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Renesas ISL43240IRZ
- Part No.:
- ISL43240IRZ
- Manufacturer:
- Renesas
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL43240IRZ.pdf
- Description:
- IC SWITCH SPDT X 4 25OHM 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
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Product details
Overview
ISL43240IRZ from Intersil is a CMOS quad SPDT analog switch operating from single +2V to +12V or dual ±2V to ±6V supplies, delivering 18Ω rON (±4.5V), 52ns tON/40ns tOFF switching, and <5µW power consumption - ideal for battery-powered portable instrumentation requiring high signal fidelity and low leakage.
For engineers reviewing the ISL43240IRZ datasheet, ISL43240IRZ pinout, ISL43240IRZ application, or ISL43240IRZ equivalent, this page provides verified package mapping (20 Ld QFN), channel-matched rON (<1Ω), break-before-make timing, ESD rating (>2kV), and real-world use cases in medical ultrasound front-ends and RF Tee-switching circuits.
Technical Context
The ISL43240IRZ implements four independent CMOS SPDT switches with level-shifted control logic powered by V+ and GND, enabling TTL/CMOS compatibility across supply voltages from 2.5V to 10V. Its analog path is isolated from GND, with V+ and V− defining the full signal swing range (V− to V+).
Each switch guarantees break-before-make operation (tD = 10–60ns depending on supply), exhibits <5pC charge injection at ±4.5V, and maintains >71dB off isolation and −92dB crosstalk at 1MHz - critical for high-fidelity multiplexing in precision ADC/DAC interfaces and ultrasound beamforming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rON (±4.5V) | 18Ω - ensures minimal signal attenuation and distortion in audio/video and medical analog paths |
| tON / tOFF | 52ns / 40ns - enables high-speed channel selection in ATE and digital filter gain-switching networks |
| Leakage (max, +85°C) | 2.5nA - preserves accuracy in high-impedance sensor interfaces and electrocardiograph front-ends |
| Charge injection | 5pC max - minimizes voltage glitch on sampled-hold nodes in precision data acquisition systems |
| Off isolation | 71dB at 1MHz - suppresses signal feed-through in RF Tee-switch and base station antenna routing |
| ESD protection | 2000V per MIL-STD-883 Method 3015.7 - supports robust handling in portable equipment assembly |
| Supply range | Single: +2V to +12V; Dual: ±2V to ±6V - accommodates legacy 3.3V/5V and modern low-voltage battery rails |
Pinout & Package
ISL43240IRZ is housed in a 20-lead QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin assignments are identical to the SSOP variant except for physical layout; all terminals retain functional equivalence per datasheet Figure 1 (QFN top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Sets upper analog voltage limit and powers internal logic; must be applied before signals to avoid ESD diode conduction |
| V− | Negative supply input | Sets lower analog voltage limit; tied to GND for single-supply operation; defines signal swing floor |
| GND | Ground reference | Reference for digital inputs only; no connection to analog signal path - eliminates ground-loop coupling |
| IN1–IN4 | Digital control inputs | TTL/CMOS-compatible (VIH ≥2.4V @ V+ ≤10V); drive internal level shifters to control switch states |
| COM1–COM4 | Analog common terminals | Signal entry points; each connects to either NOx or NCx based on corresponding INx logic state |
| NO1–NO4 | Normally open analog outputs | Connected to COMx when INx = HIGH; used for active-path routing in 2:1 MUX configurations |
| NC1–NC4 | Normally closed analog outputs | Connected to COMx when INx = LOW; enables default-path continuity in fail-safe designs |
| N.C. | No internal connection | Pin 6 (QFN) - unused; must be left floating or grounded per PCB layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPDT configuration | Enables four independent 2:1 analog selections or reconfiguration as dual differential 2-channel MUX without external components |
| rON flatness ≤5Ω | Maintains consistent gain and linearity across full analog signal range (V− to V+), critical for ultrasound echo amplitude integrity |
| Guaranteed break-before-make | Eliminates momentary short-circuit between NO and NC paths during switching - prevents signal corruption in RF and audio routing |
| Channel-to-channel rON mismatch <1Ω | Ensures matched gain and phase response across parallel channels in beamforming and stereo audio switching |
| Pb-free RoHS-compliant packaging | Meets IPC/JEDEC J-STD-020 MSL Level 1 reflow profile - supports lead-free manufacturing without moisture sensitivity concerns |
Applications
| Medical Ultrasound Front-End | RF "Tee" Switching |
|---|---|
Use Scenario: Multiplexing 64–128 transducer elements to limited receive channels in portable ultrasound systems. IC Role / Device Role / Timing Role: Quad SPDT analog switch selecting individual transducer element signals while preserving low-noise integrity and fast settling. Use Value: 52ns tON and <5pC charge injection prevent image ghosting and amplitude distortion during dynamic beam steering. | Use Scenario: Antenna path selection in handheld radios and small-cell base stations using RF Tee topology. IC Role / Device Role / Timing Role: High-isolation SPDT switch routing RF signals between transmit/receive paths with minimal insertion loss. Use Value: 71dB off isolation at 1MHz (scalable to 50Ω systems) suppresses Tx leakage into Rx chain, improving receiver SNR. |
| Laptop Audio/Video Routing | +3V/+5V DAC/ADC Interface |
Use Scenario: Dynamic switching of microphone inputs, speaker outputs, and HDMI/DisplayPort auxiliary channels in thin-and-light notebooks. IC Role / Device Role / Timing Role: Low-power quad analog switch managing multiple audio/video signal paths under battery-constrained conditions. Use Value: <5µW quiescent power and 2.5nA max leakage extend battery life while maintaining THD+N <−90dB in audio paths. | Use Scenario: Channel selection and gain network switching in precision data acquisition modules using 12–16-bit DACs/ADCs. IC Role / Device Role / Timing Role: Precision analog MUX providing matched rON and low charge injection for accurate sampling and calibration. Use Value: <1Ω rON matching and 5pC max charge injection ensure <0.01% gain error and <1LSB code uncertainty in calibrated systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4618ESE+ | Higher rON (45Ω @ +5V), slower tON (120ns), no dual-supply support - operates single-supply only | Less suitable for bipolar-signal medical or RF Tee applications requiring ±5V swing | Prefer ISL43240IRZ where low rON, fast switching, and dual-supply flexibility are required |
| ADG1412BRUZ | Lower rON (1.3Ω @ ±15V), higher supply voltage (±16.5V), larger 16-lead TSSOP package - no QFN option | Better for high-voltage industrial DAQ but incompatible with space-constrained portable PCBs | Choose ISL43240IRZ for compact QFN footprint and optimized 2–12V operation in portable designs |
Compared with MAX4618ESE+ and ADG1412BRUZ, the ISL43240IRZ uniquely balances ultra-low power (<5µW), QFN packaging, guaranteed break-before-make, and seamless dual/single-supply operation - making it optimal for portable medical, RF, and audio systems where size, leakage, and supply flexibility are co-critical.
Availability
ISL43240IRZ is available at Aetrix Electronics and suitable for battery-powered handheld equipment, RF communication subsystems, and medical ultrasound front-ends requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for ISL43240IRZ 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 precision analog and power management semiconductor provider, now part of Renesas Electronics, with expertise in high-performance signal conditioning and low-power interface solutions.
The ISL43240IRZ belongs to Intersil's high-speed analog switch product line, engineered specifically for portable instrumentation, medical imaging, and communications systems demanding low leakage, fast switching, and rail-to-rail analog signal handling.
FAQ
What supply configurations does the ISL43240IRZ support?
The ISL43240IRZ supports both single-supply operation (+2V to +12V with V− tied to GND) and dual-supply operation (±2V to ±6V). It is fully specified at ±4.5V, +5V, +3.3V, and +12V supply conditions, with performance parameters including rON, tON/tOFF, and leakage validated across all configurations per FN6036 Rev 3.00 datasheet Tables 1–4.
Does the ISL43240IRZ require external pull-up or pull-down resistors on its digital inputs?
No, the ISL43240IRZ digital inputs (IN1–IN4) are TTL/CMOS compatible and do not require external biasing. Input thresholds are VIH ≥2.4V (at V+ ≤10V) and VINL ≤0.8V, with input current bounded to ±1µA across temperature - confirmed in Electrical Specifications sections for ±5V, 5V, 3.3V, and 12V supply conditions in the ISL43240IRZ datasheet.
What is the maximum analog signal voltage range supported by the ISL43240IRZ?
The ISL43240IRZ supports an analog signal range from V− to V+, with absolute maximum ratings of −0.3V to +15V on V+ and −15V to +0.3V on V−. At ±4.5V supply, the full-range signal swing is −4.5V to +4.5V; at +12V single supply (V− = GND), it is 0V to +12V - verified in Analog Signal Range (VANALOG) specifications on pages 3–6 of the ISL43240IRZ datasheet.
How is thermal performance affected by the ISL43240IRZ's QFN package?
The ISL43240IRZ in 20 Ld QFN (L20.4x4) has a typical θJA of 75°C/W - significantly lower than the 150°C/W of the SSOP variant - due to its exposed thermal pad and high effective thermal conductivity mounting. This enables higher continuous current capability (30mA) and sustained operation at +85°C ambient without derating, as documented in Thermal Information on page 3 of the ISL43240IRZ datasheet.
Is the ISL43240IRZ pin-compatible with the ISL43240IAZ SSOP variant?
Yes, the ISL43240IRZ (QFN) and ISL43240IAZ (SSOP) share identical pin functions and logic behavior, though physical pin locations differ. Both use the same 20-pin numbering scheme and terminal definitions (V+, V−, GND, IN1–IN4, COM1–COM4, NO1–NO4, NC1–NC4, N.C.), enabling direct functional replacement in designs where board layout accommodates the QFN footprint - confirmed in Pin Configurations (pages 2) and Ordering Information (page 2) of the ISL43240IRZ datasheet.
ISL43240IRZ 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):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 12V
- Voltage - Supply, Dual (V±):
- ±2V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 65ns, 50ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC (Max)
- Channel Capacitance (CS(off), CD(off)):
- 10pF, 10pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -92dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
ISL43240IRZ FAQ
1.How can I place an order for ISL43240IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43240IRZ 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 ISL43240IRZ reliable?
The price and inventory of ISL43240IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43240IRZ is usually 5 days.
3.What payment methods are accepted for ISL43240IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43240IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43240IRZ?
ISL43240IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43240IRZ 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 ISL43240IRZ?
For technical support, including ISL43240IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43240IRZ requirements.
6.How does Aetrix verify that ISL43240IRZ is sourced from the original manufacturer or authorized distributors?
All ISL43240IRZ 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 ISL43240IRZ meets industry standards.
7.What is the process for return or replacement of ISL43240IRZ?
All ISL43240IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL43240IRZ, 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 ISL43240IRZ part is unused and in its original packaging.
Return procedure for ISL43240IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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