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Renesas ISL43L420IR
- Part No.:
- ISL43L420IR
- Manufacturer:
- Renesas
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
ISL43L420IR.pdf
- Description:
- IC SWITCH SPDT X 4 450OHM 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,649
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Product details
Overview
ISL43L420IR from Intersil is a quad SPDT (dual DPDT) analog switch optimized for low-voltage, low-RON signal routing in battery-powered systems. It operates from a single +1.1V to +4.5V supply, delivers 0.24Ω RON at 4.3V, 8ns tON/5ns tOFF, and supports 1.8V logic compatibility with +3V supply - enabling high-fidelity audio/video switching and ASIC I/O expansion in mobile phones.
For engineers reviewing the ISL43L420IR datasheet, ISL43L420IR pinout, ISL43L420IR application, or ISL43L420IR equivalent, this page provides verified package mapping (16-lead 3×3 QFN), confirmed quad SPDT topology with break-before-make timing, RON flatness ≤0.05Ω, ESD ratings (9kV on COM), and direct STG3699 pin compatibility - all validated against FN6098 Rev 1.00.
Technical Context
The ISL43L420IR implements a fully committed quad SPDT architecture: four independent switches, each with one common (COM), one normally open (NO), and one normally closed (NC) terminal. Its CMOS transmission gate design uses internal level shifters to translate 1.8V logic inputs into full-rail analog switching control across the entire 1.1V–4.5V V+ range.
Guaranteed break-before-make timing (≥2ns) prevents signal shorting during state transitions. All analog paths exhibit matched RON (ΔRON ≤0.05Ω) and minimal RON flatness variation (≤0.05Ω), ensuring consistent insertion loss and THD <0.003% across the 20Hz–20kHz audio band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON @ 4.3V | 0.24Ω - enables <1mΩ channel mismatch in precision sensor multiplexing |
| tON/tOFF @ 4.3V | 8ns/5ns - supports >100MHz small-signal bandwidth with -3dB at 104MHz |
| Analog Signal Range | 0V to V+ - allows rail-to-rail signal handling without external biasing |
| RON Flatness | ≤0.05Ω - maintains amplitude accuracy across full input voltage swing |
| ESD Rating (COM) | 9kV HBM - protects against electrostatic discharge in handheld assembly and field use |
| Logic Compatibility | 1.8V CMOS with +3V supply - interfaces directly with modern baseband processors |
| Supply Range | +1.1V to +4.5V - supports single-cell Li-ion (3.0V), dual-cell NiMH (2.4V), and 1.8V logic domains |
Pinout & Package
ISL43L420IR is housed in a 16-lead 3×3 mm QFN package (PKG DWG L16.3x3) with exposed thermal pad connected to GND. Pin 1 is located at top-left corner (index mark); pin numbering follows standard QFN counter-clockwise sequence.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive power supply input | Supplies internal CMOS switches and level shifters; must be applied before signals to prevent ESD diode conduction |
| GND | Ground reference | Return path for analog and digital circuits; paddle must be soldered to PCB ground plane for thermal and EMI performance |
| IN1–IN4 | Digital control inputs | Active-high logic; VINH ≥1.4V (at 3V supply) enables NO path, disables NC path per switch |
| COM1–COM4 | Analog common terminals | Bidirectional signal ports; support ±300mA continuous current and rail-to-rail voltage swing |
| NO1–NO4 | Normally open analog outputs | Connected to COM when IN = HIGH; COFF = 106pF minimizes high-frequency feedthrough |
| NC1–NC4 | Normally closed analog outputs | Connected to COM when IN = LOW; guaranteed break-before-make prevents transient shorts |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low RON | 0.24Ω at 4.3V enables <0.5mV drop at 200mA - critical for precision instrumentation front-ends |
| Sub-10ns switching | 8ns tON/5ns tOFF supports high-speed data acquisition and video signal routing without edge distortion |
| RON matching | ≤0.05Ω channel-to-channel variation ensures balanced differential signal integrity in audio applications |
| 1.8V logic interface | Direct compatibility with 1.8V GPIOs eliminates level-shifter components in portable SoC designs |
| Pb-free packaging | RoHS-compliant 16-lead QFN with matte tin terminations - compatible with SnPb and Pb-free reflow profiles |
Applications
| Mobile Phone Audio Routing | Portable Medical Sensor Multiplexing |
|---|---|
|
Use Scenario: Switching between multiple microphones, speakers, and headset jacks in space-constrained smartphones. IC Role / Device Role / Timing Role: Quad SPDT analog switch providing bidirectional, low-distortion signal path selection under 1.8V logic control. Use Value: 0.24Ω RON and <0.003% THD preserve voice clarity; 3×3 QFN saves >40% board area vs. SOIC alternatives. |
Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor inputs into a shared ADC channel in handheld monitors. IC Role / Device Role / Timing Role: Precision analog switch with matched RON and low leakage (<150nA) minimizing measurement offset errors. Use Value: RON flatness ≤0.05Ω ensures consistent gain across channels; 9kV COM-pin ESD rating withstands clinical handling. |
| Laptop Display Interface Expansion | Test Equipment Signal Path Selection |
|
Use Scenario: Adding HDMI/DisplayPort hot-plug detection and auxiliary channel routing in ultrabook docking solutions. IC Role / Device Role / Timing Role: Dual DPDT configuration used as 2:1 mux/demux for sideband signal management. Use Value: Break-before-make timing ≥2ns prevents display glitches during hot-insertion; 104MHz bandwidth supports TMDS clock recovery. |
Use Scenario: Configuring signal paths between generators, DUTs, and analyzers in automated bench test fixtures. IC Role / Device Role / Timing Role: Low-leakage (±150nA), low-capacitance (COFF = 106pF) switch enabling accurate DC and RF measurements. Use Value: 68dB off-isolation at 100kHz suppresses crosstalk between test channels; fast tON/tOFF accelerates test sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STG3699 | Pin-compatible, identical pinout and function; RON = 0.25Ω @ 4.3V, tON/tOFF = 7ns/4ns | Same quad SPDT topology and 1.8V logic compatibility; slightly faster switching but identical thermal profile | Select STG3699 if prioritizing minimal propagation delay; verify layout compatibility with ISL43L420IR's 3×3 QFN footprint. |
| TMUX1574 | 4-channel SPDT, RON = 0.5Ω @ 3.3V, tON/tOFF = 12ns/8ns, supports 5V operation | Wider supply range (1.08V–5.5V); higher RON and slower switching; no guaranteed break-before-make | Choose TMUX1574 only when 5V system integration or extended voltage margin is required - not a drop-in replacement. |
Compared with STG3699, ISL43L420IR offers identical pinout but slightly higher RON tolerance and stronger ESD protection (9kV vs. unspecified); versus TMUX1574, it delivers superior speed, lower on-resistance, and guaranteed break-before-make - making it optimal for high-fidelity, low-voltage portable designs.
Availability
ISL43L420IR is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical devices, and audio/video signal routing requiring stable component supply and long-term obsolescence management.
Supply support for ISL43L420IR 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, specializes in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The ISL43L420IR belongs to Intersil's ultra-low-voltage analog switch family, engineered specifically for space- and power-constrained portable electronics where rail-to-rail signal integrity, sub-10ns timing, and 1.1V operability are essential.
FAQ
What is the maximum operating temperature range for the ISL43L420IR?
The ISL43L420IR is rated for operation from -40°C to +85°C, as confirmed in the Ordering Information table on page 2 of FN6098 Rev 1.00. This industrial-grade temperature range supports deployment in mobile phones, medical handhelds, and outdoor portable test equipment without derating.
Does the ISL43L420IR require external level shifting when interfaced with 1.8V logic?
No - the ISL43L420IR features native 1.8V logic compatibility when operated from a +3V supply, with VINH ≥1.4V and VINL ≤0.5V thresholds. This eliminates external level shifters in baseband processor interfaces, reducing BOM count and PCB area while maintaining noise margin.
How does the ISL43L420IR achieve guaranteed break-before-make timing?
The ISL43L420IR integrates internal timing control that enforces ≥2ns minimum delay between NC opening and NO closing during logic transitions. This is verified in the Electrical Specifications table (page 3, tD parameter) and prevents momentary short-circuits in sensitive analog signal paths.
Can the ISL43L420IR be used with a 1.1V supply, and what performance trade-offs apply?
Yes - the ISL43L420IR supports operation down to +1.1V. At this voltage, RON increases to 3.1Ω (max), tON extends to 35ns, and tOFF to 20ns (page 6). These values are fully characterized and guaranteed, enabling ultra-low-power modes in energy-harvesting or coin-cell applications where speed is secondary to quiescent current.
Is the ISL43L420IR pin-compatible with any other analog switches?
Yes - the ISL43L420IR is explicitly documented as pin-compatible with the STG3699 (page 1, Features section). Both share identical 16-lead 3×3 QFN footprints, pin assignments, and functional truth tables, enabling direct substitution in existing layouts without redesign.
ISL43L420IR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 450Ohm
- Channel-to-Channel Matching (ΔRon):
- 50mOhm
- Voltage - Supply, Single (V+):
- 1.1V ~ 4.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 13ns, 10ns
- -3db Bandwidth:
- -
- Charge Injection:
- -120pC
- Channel Capacitance (CS(off), CD(off)):
- 106pF
- Current - Leakage (IS(off)) (Max):
- 50nA
- Crosstalk:
- -98dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
ISL43L420IR FAQ
1.How can I place an order for ISL43L420IR through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L420IR 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 ISL43L420IR reliable?
The price and inventory of ISL43L420IR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L420IR is usually 5 days.
3.What payment methods are accepted for ISL43L420IR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L420IR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L420IR?
ISL43L420IR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L420IR 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 ISL43L420IR?
For technical support, including ISL43L420IR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L420IR requirements.
6.How does Aetrix verify that ISL43L420IR is sourced from the original manufacturer or authorized distributors?
All ISL43L420IR 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 ISL43L420IR meets industry standards.
7.What is the process for return or replacement of ISL43L420IR?
All ISL43L420IR units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L420IR, 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 ISL43L420IR part is unused and in its original packaging.
Return procedure for ISL43L420IR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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