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Renesas ISL43240IAZ
- Part No.:
- ISL43240IAZ
- Manufacturer:
- Renesas
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ISL43240IAZ.pdf
- Description:
- IC SWITCH SPDT X 4 25OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,925
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Product details
Overview
ISL43240IAZ from Intersil is a low-voltage, quad SPDT analog switch operating from single +2V to +12V or dual ±2V to ±6V supplies, featuring 18Ω rON (±4.5V), 52ns tON/40ns tOFF, and 5nA max leakage - optimized for battery-powered portable equipment including barcode scanners and medical ultrasound front-ends.
For engineers reviewing the ISL43240IAZ datasheet, ISL43240IAZ pinout, ISL43240IAZ application, or ISL43240IAZ equivalent, this page delivers verified electrical specs, package-specific terminal mapping, real-world use-value analysis, and two validated alternative parts with documented functional trade-offs.
Technical Context
The ISL43240IAZ implements four independent CMOS SPDT switches with guaranteed break-before-make timing (≥10ns) and TTL/CMOS-compatible digital inputs. Its internal level-shifting architecture separates logic control (V+/GND referenced) from analog signal path (V+/V− bounded), enabling operation across supply voltages without signal rail dependency.
Each switch exhibits <1Ω rON matching and ≤5Ω rON flatness over full analog range, ensuring minimal gain error in precision multiplexing. Off-isolation exceeds 71dB at 1MHz and crosstalk remains ≤–92dB, supporting high-fidelity signal routing in RF tee-switch and ATE applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rON (±4.5V) | 18Ω typical - enables low insertion loss in 50Ω systems up to 200MHz |
| tON/tOFF (±4.5V) | 52ns/40ns - supports >10MHz multiplexed sampling in data acquisition |
| Leakage (INO(OFF), +85°C) | 2.5nA max - preserves DC accuracy in high-impedance sensor interfaces |
| Charge injection | 5pC max - minimizes voltage glitch in sample-and-hold and DAC output switching |
| Off isolation | 71dB at 1MHz - suppresses signal coupling between active and inactive channels |
| Crosstalk | –92dB - prevents interference in multi-channel audio/video routing |
| Supply range | +2V to +12V single or ±2V to ±6V dual - accommodates Li-ion, USB, and legacy industrial rails |
Pinout & Package
ISL43240IAZ is packaged in a 20-lead SSOP (M20.209) with exposed pad thermal enhancement. Pin functions are electrically identical across all four SPDT sections, each with dedicated IN, COM, NO, and NC terminals plus shared V+, V−, GND, and N.C. pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Bias source for analog channel transistors and logic level shifters; sets upper analog signal limit |
| V− | Negative supply input | Reference for bipolar operation; tied to GND for single-supply use; defines lower analog signal bound |
| GND | Digital ground reference | Return path for logic circuitry only; no connection to analog signal path |
| IN1–IN4 | Digital control inputs | TTL/CMOS-compatible; logic "1" ≥2.4V (V+ = 5V), "0" ≤0.8V; controls individual SPDT state |
| COM1–COM4 | Analog common terminals | Signal input/output node per switch; must remain within V− to V+ range |
| NO1–NO4 | Normally open analog outputs | Connected to COM when IN = "1"; isolated when IN = "0" |
| NC1–NC4 | Normally closed analog outputs | Connected to COM when IN = "0"; isolated when IN = "1" |
| N.C. | No internal connection | Pin 6 (SSOP); unused; must be left floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | Ensures no momentary short between NO and NC paths during switching - critical for preventing signal contention in multiplexer trees |
| 2000V ESD protection (HBM) | Enables robust handling in automated assembly and field-replaceable modules without external protection diodes |
| 5µW power consumption | Reduces standby current in always-on portable devices - extends battery life in handheld medical instruments |
| rON flatness ≤5Ω | Maintains consistent gain across full analog voltage swing - essential for linearity in ADC/DAC interface networks |
| 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 | Portable Barcode Scanner Signal Routing |
|---|---|
Use Scenario: Multiplexing multiple transducer elements to a shared receive chain while preserving signal integrity and phase coherence. IC Role / Device Role / Timing Role: Quad SPDT switch selects one of four differential transducer pairs per time slot; tON/tOFF < 65ns ensures sub-microsecond channel settling. Use Value: 71dB off-isolation prevents cross-talk between adjacent channels; <5pC charge injection avoids baseline shift in low-noise amplifiers. |
Use Scenario: Routing laser driver output or photodiode signal between scan engine optics and decoder ASIC under battery-constrained conditions. IC Role / Device Role / Timing Role: Dual 2:1 multiplexer configuration routes either emitter or detector path; 18Ω rON minimizes pulse distortion on 100ns laser pulses. Use Value: 5nA leakage preserves weak photocurrent signals; 5µW quiescent power extends scan session duration on single-cell Li-ion. |
| Laptop Audio Codec Switching | Industrial ATE Channel Multiplexing |
Use Scenario: Dynamically reconfiguring headphone, mic-in, and line-out paths in space-constrained notebook designs. IC Role / Device Role / Timing Role: Quad SPDT used as 4:1 analog mux for shared codec DAC/ADC lines; operates from +3.3V rail. Use Value: 30Ω rON at 3.3V maintains THD+N < –90dB; 10pF COFF limits high-frequency roll-off in 20kHz audio band. |
Use Scenario: Scaling test head channel count by sharing precision measurement resources across DUTs in automated test equipment. IC Role / Device Role / Timing Role: Configured as dual differential 2-channel mux to route differential sensor signals; operates from ±5V supplies. Use Value: <1Ω rON matching ensures <0.01% gain error between parallel test paths; –92dB crosstalk prevents false pass/fail due to signal bleed. |
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 |
|---|---|---|---|
| MAX4684EUB+ | Higher rON (45Ω @ 3V), slower tON (120ns), but supports wider supply (1.8V–6V) and includes fault protection | Better suited for ultra-low-voltage microcontroller I/O expansion where fault tolerance outweighs speed | Select MAX4684EUB+ if system requires overvoltage lockout and operates below 2.5V; avoid if <60ns switching is required |
| ADG1414BRUZ | Lower rON (1.8Ω @ ±15V), higher supply rating (±16.5V), but larger 24-lead TSSOP package and 10x higher power (50µW) | Preferred for high-precision instrumentation requiring sub-ohm matching and wide dynamic range | Select ADG1414BRUZ for ±15V systems needing <0.5Ω matching; ISL43240IAZ remains optimal for portable 3.3V/5V designs with thermal constraints |
Compared with MAX4684EUB+ and ADG1414BRUZ, the ISL43240IAZ delivers the best balance of speed, leakage, and power for battery-operated 3–12V systems - achieving 52ns switching at 5µW while maintaining 2.5nA leakage at +85°C, unlike alternatives that trade one parameter for another.
Availability
ISL43240IAZ is available at Aetrix Electronics and suitable for portable medical devices, handheld industrial scanners, laptop audio subsystems, and automated test equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for ISL43240IAZ 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 energy-efficient IC design.
The ISL43240IAZ belongs to Intersil's high-speed analog switch product line, engineered specifically for low-power, high-fidelity signal routing in portable and battery-sensitive applications where leakage, speed, and supply flexibility are critical.
FAQ
What supply voltage ranges does the ISL43240IAZ support?
The ISL43240IAZ operates from a single +2V to +12V supply or dual ±2V to ±6V supplies. At +3.3V, rON is 51Ω; at ±4.5V, it drops to 18Ω; at +12V, it reaches 14Ω. The device maintains guaranteed break-before-make timing and TTL-compatible logic thresholds across this full range, making ISL43240IAZ suitable for mixed-rail portable systems.
Does the ISL43240IAZ require external protection diodes for overvoltage?
No - the ISL43240IAZ integrates ESD protection diodes (≥2000V HBM) on all analog and digital pins, with internal clamping to V+ and V−. However, if analog signals may exceed V+ or fall below V−, external series resistors (e.g., 1kΩ on logic inputs) or Schottky diodes to supply rails are recommended. The ISL43240IAZ datasheet explicitly states these diodes prevent damage but do not eliminate leakage above supply rails.
How does the ISL43240IAZ handle ground-referenced signals in dual-supply mode?
In dual-supply operation (±V), the ISL43240IAZ isolates analog signal paths from GND - all analog pins (COM, NO, NC) swing between V− and V+, with no DC path to GND. This allows true bipolar signal handling (e.g., ±2.5V) without ground-loop issues. GND serves logic only; V− becomes the analog reference. This architecture is confirmed in the ISL43240IAZ pin descriptions and supply sequencing section.
What is the maximum analog signal bandwidth supported by the ISL43240IAZ?
The ISL43240IAZ maintains flat frequency response beyond 200MHz in 50Ω systems, with off-isolation >50dB at 10MHz and crosstalk <–92dB. Bandwidth is limited primarily by load impedance and PCB parasitics, not intrinsic switch capacitance (COFF = 10pF, CCOM(ON) = 30pF). For ISL43240IAZ, usable analog bandwidth exceeds 100MHz in well-designed layouts - sufficient for RF tee-switching and high-speed data acquisition.
Can the ISL43240IAZ be used as a 4:1 multiplexer?
Yes - the ISL43240IAZ's quad SPDT architecture allows configuration as a single 4:1 multiplexer by tying all four COM pins together and using external logic to decode two address bits into the four IN inputs. The datasheet explicitly lists "single 4:1 multiplexer" as a supported configuration, and its matched rON (<1Ω) and low crosstalk ensure channel-to-channel consistency critical for this topology.
ISL43240IAZ 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-SSOP
ISL43240IAZ FAQ
1.How can I place an order for ISL43240IAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43240IAZ 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 ISL43240IAZ reliable?
The price and inventory of ISL43240IAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43240IAZ is usually 5 days.
3.What payment methods are accepted for ISL43240IAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43240IAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43240IAZ?
ISL43240IAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43240IAZ 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 ISL43240IAZ?
For technical support, including ISL43240IAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43240IAZ requirements.
6.How does Aetrix verify that ISL43240IAZ is sourced from the original manufacturer or authorized distributors?
All ISL43240IAZ 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 ISL43240IAZ meets industry standards.
7.What is the process for return or replacement of ISL43240IAZ?
All ISL43240IAZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL43240IAZ, 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 ISL43240IAZ part is unused and in its original packaging.
Return procedure for ISL43240IAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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