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Renesas ISL43L840IR-T
- Part No.:
- ISL43L840IR-T
- Manufacturer:
- Renesas
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
ISL43L840IR-T.pdf
- Description:
- IC SWITCH SP4T X 2 750MOHM 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,042
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Product details
Overview
ISL43L840IR-T from Intersil is a dual 4:1 analog multiplexer/demultiplexer IC designed for low-voltage, single-supply operation (1.6V to 3.6V), featuring 0.5Ω ON resistance at +3V, 19ns switching time, rail-to-rail analog signal handling, and 1.8V logic compatibility - ideal for audio/video routing in portable medical devices and battery-powered handheld equipment.
For engineers reviewing the ISL43L840IR-T datasheet, ISL43L840IR-T pinout, ISL43L840IR-T application, or ISL43L840IR-T equivalent, key selection criteria include guaranteed break-before-make timing, sub-1Ω RON matching (0.12Ω), ultra-low leakage (≤30nA at +85°C), and QFN-16 package thermal performance (θJA = 75°C/W).
Technical Context
The ISL43L840IR-T implements two independent 4:1 analog multiplexers using submicron CMOS process technology, with dedicated ADDA0/ADDA1 and ADDB0/ADDB1 address inputs controlling channel selection per bank. Each switch supports bidirectional rail-to-rail signal transmission and guarantees break-before-make operation to prevent signal shorting during transitions.
Its internal level-shifting circuitry enables 1.8V CMOS-compatible digital control across the full 1.6V–3.6V supply range, while ESD protection diodes on all analog pins (HBM >4kV) and low charge injection (−96pC at 3V) ensure signal integrity in precision sampling and audio switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Dual 4:1 analog multiplexer with independent A/B banks and separate address inputs |
| ON Resistance (RON) | 0.5Ω at +3V supply - enables minimal voltage drop and power loss in low-current analog paths |
| RON Matching | 0.12Ω max between channels - ensures consistent gain and signal fidelity across selected paths |
| Switching Time (tTRANS) | 19ns at +3V - supports high-speed signal routing up to ~70MHz bandwidth |
| Supply Range | +1.6V to +3.6V single supply - compatible with Li-ion, Li-poly, and regulated 1.8V/3.3V rails |
| Off-Leakage Current | 30nA max at +85°C - preserves accuracy in high-impedance sensor and medical front-end circuits |
| Package | 16-pin 3×3 mm QFN (L16.3x3) with exposed thermal pad - provides 75°C/W junction-to-ambient thermal resistance |
Pinout & Package
ISL43L840IR-T is packaged in a 16-lead 3×3 mm QFN (JEDEC MO-220VEED-2 compliant) with exposed thermal pad connected to GND. Pin 1 is marked by corner chamfer or mold index within top-side marking zone.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 1.6V–3.6V single supply; powers analog switches and internal logic |
| GND | Ground reference | Reference for analog signals and digital inputs; connects to QFN thermal pad |
| COMA / COMB | Analog common outputs | Single output node per multiplexer bank; bidirectional signal path |
| A0–A3 / B0–B3 | Analog input channels | Four independent analog inputs per bank; support rail-to-rail voltage swing |
| ADDA0/ADDA1 / ADDB0/ADDB1 | Digital address inputs | Binary-select lines for channel routing; 1.8V logic compatible at +3V supply |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | 4ns typical tBBM prevents momentary shorting during channel switching |
| RON flatness | 0.056Ω variation over full signal range - maintains linearity in precision instrumentation |
| Low power consumption | <0.2µW quiescent - extends battery life in always-on portable systems |
| High current capability | 300mA continuous per channel - supports driving headphones and active filters |
| Pb-free RoHS compliance | Matte tin termination and Pb-free molding compound - meets IPC/JEDEC J-STD-020C reflow requirements |
Applications
| Portable Medical Monitoring | Mobile Audio Routing |
|---|---|
Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor analog outputs into a shared ADC channel in handheld patient monitors. IC Role / Device Role / Timing Role: Dual 4:1 analog multiplexer providing low-distortion, low-leakage signal selection with guaranteed break-before-make timing. Use Value: 0.5Ω RON and 30nA max off-leakage preserve microvolt-level biopotential signal integrity without calibration drift. | Use Scenario: Switching between microphone inputs, line-in sources, and headphone outputs in smartphones and wireless earbuds. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling flexible audio path configuration under 1.8V logic control. Use Value: 19ns switching time and −100dB crosstalk prevent audible pop/click and inter-channel interference. |
| Laptop Docking Station I/O | Portable Test Equipment |
Use Scenario: Routing HDMI audio return channel (ARC), USB-C analog audio, and legacy 3.5mm jack signals to a single codec in compact docking solutions. IC Role / Device Role / Timing Role: Dual-bank analog multiplexer supporting simultaneous independent source selection for mixed-signal interfaces. Use Value: Rail-to-rail signal handling and 0.12Ω RON matching ensure consistent audio level and THD <0.02% across all paths. | Use Scenario: Configuring test signal paths in handheld multimeters and portable oscilloscope probes for auto-ranging and channel calibration. IC Role / Device Role / Timing Role: Precision analog switch enabling low-noise, low-offset signal conditioning before digitization. Use Value: 65dB off-isolation at 100kHz and 70MHz bandwidth allow clean high-frequency measurements without feedthrough artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMUX1308PWR | Single 8:1 mux, 0.75Ω RON at 3.3V, 22ns tTRANS, 16-pin TSSOP only | Requires redesign for single-bank topology; lacks dual independent banks | Choose when space-constrained layouts need higher channel density and accept reduced flexibility |
| ADG732BRUZ | Dual 16:1 mux, 4.5Ω RON at 3V, 12ns tTRANS, 28-pin TSSOP | Higher RON limits use in low-voltage precision paths; larger footprint | Prefer for applications requiring more than 4 inputs per bank and tolerating higher conduction loss |
Compared with TMUX1308PWR and ADG732BRUZ, the ISL43L840IR-T delivers superior low-RON performance in a compact QFN package, making it optimal for battery-sensitive, high-fidelity analog routing where dual independent 4:1 selection is required.
Availability
ISL43L840IR-T is available at Aetrix Electronics and suitable for portable medical monitoring, mobile audio routing, laptop docking station I/O, and portable test equipment requiring stable component supply and long-term lifecycle support.
Supply support for ISL43L840IR-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
Intersil Corporation (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The ISL43L840IR-T belongs to Intersil's ultra-low-RON analog switch product line, engineered specifically for battery-powered portable systems demanding rail-to-rail signal handling, sub-1Ω conduction, and 1.8V logic compatibility.
FAQ
What is the maximum supply voltage rating for the ISL43L840IR-T?
The ISL43L840IR-T has an absolute maximum V+ to GND rating of −0.3V to +4.7V. Its recommended operating supply range is +1.6V to +3.6V. This 4.7V maximum accommodates transient overshoot and 10% tolerance on 3.6V rails without damage, unlike older switches limited to 4.0V.
Does the ISL43L840IR-T support rail-to-rail analog signal operation?
Yes, the ISL43L840IR-T supports rail-to-rail analog signal operation across its full specified supply range (1.6V to 3.6V). Input and output signals can swing from GND to V+, enabling full utilization of ADC dynamic range and preserving signal headroom in low-voltage systems.
What is the thermal resistance (θJA) of the ISL43L840IR-T in its QFN package?
The ISL43L840IR-T in the 16-lead 3×3 mm QFN package has a typical junction-to-ambient thermal resistance (θJA) of 75°C/W when mounted on a standard PCB with adequate copper pour. This is significantly lower than the 150°C/W of the TSSOP variant, improving power dissipation capability in thermally constrained designs.
Is the ISL43L840IR-T pin-compatible with the ISL43L840IV-T?
No, the ISL43L840IR-T (QFN) and ISL43L840IV-T (TSSOP) share identical electrical functionality and pin functions but differ in physical layout and package dimensions. Their pinouts are functionally equivalent but not mechanically interchangeable - PCB layout must be redesigned when switching between packages.
What is the guaranteed break-before-make time for the ISL43L840IR-T?
The ISL43L840IR-T guarantees break-before-make timing with a typical tBBM of 4ns at +3.3V supply and 25°C. The maximum specified value is 1ns across the full temperature range (−40°C to +85°C), ensuring no overlap between switch closures during channel transitions.
ISL43L840IR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -96pC
- Channel Capacitance (CS(off), CD(off)):
- 62pF
- 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-QFN (3x3)
ISL43L840IR-T FAQ
1.How can I place an order for ISL43L840IR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L840IR-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 ISL43L840IR-T reliable?
The price and inventory of ISL43L840IR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L840IR-T is usually 5 days.
3.What payment methods are accepted for ISL43L840IR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L840IR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L840IR-T?
ISL43L840IR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L840IR-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 ISL43L840IR-T?
For technical support, including ISL43L840IR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L840IR-T requirements.
6.How does Aetrix verify that ISL43L840IR-T is sourced from the original manufacturer or authorized distributors?
All ISL43L840IR-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 ISL43L840IR-T meets industry standards.
7.What is the process for return or replacement of ISL43L840IR-T?
All ISL43L840IR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L840IR-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 ISL43L840IR-T part is unused and in its original packaging.
Return procedure for ISL43L840IR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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