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Renesas ISL43L120IR-T
- Part No.:
- ISL43L120IR-T
- Manufacturer:
- Renesas
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
ISL43L120IR-T.pdf
- Description:
- IC SW SPST-NOX2 250MOHM 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
ISL43L120IR-T from Intersil is a dual SPST analog switch with two normally open (NO) channels, designed for precision signal routing in ultra-low-voltage, battery-powered systems. It delivers 0.16Ω ON-resistance at 3V, 13ns switching time, and operates from a single +1.65V to +3.6V supply - enabling high-fidelity audio/video switching and ASIC I/O expansion in mobile phones and portable medical devices.
For engineers reviewing the ISL43L120IR-T datasheet, ISL43L120IR-T pinout, ISL43L120IR-T application, or ISL43L120IR-T equivalent, key selection criteria include its dual-NO configuration, sub-0.2Ω RON across 1.8–3.6V, 8kV HBM ESD rating, 1.8V logic compatibility, and TDFN-8 package footprint for space-constrained PCBs.
Technical Context
The ISL43L120IR-T implements bidirectional CMOS SPST switches with independent digital control inputs driving complementary transistor pairs per channel. Its level-shifter architecture ensures reliable 1.8V-compatible logic thresholds (VINH = 1.4V min at 3V supply) while maintaining rail-to-rail analog signal range (0V to V+).
Internal ESD protection diodes connect each analog pin (NO, NC, COM) to V+ and GND, requiring strict supply-first sequencing. The device exhibits 0.005Ω RON matching and 0.008Ω RON flatness - critical for low-distortion signal paths in audio and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance (RON) | 0.16Ω at 3V supply - enables <1mΩ insertion loss in 50Ω systems and preserves signal integrity in high-precision analog paths |
| Switching Time (tON/tOFF) | 13ns/13ns at 3V - supports >10MHz signal routing without timing skew between dual channels |
| Supply Voltage Range | +1.65V to +3.6V - powers directly from single Li-ion cell or regulated 1.8V/3.3V rails without level translation |
| RON Matching | 0.005Ω max - ensures matched gain/attenuation in differential or parallel-switched configurations |
| ESD Rating (HBM) | >8kV - eliminates need for external ESD protection in handheld device front-end circuits |
| Logic Compatibility | 1.8V CMOS input thresholds (VINL ≤ 0.5V, VINH ≥ 1.4V at 3V) - interfaces directly with low-voltage microcontrollers and baseband ICs |
| Leakage Current | ±80nA max over temperature - prevents DC offset drift in high-impedance sensor multiplexing |
Pinout & Package
ISL43L120IR-T uses an 8-lead 3×3 mm thin DFN (TDFN) package with exposed thermal pad (JEDEC MO-WEEC-2 compliant). Pin 1 is marked by a dot; leads are coplanar with 0.30mm nominal width and 0.65mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Digital control input for Switch 1 | Active-high logic: drives NO1 path ON when ≥1.4V (3V supply); no internal pull-up/down |
| 2 (NO1) | Normally open analog terminal, Channel 1 | Connects to COM1 only when IN1 = high; 0.26Ω RON at 1.8V enables low-loss sensor signal routing |
| 3 (COM1) | Analog common node, Channel 1 | Shared signal path for NO1; supports bidirectional current up to 300mA continuous |
| 4 (GND) | Ground reference | Return path for supply and logic; must be low-impedance to minimize noise coupling into analog paths |
| 5 (V+) | Positive power supply | Single rail powering both analog switches and logic; absolute max 4.7V allows margin for 3.6V supply tolerance |
| 6 (COM2) | Analog common node, Channel 2 | Independent of COM1; enables true dual-channel isolation for stereo audio or dual-sensor inputs |
| 7 (NO2) | Normally open analog terminal, Channel 2 | Matches NO1 specs; permits synchronous switching of two signals with identical RON and timing |
| 8 (IN2) | Digital control input for Switch 2 | Independent of IN1; allows asymmetric control for sequenced power-up or signal gating |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low RON flatness | 0.008Ω variation over full signal range - minimizes harmonic distortion in audio band (20Hz–20kHz) applications |
| Bidirectional signal handling | Supports analog signals from 0V to V+ in either direction - eliminates polarity constraints in sensor or DAC output switching |
| Charge injection | −125pC typical - reduces glitch-induced settling time in precision ADC multiplexing (<1µs to 16-bit accuracy) |
| Off isolation | 62dB at 100kHz - suppresses crosstalk between active and inactive channels in multi-source audio routing |
| Pb-free + anneal construction | RoHS-compliant 100% matte tin terminations - compatible with SnPb and Pb-free reflow profiles per IPC/JEDEC J-STD-020 |
Applications
| Mobile Phone ASIC I/O Expansion | Portable Medical Sensor Multiplexing |
|---|---|
Use Scenario: Expanding limited analog GPIO on baseband processors to support additional sensors or audio codecs. IC Role / Device Role / Timing Role: Dual-NO analog switch routing external microphone, accelerometer, or ambient light signals to shared ADC inputs. Use Value: Eliminates need for costly ASIC redesign while preserving signal fidelity via 0.16Ω RON and 13ns switching. |
Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor outputs into a single low-power microcontroller ADC. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with matched channel characteristics. Use Value: 0.005Ω RON matching and ±80nA leakage ensure accurate DC-coupled biopotential measurement. |
| Ultra-Compact Audio Routing | Low-Voltage Test Equipment Signal Gating |
Use Scenario: Selecting between multiple audio sources (headphone jack, Bluetooth codec, speaker amplifier) in wearables. IC Role / Device Role / Timing Role: Bidirectional SPST switch handling line-level and headphone-drive signals with minimal THD+N. Use Value: 0.008Ω RON flatness and 175MHz −3dB bandwidth preserve wideband audio fidelity (20Hz–20kHz). |
Use Scenario: Gating calibration signals or DUT outputs in handheld multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Fast, low-leakage switch isolating sensitive measurement front-ends during auto-zero or range switching. Use Value: 13ns tON/tOFF enables sub-microsecond test sequencing; 62dB off-isolation prevents signal bleed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMUX1574RTER | 0.5Ω RON at 3.3V; 4-channel; 1.08mm × 1.4mm DSBGA package | Higher RON limits use in <100mV signal paths; smaller package increases assembly complexity | Choose for ultra-dense layouts where 4-channel integration offsets higher RON. |
| ADG821BRMZ | 0.4Ω RON at 3V; single-supply 1.8–5.5V; MSOP-8 package | Slower 25ns switching; lacks 1.8V logic compatibility at low V+ | Prefer when wider supply range (up to 5.5V) is required and 13ns timing is non-critical. |
Compared with TMUX1574RTER and ADG821BRMZ, the ISL43L120IR-T provides the lowest RON (0.16Ω) and fastest switching (13ns) in a standard TDFN-8 footprint - making it optimal for high-fidelity, low-voltage portable signal routing where distortion and timing skew must be minimized.
Availability
ISL43L120IR-T is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical devices, and ultra-compact audio systems requiring stable component supply across extended production lifecycles.
Supply support for ISL43L120IR-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 ISL43L120IR-T belongs to Intersil's ultra-low-RON analog switch family, engineered specifically for space- and power-constrained portable electronics needing rail-to-rail signal integrity and sub-20ns timing precision.
FAQ
What is the maximum supply voltage for the ISL43L120IR-T?
The ISL43L120IR-T has an absolute maximum V+ rating of 4.7V, with recommended operation from +1.65V to +3.6V. This 4.7V headroom accommodates 10% tolerance on 3.6V supplies and transient noise spikes without damage, while maintaining specified RON and switching performance within the 1.65–3.6V range.
Does the ISL43L120IR-T support bidirectional analog signal flow?
Yes, the ISL43L120IR-T supports fully bidirectional analog signal routing on both channels. Each NO–COM path conducts equally well in either direction, with identical RON, leakage, and capacitance specifications - enabling flexible use in sensor input, DAC output, or audio line-level switching without polarity constraints.
How does the ISL43L120IR-T handle logic-level compatibility with 1.8V microcontrollers?
The ISL43L120IR-T features guaranteed 1.8V CMOS-compatible inputs: VINL ≤ 0.5V and VINH ≥ 1.4V at 3V supply, and VINL ≤ 0.4V / VINH ≥ 1.0V at 1.8V supply. This ensures robust recognition of logic states from 1.8V MCUs without level shifters, even with supply voltages as low as 1.65V.
What thermal considerations apply to the ISL43L120IR-T in the TDFN-8 package?
The ISL43L120IR-T in 3×3 mm TDFN-8 has a typical θJA of 110°C/W. With max 300mA continuous current and 0.16Ω RON, power dissipation stays below 15mW - limiting junction temperature rise to <2°C above ambient under typical conditions. The exposed thermal pad must be soldered to a PCB copper pour for optimal heat transfer.
Can the ISL43L120IR-T replace mechanical relays in low-voltage signal switching?
Yes, the ISL43L120IR-T is a solid-state replacement for miniature mechanical relays in low-voltage (<3.6V), low-current (<300mA) signal routing. Its 13ns switching, zero contact bounce, 8kV ESD rating, and 0.16Ω RON provide superior reliability, speed, and signal integrity compared to electromechanical alternatives - especially in battery-powered portable systems.
ISL43L120IR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 250mOhm
- Channel-to-Channel Matching (ΔRon):
- 5mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 25ns, 25ns
- -3db Bandwidth:
- -
- Charge Injection:
- -125pC
- Channel Capacitance (CS(off), CD(off)):
- 182pF, 182pF
- Current - Leakage (IS(off)) (Max):
- 3nA
- Crosstalk:
- -94dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
ISL43L120IR-T FAQ
1.How can I place an order for ISL43L120IR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L120IR-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 ISL43L120IR-T reliable?
The price and inventory of ISL43L120IR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L120IR-T is usually 5 days.
3.What payment methods are accepted for ISL43L120IR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L120IR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L120IR-T?
ISL43L120IR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L120IR-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 ISL43L120IR-T?
For technical support, including ISL43L120IR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L120IR-T requirements.
6.How does Aetrix verify that ISL43L120IR-T is sourced from the original manufacturer or authorized distributors?
All ISL43L120IR-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 ISL43L120IR-T meets industry standards.
7.What is the process for return or replacement of ISL43L120IR-T?
All ISL43L120IR-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L120IR-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 ISL43L120IR-T part is unused and in its original packaging.
Return procedure for ISL43L120IR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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