Renesas ISL43144IVZ

Overview

ISL43144IVZ from Renesas (formerly Intersil) is a quad SPST analog switch with four normally open (NO) channels, designed for precision signal routing in low-voltage, battery-powered systems. It operates from single +2V to +12V or dual ±2V to ±6V supplies, delivers 18Ω max R_ON at ±4.5V, 52ns t_ON/40ns t_OFF, and <2.5nA max off-leakage at 85°C - enabling high-fidelity audio/video switching and portable medical sensor multiplexing.

For engineers reviewing the ISL43144IVZ datasheet, ISL43144IVZ pinout, ISL43144IVZ application, or ISL43144IVZ equivalent, this page provides verified electrical specs, TSSOP-16 pin mapping, real-world use cases in handheld test gear and ultrasound front-ends, and two validated alternative parts with documented functional trade-offs.

Technical Context

The ISL43144IVZ uses CMOS architecture with level-shifted digital control to drive analog switches across full supply rails. Its internal logic is powered by V+ and GND, while analog channel conduction is governed by both V+ and V−, making R_ON and switching speed supply-dependent - e.g., R_ON drops from 51Ω at 3V to 14Ω at 10.8V, and t_ON improves from 120ns to 40ns over the same range.

Each NO channel features matched R_ON (<1Ω typical ΔR_ON), 5Ω max R_ON flatness, and 26pF C_COM(OFF) with 71dB OFF isolation at 1MHz - supporting high-frequency multiplexing up to 200MHz in 50Ω systems without signal degradation.

Key Specifications

Pinout & Package

ISL43144IVZ is housed in a 16-lead TSSOP (Pb-free, RoHS-compliant) with 0.65mm pitch and exposed thermal pad. Pin numbering follows standard JEDEC outline M16.173.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with ADG1414BRUZ and TMUX1574RTER, the ISL43144IVZ uniquely balances wide supply flexibility (2V–12V), ultra-low leakage (<2.5nA), and industry-standard TSSOP-16 footprint - making it optimal for portable, battery-constrained designs where power efficiency and signal fidelity are co-prioritized.

Availability

ISL43144IVZ is available at Aetrix Electronics and suitable for portable medical devices, handheld test instruments, and battery-powered audio systems requiring stable component supply across extended product lifecycles.

Supply support for ISL43144IVZ 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 acquired Intersil in 2017 and maintains full technical and supply-chain continuity for legacy precision analog products.

The ISL43144IVZ belongs to the ISL4314x family of low-voltage, high-performance analog switches engineered specifically for portable, low-power instrumentation and signal-routing applications demanding precision, speed, and supply flexibility.

FAQ

What supply configurations does the ISL43144IVZ support?

The ISL43144IVZ operates from a single +2V to +12V supply (with V− tied to GND) or a dual ±2V to ±6V supply. At +3.3V single supply, R_ON is 51Ω max and t_ON is 120ns; at ±4.5V, R_ON improves to 18Ω and t_ON reduces to 52ns. The ISL43144IVZ datasheet specifies full functionality across this entire range without derating.

How does the ISL43144IVZ achieve low leakage in battery-powered systems?

The ISL43144IVZ achieves ≤2.5nA max off-leakage at 85°C via optimized CMOS process design and ESD diode biasing that minimizes reverse leakage across V+ and V−. This enables accurate DC-coupled measurements in portable electrocardiograph and ultrasound front-ends where even nanoamp-level errors corrupt baseline stability - a key advantage over alternatives like TMUX1574RTER (10nA).

Is the ISL43144IVZ pin-compatible with older industry-standard analog switches?

Yes, the ISL43144IVZ is explicitly pin-compatible with DG411, DG412, and DG413 quad SPST switches in TSSOP-16 packages. Pin functions match directly: IN1–IN4, NO1–NO4, COM1–COM4, V+, V−, GND, and N.C. This allows drop-in replacement in legacy designs without PCB revision - confirmed in the ISL43144IVZ datasheet Table 1 and Pin Descriptions section.

What is the maximum analog signal voltage range supported by the ISL43144IVZ?

The ISL43144IVZ supports analog signals from V− to V+ across all operating conditions. With ±4.5V supplies, the full analog range is –4.5V to +4.5V; with +12V/V− = GND, it is 0V to +12V. Absolute maximum ratings allow signals up to (V− – 0.3V) to (V+ + 0.3V), but sustained operation beyond V−/V+ risks ESD diode conduction - so the practical signal range remains strictly within the supply rails.

Does the ISL43144IVZ require external protection against overvoltage on analog pins?

No external protection is required if analog signals stay within V− and V+. Internal ESD diodes clamp signals exceeding those rails, but forward conduction occurs above V+ + 0.3V or below V− – 0.3V. For systems where overvoltage is possible (e.g., hot-plug interfaces), a 1kΩ series resistor on each digital input or Schottky diodes from analog pins to V+/V− (per Figure 8 in the ISL43144IVZ datasheet) is recommended to limit current without degrading R_ON.