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Renesas ISL59446IRZ
- Part No.:
- ISL59446IRZ
- Manufacturer:
- Renesas
- Category:
- Video Amps and Modules
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ISL59446IRZ.pdf
- Description:
- IC AMP MPLEX AMP 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:747
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Product details
Overview
ISL59446IRZ from Intersil is a triple-channel 4:1 video multiplexing amplifier with fixed gain-of-2, 510MHz bandwidth into 150Ω, ±1600V/µs slew rate, and ±5V dual-supply operation. It integrates high-impedance buffered inputs, three-state outputs (HIZ), and power-down mode (ENABLE) for HDTV analog input switching.
For engineers reviewing the ISL59446IRZ datasheet, ISL59446IRZ pinout, ISL59446IRZ application, or ISL59446IRZ equivalent, this page delivers verified specifications, functional pin mapping, real-world video system use cases, and validated alternative options - all grounded in the FN6261 Rev 3.00 datasheet and QFN package documentation.
Technical Context
The ISL59446IRZ implements three independent current-feedback amplifiers, each with internally set gain-of-2 and simultaneous channel selection via binary-coded S0/S1 logic. Its architecture supports high-speed analog switching with <24ns channel-to-channel switching time and <1.3ns small-signal rise/fall times under 150Ω load.
It features active logic-level control of output state (HIZ) and device enable (ENABLE), both with internal pull-down resistors and TTL/CMOS compatibility. The thermal pad is electrically tied to V−, requiring PCB connection to the negative supply rail-not ground-to prevent substrate bias currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 510MHz into 150Ω load - enables full HD/DTV baseband video signal routing without attenuation at critical frequencies. |
| Slew Rate | ±1600V/µs - supports clean transient response for fast-rising video sync pulses and composite signals. |
| Supply Voltage | ±5V (10V total) - compatible with standard dual-rail video signal conditioning rails and avoids level-shifting circuitry. |
| Channel Count | Triple independent 4:1 mux-amplifier channels (A/B/C) - allows parallel switching of RGB, YPbPr, or component video paths. |
| Output Control | Three-state (HIZ) outputs with ~1kΩ impedance in disabled state - enables bus-sharing across multiple ISL59446IRZ devices on shared video lines. |
| Power-Down Current | 3.4mA total (typical) when ENABLE = high - reduces system standby power in set-top boxes and broadcast gear during inactive periods. |
| Differential Gain/Phase | 0.008% / 0.01° - meets broadcast-grade video fidelity requirements for NTSC/PAL signals at 3.58MHz. |
Pinout & Package
ISL59446IRZ uses a 32-lead QFN package (5mm × 6mm, L32.5x6A) with exposed thermal pad internally connected to V−. The pad must be soldered to a PCB copper area tied directly to the V− net - not GND - to avoid reverse-bias current flow through the substrate.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0A–IN3A, IN0B–IN3B, IN0C–IN3C | Analog input terminals (4 per channel) | Three independent sets of four analog inputs (A/B/C), each selectable via S0/S1 for simultaneous RGB/component routing. |
| S0, S1 | Binary channel select inputs (LSB/MSB) | Directly control which of four input pairs (IN0–IN3) drives all three outputs; no propagation delay mismatch between channels. |
| OUTA, OUTB, OUTC | Amplified, gain-of-2 analog outputs | High-drive outputs capable of driving 150Ω coaxial video loads; support 2VP-P swing into 500Ω with <0.2% distortion. |
| ENABLE | Active-low global power-down control | Puts entire IC into 3.4mA low-power state while preserving logic state; recovery time ~200ns. |
| HIZ | Active-high output disable control | Places all three outputs in ~1kΩ high-impedance state; enables multi-device video bus arbitration without external switches. |
| V+, V−, GNDA/GNDB/GNDC | Power and ground distribution | Dual ±5V supplies with dedicated ground pins per amplifier channel minimize crosstalk; thermal pad connects to V−. |
| NIC (Pins 2,4,8,13,15,24,28,30) | No internal connection | Must be tied to ground on PCB to reduce inter-channel coupling; placement adjacent to analog inputs suppresses noise ingress. |
Key Features
| Feature | Design Value |
|---|---|
| 510MHz bandwidth into 150Ω | Supports full-bandwidth SD/HD video (up to 1080i) without filtering or gain peaking compensation. |
| ±1600V/µs slew rate | Preserves edge integrity of horizontal sync pulses and digital video timing signals up to 500MHz. |
| Internally set gain-of-2 | Eliminates external feedback components, reducing BOM count and layout sensitivity in video signal chains. |
| Three-state outputs (HIZ) | Enables direct wire-OR of multiple ISL59446IRZ outputs onto a single video bus-no external analog switches required. |
| Power-down mode (ENABLE) | Reduces quiescent current from 44mA to 3.4mA, cutting thermal load in multi-channel video routers and projectors. |
| High-impedance buffered inputs | 10MΩ input resistance minimizes loading on upstream DACs, scalers, or video processors without external buffers. |
Applications
| HDTV Analog Input Switching | Video Projector Signal Routing |
|---|---|
Use Scenario: Selecting among multiple analog video sources (component, VGA, SCART) before ADC conversion in an HDTV tuner board. IC Role / Device Role / Timing Role: Triple-channel mux-amplifier providing simultaneous RGB path selection with gain-of-2 and DC-coupled output drive. Use Value: Eliminates need for three separate mux ICs and op-amps; maintains <0.01° differential phase error across NTSC/PAL signals. |
Use Scenario: Routing RGBHV signals from different media players to projector's internal scaler and timing controller. IC Role / Device Role / Timing Role: High-fidelity analog switch with 510MHz bandwidth ensures pixel-clock harmonics remain intact up to 165MHz. Use Value: Enables seamless source switching without visible artifacts; HIZ mode prevents bus contention during transition. |
| Computer Monitor Input Multiplexing | Broadcast Video Equipment |
Use Scenario: Supporting dual-input (DVI-analog + VGA) capability in LCD monitor mainboard with automatic source detection. IC Role / Device Role / Timing Role: Simultaneous switching of red/green/blue analog channels with matched propagation delay (<0.55ns) across all three paths. Use Value: Prevents color skew and timing misalignment; ±5V supply matches legacy VGA driver voltage rails. |
Use Scenario: Input stage of a multi-format video router handling SDI-to-analog conversion and format-aware signal selection. IC Role / Device Role / Timing Role: Final-stage analog mux-amplifier before distribution amplifiers or test equipment interfaces. Use Value: 76dB off-isolation and 74dB crosstalk rejection preserve signal integrity in multi-channel broadcast racks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video multiplexing amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8174ARUZ | Quad-channel, 500MHz bandwidth, gain-of-1 only; requires external gain-setting resistors for gain-of-2 operation. | Lacks integrated gain-of-2 and HIZ output; needs additional components for same functionality. | Choose AD8174ARUZ only if quad-channel count outweighs added design complexity and board space. |
| THS7374IPWPR | Triple-channel, 100MHz bandwidth, fixed gain-of-2, but optimized for 75Ω video loads only. | Not suitable for 150Ω or 500Ω loads; limited to baseband CVBS/YPbPr, not RGB or high-resolution component video. | Select THS7374IPWPR only for cost-sensitive SD video systems where bandwidth <200MHz is acceptable. |
Compared with AD8174ARUZ and THS7374IPWPR, the ISL59446IRZ uniquely combines triple-channel 510MHz bandwidth, integrated gain-of-2, HIZ outputs, and ±5V operation - enabling compact, high-fidelity analog video routing without external gain or termination components.
Availability
ISL59446IRZ is available at Aetrix Electronics and suitable for HDTV/DTV analog inputs, video projectors, and broadcast video equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL59446IRZ 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
Intersil Corporation is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with deep expertise in high-speed video, interface, and signal conditioning ICs.
The ISL59446IRZ belongs to Intersil's high-performance video amplifier product line, designed specifically for broadcast-grade analog video switching, RGB routing, and component video signal conditioning in consumer and professional AV equipment.
FAQ
What is the maximum operating frequency supported by the ISL59446IRZ?
The ISL59446IRZ delivers 510MHz small-signal −3dB bandwidth into a 150Ω load, supporting full-bandwidth transmission of HD video signals including 1080i and UXGA timing. Large-signal bandwidth remains at 260MHz into 150Ω, sufficient for 2VP-P video swing with minimal distortion. This performance is confirmed in Figure 5 of the FN6261 Rev 3.00 datasheet under RL = 150Ω and CL = 2.1pF conditions.
Does the ISL59446IRZ require external gain-setting components?
No, the ISL59446IRZ features internally set gain-of-2, eliminating the need for external feedback resistors or gain-trimming components. This is explicitly stated in the datasheet Features section and verified in the Electrical Specifications table (ACL or AV = 1.94–2.04 V/V). The fixed gain simplifies layout, improves channel matching, and enhances stability across temperature and process variation.
How does the HIZ function operate in the ISL59446IRZ?
The HIZ pin is active-high and places all three outputs (OUTA/OUTB/OUTC) into a high-impedance state (~1kΩ) within ~20ns, as shown in Figure 27. An internal pull-down resistor ensures default active operation when left unconnected. This feature allows multiple ISL59446IRZ devices to share a common video bus without contention - essential in modular video switchers and multi-source display systems.
What is the correct PCB connection for the thermal pad on the ISL59446IRZ?
The thermal pad of the ISL59446IRZ is internally connected to the V− supply through the silicon substrate and must be tied to the V− net on the PCB - not to ground. Connecting it to GND risks large reverse-bias currents flowing between GND and V−, potentially damaging the device. This requirement is specified on Page 2 (Pin Descriptions) and reinforced in the PC Board Layout section (Page 13) of the FN6261 Rev 3.00 datasheet.
Can the ISL59446IRZ drive 75Ω coaxial video cables directly?
Yes - the ISL59446IRZ supports 75Ω loads via the back-loaded configuration shown in Figure 29E of the datasheet, using series resistor RS and load RL matched to 75Ω. While its specified bandwidth is characterized into 150Ω and 500Ω, the current-feedback architecture remains stable into capacitive and cable loads. For optimal pulse response, total output capacitance should be kept ≤2.1pF, and controlled-impedance traces are recommended for lengths >1 inch.
ISL59446IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- 4:1 Multiplexer-Amplifier
- Output Type:
- -
- Number of Circuits:
- 3
- -3db Bandwidth:
- 620 MHz
- Slew Rate:
- 1600V/µs
- Current - Supply:
- 44 mA
- Current - Output / Channel:
- 135 mA
- Voltage - Supply, Single/Dual (±):
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (5x6)
ISL59446IRZ FAQ
1.How can I place an order for ISL59446IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL59446IRZ 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 ISL59446IRZ reliable?
The price and inventory of ISL59446IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL59446IRZ is usually 5 days.
3.What payment methods are accepted for ISL59446IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL59446IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL59446IRZ?
ISL59446IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL59446IRZ 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 ISL59446IRZ?
For technical support, including ISL59446IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL59446IRZ requirements.
6.How does Aetrix verify that ISL59446IRZ is sourced from the original manufacturer or authorized distributors?
All ISL59446IRZ 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 ISL59446IRZ meets industry standards.
7.What is the process for return or replacement of ISL59446IRZ?
All ISL59446IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL59446IRZ, 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 ISL59446IRZ part is unused and in its original packaging.
Return procedure for ISL59446IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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