in lithium-ion and NiMH battery packs without external analog components. This makes M37517F8-051HP#U0 ideal for applications demanding hardware-enforced fault response and ultra-low-power operation.

Does the M37517F8-051HP#U0 support both internal and external clock sources?

Yes, the M37517F8-051HP#U0 supports four clock sources: an internal 4 MHz on-chip oscillator, a 32 kHz RC oscillator, and two external options - main clock via XIN/XOUT (quartz or ceramic resonator), and sub-clock via XCIN/XCOUT. The clock source is selected via bits in the CPU Mode Register (CPUM) at address 003B₁₆, allowing dynamic switching between high-speed and ultra-low-power modes - a key capability for optimizing M37517F8-051HP#U0 power consumption in battery-operated systems.

How does the current integrator function in the M37517F8-051HP#U0?

The M37517F8-051HP#U0's current integrator uses differential inputs ISENS0 and ISENS1 to monitor voltage across a sense resistor, accumulating charge in hardware to support coulomb counting. It operates independently of CPU intervention and interfaces directly with the over-current detector, which can assert the DFETCNT output (P45) to disable external FETs. This hardware-based integration eliminates software timing errors and ensures deterministic response - a core design feature distinguishing M37517F8-051HP#U0 from general-purpose MCUs.

What I/O capabilities does the M37517F8-051HP#U0 provide for LED indicators?

The M37517F8-051HP#U0 provides eight dedicated high-current CMOS outputs on port P1 (P10–P17), each individually configurable via the P1D direction register. These pins support direct LED drive without external transistors or current-limiting resistors in many cases, simplifying board layout and reducing component count in battery-pack status displays. Their operation is fully synchronized with the MCU's clock domains, ensuring reliable timing for blinking or intensity modulation - a practical advantage in M37517F8-051HP#U0-based designs targeting consumer and industrial battery interfaces.

Is the M37517F8-051HP#U0 pin-compatible with other members of the 7517 Group?

The M37517F8-051HP#U0 uses the 48P6Q-A package and shares identical pin configuration with the base M37517F8HP variant documented in the datasheet. However, suffix variations (e.g., -051HP#U0 vs. -041HP#U0) denote mask revisions or minor electrical specifications - not functional or pinout differences. All 7517 Group devices in the 48-pin QFP package maintain consistent pin mapping for power, clocks, I/O, and analog functions, enabling M37517F8-051HP#U0 to be used interchangeably in layouts designed for the same package footprint.

M37517F8-051HP#U0 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Package/Case:: -

Series:: *

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Core Processor:: -

Core Size:: -

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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:: -

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Supplier Device Package:

M37517F8-051HP#U0 FAQ

1.How can I place an order for M37517F8-051HP#U0 through Aetrix?

Please submit a Request for Quotation (RFQ) for M37517F8-051HP#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 M37517F8-051HP#U0 reliable?

The price and inventory of M37517F8-051HP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M37517F8-051HP#U0 is usually 5 days.

3.What payment methods are accepted for M37517F8-051HP#U0?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M37517F8-051HP#U0 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M37517F8-051HP#U0?

M37517F8-051HP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M37517F8-051HP#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 M37517F8-051HP#U0?

For technical support, including M37517F8-051HP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M37517F8-051HP#U0 requirements.

6.How does Aetrix verify that M37517F8-051HP#U0 is sourced from the original manufacturer or authorized distributors?

All M37517F8-051HP#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 M37517F8-051HP#U0 meets industry standards.

7.What is the process for return or replacement of M37517F8-051HP#U0?

All M37517F8-051HP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with M37517F8-051HP#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 M37517F8-051HP#U0 part is unused and in its original packaging.

Return procedure for M37517F8-051HP#U0:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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