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

Renesas UPD166108GR-E1-AY

Name: UPD166108GR-E1-AY
Brand: Renesas
SKU: UPD166108GR-E1-AY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UPD166108GR-E1-AY

Manufacturer:: Renesas

Category:: Microcontrollers

Package:: -

Datasheet:: UPD166108GR-E1-AY.pdf

Description:: IC MCU

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Product details

Overview

UPD166108GR-E1-AY from Renesas Electronics is a dual-channel N-channel low-side power switch IC with integrated overcurrent and overtemperature protection, 200 mΩ max R_DS(ON) at 5 V input and 0.9 A load, 175°C channel temperature rating, and self-diagnostic DIAG outputs - used for robust 14 V DC grounded load switching in automotive body electronics.

For engineers reviewing the UPD166108GR-E1-AY datasheet, UPD166108GR-E1-AY pinout, UPD166108GR-E1-AY application, or UPD166108GR-E1-AY equivalent, this page delivers verified functional specifications, validated dual-channel protection behavior, Power SOP-8 package integration details, and real-world load-switching design context - not generic driver summaries.

Technical Context

The UPD166108GR-E1-AY implements two independent N-channel MOSFET drivers with charge-pump gate drive, dynamic clamp circuitry for inductive load flyback suppression (E_AS = 100 mJ/ch), and autonomous thermal shutdown at 175°C with automatic recovery. Each channel features dedicated high-level active input (IN1/IN2) and open-drain diagnostic output (DIAG1/DIAG2).

Protection logic includes current limiting (1–20 A range depending on temperature and supply), overtemperature detection with hysteresis, and open-load detection requiring external 10 kΩ pull-up. Switching times are tightly controlled: t_on/t_off ≤ 100 µs, t_r/t_f ≤ 60 µs under 18 V V_BAT, 22 Ω load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
R_DS(ON) max	200 mΩ per channel at 5 V input, 0.9 A, 25°C - enables low conduction loss in 14 V automotive loads
Channel temp. max	175°C - supports operation in engine bay or under-hood environments without derating
Output voltage max	40 V - withstands load-dump transients up to ISO 7637-2 Pulse 5a
Diagnostic response	50 µs DIAG assertion - allows fast fault isolation in safety-critical control loops
Dynamic clamp E_AS	100 mJ per channel (VBAT=16 V, L=50 mH) - suppresses flyback energy without external diodes
Input logic threshold	VIH ≥ 3.0 V, VIL ≤ 1.5 V - compatible with 3.3 V and 5 V microcontroller GPIOs
Continuous output current	1.6 A per channel DC - sustains steady-state solenoid, lamp, or relay loads

Pinout & Package

UPD166108GR-E1-AY uses the Power SOP-8 surface-mount package with exposed thermal pad (pin 5 and pin 7 are GND terminals for enhanced heat dissipation and noise immunity).

Pin/Terminal	Circuit Role	Design Meaning
1 (IN1)	Channel 1 input control	Active-high logic input; drives internal charge pump to turn on N-ch MOSFET
2 (DIAG1)	Channel 1 diagnostic output	Open-drain signal: low during normal operation, high during overtemp/overcurrent
3 (IN2)	Channel 2 input control	Independent active-high input for second load switch
4 (DIAG2)	Channel 2 diagnostic output	Open-drain fault indicator mirroring DIAG1 behavior per channel
5 (GND2)	Ground terminal 2	Dedicated ground return path for Channel 2; improves current sensing accuracy
6 (OUT2)	Channel 2 output	N-channel drain output; connects to load cathode (grounded load configuration)
7 (GND1)	Ground terminal 1	Dedicated ground return path for Channel 1; enables independent ground routing
8 (OUT1)	Channel 1 output	N-channel drain output; switches 14 V DC grounded loads such as fuel pumps or HVAC actuators

Key Features

Feature	Design Value
Dual independent low-side switches	Two fully isolated channels with separate IN/DIAG/GND/OUT pins - eliminates crosstalk in multi-load systems
Integrated dynamic clamp	On-chip clamp absorbs inductive kickback (up to 100 mJ) - removes need for external flyback diodes
Self-recovering thermal protection	Shuts down at 175°C channel temperature and auto-restarts when cooled - prevents latch-up in overheated conditions
Open-load detection	Identifies disconnected loads via DIAG pin high-Z state when IN is low and external 10 kΩ pull-up applied - supports diagnostics without extra ICs
Robust fault signaling	Dedicated DIAG pins report overcurrent, overtemperature, and open-load faults with <50 µs latency - enables real-time ECU response

Applications

Automotive Body Control	Industrial Actuator Control
Use Scenario: Driving door lock actuators, seat motor relays, and interior lighting in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Dual low-side switch providing PWM-capable load control with integrated diagnostics for ASIL-B–compatible modules. Use Value: Eliminates discrete protection components while delivering 1.6 A/channel continuous drive and real-time fault reporting to MCU via DIAG pins.	Use Scenario: Controlling solenoid valves and pneumatic cylinders in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: High-reliability load interface with built-in current limiting and thermal recovery - reduces system-level watchdog complexity. Use Value: Withstands 40 V transients and dissipates heat via Power SOP-8 thermal pad, enabling compact DIN-rail mount designs without heatsinks.
Truck Lighting Systems	Off-Highway Equipment
Use Scenario: Switching LED headlamps and fog lamps in commercial vehicles subject to wide ambient temperature swings (-40°C to +125°C). IC Role / Device Role / Timing Role: Low-R_DS(ON) N-ch driver ensuring minimal voltage drop across lamp circuits during long-duration ON states. Use Value: 200 mΩ R_DS(ON) at 25°C (≤490 mΩ at 175°C) maintains efficiency and reduces thermal stress in sealed lamp housings.	Use Scenario: Managing hydraulic pump motors and sensor power rails in agricultural machinery operating in dusty, high-vibration environments. IC Role / Device Role / Timing Role: Fault-tolerant power switch with open-load detection - verifies actuator connectivity before enabling motion sequences. Use Value: DIAG-driven open-load detection (with 10 kΩ pull-up) confirms wiring integrity prior to motor start, preventing false activation in field-deployed equipment.

Automotive Body Control

Industrial Actuator Control

Use Scenario: Driving door lock actuators, seat motor relays, and interior lighting in 12 V vehicle architectures.

IC Role / Device Role / Timing Role: Dual low-side switch providing PWM-capable load control with integrated diagnostics for ASIL-B–compatible modules.

Use Value: Eliminates discrete protection components while delivering 1.6 A/channel continuous drive and real-time fault reporting to MCU via DIAG pins.

Use Scenario: Controlling solenoid valves and pneumatic cylinders in factory automation PLC I/O modules.

IC Role / Device Role / Timing Role: High-reliability load interface with built-in current limiting and thermal recovery - reduces system-level watchdog complexity.

Use Value: Withstands 40 V transients and dissipates heat via Power SOP-8 thermal pad, enabling compact DIN-rail mount designs without heatsinks.

Truck Lighting Systems

Off-Highway Equipment

Use Scenario: Switching LED headlamps and fog lamps in commercial vehicles subject to wide ambient temperature swings (-40°C to +125°C).

IC Role / Device Role / Timing Role: Low-R_DS(ON) N-ch driver ensuring minimal voltage drop across lamp circuits during long-duration ON states.

Use Value: 200 mΩ R_DS(ON) at 25°C (≤490 mΩ at 175°C) maintains efficiency and reduces thermal stress in sealed lamp housings.

Use Scenario: Managing hydraulic pump motors and sensor power rails in agricultural machinery operating in dusty, high-vibration environments.

IC Role / Device Role / Timing Role: Fault-tolerant power switch with open-load detection - verifies actuator connectivity before enabling motion sequences.

Use Value: DIAG-driven open-load detection (with 10 kΩ pull-up) confirms wiring integrity prior to motor start, preventing false activation in field-deployed equipment.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS4H160-Q1	Single-channel, higher R_DS(ON) (350 mΩ), integrated current sense, no dynamic clamp	Requires external flyback protection; suited for current-monitoring–centric designs	Choose when precise load current feedback is prioritized over dual-channel integration
VNQ7E100AJTR	Dual-channel, lower R_DS(ON) (100 mΩ), higher current rating (4.5 A), no open-load detection	Lacks open-load diagnostics; requires external circuitry for disconnection verification	Prefer when higher continuous current and lower conduction loss outweigh diagnostic completeness

Compared with TPS4H160-Q1 and VNQ7E100AJTR, the UPD166108GR-E1-AY uniquely combines dual-channel operation, on-die dynamic clamping, and open-load detection in a single Power SOP-8 package - making it optimal for space-constrained automotive modules needing comprehensive fault coverage without added BOM cost.

Availability

UPD166108GR-E1-AY is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC output stages, and off-highway equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant Pb-free packaging.

Supply support for UPD166108GR-E1-AY 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

The µPD166100 series - including UPD166108GR-E1-AY - was designed specifically for automotive-grade low-side switching with embedded protection, targeting body electronics, chassis systems, and power distribution modules where reliability and diagnostic capability are critical.

FAQ

What is the maximum continuous output current per channel for UPD166108GR-E1-AY?

The UPD166108GR-E1-AY supports 1.6 A DC per channel under standard conditions (VIN = 5 V, Tch ≤ 125°C). At elevated channel temperatures up to 175°C, the device limits current to 1.6 A minimum but may reduce further based on thermal conditions - full derating curves are provided in the R07DS1119EJ0100 datasheet Figure 12.

Does UPD166108GR-E1-AY require an external flyback diode when driving inductive loads?

No. The UPD166108GR-E1-AY integrates a dynamic clamp circuit rated for 100 mJ per channel (VBAT = 16 V, L = 50 mH), eliminating the need for external flyback diodes in typical automotive solenoid or relay applications - confirmed in Absolute Maximum Ratings and Block Diagram sections of the datasheet.

How does the open-load detection function work on UPD166108GR-E1-AY?

UPD166108GR-E1-AY detects open-load by monitoring output voltage when IN is low: with a 10 kΩ pull-up resistor on OUT, the DIAG pin goes high-impedance (pull-up high) if the load is disconnected. This behavior is defined in the Truth Table and Outline of Functions (Page 5–6) of the R07DS1119EJ0100 datasheet.

What is the thermal shutdown recovery behavior of UPD166108GR-E1-AY?

The UPD166108GR-E1-AY features self-recovering thermal shutdown: it disables output at 175°C channel temperature and automatically resumes operation once the junction cools below the hysteresis threshold - explicitly noted as "Thermal shutdown returns by oneself" in the Electrical Characteristics table footnote *2 of the datasheet.

Is UPD166108GR-E1-AY pin-compatible with other variants in the µPD166108 family?

Yes. UPD166108GR-E1-AY shares identical Power SOP-8 pinout and functionality with UPD166108GR-E2-AY; only tape orientation differs per the Ordering Information table on Page 1 - both variants use the same die, electrical specs, and pin functions as confirmed in the Pin Configuration and Pin Functions sections.

UPD166108GR-E1-AY Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Package/Case:: -

Series:: -

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

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Peripherals:: -

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Voltage - Supply (Vcc/Vdd):: -

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UPD166108GR-E1-AY FAQ

1.How can I place an order for UPD166108GR-E1-AY through Aetrix?

Please submit a Request for Quotation (RFQ) for UPD166108GR-E1-AY 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 UPD166108GR-E1-AY reliable?

The price and inventory of UPD166108GR-E1-AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD166108GR-E1-AY is usually 5 days.

3.What payment methods are accepted for UPD166108GR-E1-AY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD166108GR-E1-AY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UPD166108GR-E1-AY?

UPD166108GR-E1-AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UPD166108GR-E1-AY 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 UPD166108GR-E1-AY?

For technical support, including UPD166108GR-E1-AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD166108GR-E1-AY requirements.

6.How does Aetrix verify that UPD166108GR-E1-AY is sourced from the original manufacturer or authorized distributors?

All UPD166108GR-E1-AY 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 UPD166108GR-E1-AY meets industry standards.

7.What is the process for return or replacement of UPD166108GR-E1-AY?

All UPD166108GR-E1-AY units undergo pre-shipment inspection (PSI). If there is an issue with UPD166108GR-E1-AY, 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 UPD166108GR-E1-AY part is unused and in its original packaging.

Return procedure for UPD166108GR-E1-AY:

1.Submit a request within 90 days.

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

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