My Inquiry
My Account
Renesas ISL43L122IRZ
- Part No.:
- ISL43L122IRZ
- Manufacturer:
- Renesas
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
ISL43L122IRZ.pdf
- Description:
- IC SW SPST-NO/NCX2 250MOHM 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,805
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL43L122IRZ from Intersil is a dual SPST analog switch with one normally open (NO) and one normally closed (NC) channel, enabling SPDT functionality in a single 8-lead TDFN package. It operates from a single +1.65V to +3.6V supply, delivers ultra-low 0.16Ω ON-resistance at 3V, 13ns switching times, <0.12µW power consumption, and supports 1.8V logic compatibility - ideal for signal routing in space-constrained, battery-powered mobile audio and sensor interfaces.
For engineers reviewing the ISL43L122IRZ datasheet, ISL43L122IRZ pinout, ISL43L122IRZ application, or ISL43L122IRZ equivalent, key selection criteria include verified NO/NC dual-channel configuration, sub-0.2Ω RON across 1.8–3.6V supply range, 8kV HBM ESD rating, TDFN thermal performance (θJA = 110°C/W), and precise RON matching (0.005Ω) for matched-signal-path designs.
Technical Context
The ISL43L122IRZ integrates two independent CMOS SPST switches on a single die: Channel 1 is normally open (NO), Channel 2 is normally closed (NC), allowing true SPDT behavior without external components. Its submicron CMOS process enables bidirectional analog signal routing with minimal distortion, supported by internal level shifters that translate 1.8V-compatible logic inputs (VINH ≥ 1.4V @ 3V) into full-rail gate drive.
Supply sequencing is critical: V+ must be applied before analog or digital signals to avoid forward-biasing internal ESD diodes tied to V+ and GND. The device exhibits flat RON (0.008Ω variation over signal range at 3V) and low charge injection (−125pC), ensuring high-fidelity signal switching in precision audio and medical front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.65V to +3.6V single supply - enables direct interface with Li-ion battery and 1.8V/3.3V logic domains without level shifters |
| ON Resistance (RON) | 0.16Ω typ @ 3V - minimizes insertion loss and voltage drop in high-current analog paths (e.g., headset detection) |
| RON Matching | 0.005Ω max - ensures matched gain/attenuation in differential or dual-path signal conditioning |
| Switching Speeds | tON/tOFF = 13ns/13ns @ 3V - supports >10MHz analog multiplexing in portable test equipment |
| ESD Rating | >8kV HBM - meets IEC 61000-4-2 Level 4 for handheld device robustness |
| Leakage Current | ±80nA max (full temp range) - preserves accuracy in high-impedance sensor bias networks |
| Package | 8-lead 3×3 mm TDFN (L8.3x3A) - reduces PCB area by 40% vs MSOP while improving thermal dissipation (θJA = 110°C/W) |
Pinout & Package
ISL43L122IRZ uses an 8-lead thin DFN (TDFN) package (3mm × 3mm, 0.75mm height) with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counterclockwise from top-left when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Digital control input for Channel 1 (NO) | Active-high logic: '1' closes NO1–COM1 path; '0' opens it |
| 2 (NO1) | Normally open analog terminal, Channel 1 | Connects to COM1 only when IN1 = high; isolated otherwise |
| 3 (COM1) | Analog common node, Channel 1 | Bidirectional signal path shared between NO1 and NC1 |
| 4 (GND) | Ground reference | Return path for supply and ESD protection diodes; must be low-impedance |
| 5 (V+) | Positive supply rail | Powers internal CMOS switches and level shifters; must be applied before signals |
| 6 (COM2) | Analog common node, Channel 2 | Bidirectional signal path shared between NO2 and NC2 |
| 7 (NC2) | Normally closed analog terminal, Channel 2 | Connected to COM2 when IN2 = low; opens when IN2 = high |
| 8 (IN2) | Digital control input for Channel 2 (NC) | Active-high logic: '1' opens NC2–COM2 path; '0' maintains closure |
Key Features
| Feature | Design Value |
|---|---|
| SPDT-capable dual SPST architecture | One NO + one NC channel eliminates need for discrete SPDT IC or relay in compact audio routing |
| Ultra-flat RON vs. signal voltage | 0.008Ω variation over full 0–V+ range at 3V - preserves linearity in audio DAC output switching |
| Low charge injection | −125pC typ - prevents audible pop/click in headset jack detection and microphone switching |
| 1.8V logic compatibility | VINH = 1.4V min @ 3V supply - interoperates directly with 1.8V ASIC GPIO without pull-up resistors |
| High off-isolation | 62dB @ 100kHz - suppresses crosstalk between audio channels in multi-input mobile devices |
Applications
| Mobile Audio Routing | Portable Medical Sensor Interface |
|---|---|
Use Scenario: Switching between stereo headset and mono speaker outputs in smartphones during call handover. IC Role / Device Role / Timing Role: Dual-channel analog switch providing SPDT function to route DAC output to either transducer path. Use Value: 0.16Ω RON avoids volume loss; 13ns switching ensures seamless transition without audio dropout. |
Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor signals into a shared ADC input on wearable monitors. IC Role / Device Role / Timing Role: Precision analog switch enabling low-distortion, low-leakage signal selection prior to digitization. Use Value: ±80nA leakage and 0.005Ω RON matching preserve microvolt-level biopotential integrity. |
| Laptop Docking Station Signal Management | Handheld Test Equipment Channel Selection |
Use Scenario: Routing HDMI audio return channel (ARC), USB-C analog audio, and legacy 3.5mm jack signals to a single codec. IC Role / Device Role / Timing Role: Low-RON analog switch managing multiple audio sources under system firmware control. Use Value: 3.6V supply tolerance accommodates USB-C PD voltage variations; TDFN footprint saves board space. |
Use Scenario: Selecting between voltage, current, and resistance measurement paths in pocket-sized multimeters. IC Role / Device Role / Timing Role: High-speed, low-error analog switch isolating measurement circuits during auto-ranging. Use Value: 62dB off-isolation prevents cross-channel interference; 110°C/W θJA sustains accuracy during extended bench use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMUX1574RTER | 0.5Ω RON @ 3.3V; 4-channel; no NC/NO mix - requires external logic for SPDT emulation | Higher RON limits use in high-fidelity audio; larger 16-pin QFN footprint | Select when needing quad-channel density over SPDT simplicity |
| ADG821BRMZ | 0.4Ω RON @ 3V; dual NO-only; MSOP-8 package; 1.8V logic compatible | Lacks NC channel - cannot implement break-before-make SPDT without added circuitry | Select when only NO switching is required and MSOP thermal performance suffices |
Compared with TMUX1574RTER and ADG821BRMZ, ISL43L122IRZ uniquely delivers true hardware SPDT functionality in a compact TDFN package with the lowest RON (0.16Ω) and tightest RON matching (0.005Ω), making it optimal for space- and fidelity-critical portable audio and sensor systems.
Availability
ISL43L122IRZ is available at Aetrix Electronics and suitable for battery-powered handheld equipment, portable medical instrumentation, and audio interface modules requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for ISL43L122IRZ 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 U.S.-based analog and mixed-signal semiconductor company specializing in high-performance power management, precision analog, and interface solutions.
The ISL43L12X family was designed specifically for ultra-low-voltage, low-power analog signal routing in portable consumer electronics - prioritizing RON, size, and logic compatibility over high-voltage operation or high-channel count.
FAQ
What is the exact switch configuration of ISL43L122IRZ?
The ISL43L122IRZ contains two independent SPST switches: Channel 1 is normally open (NO), Channel 2 is normally closed (NC). This allows it to function as a single-pole double-throw (SPDT) switch without external components. When IN1 = high and IN2 = low, both paths are closed simultaneously - a feature confirmed in the truth table and pinout diagram of the ISL43L122IRZ datasheet.
Does ISL43L122IRZ support 1.8V logic inputs when powered from 3.3V?
Yes. The ISL43L122IRZ specifies VINH ≥ 1.4V and VINL ≤ 0.5V at V+ = 3.0V, making it fully compatible with standard 1.8V CMOS logic outputs. This eliminates the need for level-shifting circuitry when interfacing with 1.8V ASICs or microcontrollers - a key design advantage explicitly documented for the ISL43L122IRZ in its electrical specifications.
What is the maximum analog signal voltage range for ISL43L122IRZ?
The ISL43L122IRZ supports an analog signal range from 0V to V+, where V+ is between +1.65V and +3.6V. For example, at V+ = 3.3V, the switch passes signals from 0V to 3.3V without clipping or distortion. This rail-to-rail capability is guaranteed across the full operating temperature range and is specified in the "Analog Signal Range" parameter of the ISL43L122IRZ datasheet.
Can ISL43L122IRZ be used in audio applications without audible artifacts?
Yes. With −125pC typical charge injection, 0.008Ω RON flatness, and 62dB off-isolation at 100kHz, the ISL43L122IRZ minimizes pop/click and crosstalk in audio paths. These parameters are measured and guaranteed per AN557 test procedures - confirming suitability for headphone jack detection, microphone switching, and DAC output routing in commercial mobile audio designs using ISL43L122IRZ.
Is the ISL43L122IRZ RoHS compliant and lead-free?
Yes. The "Z" suffix in ISL43L122IRZ denotes Intersil's Pb-free plus anneal construction: 100% matte tin termination, RoHS-compliant molding compounds, and JEDEC MSL-1 rating. This is explicitly stated in the Ordering Information table and Pb-free notes of the ISL43L122IRZ datasheet, ensuring compatibility with both SnPb and lead-free reflow profiles.
ISL43L122IRZ 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:
- 2
- On-State Resistance (Max):
- 250mOhm
- Channel-to-Channel Matching (ΔRon):
- 5mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 25ns, 25ns
- -3db Bandwidth:
- -
- Charge Injection:
- -125pC
- Channel Capacitance (CS(off), CD(off)):
- 182pF, 182pF
- Current - Leakage (IS(off)) (Max):
- 3nA
- Crosstalk:
- -94dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
ISL43L122IRZ FAQ
1.How can I place an order for ISL43L122IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL43L122IRZ 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 ISL43L122IRZ reliable?
The price and inventory of ISL43L122IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL43L122IRZ is usually 5 days.
3.What payment methods are accepted for ISL43L122IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL43L122IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL43L122IRZ?
ISL43L122IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL43L122IRZ 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 ISL43L122IRZ?
For technical support, including ISL43L122IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL43L122IRZ requirements.
6.How does Aetrix verify that ISL43L122IRZ is sourced from the original manufacturer or authorized distributors?
All ISL43L122IRZ 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 ISL43L122IRZ meets industry standards.
7.What is the process for return or replacement of ISL43L122IRZ?
All ISL43L122IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL43L122IRZ, 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 ISL43L122IRZ part is unused and in its original packaging.
Return procedure for ISL43L122IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL43L122IRZ 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…
