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Renesas ISL43240IA
- Part No.:
- ISL43240IA
- Manufacturer:
- Renesas
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ISL43240IA.pdf
- Description:
- IC SWITCH SPDT X 4 25OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,136
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Product details
Overview
ISL43240IA from Intersil is a low-voltage, quad SPDT analog switch operating from single +2V to +12V or dual ±2V to ±6V supplies, delivering 18Ω rON (±5V), 52ns tON/40ns tOFF, and <5nA leakage at +85°C - deployed in portable medical ultrasound front-ends and battery-powered RF "Tee" switching.
For engineers reviewing the ISL43240IA datasheet, ISL43240IA pinout, ISL43240IA application, or ISL43240IA equivalent, this page delivers verified package mapping (20 Ld SSOP), channel-matched rON flatness (<5Ω), guaranteed break-before-make timing, ESD robustness (>2kV), and TTL/CMOS logic compatibility - all critical for high-fidelity analog multiplexing in space-constrained designs.
Technical Context
The ISL43240IA integrates four independent CMOS SPDT switches with level-shifted digital control, enabling operation across bipolar and single-supply configurations without external biasing. Its internal architecture isolates analog signal paths from GND, supporting rail-to-rail analog voltage ranges up to V+–V−.
Each switch features matched transistor pairs ensuring <1Ω rON matching between channels and <5Ω rON flatness over full signal swing, while charge injection is limited to 5pC max - preserving signal integrity in precision gain-switching networks and high-speed multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rON (±5V) | 18Ω typical - enables low insertion loss in 50Ω RF Tee switch and audio routing paths |
| tON/tOFF (±5V) | 52ns/40ns - supports >10MHz multiplexing in ATE and ultrasound beamforming |
| Leakage (max, +85°C) | 2.5nA - ensures minimal DC error in high-impedance sensor front-ends and DAC/ADC interfaces |
| Charge Injection | 5pC max - prevents step-induced glitches in precision op-amp gain networks |
| Off Isolation | 71dB at 1MHz - suppresses crosstalk between differential channels in medical ECG systems |
| ESD Protection | 2000V per MIL-STD-883 Method 3015.7 - sustains handling in uncontrolled assembly environments |
| Supply Range | Single +2V to +12V or dual ±2V to ±6V - accommodates Li-ion, 3.3V, 5V, and 12V industrial rails |
Pinout & Package
ISL43240IA is packaged in a 20-lead SSOP (M20.209) with exposed pad thermal enhancement. Pin functions are validated per FN6036 Rev 3.00, Page 2 top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Drives analog switch gates and internal logic; sets upper analog signal limit (up to +12V) |
| V- | Negative supply input | Drives analog switch gates; tied to GND for single-supply use; sets lower analog limit (down to –6V) |
| GND | Ground reference | Reference for digital inputs only; no connection to analog signal path |
| IN1–IN4 | Digital control inputs | TTL/CMOS-compatible (0.8V/2.4V thresholds); each independently controls one SPDT switch |
| COM1–COM4 | Analog common terminals | Signal input/output node per switch; supports bidirectional analog routing |
| NO1–NO4 | Normally open analog outputs | Connected to COM when IN = HIGH; used for active-path selection in 4:1 mux configurations |
| NC1–NC4 | Normally closed analog outputs | Connected to COM when IN = LOW; enables break-before-make switching with guaranteed 10ns min delay |
| N.C. | No internal connection | Pin 16 (SSOP) - unused; must be left floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPDT configuration | Enables flexible reconfiguration as four independent 2:1 muxes, one 4:1 mux, or dual differential 2-channel muxes |
| rON flatness ≤5Ω | Maintains consistent signal amplitude across full analog input range - critical for ultrasound echo fidelity |
| Break-before-make guarantee | Prevents momentary shorting between NO and NC paths - essential for protecting sensitive DAC outputs |
| Low 5µW power consumption | Extends battery life in handheld barcode scanners and portable ECG devices without thermal derating |
| 10pF OFF capacitance | Minimizes high-frequency feedthrough in RF Tee applications up to 200MHz |
Applications
| Ultrasound Beamforming Front-End | Portable ECG Signal Routing |
|---|---|
Use Scenario: Multiplexing 16–64 transducer element signals into fewer ADC channels with minimal distortion. IC Role / Device Role / Timing Role: Quad SPDT switch configured as two independent 2-channel differential muxes, selecting transmit/receive paths per channel pair. Use Value: 71dB off-isolation and <5pC charge injection prevent cross-channel interference and baseline shift during fast switching. |
Use Scenario: Routing differential lead signals (RA/LA/LL) to programmable-gain instrumentation amplifiers in compact wearable monitors. IC Role / Device Role / Timing Role: Precision analog switch providing rail-to-rail signal pass-through with <2.5nA leakage at body temperature. Use Value: Ultra-low leakage preserves microvolt-level ECG amplitudes; 18Ω rON avoids gain error in PGA feedback networks. |
| RF "Tee" Switch for 2.4GHz ISM Band | +3.3V DAC Output Multiplexing |
Use Scenario: Bidirectional RF path selection between antenna and transceiver IC in Bluetooth/Wi-Fi modules. IC Role / Device Role / Timing Role: Single-pole/double-throw switch implementing low-loss "Tee" topology with matched impedance paths. Use Value: 10pF OFF capacitance and 50Ω system compatibility enable >200MHz flat frequency response per Figure 19. |
Use Scenario: Selecting between multiple 12-bit DAC outputs driving different analog subsystems (e.g., motor control vs. sensor calibration). IC Role / Device Role / Timing Role: High-speed analog multiplexer with 64ns tON at 3.3V, synchronized to digital controller clock. Use Value: 51Ω rON at 3.3V ensures <0.1% gain error; break-before-make prevents output contention during reconfiguration. |
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 ±6V dual-supply support | Limited to single 5V systems; unsuitable for ±5V ultrasound front-ends or 12V industrial muxing | Choose only for cost-sensitive 5V-only designs where speed and leakage are secondary |
| ADG1414BRUZ | Lower rON (1.8Ω @ 5V), higher supply current (120µA), requires ≥4.5V logic for full spec compliance | Better for low-distortion audio; less suitable for ultra-low-power battery operation due to 24× higher quiescent draw | Select when sub-ohm rON and THD matter more than µW-level standby power |
Compared with MAX4618ESE+ and ADG1414BRUZ, the ISL43240IA uniquely balances 18Ω rON, 5µW power, ±6V capability, and 2.5nA leakage - making it optimal for portable medical and RF systems requiring wide supply flexibility and nanoscale leakage control.
Availability
ISL43240IA is available at Aetrix Electronics and suitable for battery-powered handheld equipment, medical ultrasound front-ends, and RF "Tee" switching applications requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for ISL43240IA 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 specialist, now part of Renesas Electronics, with deep expertise in high-performance analog switching and signal conditioning ICs.
The ISL43240IA belongs to Intersil's high-speed analog switch family, engineered for low-leakage, low-rON, and rail-to-rail operation in portable, medical, and communications systems demanding signal fidelity under tight power budgets.
FAQ
What supply voltage ranges does the ISL43240IA support?
The ISL43240IA operates from a single +2V to +12V supply or dual ±2V to ±6V supplies. At ±5V, it achieves 18Ω rON and 52ns/40ns switching; at +3.3V, rON rises to 51Ω with 120ns/50ns timing. The 15V absolute maximum rating accommodates 12V supply overshoot and noise margins - confirmed in Absolute Maximum Ratings on page 3 of FN6036 Rev 3.00.
Does the ISL43240IA provide guaranteed break-before-make switching?
Yes, the ISL43240IA guarantees break-before-make operation with a minimum 10ns delay (tD) between NC opening and NO closing, validated per Figure 3 test circuit and electrical specs on page 3. This prevents signal shorting in gain-switching networks and protects sensitive DAC outputs - a key differentiator versus non-guaranteed analog switches.
How does the ISL43240IA handle logic-level compatibility across supply voltages?
The ISL43240IA maintains TTL/CMOS compatibility across its full supply range: VINH = 2.4V min (at +5V), rising to 3.0V min at +12V; VINL remains 0.8V max. Internal level shifters referenced to V+ and GND ensure reliable switching regardless of V− setting - detailed in Logic-Level Thresholds section, page 9 of FN6036 Rev 3.00.
What is the maximum analog signal bandwidth supported by the ISL43240IA?
The ISL43240IA maintains flat frequency response beyond 200MHz in 50Ω systems (Figure 19), with off-isolation >50dB at 10MHz. Its 10pF OFF capacitance and 30pF COM ON capacitance minimize feedthrough - enabling use in RF "Tee" switching up to 2.4GHz ISM band when combined with proper PCB layout and impedance control.
Is the ISL43240IA RoHS compliant and moisture-sensitive?
Yes, the ISL43240IA is Pb-free and RoHS compliant (per Ordering Information, page 2). It carries Moisture Sensitivity Level (MSL) 1 per JEDEC J-STD-020 - meaning unlimited floor life at ≤30°C/60% RH, eliminating bake requirements before reflow. This is confirmed in Notes 3 and 4 of the datasheet.
ISL43240IA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Bag
- 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-SSOP
ISL43240IA FAQ
1.How can I place an order for ISL43240IA through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43240IA 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 ISL43240IA reliable?
The price and inventory of ISL43240IA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43240IA is usually 5 days.
3.What payment methods are accepted for ISL43240IA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43240IA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43240IA?
ISL43240IA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43240IA 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 ISL43240IA?
For technical support, including ISL43240IA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43240IA requirements.
6.How does Aetrix verify that ISL43240IA is sourced from the original manufacturer or authorized distributors?
All ISL43240IA 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 ISL43240IA meets industry standards.
7.What is the process for return or replacement of ISL43240IA?
All ISL43240IA units undergo pre-shipment inspection (PSI). If there is an issue with ISL43240IA, 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 ISL43240IA part is unused and in its original packaging.
Return procedure for ISL43240IA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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