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Renesas ISL43L840IRZ
- Part No.:
- ISL43L840IRZ
- Manufacturer:
- Renesas
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
ISL43L840IRZ.pdf
- Description:
- IC SWITCH SP4T X 2 750MOHM 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,261
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Product details
Overview
ISL43L840IRZ from Intersil is a dual 4-to-1 analog multiplexer/demultiplexer IC designed for low-voltage, single-supply operation (1.6V to 3.6V), featuring 0.5Ω ON resistance at +3V, 19ns switching time, and rail-to-rail analog signal handling in portable audio/video routing and battery-powered medical instrumentation.
For engineers reviewing the ISL43L840IRZ datasheet, ISL43L840IRZ pinout, ISL43L840IRZ application, or ISL43L840IRZ equivalent, key selection criteria include guaranteed break-before-make timing, 0.12Ω RON matching between channels, 65dB off isolation at 100kHz, and compatibility with 1.8V logic inputs under +3V supply conditions.
Technical Context
The ISL43L840IRZ implements two independent 4:1 analog multiplexers using submicron CMOS process technology, each with dedicated address inputs (ADDA0/1 and ADDB0/1) and separate common outputs (COMA and COMB). Its internal level shifters translate 1.8V-compatible digital logic into full-rail analog switch gate drive signals.
It guarantees break-before-make operation (tBBM = 4ns typ at +3V), supports ±300mA continuous current per channel, and maintains <0.2µW power dissipation due to ultra-low quiescent supply current (0.05µA typ at +3.6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Dual 4:1 analog multiplexer with independent COMA/COMB outputs and address control |
| ON Resistance (RON) | 0.5Ω at +3V supply - enables minimal signal attenuation in precision analog paths |
| RON Matching | 0.12Ω max - ensures consistent gain and channel-to-channel signal integrity |
| Switching Time (tTRANS) | 19ns at +3V - supports high-speed data acquisition and multiplexed sensor readouts |
| Analog Signal Range | Rail-to-rail (0V to V+) - preserves full dynamic range of baseband audio and biomedical signals |
| Off-Leakage Current | 4nA max at +25°C - critical for low-drift front-end circuits in portable ECG and glucose monitors |
| Logic Compatibility | 1.8V CMOS input thresholds (VINH ≥ 1.4V, VINL ≤ 0.5V at +3V) - interfaces directly with modern low-voltage microcontrollers |
Pinout & Package
ISL43L840IRZ is packaged in a 16-lead 3×3 mm QFN (L16.3x3) with exposed thermal pad connected to GND. Pin 1 is located at the top-left corner adjacent to the index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 1.6V–3.6V single supply; powers analog switches and internal logic |
| GND | Ground reference | Common return for analog signals, digital inputs, and thermal pad |
| COMA / COMB | Analog output terminals | Common nodes for respective 4:1 muxes; support rail-to-rail signal swing |
| A0–A3 / B0–B3 | Analog input channels | Eight independent analog inputs routed to COMA or COMB based on address state |
| ADDA0/1 / ADDB0/1 | Digital address inputs | Binary-select lines determining active A/B channel; 1.8V logic compatible at +3V supply |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | 4ns typical tBBM prevents momentary shorting during channel switching in audio path routing |
| RON flatness | 0.056Ω over full signal range - minimizes harmonic distortion in audio and sensor signals |
| Charge injection | −96pC at +3V - reduces glitch-induced settling errors in precision ADC front-ends |
| Off isolation | 65dB at 100kHz - suppresses crosstalk between active and inactive analog channels |
| Pb-free RoHS compliance | Matte tin termination and MSL3-rated package - supports lead-free reflow assembly without reliability compromise |
Applications
| Portable Audio Routing | Medical Sensor Multiplexing |
|---|---|
Use Scenario: Switching between multiple microphone inputs and headphone outputs in Bluetooth headsets and voice-controlled wearables. IC Role / Device Role / Timing Role: Dual 4:1 analog multiplexer enabling bidirectional audio path selection with simultaneous mic/headphone channel management. Use Value: 0.5Ω RON and 0.056Ω RON flatness preserve SNR >95dB across 20Hz–20kHz bandwidth. | Use Scenario: Selecting among ECG, SpO₂, and temperature sensor channels in handheld patient monitors. IC Role / Device Role / Timing Role: Low-leakage analog switch providing isolated signal paths for high-impedance biopotential electrodes. Use Value: 4nA max off-leakage at +25°C ensures baseline drift <1µV/s in DC-coupled front-ends. |
| Battery-Powered Test Equipment | Mobile Phone Peripheral Switching |
Use Scenario: Channel selection in handheld multimeters and oscilloscope probes with auto-ranging analog front-ends. IC Role / Device Role / Timing Role: Precision analog multiplexer supporting programmable gain amplifier (PGA) input configuration and reference voltage routing. Use Value: 19ns tTRANS and 65dB off isolation enable accurate 100ksps sampling without inter-channel interference. | Use Scenario: Routing camera sensors, touch controllers, and USB interface signals in compact smartphone PCB layouts. IC Role / Device Role / Timing Role: Low-voltage analog switch managing shared I/O resources between baseband processor and peripheral ICs. Use Value: Single 1.8V–3.3V supply operation eliminates need for level-shifting circuitry, reducing BOM count by 3 components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMUX1308RTER | Single 8:1 mux (vs dual 4:1); 0.75Ω RON at 3.3V; no guaranteed break-before-make | Requires redesign for dual-output topology; higher RON increases THD in audio paths | Select only if board space constraints favor single-package integration and break-before-make is not required |
| ADG732BRUZ | 32-channel single-ended mux; 4.5Ω RON at 3V; 16-bit resolution support but higher leakage (20nA) | Over-specified channel count; unsuitable for low-leakage medical sensing due to 5× higher off-current | Prefer only for high-channel-count industrial DAQ where RON and leakage are secondary to density |
Compared with TMUX1308RTER and ADG732BRUZ, the ISL43L840IRZ delivers superior channel matching (0.12Ω vs >1Ω), lower leakage (4nA vs >20nA), and guaranteed break-before-make-making it optimal for dual-path, low-distortion, battery-sensitive designs.
Availability
ISL43L840IRZ is available at Aetrix Electronics and suitable for portable medical devices, battery-powered test equipment, and mobile audio subsystems requiring stable component supply across extended production lifecycles.
Supply support for ISL43L840IRZ 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 ISL43L840IRZ belongs to Intersil's ultra-low-RON analog switch family, engineered specifically for energy-constrained portable systems demanding rail-to-rail signal fidelity and sub-1Ω conduction loss.
FAQ
What is the maximum supply voltage rating for the ISL43L840IRZ?
The ISL43L840IRZ has an absolute maximum V+ to GND rating of −0.3V to +4.7V. Its recommended operating range is +1.6V to +3.6V. Exceeding +4.7V risks permanent damage due to internal ESD diode forward conduction, as confirmed in the Absolute Maximum Ratings table on page 3 of FN6096 Rev 1.00.
Does the ISL43L840IRZ support rail-to-rail analog signal switching?
Yes, the ISL43L840IRZ supports rail-to-rail analog signal switching across its full specified supply range (1.6V to 3.6V), as explicitly stated in the "Analog Signal Range" parameter (0V to V+) on pages 3 and 6 of FN6096 Rev 1.00. This allows full utilization of the signal swing in battery-powered audio and sensor interfaces.
Is the ISL43L840IRZ pin-compatible with the ISL43L840IVZ in TSSOP package?
No, the ISL43L840IRZ (3×3 mm QFN) and ISL43L840IVZ (TSSOP) share identical functionality and pin functions but differ in physical layout and thermal pad configuration. The QFN uses bottom-exposed GND pad and 0.5mm pitch; TSSOP uses gull-wing leads and 0.65mm pitch. PCB redesign is required for package substitution.
What is the guaranteed break-before-make time for the ISL43L840IRZ?
The ISL43L840IRZ guarantees a break-before-make time (tBBM) of 1ns minimum and 4ns typical at +3.3V supply, as specified in the Electrical Specifications table on page 3 of FN6096 Rev 1.00. This prevents signal shorting during channel transitions in sensitive analog routing applications.
Can the ISL43L840IRZ operate with a 1.8V supply while maintaining 1.8V logic compatibility?
Yes, the ISL43L840IRZ operates with a +1.8V supply and retains 1.8V logic compatibility: VINH is guaranteed ≥1.0V and VINL ≤0.4V per the 1.8V Electrical Specifications table on page 4 of FN6096 Rev 1.00, ensuring reliable interface with 1.8V microcontrollers without external level shifters.
ISL43L840IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 750mOhm
- Channel-to-Channel Matching (ΔRon):
- 120mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -96pC
- Channel Capacitance (CS(off), CD(off)):
- 62pF
- Current - Leakage (IS(off)) (Max):
- 4nA
- Crosstalk:
- -100dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
ISL43L840IRZ FAQ
1.How can I place an order for ISL43L840IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L840IRZ 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 ISL43L840IRZ reliable?
The price and inventory of ISL43L840IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L840IRZ is usually 5 days.
3.What payment methods are accepted for ISL43L840IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L840IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L840IRZ?
ISL43L840IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L840IRZ 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 ISL43L840IRZ?
For technical support, including ISL43L840IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L840IRZ requirements.
6.How does Aetrix verify that ISL43L840IRZ is sourced from the original manufacturer or authorized distributors?
All ISL43L840IRZ 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 ISL43L840IRZ meets industry standards.
7.What is the process for return or replacement of ISL43L840IRZ?
All ISL43L840IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L840IRZ, 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 ISL43L840IRZ part is unused and in its original packaging.
Return procedure for ISL43L840IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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