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Renesas ISL84523IV
- Part No.:
- ISL84523IV
- Manufacturer:
- Renesas
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL84523IV.pdf
- Description:
- IC SW SPST-NO/NC 100OHM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,681
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Product details
Overview
ISL84523IV from Intersil is a low-voltage, quad SPST analog switch with two normally open (NO) and two normally closed (NC) channels, enabling dual SPDT or dual 2:1 multiplexer operation. It operates from single +2V to +12V or bipolar ±2V to ±6V supplies, delivers 65Ω max RON at ±5V, 45ns tON/15ns tOFF, and <1nA leakage - ideal for battery-powered portable instrumentation and high-fidelity signal routing in medical ultrasound front-ends.
For engineers reviewing the ISL84523IV datasheet, ISL84523IV pinout, ISL84523IV application, or ISL84523IV equivalent, key selection criteria include verified break-before-make timing (20ns typ), channel-to-channel RON matching (<1Ω at ±5V), 2kV ESD rating, TTL/CMOS compatibility, and confirmed performance across 3V/5V/±5V supply configurations.
Technical Context
The ISL84523IV integrates four independently controlled CMOS analog switches on a single die, with two NO and two NC configurations implemented via dedicated internal gate drive paths. Its level-shifting logic accepts TTL/CMOS inputs referenced to V+ and GND while switching analog signals between V− and V+, supporting true rail-to-rail operation without GND reference in the signal path.
Break-before-make timing (tD = 20ns typ at ±5V) is guaranteed for the NO/NC pairs, preventing momentary shorting during state transitions. Signal integrity is preserved by low charge injection (1pC typ), high OFF isolation (>90dB at 100kHz), and minimal crosstalk (<−90dB), making it suitable for precision multiplexed ADC/DAC interfaces and RF "Tee" switching where signal feedthrough must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (±5V) | 65Ω max - ensures minimal signal attenuation and gain error in precision analog paths |
| tON/tOFF (±5V) | 45ns / 15ns - enables high-speed multiplexing up to ~10MHz without pulse distortion |
| Leakage (ICOM(OFF)) | ±1nA max at 25°C - preserves DC accuracy in high-impedance sensor and electrophysiology circuits |
| Charge Injection | 1pC typ - reduces settling error and glitch amplitude in sample-and-hold and switched-capacitor networks |
| OFF Isolation | >90dB at 100kHz - suppresses signal coupling between inactive and active channels in multi-signal systems |
| ESD Rating | 2000V per MIL-STD-883 Method 3015.7 - supports robust handling in manual assembly and field-replaceable modules |
| Supply Range | Single: +2V to +12V; Bipolar: ±2V to ±6V - accommodates Li-ion, USB, and legacy ±5V rails without level shifters |
Pinout & Package
ISL84523IV is housed in a 16-lead TSSOP package (JEDEC MO-153, pkg drawing M16.173), 5.00mm × 4.40mm × 1.20mm profile, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1, IN2, IN3, IN4 | Digital control input | Active-low logic sense for NC channels; active-high for NO channels - enables direct microcontroller GPIO interface |
| COM1–COM4 | Analog common terminal | Signal path midpoint; connects to load or source - no internal GND tie, enabling floating or bipolar signal routing |
| NO1, NO4 | Normally open analog terminal | Open-circuit when IN = 0V; closed when IN ≥2.4V - used for enable/disable paths in audio/video routing |
| NC2, NC3 | Normally closed analog terminal | Closed when IN = 0V; open when IN ≥2.4V - provides fail-safe default connection in safety-critical signal paths |
| V+ | Positive supply rail | Powers internal logic and PMOS gates - sets upper analog voltage limit and defines VIH threshold |
| V− | Negative supply rail | Powers NMOS gates and defines lower analog voltage limit - must be applied before signals to prevent ESD diode conduction |
| GND | Logic ground reference | Reference for digital inputs only - isolated from analog signal path to avoid ground-loop noise injection |
| N.C. | No internal connection | Unbonded pad - must be left floating or tied to GND for mechanical stability; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Dual SPDT / dual 2:1 mux capability | Two NO + two NC channels allow reconfiguration as two independent SPDTs or two 2:1 analog multiplexers without external components |
| Break-before-make timing | 20ns typical delay between NC opening and NO closing prevents transient shorting in bidirectional signal paths |
| RON flatness | 12Ω max delta over full signal range (±3V at ±5V supply) - maintains consistent gain and linearity across input voltage swing |
| Channel-to-channel RON match | <1Ω max mismatch at ±5V - critical for matched gain in differential or ratiometric measurement topologies |
| Low power consumption | <1μW quiescent - extends battery life in handheld ECG and portable ultrasound devices operating at 3V |
Applications
| Ultrasound Beamforming Front-End | Portable ECG Signal Routing |
|---|---|
Use Scenario: Multiplexing 16–64 transducer elements to fewer receive channels in handheld ultrasound probes. IC Role / Device Role / Timing Role: Dual 2:1 analog multiplexer routing echo return signals with sub-50ns switching and <1nA leakage. Use Value: Preserves weak µV-level echo fidelity and enables time-gain compensation without added offset drift or crosstalk-induced image artifacts. |
Use Scenario: Selecting between limb leads (RA/LA/LL) and chest leads (V1–V6) in battery-powered ECG monitors. IC Role / Device Role / Timing Role: Quad SPST switch providing fail-safe NC paths for default lead configuration and NO paths for optional selections. Use Value: Ensures reliable baseline connection during power-up or MCU reset, eliminating lead-disconnect false alarms. |
| Audio Channel Switching in Headsets | Industrial Sensor Multiplexing |
Use Scenario: Routing microphone and speaker signals between multiple Bluetooth codecs and analog audio jacks in smart headsets. IC Role / Device Role / Timing Role: Low-RON analog switch enabling clean audio passband (DC–20kHz) with <−90dB crosstalk. Use Value: Prevents audible pop/click during codec handover and eliminates inter-channel bleed in stereo mixing. |
Use Scenario: Scanning 8 thermocouple or RTD inputs into a single sigma-delta ADC in programmable logic controllers. IC Role / Device Role / Timing Role: Precision SPST switch with <1Ω RON matching and <1pC charge injection for accurate cold-junction compensation. Use Value: Reduces measurement uncertainty below ±0.1°C without calibration per channel, lowering BOM cost and firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL43142IUZ-T | Pin-compatible QFN-16 (3×3mm); 45ns tON/15ns tOFF; 40Ω RON at ±5V; same NO/NC mix | Smaller footprint and improved thermal resistance (θJA = 65°C/W vs 150°C/W); higher current rating (25mA) | Select for space-constrained PCBs or higher ambient temperature operation (>85°C junction) |
| MAX4523ESE+ | SOIC-16; 60ns tON/20ns tOFF; 100Ω RON at ±5V; all-NO configuration only | Lacks NC channels; requires external pull-downs to emulate NC behavior; lower ESD rating (1.5kV) | Acceptable only if design can accommodate all-NO topology and does not require break-before-make or fail-safe defaults |
Compared with ISL43142IUZ-T, the ISL84523IV offers identical switching performance but larger TSSOP packaging for easier rework; compared with MAX4523ESE+, it provides essential NC functionality and superior leakage/ESD specs critical for medical-grade signal integrity.
Availability
ISL84523IV is available at Aetrix Electronics and suitable for portable medical diagnostics, industrial sensor data acquisition, and consumer audio routing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL84523IV 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-reliability signal conditioning and energy-efficient IC design.
The ISL84523IV belongs to Intersil's low-voltage analog switch family engineered for battery-powered instrumentation, portable medical devices, and high-fidelity signal routing where low leakage, fast switching, and rail-to-rail operation are mandatory.
FAQ
What supply configurations does the ISL84523IV support?
The ISL84523IV operates from a single +2V to +12V supply (with V− tied to GND) or a bipolar ±2V to ±6V supply. At ±5V, it achieves 65Ω RON and 45ns/15ns switching; at +3V, RON rises to 260Ω and tON increases to 120ns. The ISL84523IV requires both V+ and V− to be powered before applying analog signals to avoid ESD diode conduction.
How does the ISL84523IV implement break-before-make timing?
The ISL84523IV guarantees break-before-make timing (tD = 20ns typ at ±5V) specifically between its paired NO/NC channels (e.g., NO1/NC1). This is achieved through internal gate-drive sequencing that delays NO turn-on until NC turn-off is complete. The ISL84523IV truth table confirms complementary logic states: IN = 0 selects NC, IN = 1 selects NO - ensuring no overlap in conduction.
Can the ISL84523IV be used in a single-supply 3.3V system?
Yes, the ISL84523IV functions reliably at +3.3V (within its +2V to +12V range), delivering 260Ω RON and 120ns/40ns tON/tOFF. Its TTL/CMOS-compatible inputs accept VIH ≥2.4V, so standard 3.3V logic drives it directly. However, analog signal range is limited to 0V to +3.3V, and leakage rises to ±10nA over temperature - acceptable for most portable instrumentation.
What is the maximum analog signal voltage the ISL84523IV can switch?
The ISL84523IV supports analog signals from V− to V+ - i.e., ±6V for bipolar operation or 0V to +12V for single supply. Absolute maximum ratings allow −0.3V to +15V on any pin relative to GND, but sustained operation beyond V−/V+ risks forward-biasing internal ESD diodes. For safe 3.3V systems, keep signals within 0V to +3.3V; for ±5V, keep within −5V to +5V.
Is the ISL84523IV pin-compatible with industry-standard analog switches?
Yes, the ISL84523IV shares the same 16-pin SOIC/TSSOP footprint and pinout as DG411, DG412, and DG413, and serves as a drop-in replacement for MAX4521–MAX4523. Its IN/COM/NO/NC assignments match DG413's dual SPDT layout. However, unlike DG413, the ISL84523IV integrates break-before-make timing and specifies <1nA leakage - verified in the FN6031 datasheet.
ISL84523IV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±2V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 80ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
ISL84523IV FAQ
1.How can I place an order for ISL84523IV through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL84523IV 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 ISL84523IV reliable?
The price and inventory of ISL84523IV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL84523IV is usually 5 days.
3.What payment methods are accepted for ISL84523IV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL84523IV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL84523IV?
ISL84523IV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL84523IV 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 ISL84523IV?
For technical support, including ISL84523IV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL84523IV requirements.
6.How does Aetrix verify that ISL84523IV is sourced from the original manufacturer or authorized distributors?
All ISL84523IV 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 ISL84523IV meets industry standards.
7.What is the process for return or replacement of ISL84523IV?
All ISL84523IV units undergo pre-shipment inspection (PSI). If there is an issue with ISL84523IV, 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 ISL84523IV part is unused and in its original packaging.
Return procedure for ISL84523IV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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