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Renesas ISL43L420IRZ-T
- Part No.:
- ISL43L420IRZ-T
- Manufacturer:
- Renesas
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
ISL43L420IRZ-T.pdf
- Description:
- IC SWITCH SPDT X 4 450OHM 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,687
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Product details
Overview
ISL43L420IRZ-T from Intersil is a quad SPDT (dual DPDT) analog switch optimized for ultra-low on-resistance (0.24 Ω at 4.3V), fast switching (tON = 8 ns, tOFF = 5 ns), and single-supply operation from +1.1V to +4.5V. It serves as a signal routing device in battery-powered portable systems where low voltage operation, minimal insertion loss, and guaranteed break-before-make timing are critical - such as cellular phone ASIC I/O expansion.
For engineers reviewing the ISL43L420IRZ-T datasheet, ISL43L420IRZ-T pinout, ISL43L420IRZ-T application, or ISL43L420IRZ-T equivalent, key selection criteria include RON flatness (0.05 Ω), 1.8V logic compatibility at 3V supply, 9kV HBM ESD rating on COM pins, and Pb-free 3×3 mm QFN-16 packaging with thermal paddle.
Technical Context
The ISL43L420IRZ-T implements four independent bidirectional SPDT switches with normally open (NO) and normally closed (NC) paths per channel, enabling dual 2:1 multiplexer/demultiplexer or differential dual 2:1 configurations. Its CMOS architecture uses level-shifted digital inputs to drive internal transmission gates across the full 1.1–4.5V supply range.
Guaranteed break-before-make timing (≥2 ns) prevents signal shorting during state transitions. Input logic thresholds (VINL ≤ 0.5V, VINH ≥ 1.4V at 3V supply) ensure reliable 1.8V CMOS compatibility without external level translation, while charge injection (−120 pC typical at 4.3V) and crosstalk (−98 dB at 100 kHz) support high-fidelity audio/video signal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPDT (dual DPDT); enables two independent 2:1 mux/demux paths or diff dual 2:1 configuration |
| RON (4.3V) | 0.24 Ω typical; ensures <0.01 dB insertion loss in 50 Ω systems and minimal THD (0.003%) |
| tON/tOFF (4.3V) | 8 ns / 5 ns typical; supports >100 MHz −3 dB bandwidth for RF and high-speed data routing |
| Supply Range | +1.1V to +4.5V single supply; operates down to 1.1V with functional RON (3.1 Ω max) and tON (35 ns max) |
| ESD Rating (COM) | 9 kV HBM; protects analog signal paths in handheld devices subject to user handling discharge |
| Package | 16-lead 3×3 mm QFN with exposed thermal pad; provides low θJA (75°C/W) and board space efficiency |
| Logic Compatibility | 1.8V CMOS input thresholds at 3V supply (VINL ≤ 0.5V, VINH ≥ 1.4V); eliminates need for external level shifters |
Pinout & Package
ISL43L420IRZ-T is housed in a 16-lead 3×3 mm QFN package with exposed thermal pad (Pb-free, JEDEC MO-220 compliant). Pin 1 identifier is located at top-left corner per standard orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Single power input (1.1–4.5V); powers analog switches and internal level shifters; must be applied before signals |
| GND | Ground reference | Return path for supply and signal; thermal pad must be soldered to PCB ground plane for thermal performance |
| IN1–IN4 | Digital control inputs | Active-high logic inputs; each controls one SPDT switch pair (NO/NC); compatible with 1.8V CMOS at 3V supply |
| COM1–COM4 | Analog common terminals | Bidirectional signal path inputs/outputs; rated for ±300 mA continuous current; 9 kV HBM ESD protection |
| NO1–NO4 | Normally open analog outputs | Connected to COM when IN = high; low RON flatness (0.05 Ω) ensures uniform signal attenuation across voltage range |
| NC1–NC4 | Normally closed analog outputs | Connected to COM when IN = low; matched RON (ΔRON ≤ 0.09 Ω) enables precise channel-to-channel tracking |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low RON | 0.24 Ω at 4.3V enables <0.01 dB insertion loss in 50 Ω systems and preserves signal integrity in precision audio paths |
| Break-before-make guarantee | Minimum 2 ns delay prevents momentary shorting between NO and NC paths during switching - critical for avoiding signal corruption |
| RON matching & flatness | 0.05 Ω channel-to-channel ΔRON and 0.05 Ω flatness over full signal range minimize gain mismatch in multi-channel applications |
| Low leakage & charge injection | 150 nA max OFF leakage and −120 pC typical charge injection reduce DC offset and transient glitches in sensitive sensor/mux circuits |
| Pb-free 3×3 mm QFN | RoHS-compliant package with thermal paddle reduces θJA to 75°C/W and saves >60% board area vs. SOIC-16 |
Applications
| Cellular Phone ASIC I/O Expansion | Portable Audio Signal Routing |
|---|---|
Use Scenario: Expanding limited analog GPIO count on mobile phone ASICs by muxing additional sensors, codecs, or antennas without redesigning baseband IC. IC Role / Device Role / Timing Role: Quad SPDT analog switch providing bidirectional, low-distortion signal routing with guaranteed break-before-make timing to prevent cross-talk during reconfiguration. Use Value: Enables 4× additional analog functions using only 4 digital control lines; 0.24 Ω RON preserves SNR in microphone/audio paths; 9 kV COM-pin ESD withstands user-handling events. | Use Scenario: Switching between multiple audio sources (e.g., Bluetooth, line-in, mic) in compact wireless earbuds or portable speakers. IC Role / Device Role / Timing Role: Low-RON, low-charge-injection analog switch routing stereo channels with minimal THD (0.003%) and crosstalk (−98 dB). Use Value: Maintains audiophile-grade fidelity across supply range (1.1–4.5V); 8 ns tON supports fast source switching; 3×3 mm QFN fits tight PCB layouts. |
| Medical Patient Monitoring Front-End | Handheld Test Equipment Multiplexing |
Use Scenario: Selecting among ECG, SpO₂, and temperature sensor inputs in battery-powered patient monitors requiring low power and high accuracy. IC Role / Device Role / Timing Role: Precision analog switch with <150 nA leakage and 0.05 Ω RON flatness ensuring stable DC-coupled signal acquisition across body-worn electrodes. Use Value: Sub-μW quiescent power (<0.2 μW) extends battery life; 1.1V minimum supply allows operation from depleted coin cells; low charge injection avoids baseline drift. | Use Scenario: Multiplexing multiple DMM or oscilloscope probe inputs in portable test gear where signal integrity and fast settling are essential. IC Role / Device Role / Timing Role: High-bandwidth (104 MHz −3 dB) analog switch with 68 dB off-isolation enabling clean channel separation in multi-input measurement systems. Use Value: 50 Ω system compatibility and flat frequency response minimize calibration overhead; 16-pin QFN simplifies layout in space-constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STG3699QTR | Pin-compatible but higher RON (0.35 Ω typ at 4.5V); no 1.1V operation; 4kV HBM on all pins (vs. 9kV on COM for ISL43L420IRZ-T) | Targeted at industrial automation where ESD robustness is less critical than cost; lacks ultra-low-voltage capability | Select STG3699QTR only if legacy design reuse or lower BOM cost outweighs need for sub-1.2V operation and enhanced COM-pin ESD protection. |
| TMUX1574RTER | Lower RON flatness (0.02 Ω), but requires 1.08–4.5V supply; no guaranteed break-before-make; 2.5kV HBM on COM | Optimized for high-precision instrumentation with tighter RON matching; not suitable for handheld ESD-prone environments | Choose TMUX1574RTER when RON matching is paramount and ESD exposure is controlled; avoid where guaranteed break-before-make or >4kV COM-pin ESD is required. |
Compared with STG3699QTR and TMUX1574RTER, ISL43L420IRZ-T uniquely delivers 1.1V operability, 9kV COM-pin ESD, and guaranteed break-before-make - making it the only option for ultra-low-power, user-handled portable designs demanding both robustness and signal fidelity.
Availability
ISL43L420IRZ-T is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical monitoring, and audio/video signal routing requiring stable component supply and long-term lifecycle support.
Supply support for ISL43L420IRZ-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) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for high-reliability applications.
The ISL43L420 product line was designed specifically for ultra-low-voltage, high-fidelity analog signal routing in space-constrained portable electronics - emphasizing RON minimization, ESD resilience, and seamless integration with 1.8V logic domains.
FAQ
What is the minimum operating voltage for the ISL43L420IRZ-T?
The ISL43L420IRZ-T operates down to +1.1V supply voltage, with verified functionality including RON (3.1 Ω max), tON (35 ns max), and logic compatibility (VINH ≥ 0.6V). This enables direct use with partially discharged Li-ion or coin-cell batteries in portable designs without voltage boosting.
Does the ISL43L420IRZ-T support break-before-make switching?
Yes, the ISL43L420IRZ-T guarantees break-before-make timing with a minimum delay of 2 ns across the full temperature range (−40°C to +85°C). This prevents momentary shorting between NO and NC paths during state transitions - essential for avoiding signal corruption in multiplexed analog systems.
What is the ESD rating on the COM pins of the ISL43L420IRZ-T?
The COM pins of the ISL43L420IRZ-T are rated for >9 kV HBM ESD protection, significantly exceeding standard requirements. This robustness is critical for handheld applications like cellular phones and portable medical devices where user handling introduces frequent electrostatic discharge events.
Is the ISL43L420IRZ-T pin-compatible with any other analog switches?
Yes, the ISL43L420IRZ-T is explicitly documented as a drop-in replacement for the STG3699, sharing identical pinout, package (16-lead 3×3 mm QFN), and functional behavior. However, ISL43L420IRZ-T offers superior specifications including lower RON, wider supply range, and enhanced COM-pin ESD rating.
What is the typical charge injection value for the ISL43L420IRZ-T at 4.3V supply?
The typical charge injection for the ISL43L420IRZ-T is −120 pC at 4.3V supply, measured with CL = 1.0 nF and RG = 0 Ω. This low value minimizes voltage glitches on high-impedance nodes - critical for precision sensor interfaces and sample-and-hold circuits where baseline stability is essential.
ISL43L420IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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)
ISL43L420IRZ-T FAQ
1.How can I place an order for ISL43L420IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L420IRZ-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 ISL43L420IRZ-T reliable?
The price and inventory of ISL43L420IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L420IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL43L420IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L420IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L420IRZ-T?
ISL43L420IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L420IRZ-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 ISL43L420IRZ-T?
For technical support, including ISL43L420IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L420IRZ-T requirements.
6.How does Aetrix verify that ISL43L420IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL43L420IRZ-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 ISL43L420IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL43L420IRZ-T?
All ISL43L420IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L420IRZ-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 ISL43L420IRZ-T part is unused and in its original packaging.
Return procedure for ISL43L420IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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