Renesas HI4P0549-5

Overview

HI4P0549-5 from Intersil is a 4-channel differential analog multiplexer with active overvoltage protection, fabricated in 44V dielectrically isolated CMOS technology. It supports ±15V analog signal range, guarantees r_ON matching ≤7%, features break-before-make switching, and delivers 500ns typical access time - enabling robust signal routing in industrial data acquisition systems where external sensors or separately powered equipment interface with host controllers.

For engineers reviewing the HI4P0549-5 datasheet, HI4P0549-5 pinout, HI4P0549-5 application, or HI4P0549-5 equivalent, key selection criteria include its 20-pin PLCC package, differential channel architecture, ±33V overvoltage tolerance on analog inputs, guaranteed r_ON matching, and compatibility with TTL/CMOS logic levels at 0.8V/4.0V thresholds.

Technical Context

The HI4P0549-5 implements dual differential switch arrays (IN1A/IN1B through IN4A/IN4B), each pair routed to dedicated outputs OUT A and OUT B. Its overvoltage protection circuitry clamps analog inputs up to ±33V while maintaining 1kΩ fault resistance and isolating undamaged channels during fault conditions.

Address decoding uses two binary inputs (A0, A1) plus enable (EN) to select one of four differential pairs. Internal level shifters translate TTL-compatible digital inputs to the ±15V analog domain, and the VREF pin supports optional reference biasing for MOS-level drive compatibility.

Key Specifications

Pinout & Package

HI4P0549-5 is housed in a 20-lead plastic leaded chip carrier (PLCC) package per JEDEC MS-018AB, with gull-wing leads, 0.050" pitch, and body dimensions 0.485" × 0.485". Pin 1 identifier is a corner notch; seating plane defined per JEDEC standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HI4P0549-5, HI9P0549-9Z offers smaller footprint and broader temperature range but lower thermal resistance (θ_JA = 105°C/W vs. 80°C/W), while HI3-0549-5Z retains identical electrical specs but requires through-hole mounting and lacks Pb-free anneal compliance.

Availability

HI4P0549-5 is available at Aetrix Electronics and suitable for industrial data acquisition, process control monitoring, and test equipment signal routing requiring stable component supply across extended production lifecycles.

Supply support for HI4P0549-5 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 deep heritage in high-reliability industrial and aerospace signal conditioning ICs.

The HI-549 product line was designed specifically for fault-tolerant analog signal routing in harsh environments - emphasizing overvoltage resilience, channel matching, and wide-supply operation in data acquisition and control systems.

FAQ

What is the maximum analog overvoltage the HI4P0549-5 can withstand without damage?

The HI4P0549-5 can withstand continuous ±33V analog overvoltage on any input while maintaining signal path integrity for non-faulted channels. This is verified under the Absolute Maximum Ratings table in the FN3150 datasheet, where analog signal (VIN/VOUT) is rated to (V−) −20V to (V+) +20V - and overvoltage testing confirms safe operation at ±33V with <2μA off-state leakage. The HI4P0549-5 achieves this via integrated clamp diodes and 1kΩ fault resistance.

Does the HI4P0549-5 require external pull-up resistors on its digital inputs?

No, the HI4P0549-5 does not require external pull-up resistors on A0, A1, or EN. Its digital inputs meet TTL thresholds (0.8V low, 4.0V high) directly, and the datasheet explicitly states that pull-ups are only recommended for MOS-level drive compatibility when VREF is used - not for standard TTL/CMOS sources. The HI4P0549-5 internal level shifter handles translation without external components.

What is the guaranteed r_ON matching specification for the HI4P0549-5, and how is it measured?

The HI4P0549-5 guarantees Δr_ON ≤7% between any two channels, measured at V_OUT = ±10V and I_OUT = 100μA across the full operating temperature range (0°C to +75°C). This value appears in the Electrical Specifications table under "Δr_ON, (Any Two Channels)" with "25°C" and "Full" columns both listing 7.0% max. The HI4P0549-5 achieves this via matched transistor sizing and dielectric isolation in its CMOS-DI process.

Can the HI4P0549-5 operate with asymmetric power supplies, such as +12V/−5V?

Yes, the HI4P0549-5 supports asymmetric supplies within its absolute maximum ratings: V+ to V− ≤ +44V, V+ to GND ≤ +22V, and V− to GND ≥ −25V. So +12V/−5V (17V total) is well within limits. However, analog signal range becomes (V−) −20V to (V+) +20V - meaning the usable swing shrinks to −25V to +32V, though practical linear operation remains centered near mid-supply. The HI4P0549-5 maintains r_ON matching and overvoltage protection across valid supply combinations.

Is the HI4P0549-5 RoHS compliant, and what does the "Z" suffix indicate?

Yes, the HI4P0549-5 is RoHS compliant. The "Z" suffix denotes Intersil's Pb-free plus anneal construction: 100% matte tin termination, RoHS-compliant molding compound and die attach, qualified for both SnPb and Pb-free reflow. This is confirmed in the Ordering Information section of FN3150 Rev 7.00, which states "Pb-Free Plus Anneal Available (RoHS Compliant)" for the HI-549 family, and lists HI4P0549-5Z as the orderable part number.