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Renesas ISL84782IRZ
- Part No.:
- ISL84782IRZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL84782IRZ.pdf
- Description:
- IC SWITCH SP4TX2 750MOHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
ISL84782IRZ from Intersil is a differential 4-to-1 analog multiplexer IC designed for low-voltage, single-supply signal routing in portable systems. It delivers 0.5 Ω ON resistance at +3 V, 16 ns turn-on time, rail-to-rail analog signal handling, and 1.8 V logic compatibility - enabling precision audio/video switching and battery-powered sensor multiplexing.
For engineers reviewing the ISL84782IRZ datasheet, ISL84782IRZ pinout, ISL84782IRZ application, or ISL84782IRZ equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for low-voltage analog switching designs.
Technical Context
The ISL84782IRZ implements a CMOS-based differential 4:1 mux architecture with break-before-make switching and integrated inhibit control. Its dual COM outputs (COMA/COMB) switch synchronously across four matched A/B channel pairs under ADD0/ADD1 address decoding and INH global disable.
It operates from a single +1.6 V to +3.6 V supply, supports rail-to-rail analog signals up to V+, and maintains sub-0.2 Ω RON matching and 0.056 Ω RON flatness at +3 V - critical for low-distortion, high-fidelity signal path integrity in portable audio and medical front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Differential 4:1 analog multiplexer with dual COM outputs (COMA/COMB) |
| ON Resistance (RON) | 0.5 Ω at +3 V supply - enables minimal voltage drop and power loss in low-current analog paths |
| RON Matching | 0.12 Ω max between channels - ensures consistent gain and signal fidelity across all 4 switched pairs |
| Switching Time (tON/tOFF) | 16 ns / 13 ns at +3 V - supports high-speed data acquisition and dynamic channel selection |
| Analog Signal Range | Rail-to-rail (0 V to V+) - preserves full dynamic range of baseband audio, sensor, and video signals |
| Logic Compatibility | 1.8 V CMOS inputs with 0.5 V/1.4 V thresholds at +3 V supply - interfaces directly with modern low-voltage microcontrollers |
| Off-Leakage Current | 4 nA max at +25°C, 30 nA max at +85°C - prevents DC error accumulation in high-impedance sensor nodes |
Pinout & Package
ISL84782IRZ is packaged in a 16-lead 3×3 mm thin QFN (L16.3x3A) with exposed thermal pad. Pin 1 is located at the bottom-left corner adjacent to the index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Single 1.6–3.6 V system rail; powers internal switches and level shifters |
| GND | Ground reference | Return path for analog signals and digital logic; must be low-impedance |
| INH | Inhibit control input | Active-high global disable: drives all switches open when pulled to V+ |
| ADD0, ADD1 | Binary address inputs | Select one of four A/B channel pairs (00→A0/B0, 01→A1/B1, etc.) |
| COMA, COMB | Differential output terminals | Paired outputs carrying selected differential analog signal |
| A0–A3, B0–B3 | Differential input channels | Four matched differential input pairs; each pair routed to COMA/COMB when selected |
| N.C. | No-connect terminal | Internally unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low RON | 0.5 Ω at +3 V enables <1 mV drop at 2 mA - critical for precision instrumentation front-ends |
| Guaranteed break-before-make | 4 ns minimum tBBM prevents momentary shorting during channel transitions - eliminates signal glitches |
| High current handling | 300 mA continuous per switch - supports driving low-impedance loads like audio codecs or ADC drivers |
| Low charge injection | −65 pC typical - minimizes voltage step artifacts at COM outputs during switching |
| Pb-free RoHS compliance | L16.3x3A package with 100% matte tin termination - compatible with SnPb and Pb-free reflow profiles |
Applications
| Audio Signal Routing | Portable Medical Sensors |
|---|---|
Use Scenario: Switching between multiple microphone inputs or stereo line-level sources in Bluetooth headsets and voice-controlled wearables. IC Role / Device Role / Timing Role: Differential analog multiplexer selecting active audio path while maintaining common-mode rejection and THD <0.02%. Use Value: 0.5 Ω RON and 100 dB crosstalk suppression preserve SNR and prevent channel bleed in compact PCB layouts. | Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor outputs into a shared ADC in handheld patient monitors. IC Role / Device Role / Timing Role: Low-leakage (4 nA), rail-to-rail analog switch enabling accurate DC-coupled biopotential measurement without offset drift. Use Value: Sub-0.2 Ω RON matching ensures consistent gain calibration across all sensor channels. |
| Mobile Phone Front-End | Test Equipment Channel Selection |
Use Scenario: Routing RF front-end test signals or antenna diversity paths in cellular handset validation fixtures. IC Role / Device Role / Timing Role: High-isolation (65 dB @100 kHz), fast-switching (16 ns) mux for automated RF path configuration. Use Value: 70 MHz −3 dB bandwidth and low off-capacitance (218 pF) minimize signal distortion in 50 Ω systems. | Use Scenario: Selecting between multiple DUTs or signal sources in benchtop multimeter or oscilloscope accessory modules. IC Role / Device Role / Timing Role: Precision analog switch with guaranteed break-before-make timing for safe hot-swap channel reconfiguration. Use Value: 300 mA current rating allows direct connection to relay drivers or buffer amplifiers without external support circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4782ETE+ | Pin-compatible but higher RON (0.9 Ω typ at +3 V) and slower tON (25 ns) | Less suitable for ultra-low-distortion audio; acceptable for general-purpose portable I/O expansion | Choose MAX4782ETE+ only if legacy footprint reuse is required and 0.4 Ω RON margin is acceptable. |
| TMUX1574RTER | Lower leakage (1 nA max), wider supply (1.08–3.6 V), but no differential COM outputs | Requires redesign for single-ended signal chains; better for ultra-low-power IoT sensor hubs | Select TMUX1574RTER when single-ended topology and sub-2 nA leakage outweigh need for differential routing. |
Compared with MAX4782ETE+ and TMUX1574RTER, the ISL84782IRZ uniquely combines differential 4:1 architecture, 0.5 Ω RON, and guaranteed break-before-make - making it optimal for space-constrained, high-fidelity portable analog systems where channel matching and glitch-free switching are mandatory.
Availability
ISL84782IRZ is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical devices, and audio/video switching applications requiring stable component supply across extended production lifecycles.
Supply support for ISL84782IRZ 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 U.S.-based semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.
The ISL84782IRZ belongs to Intersil's ultra-low-RON analog switch family, engineered specifically for high-fidelity, low-voltage signal routing in portable and battery-sensitive applications.
FAQ
What is the maximum supply voltage rating for the ISL84782IRZ?
The ISL84782IRZ has an absolute maximum supply voltage of 4.7 V, with recommended operation from +1.6 V to +3.6 V. This 4.7 V rating accommodates transient overshoot on nominal 3.3 V or 3.6 V rails while maintaining robust ESD protection and reliable switching performance across its full operating temperature range of −40°C to +85°C. The ISL84782IRZ remains functional below 1.6 V but exhibits degraded RON and timing specs.
Does the ISL84782IRZ support true differential signal switching?
Yes, the ISL84782IRZ implements a true differential 4:1 multiplexer architecture with two independent output terminals - COMA and COMB - that simultaneously route complementary signals from any selected A/B input pair (e.g., A2/B2). This enables balanced signal paths essential for noise rejection in audio, medical, and RF front-end applications. Unlike single-ended muxes, the ISL84782IRZ preserves common-mode integrity without requiring external pairing components.
How does the INH pin function in the ISL84782IRZ?
The INH (inhibit) pin on the ISL84782IRZ is an active-high digital control input that globally disables all analog switches when driven to V+. When INH = V+, all eight internal switches (four A and four B paths) are forced open regardless of ADD0/ADD1 state - ensuring complete signal isolation. When INH = GND, normal address-decoded switching resumes. This feature enables rapid system-level power gating or fault-safe shutdown without altering address logic, and is fully compatible with 1.8 V CMOS logic levels at +3 V supply.
What is the thermal resistance (θJA) of the ISL84782IRZ in its QFN package?
The ISL84782IRZ in the 16-lead 3×3 mm thin QFN (L16.3x3A) package has a typical junction-to-ambient thermal resistance (θJA) of 75°C/W when mounted on a standard PCB with adequate copper pour and thermal vias under the exposed paddle. This value assumes free-air convection and is significantly lower than the 150°C/W of the TSSOP variant, enabling higher sustained current operation (up to 300 mA per switch) without thermal derating in compact portable designs.
Is the ISL84782IRZ RoHS compliant and lead-free?
Yes, the ISL84782IRZ is RoHS compliant and fully lead-free, using 100% matte tin-plated terminations and Pb-free molding compounds. It meets IPC/JEDEC J-STD-020C reflow requirements for Pb-free processes and is rated MSL-1 - meaning it can be stored indefinitely without dry-packaging. The "Z" suffix in ISL84782IRZ explicitly denotes the Pb-free version, and its thermal pad must be soldered to a PCB ground plane for both electrical performance and thermal reliability.
ISL84782IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 750mOhm
- Channel-to-Channel Matching (ΔRon):
- 120mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 25ns, 23ns
- -3db Bandwidth:
- -
- Charge Injection:
- -65pC
- Channel Capacitance (CS(off), CD(off)):
- 62pF, 218pF
- Current - Leakage (IS(off)) (Max):
- 4nA
- Crosstalk:
- -100dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL84782IRZ FAQ
1.How can I place an order for ISL84782IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL84782IRZ 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 ISL84782IRZ reliable?
The price and inventory of ISL84782IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL84782IRZ is usually 5 days.
3.What payment methods are accepted for ISL84782IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL84782IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL84782IRZ?
ISL84782IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL84782IRZ 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 ISL84782IRZ?
For technical support, including ISL84782IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL84782IRZ requirements.
6.How does Aetrix verify that ISL84782IRZ is sourced from the original manufacturer or authorized distributors?
All ISL84782IRZ 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 ISL84782IRZ meets industry standards.
7.What is the process for return or replacement of ISL84782IRZ?
All ISL84782IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL84782IRZ, 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 ISL84782IRZ part is unused and in its original packaging.
Return procedure for ISL84782IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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