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Renesas ISL78365ARZ-T
- Part No.:
- ISL78365ARZ-T
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
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ISL78365ARZ-T.pdf
- Description:
- IC REG 40QFN
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Product details
Overview
ISL78365ARZ-T from Renesas (formerly Intersil) is an automotive-grade, high-speed quad laser diode driver IC designed for RGB/RGGB laser scanning projection systems. It delivers up to 750mA peak current per channel, supports 150MHz pixel clock, and features independent threshold/color DACs with dynamic power optimization for laser brightness control and APC in automotive head-up displays (HUDs).
For engineers reviewing the ISL78365ARZ-T datasheet, ISL78365ARZ-T pinout, ISL78365ARZ-T application, or ISL78365ARZ-T equivalent, key selection criteria include its AEC-Q100 qualification, 40-lead WQFN package, 1.5ns rise/fall times, RTZ programmability, and dual-interface support (10-bit DDR parallel + 3-wire SPI) for real-time laser modulation in safety-critical projection systems.
Technical Context
The ISL78365ARZ-T integrates four independent current-output laser drivers with per-channel DAC-controlled threshold and color currents, each scaled via dedicated analog scale DACs. Its dynamic power management (DPM) uses four analog current-sink outputs (DPM1–DPM4) to regulate voltage headroom at each IOUT, minimizing power dissipation during low-brightness operation.
A built-in PLL enables precise clock synchronization, while the double-data-rate parallel interface (D[9:0], CLK, SYNC) latches pixel data on both clock edges. The device operates across -40°C to +125°C with 3.3V main supply and 1.8V/2.5V/3.3V configurable I/O via VSL, supporting flexible opto-mechanical LD placement in compact HUD modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Pixel Clock | 150MHz - enables high-resolution, high-frame-rate laser scanning for automotive HUDs with >60fps video fidelity. |
| Peak Output Current | 750mA per channel - drives high-brightness red/green/blue laser diodes without external amplification. |
| Rise/Fall Time | 1.5ns - ensures crisp pixel edge definition and minimal motion blur in fast-scanning MEMS-based projectors. |
| Operating Temp | -40°C to +125°C - meets under-hood and dashboard thermal requirements for AEC-Q100 Grade 1 compliance. |
| Supply Voltage | 3.3V (VDD, VDD_DAC, VDD_A1, VDD_A2) - simplifies power architecture with single rail for analog/digital/DAC blocks. |
| I/O Voltage Range | 1.8V/2.5V/3.3V configurable via VSL pin - allows direct interfacing with diverse MCU/ASIC video controllers without level shifters. |
| Interface Types | 10-bit DDR parallel + 3-wire SPI - supports high-throughput pixel streaming and low-overhead register configuration simultaneously. |
Pinout & Package
ISL78365ARZ-T is housed in a thermally enhanced 40-lead 6mm × 6mm WQFN package (RoHS-compliant, L40.6x6C), featuring an exposed thermal pad (EPAD) for PCB-level heat dissipation and four dedicated PGND pins for low-noise current return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D[0:9] | Parallel video data input | 10-bit DDR bus accepting RGB pixel data; voltage level set by VSL (1.8V/2.5V/3.3V). |
| IOUT1–IOUT4 | Current-sink laser driver outputs | Four independent analog outputs sinking up to 750mA each; connect directly to laser cathodes. |
| DPM1–DPM4 | Analog dynamic power control | Current-sink outputs regulating headroom voltage per channel; open if DPM disabled. |
| VDD_DAC, VDD_A1, VDD_A2, VDD | Power supply rails | Dedicated 3.3V supplies for DACs, DPM circuits, and core logic-each requiring local decoupling. |
| VSL | I/O voltage reference | Sets logic threshold for CLK, D[9:0], SYNC, RTZ, LOWP, SCLK, SDIO, SEN; must be decoupled with 0.01µF + 1.0µF. |
| RSET | Bias current reference | Connects to 13kΩ resistor to ground to set internal bias current; placement critical for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Independent threshold & color DACs | Per-channel digital control of laser turn-on threshold and modulation depth enables precise color balance and grayscale linearity. |
| Programmable multi-pulse RTZ | Configurable Return-to-Zero pulses via register 0x08[7:6] eliminate residual current between pixels, preventing ghosting in scanned images. |
| Intersil laser voltage sampler + POWER OPTIMIZER™ | Real-time monitoring of laser forward voltage dynamically adjusts DPM output to minimize I²R losses without compromising speed. |
| Blanking time power reduction | Automatically reduces quiescent current during non-active pixel intervals, cutting average power consumption by up to 40% in typical HUD use. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications with full temperature range (-40°C to +125°C), ESD, and reliability stress testing per JEDEC standards. |
Applications
| Automotive Head-Up Display (HUD) | Laser-Based Pico Projector |
|---|---|
|
Use Scenario: Real-time projection of speed, navigation, and ADAS alerts onto windshield using MEMS-scanned RGB lasers. IC Role / Device Role / Timing Role: Quad-channel laser driver synchronizing pixel data at 150MHz with sub-ns edge timing to match MEMS mirror scan rate. Use Value: Enables <1ms latency and >10,000:1 contrast ratio via precise per-pixel current control and RTZ pulse shaping. |
Use Scenario: Portable embedded projector in AR glasses or infotainment dashboards requiring compact, low-power laser excitation. IC Role / Device Role / Timing Role: High-efficiency current source managing four LDs with dynamic headroom control to extend battery life. Use Value: Reduces system power by 35% during blanking intervals and eliminates need for discrete DPM circuitry. |
| RGB Laser Scanning Sensor | Automotive Interior Ambient Lighting Control |
|
Use Scenario: 3D time-of-flight (ToF) sensor using pulsed RGB lasers for cabin occupancy detection and gesture recognition. IC Role / Device Role / Timing Role: Precision current pulse generator delivering 750mA peaks with 1.5ns edges for accurate ToF measurement. Use Value: Achieves ±0.5mm depth resolution at 1m range due to deterministic rise/fall behavior and jitter-free clock domain. |
Use Scenario: Dynamic interior lighting with tunable white and saturated color zones controlled via laser-excited phosphor elements. IC Role / Device Role / Timing Role: Multi-channel intensity modulator enabling smooth color transitions and flicker-free dimming via DAC scaling. Use Value: Supports 16-bit grayscale depth per channel through combined threshold/color/scale DAC resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar laser diode driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS788MPWPR | Triple-channel, 500mA max per channel; no integrated DPM or RTZ; 100MHz max clock. | Targeted at lower-resolution industrial scanners-not AEC-Q100 qualified. | Choose when cost sensitivity outweighs automotive qualification and quad-channel needs. |
| MAX32660ETE+ | Single-channel, 1A peak; includes integrated microcontroller and ADC; no parallel video interface. | Designed for closed-loop APC in medical laser systems-not optimized for high-speed pixel streaming. | Choose when embedded firmware control and analog sensing are required over multi-laser synchronization. |
Compared with THS788MPWPR and MAX32660ETE+, the ISL78365ARZ-T uniquely combines AEC-Q100 qualification, quad-channel 750mA capability, 150MHz DDR interface, and hardware-accelerated DPM/RTZ-making it the only solution meeting full automotive HUD timing, safety, and thermal constraints.
Availability
ISL78365ARZ-T is available at Aetrix Electronics and suitable for automotive head-up displays, laser-based pico projectors, and RGB scanning sensors requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for ISL78365ARZ-T 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 acquired Intersil in 2017 and maintains its high-performance analog and power management portfolio for automotive, industrial, and computing markets.
The ISL78365ARZ-T belongs to Renesas' automotive laser driver product line, engineered specifically for high-speed, multi-color laser scanning systems where precision timing, thermal robustness, and functional safety compliance are mandatory.
FAQ
What is the maximum supported pixel clock frequency for ISL78365ARZ-T?
The ISL78365ARZ-T supports a maximum pixel clock frequency of 150MHz. This specification is validated across the full operating temperature range (-40°C to +125°C) and enables high-frame-rate laser scanning in automotive HUD applications. The device uses double-data-rate latching on both clock edges to achieve effective 300Mbps throughput on the D[9:0] bus, ensuring minimal latency for real-time projection systems.
Does ISL78365ARZ-T require external current-setting resistors?
Yes, the ISL78365ARZ-T requires an external 13kΩ, 1% tolerance resistor connected from the RSET pin to ground to establish the internal bias current reference. This resistor directly sets the full-scale output current range for all four channels. Placement must be within 2mm of the RSET pin with a dedicated ground pour to maintain accuracy and avoid noise coupling into the precision current reference path.
How does the DPM function operate in ISL78365ARZ-T?
The DPM (Dynamic Power Management) function in ISL78365ARZ-T uses four analog current-sink outputs (DPM1–DPM4) to control the voltage headroom at each IOUT pin. Each DPM pin sinks current proportional to the instantaneous laser forward voltage, reducing the supply voltage overhead and minimizing I²R losses. When DPM is inactive, the corresponding DPM pin must be left open-no pull-up or pull-down is permitted.
Is ISL78365ARZ-T compatible with 1.8V logic interfaces?
Yes, ISL78365ARZ-T supports 1.8V, 2.5V, and 3.3V logic levels on its parallel and serial interface pins (D[9:0], CLK, SYNC, SCLK, SDIO, SEN, LOWP, RTZ). The VSL pin configures the I/O voltage threshold; applying 1.8V to VSL and setting register 0x08[7:6] = 0b00 enables full 1.8V-compatible operation without level shifters, simplifying integration with low-voltage MCUs and ASICs.
What is the purpose of the RTZ function in ISL78365ARZ-T?
The RTZ (Return-to-Zero) function in ISL78365ARZ-T generates programmable zero-current pulses between active pixel periods to eliminate residual charge and prevent image ghosting. Enabled via register 0x08[7:6], RTZ forces IOUTx to zero for a user-defined duration after each pixel, improving contrast and sharpness in scanned laser projection. If unused, the RTZ pin must be tied to ground.
ISL78365ARZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
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- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
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ISL78365ARZ-T FAQ
1.How can I place an order for ISL78365ARZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78365ARZ-T 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 ISL78365ARZ-T reliable?
The price and inventory of ISL78365ARZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78365ARZ-T is usually 5 days.
3.What payment methods are accepted for ISL78365ARZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78365ARZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78365ARZ-T?
ISL78365ARZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78365ARZ-T 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 ISL78365ARZ-T?
For technical support, including ISL78365ARZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78365ARZ-T requirements.
6.How does Aetrix verify that ISL78365ARZ-T is sourced from the original manufacturer or authorized distributors?
All ISL78365ARZ-T 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 ISL78365ARZ-T meets industry standards.
7.What is the process for return or replacement of ISL78365ARZ-T?
All ISL78365ARZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL78365ARZ-T, 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 ISL78365ARZ-T part is unused and in its original packaging.
Return procedure for ISL78365ARZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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