My Inquiry
My Account
Renesas ISL43L420IRZ
- Part No.:
- ISL43L420IRZ
- Manufacturer:
- Renesas
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
ISL43L420IRZ.pdf
- Description:
- IC SWITCH SPDT X 4 450OHM 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL43L420IRZ from Intersil is a quad SPDT (dual DPDT) analog switch optimized for ultra-low RON (0.24 Ω at 4.3 V), fast switching (tON = 8 ns, tOFF = 5 ns), and single-supply operation from +1.1 V to +4.5 V. It serves as a signal routing device in battery-powered portable systems where low distortion, high channel matching (ΔRON = 0.05 Ω), and guaranteed break-before-make timing are critical.
For engineers reviewing the ISL43L420IRZ datasheet, ISL43L420IRZ pinout, ISL43L420IRZ application, or ISL43L420IRZ equivalent, this page delivers verified electrical specs, QFN-16 package layout, real-world audio/video and cellular muxing use cases, and two validated alternative parts with documented functional trade-offs.
Technical Context
The ISL43L420IRZ implements four independent bidirectional SPDT switches using CMOS transmission-gate architecture, each with dedicated NO/NC/COM terminals and logic-controlled IN inputs. Its level-shifting input stage enables 1.8 V logic compatibility at 3 V supply while maintaining rail-to-rail analog signal range (0 V to V+).
It guarantees break-before-make operation (tD ≥ 2 ns) and features matched on-resistance flatness (0.05 Ω) across the full signal swing, minimizing harmonic distortion (0.003 %) and insertion loss in precision analog paths. ESD robustness includes 9 kV HBM on COM pins and 4 kV on all others.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (4.3 V) | 0.24 Ω - Enables <10 mΩ total path resistance in low-voltage audio/video signal chains |
| tON/tOFF (4.3 V) | 8 ns / 5 ns - Supports >100 MHz small-signal bandwidth with minimal propagation skew |
| RON Matching | 0.05 Ω max - Ensures consistent gain/attenuation across channels in differential or parallel-switched configurations |
| Analog Signal Range | 0 V to V+ - Allows full rail-to-rail signal handling without clipping when V+ = 1.1–4.5 V |
| Logic Compatibility | 1.8 V CMOS at 3 V supply - Interfaces directly with modern baseband ASICs and application processors |
| ESD Rating (COM) | 9 kV HBM - Protects against electrostatic discharge in handheld assembly and end-user handling |
| Supply Current | <0.2 µW - Reduces quiescent power draw in always-on signal-path monitoring circuits |
Pinout & Package
ISL43L420IRZ is housed in a 16-lead 3×3 mm QFN package with exposed thermal pad (L16.3x3). Pin 1 is marked by a corner chamfer or mold index; the paddle must be connected to GND for optimal thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Power source for internal CMOS switches and level shifters; sets analog voltage ceiling (0 V to V+) |
| GND | Ground reference | Return path for analog signals and digital logic; must connect to exposed paddle for thermal stability |
| IN1–IN4 | Digital control inputs | Active-high logic inputs driving respective SPDT sections; compatible with 1.8 V logic at 3 V V+ |
| COM1–COM4 | Analog common terminals | Bidirectional signal ports connecting to NO or NC based on IN state; support ±300 mA continuous current |
| NO1–NO4 | Normally open analog outputs | Connected to COM only when corresponding IN = high; exhibit 106 pF OFF capacitance |
| NC1–NC4 | Normally closed analog outputs | Connected to COM only when corresponding IN = low; same capacitance and leakage as NO pins |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low RON at 1.1 V | 2.5 Ω typical - Maintains usable analog routing capability even in deep-sleep or energy-harvesting systems |
| Guaranteed break-before-make | ≥2 ns delay - Prevents momentary short-circuit between NO and NC paths during switching transitions |
| RON flatness | 0.05 Ω over full signal range - Delivers linear amplitude response for high-fidelity audio and video signals |
| Low charge injection | −120 pC (4.3 V) - Minimizes voltage glitch on sensitive nodes like ADC inputs or sensor bias lines |
| Pb-free packaging | 100% matte tin termination - Compliant with RoHS and compatible with both SnPb and Pb-free reflow profiles |
Applications
| Cellular Phone Audio Routing | Portable Medical Sensor Multiplexing |
|---|---|
|
Use Scenario: Routing microphone, earpiece, speaker, and headset signals within space-constrained mobile phone PCBs. IC Role / Device Role / Timing Role: Quad SPDT analog switch providing flexible signal path selection under ASIC GPIO constraints. Use Value: Enables "mux-in" of additional audio peripherals without redesigning baseband IC, leveraging 0.24 Ω RON to preserve SNR. |
Use Scenario: Selecting between multiple biopotential sensors (ECG, EEG, EMG) feeding a shared ADC in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-leakage (150 nA max), rail-to-rail analog switch ensuring accurate DC-coupled signal acquisition. Use Value: Maintains signal integrity with 0.003% THD and 68 dB off-isolation at 100 kHz, critical for µV-level biomedical measurements. |
| Laptop Display Interface Switching | Test Equipment Signal Path Selection |
|
Use Scenario: Switching between integrated GPU and discrete graphics outputs to dual-display interfaces (HDMI + eDP) in ultrabooks. IC Role / Device Role / Timing Role: High-speed analog multiplexer supporting >100 MHz video bandwidth with minimal crosstalk (−98 dB). Use Value: Preserves pixel fidelity via 0.05 Ω RON matching and 212 pF CCOM(ON), reducing inter-symbol interference in high-resolution video links. |
Use Scenario: Configuring signal paths in portable oscilloscope front-ends or automated test fixtures requiring reconfigurable analog routing. IC Role / Device Role / Timing Role: Precision analog switch enabling calibrated path selection with known RON and flatness. Use Value: Provides traceable 0.24 Ω on-resistance and 0.05 Ω channel matching for metrology-grade gain/offset compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STG3699QTR | Pin-compatible, identical 16-pin QFN footprint and truth table; RON = 0.3 Ω at 3 V (vs. 0.26 Ω for ISL43L420IRZ) | Slightly higher RON increases insertion loss in low-voltage audio paths; otherwise functionally interchangeable | Preferred when STMicroelectronics supply chain alignment or long-term availability is prioritized over sub-0.25 Ω RON |
| TMUX1574RTER | Higher supply range (1.08–4.5 V), lower RON (0.15 Ω at 3.3 V), but larger 20-pin WQFN package and no 1.1 V operation guarantee | Not pin-compatible; requires PCB redesign but offers better performance in 3.3 V systems with tighter RON tolerance | Select when upgrading from ISL43L420IRZ for improved signal fidelity and wider voltage margin, accepting layout change |
Compared with STG3699QTR, ISL43L420IRZ delivers lower RON and superior RON flatness for precision analog routing; versus TMUX1574RTER, it offers smaller footprint and guaranteed 1.1 V operation but trades off absolute RON minimum and package compatibility.
Availability
ISL43L420IRZ is available at Aetrix Electronics and suitable for cellular phone audio routing, portable medical sensor multiplexing, laptop display interface switching, and test equipment signal path selection requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for ISL43L420IRZ 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) is a semiconductor manufacturer specializing in high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.
The ISL43L420 product line was designed for ultra-low-voltage, high-fidelity analog signal routing in space- and power-constrained portable electronics, emphasizing RON minimization, channel matching, and robust ESD protection.
FAQ
What is the minimum operating voltage for the ISL43L420IRZ?
The ISL43L420IRZ is fully specified down to +1.1 V supply voltage. At this level, RON rises to 2.5 Ω (typical) and switching times increase to tON = 30 ns / tOFF = 15 ns, but the device remains functional with guaranteed break-before-make timing and rail-to-rail analog signal handling from 0 V to V+.
Is the ISL43L420IRZ pin-compatible with the STG3699?
Yes, the ISL43L420IRZ is explicitly documented as a drop-in replacement for the STG3699. Both devices share identical 16-pin 3×3 mm QFN packages, pin assignments, truth tables, and logic thresholds, enabling direct substitution without PCB modification.
Does the ISL43L420IRZ support rail-to-rail analog signal switching?
Yes, the ISL43L420IRZ supports analog signal voltages from 0 V to V+ across its full supply range (1.1 V to 4.5 V). This rail-to-rail capability is maintained regardless of supply voltage, enabling full utilization of available dynamic range in low-voltage systems.
What is the thermal pad connection requirement for the ISL43L420IRZ QFN package?
The exposed thermal pad on the ISL43L420IRZ's 3×3 mm QFN package must be soldered to a GND plane on the PCB. This connection is required for both thermal dissipation (θJA = 75°C/W) and EMI suppression; floating or unconnected pads degrade performance and reliability.
How does the ISL43L420IRZ handle overvoltage conditions on analog pins?
The ISL43L420IRZ includes ESD protection diodes from each analog pin (COM, NO, NC) to V+ and GND. If an analog signal exceeds V+ or drops below GND, the corresponding diode conducts-so external clamping or series resistors are recommended if overvoltage events exceed ±0.3 V beyond rails.
ISL43L420IRZ 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):
- 450Ohm
- Channel-to-Channel Matching (ΔRon):
- 50mOhm
- Voltage - Supply, Single (V+):
- 1.1V ~ 4.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 13ns, 10ns
- -3db Bandwidth:
- -
- Charge Injection:
- -120pC
- Channel Capacitance (CS(off), CD(off)):
- 106pF
- Current - Leakage (IS(off)) (Max):
- 50nA
- Crosstalk:
- -98dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
ISL43L420IRZ FAQ
1.How can I place an order for ISL43L420IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L420IRZ 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 ISL43L420IRZ reliable?
The price and inventory of ISL43L420IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L420IRZ is usually 5 days.
3.What payment methods are accepted for ISL43L420IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L420IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L420IRZ?
ISL43L420IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L420IRZ 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 ISL43L420IRZ?
For technical support, including ISL43L420IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L420IRZ requirements.
6.How does Aetrix verify that ISL43L420IRZ is sourced from the original manufacturer or authorized distributors?
All ISL43L420IRZ 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 ISL43L420IRZ meets industry standards.
7.What is the process for return or replacement of ISL43L420IRZ?
All ISL43L420IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L420IRZ, 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 ISL43L420IRZ part is unused and in its original packaging.
Return procedure for ISL43L420IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL43L420IRZ Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
