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Renesas ISL84781IV
- Part No.:
- ISL84781IV
- Manufacturer:
- Renesas
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL84781IV.pdf
- Description:
- IC MUX 8:1 750MOHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,314
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Product details
Overview
ISL84781IV from Renesas Electronics is an ultra-low ON-resistance, single-supply 8-to-1 analog multiplexer configured as a bidirectional precision switch. It operates from +1.6V to +3.6V, delivers 0.4 Ω rON at +3.0V, supports rail-to-rail analog signals up to ±300 mA continuous, and features guaranteed break-before-make switching for signal integrity in portable audio routing and battery-powered instrumentation.
For engineers reviewing the ISL84781IV datasheet, ISL84781IV pinout, ISL84781IV application, or ISL84781IV equivalent, this device is selected for low-voltage signal path control where sub-0.5 Ω channel resistance, <25 ns switching, 4 nA off-leakage at +25°C, and 1.8V logic compatibility with +3V supply are critical design requirements.
Technical Context
The ISL84781IV implements a CMOS-based 8:1 analog multiplexer architecture with integrated level shifters enabling 1.8V logic-compatible digital inputs (ADD0–ADD2, INH) while operating from a single 1.6V–3.6V supply. Its internal switch array uses matched transistor pairs to achieve 0.12 Ω rON matching and 0.056 Ω rON flatness across the full signal range.
Each channel provides rail-to-rail analog conduction, guaranteed break-before-make timing (≥1 ns min), and high-frequency performance with 65 dB off-isolation at 100 kHz and –3 dB bandwidth of 52 MHz in 50 Ω systems. Charge injection is limited to –39 pC typical at +3V, supporting precision sampling in low-distortion audio paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rON @ +3.0V | 0.4 Ω - Enables minimal voltage drop and power loss in low-voltage signal chains (e.g., 300 mA load yields only 120 mV drop) |
| rON Matching | 0.12 Ω max - Ensures consistent gain and channel-to-channel crosstalk suppression in multi-path routing |
| tON/tOFF | 16 ns / 13 ns @ +3V - Supports high-speed data acquisition and real-time audio switching without timing skew |
| Off-Leakage @ +25°C | ±4 nA - Preserves accuracy in high-impedance sensor interfaces and battery-monitoring circuits |
| Analog Signal Range | Rail-to-rail (0 V to V+) - Allows full utilization of supply headroom in single-supply portable systems |
| Logic Compatibility | 1.8V CMOS inputs @ +3V supply - Interfaces directly with modern low-voltage microcontrollers without level-shifting |
| Supply Range | +1.6V to +3.6V - Supports operation down to near-dead battery levels in handheld equipment |
Pinout & Package
ISL84781IV is packaged in a 16-lead TSSOP (M16.173) with exposed pad not internally connected. Pin functions are validated per Renesas FN6095 Rev 4.01.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Supplies internal CMOS switches and level shifters; accepts 1.6V–3.6V; absolute max 4.7V |
| GND | Ground reference | Return path for analog and digital circuitry; must be low-impedance for leakage and noise control |
| COM | Common analog terminal | Single output node shared across all 8 channels; handles ±300 mA continuous current |
| NO0–NO7 | Normally open analog inputs | Eight independent bidirectional analog signal paths; each supports rail-to-rail voltage swing |
| ADD0–ADD2 | 3-bit binary address inputs | Selects one of eight NOx channels to connect to COM; logic thresholds: 0.5V/1.4V @ +3V |
| INH | Inhibit control input | High = all switches open; low = normal operation; enables global signal path disable |
| N.C. | No-connect terminal | Not internally bonded; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ON-resistance | 0.4 Ω @ +3V ensures minimal insertion loss and thermal drift in precision analog paths |
| Guaranteed break-before-make | ≥1 ns minimum tBBM prevents momentary shorting during channel transitions in audio or sensor muxing |
| Low charge injection | –39 pC typical minimizes voltage glitch on high-impedance nodes during switching |
| 1.8V logic compatibility | Validated VINH/VINL thresholds (1.4V/0.5V) allow direct interface with 1.8V I/O microcontrollers |
| Pb-free RoHS compliance | Matte tin termination and MSL-1 reflow profile support automated assembly in lead-free manufacturing |
Applications
| Portable Audio Routing | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Switching microphone inputs, headphone outputs, or DAC/ADC paths in smartphones and wireless earbuds. IC Role / Device Role / Timing Role: 8:1 analog multiplexer providing low-distortion, low-noise signal selection with <25 ns settling. Use Value: 0.4 Ω rON and 0.014% THD preserve audio fidelity; 4 nA leakage avoids DC offset in sensitive preamp stages. |
Use Scenario: Multiplexing multiple sensor outputs (thermocouples, strain gauges) into a single ADC in handheld test meters. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with matched channel resistance and low charge injection. Use Value: 0.12 Ω rON matching reduces gain error between channels; rail-to-rail range accommodates unbuffered sensor signals. |
| Medical Vital Sign Monitoring | Low-Voltage Data Acquisition |
Use Scenario: Routing ECG, SpO₂, and temperature sensor signals in portable patient monitors with strict power budgets. IC Role / Device Role / Timing Role: Low-power analog multiplexer enabling selective signal conditioning before digitization. Use Value: 0.2 µW quiescent power and 1.6V minimum supply extend battery life; 65 dB off-isolation suppresses cross-talk between biopotential channels. |
Use Scenario: Channel selection in compact, battery-operated data loggers acquiring from multiple analog sensors over extended periods. IC Role / Device Role / Timing Role: High-reliability analog switch supporting long-term stability and low thermal EMF in measurement front-ends. Use Value: 70 nA max leakage at +85°C maintains accuracy in high-Z sensor interfaces; Pb-free packaging ensures regulatory compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4781ESE+ | Pin-compatible but higher rON (0.8 Ω typ @ +3V); no guaranteed break-before-make; 16-pin SOIC only | Limited to industrial-grade temp range (–40°C to +85°C same); less suitable for precision audio due to higher distortion | Choose MAX4781ESE+ only if legacy SOIC footprint is required and rON tolerance >0.4 Ω is acceptable |
| ISL43L680IR | Discontinued predecessor; 0.5 Ω rON @ +3V; identical pinout and function but lower production reliability and no updated MSL rating | Same portable medical and test equipment use cases, but lacks Renesas' enhanced ESD robustness (>4 kV HBM) | ISL84781IV replaces ISL43L680IR with improved specs and RoHS-compliant packaging-preferred for new designs |
Compared with MAX4781ESE+ and ISL43L680IR, the ISL84781IV delivers superior rON, guaranteed break-before-make, lower leakage, and dual-package availability-making it optimal for next-generation portable instrumentation requiring signal integrity and long-term supply continuity.
Availability
ISL84781IV is available at Aetrix Electronics and suitable for portable audio routing, battery-powered instrumentation, medical vital sign monitoring, and low-voltage data acquisition requiring stable component supply across industrial and consumer OEM programs.
Supply support for ISL84781IV 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
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT applications.
The ISL84781IV belongs to Renesas' precision analog switch product line, engineered for ultra-low rON and fast switching in space-constrained, battery-sensitive systems such as handheld medical devices and portable test equipment.
FAQ
What is the maximum supply voltage rating for the ISL84781IV?
The ISL84781IV has an absolute maximum V+ rating of 4.7 V, with recommended operating range from +1.6 V to +3.6 V. This margin accommodates 10% supply tolerance and transient overshoot on nominal 3.3 V rails. Exceeding 4.7 V risks permanent damage to internal ESD diodes and switch transistors. Always ensure V+ is applied before analog or digital signals to prevent forward-biasing protection diodes.
Does the ISL84781IV support rail-to-rail analog signal operation?
Yes, the ISL84781IV supports true rail-to-rail analog signal conduction from 0 V to V+ on all NOx and COM terminals. This capability is maintained across its full +1.6V to +3.6V supply range and enables direct interfacing with unbuffered sensors, audio codecs, and ADC/DACs without external level-shifting circuitry.
What is the purpose of the INH pin on the ISL84781IV?
The INH (Inhibit) pin on the ISL84781IV provides global control to simultaneously open all eight analog switches. When pulled high to V+, all channels disconnect regardless of ADD0–ADD2 state-enabling system-level signal isolation during sleep mode or fault conditions. Pulling INH low enables normal address-controlled switching. Input thresholds are 0.5 V (low) and 1.4 V (high) at +3 V supply.
How does the ISL84781IV handle charge injection during switching?
The ISL84781IV limits charge injection to –39 pC typical at +3 V, measured with 1 nF load and 0 Ω source impedance. This low value minimizes voltage glitches on high-impedance nodes (e.g., sample-and-hold capacitors), preserving accuracy in precision data acquisition. Performance degrades slightly at lower supplies: –20 pC typical at +1.8 V.
Is the ISL84781IV pin-compatible with the MAX4781?
Yes, the ISL84781IV is explicitly documented as a pin-compatible replacement for the MAX4781. Both share identical 16-pin TSSOP and QFN footprints, matching pin functions (V+, GND, COM, NO0–NO7, ADD0–ADD2, INH, N.C.), and compatible logic thresholds. However, ISL84781IV improves rON (0.4 Ω vs. 0.8 Ω), adds guaranteed break-before-make, and offers dual-package support.
ISL84781IV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- 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):
- 25ns, 23ns
- -3db Bandwidth:
- -
- Charge Injection:
- -39pC
- Channel Capacitance (CS(off), CD(off)):
- 65pF, 470pF
- Current - Leakage (IS(off)) (Max):
- 4nA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
ISL84781IV FAQ
1.How can I place an order for ISL84781IV through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL84781IV 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 ISL84781IV reliable?
The price and inventory of ISL84781IV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL84781IV is usually 5 days.
3.What payment methods are accepted for ISL84781IV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL84781IV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL84781IV?
ISL84781IV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL84781IV 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 ISL84781IV?
For technical support, including ISL84781IV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL84781IV requirements.
6.How does Aetrix verify that ISL84781IV is sourced from the original manufacturer or authorized distributors?
All ISL84781IV 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 ISL84781IV meets industry standards.
7.What is the process for return or replacement of ISL84781IV?
All ISL84781IV units undergo pre-shipment inspection (PSI). If there is an issue with ISL84781IV, 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 ISL84781IV part is unused and in its original packaging.
Return procedure for ISL84781IV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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