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Renesas ISL84781IRZ-T
- Part No.:
- ISL84781IRZ-T
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL84781IRZ-T.pdf
- Description:
- IC MUX 8:1 750MOHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,283
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Product details
Overview
ISL84781IRZ-T from Renesas Electronics is an ultra-low ON-resistance, single-supply, 8-to-1 analog multiplexer configured as a bidirectional analog switch IC. It operates from +1.6V to +3.6V, delivers 0.4Ω rON at +3.0V, supports rail-to-rail analog signals, and features guaranteed break-before-make switching for audio routing in portable medical devices.
For engineers reviewing the ISL84781IRZ-T datasheet, ISL84781IRZ-T pinout, ISL84781IRZ-T application, or ISL84781IRZ-T equivalent, key selection criteria include its 16ns tON/13ns tOFF at 3V, 0.12Ω rON matching across channels, 4nA max off-leakage at +25°C, and compatibility with 1.8V logic inputs under +3V supply.
Technical Context
The ISL84781IRZ-T implements a CMOS-based 8:1 analog multiplexer architecture with integrated level shifters that translate 1.8V-compatible digital address and inhibit inputs into full-rail gate drive signals for internal transmission gates. Its submicron process enables ultra-low rON and flat rON (0.056Ω) over the full signal range.
It features a dedicated INH pin that simultaneously opens all eight switch paths, supports continuous 300mA per channel, and guarantees break-before-make timing (≥1ns) to prevent signal shorting during channel transitions - critical for high-fidelity audio and precision sensor signal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| rON @ +3.0V | 0.4Ω - Enables minimal voltage drop and signal distortion in low-voltage audio and sensor front-ends. |
| rON Matching | 0.12Ω - Ensures consistent gain and channel-to-channel crosstalk control in multi-path signal conditioning. |
| tON/tOFF | 16ns/13ns @ +3V - Supports high-speed data acquisition and real-time signal switching up to ~52MHz bandwidth. |
| Supply Range | +1.6V to +3.6V - Allows direct integration with Li-ion battery systems (2.7–3.6V nominal) without regulation. |
| Off-Leakage Current | 4nA max @ +25°C - Preserves accuracy in high-impedance medical sensor interfaces and precision ADC front-ends. |
| Digital Input Compatibility | 1.8V CMOS logic @ +3V supply - Eliminates need for level shifters when interfacing with modern low-voltage microcontrollers. |
| Break-Before-Make | Guaranteed ≥1ns - Prevents momentary short-circuit between selected analog sources during address transitions. |
Pinout & Package
ISL84781IRZ-T is packaged in a 16-lead 3×3 mm thin QFN (RoHS-compliant, exposed paddle). Pin functions are validated per Renesas FN6095 Rev 4.01 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Supplies power to internal CMOS switches and level shifters; accepts 1.6–3.6V; max rating 4.7V. |
| GND | Ground reference | Return path for analog and digital circuitry; must be low-impedance for leakage and noise control. |
| INH | Inhibit control input | Active-high logic: drives all switches OFF when pulled to V+; connects to GND for normal operation. |
| COM | Common analog terminal | Single output node shared across all 8 switched inputs; handles ±300mA continuous current. |
| NO0–NO7 | Normally-open analog inputs | Eight independent bidirectional analog signal paths; each supports rail-to-rail voltage swing (0V to V+). |
| ADD0–ADD2 | 3-bit binary address inputs | Selects one of eight NOx inputs to connect to COM; logic thresholds: VIL ≤ 0.5V, VIH ≥ 1.4V @ 3V. |
| N.C. | No-connect terminal | Internally unconnected; must be left floating or tied to GND per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low rON flatness | 0.056Ω variation across full analog signal range - maintains linearity and THD < 0.014% in audio paths. |
| Guaranteed break-before-make | ≥1ns minimum dead time - eliminates cross-conduction risk in multi-source analog mux applications. |
| Low power consumption | <0.2µW quiescent - extends battery life in always-on portable diagnostics and handheld test equipment. |
| High off-isolation | 65dB @ 100kHz - suppresses crosstalk between inactive channels in dense multi-signal routing systems. |
| Charge injection | −39pC @ +3V - minimizes transient glitches in precision sampling circuits and switched-capacitor filters. |
Applications
| Portable Medical Monitoring | Smartphone Audio Routing |
|---|---|
Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor analog outputs to a single ADC in a wearable health patch. IC Role / Device Role / Timing Role: 8:1 analog multiplexer providing low-distortion, low-leakage signal selection with rail-to-rail support for varying sensor output ranges. Use Value: 0.4Ω rON and 4nA off-leakage preserve microvolt-level biopotential integrity; 16ns switching enables synchronized multi-parameter sampling. |
Use Scenario: Routing microphone, headset, speaker, and codec signals among multiple audio peripherals in a dual-SIM smartphone. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling flexible audio path reconfiguration under processor control via ADD0–ADD2. Use Value: 1.8V logic compatibility eliminates level-shifter components; 65dB off-isolation prevents audible crosstalk between mic and speaker paths. |
| Handheld Test Equipment | Battery-Powered Data Loggers |
Use Scenario: Scanning thermocouple, RTD, and voltage inputs into a precision 24-bit sigma-delta ADC in a field multimeter. IC Role / Device Role / Timing Role: Low-rON, low-charge-injection multiplexer ensuring accurate cold-junction compensation and minimal settling error. Use Value: 0.12Ω rON matching reduces channel-dependent gain errors; −39pC charge injection limits step-induced ADC offset drift. |
Use Scenario: Selecting among multiple environmental sensors (humidity, pressure, gas) for sequential readout in a solar-powered remote logger. IC Role / Device Role / Timing Role: Ultra-low-power analog switch enabling long-term operation on coin-cell or supercapacitor energy storage. Use Value: <0.2µW supply current and 40nA max off-leakage at +85°C minimize standby drain; 1.6V min supply supports direct supercap operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4781ETE+ | Pin-compatible but higher rON (0.8Ω @ 3V), slower tON/tOFF (25ns/20ns), no guaranteed break-before-make. | Less suitable for high-fidelity audio or precision sensor muxing where rON matching and glitch-free switching are critical. | Choose MAX4781ETE+ only if legacy footprint reuse is mandatory and performance margins allow higher rON and timing uncertainty. |
| TMUX1308RTER | Lower supply range (1.08–3.6V), higher rON (0.9Ω @ 3V), 1.2µA I+, no 1.8V logic guarantee at 3V supply. | Better for ultra-low-voltage systems (<1.6V), but less optimal for battery-powered 3V designs requiring minimal distortion and leakage. | Prefer TMUX1308RTER when operating below 1.6V or when TI's production availability outweighs Renesas' rON and leakage advantages. |
Compared with MAX4781ETE+ and TMUX1308RTER, the ISL84781IRZ-T offers the lowest rON and tightest rON matching in its voltage class, combined with guaranteed break-before-make and industry-leading off-leakage - making it optimal for high-accuracy, low-power portable instrumentation.
Availability
ISL84781IRZ-T is available at Aetrix Electronics and suitable for portable medical monitoring, smartphone audio routing, handheld test equipment, battery-powered data loggers, and precision sensor interface applications requiring stable component supply across extended product lifecycles.
Supply support for ISL84781IRZ-T 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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with deep expertise in analog, mixed-signal, and power management ICs.
The ISL84781IRZ-T belongs to Renesas' high-performance analog switch portfolio, designed specifically for ultra-low-voltage, low-distortion signal routing in space-constrained, battery-sensitive portable electronics.
FAQ
What is the maximum supply voltage rating for the ISL84781IRZ-T?
The ISL84781IRZ-T has an absolute maximum V+ to GND rating of 4.7V. This provides margin above its 3.6V operational upper limit, accommodating supply overshoot and noise spikes in battery-powered systems. Operation beyond 3.6V voids guaranteed specifications and risks permanent damage.
Does the ISL84781IRZ-T support rail-to-rail analog signal switching?
Yes, the ISL84781IRZ-T supports rail-to-rail analog signal switching - its analog inputs (NO0–NO7) and common terminal (COM) handle signals from 0V to V+, fully compatible with the device's 1.6V to 3.6V supply range. This ensures no clipping or distortion when routing full-scale sensor or audio signals.
Is the ISL84781IRZ-T pin-compatible with the MAX4781?
Yes, the ISL84781IRZ-T is explicitly documented as a pin-compatible replacement for the MAX4781 in Renesas' datasheet (FN6095 Rev 4.01, Features section). Both use identical 16-pin TSSOP and QFN footprints, same pin assignments, and share functional equivalence in address decoding, inhibit control, and analog terminal layout.
What is the guaranteed break-before-make time for the ISL84781IRZ-T?
The ISL84781IRZ-T guarantees a minimum break-before-make time of 1ns across the full operating temperature range (−40°C to +85°C), measured at V+ = 3.3V. This prevents momentary shorting between analog sources during channel transitions - a critical requirement for fault-tolerant sensor and audio routing.
Can the ISL84781IRZ-T operate from a 1.8V supply while maintaining 1.8V logic compatibility?
Yes - at V+ = 1.8V, the ISL84781IRZ-T maintains 1.8V logic compatibility: input thresholds are specified as VIL ≤ 0.4V and VIH ≥ 1.0V, aligning with standard 1.8V CMOS levels. Digital inputs (ADD0–ADD2, INH) function correctly without external level shifting.
ISL84781IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TQFN (3x3)
ISL84781IRZ-T FAQ
1.How can I place an order for ISL84781IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL84781IRZ-T 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 ISL84781IRZ-T reliable?
The price and inventory of ISL84781IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL84781IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL84781IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL84781IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL84781IRZ-T?
ISL84781IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL84781IRZ-T 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 ISL84781IRZ-T?
For technical support, including ISL84781IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL84781IRZ-T requirements.
6.How does Aetrix verify that ISL84781IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL84781IRZ-T 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 ISL84781IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL84781IRZ-T?
All ISL84781IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL84781IRZ-T, 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 ISL84781IRZ-T part is unused and in its original packaging.
Return procedure for ISL84781IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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