Renesas ISL55142IVZ

Overview

ISL55142IVZ from Intersil is a dual-channel, high-speed 18V CMOS window comparator with programmable dual thresholds (CVA/CVB), 9.5ns typical propagation delay, and user-defined output voltage rails (VOH/VOL). It operates across ±3V to ±9V supplies (18V total), supports TTL/ECL/CMOS/LVDS input families, and delivers three-state digital qualification of analog inputs for ATE and power supervision.

For engineers reviewing the ISL55142IVZ datasheet, ISL55142IVZ pinout, ISL55142IVZ application, or ISL55142IVZ equivalent, this device enables precise voltage-window detection in high-speed test systems, fast supervisory control, and instrumentation where wide common-mode range (VEE to VCC–5V) and logic-level flexibility are critical.

Technical Context

The ISL55142IVZ implements two independent dual-threshold comparators per channel, each comparing VINPX against CVAx (high threshold) and CVBx (low threshold) to generate QAx/QBx outputs. Its architecture supports true three-state window qualification-Valid Low (CVA)-with no internal tri-state logic but configurable VOH/VOL analog supply pins.

Propagation delay is tightly controlled at 4.0–15ns (typ 9.5ns) with <2ns rise/fall times and ≤2ns channel-to-channel mismatch. Power-down mode reduces supply current to <10µA via dedicated PD pin, with 10µs shutdown and 15µs wake-up latency, while thermal performance is optimized for 20-lead TSSOP (θJA = 76°C/W).

Key Specifications

Pinout & Package

ISL55142IVZ uses a 20-lead Thin Shrink Small Outline Package (TSSOP) with exposed pad for thermal management. Pin 1 is marked by a dot or notch; the package outline conforms to JEDEC MO-153 and Intersil drawing M20.173.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-threshold comparator applications.

Compared with ISL55142IRZ and LMH7322MA/NOPB, the ISL55142IVZ uniquely combines programmable dual thresholds, user-defined output voltage rails, and TSSOP packaging - enabling direct replacement of discrete resistor-divider + comparator solutions in ATE and power supervision where layout compatibility and design flexibility are prioritized over minimal propagation delay.

Availability

ISL55142IVZ is available at Aetrix Electronics and suitable for burn-in ATE test systems, low-cost automated test equipment, and fast supervisory power control requiring stable component supply and long-term lifecycle support.

Supply support for ISL55142IVZ 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 specialist, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and test equipment markets.

The ISL55142IVZ belongs to Intersil's high-speed comparator family designed specifically for voltage-window qualification in automated test environments, emphasizing wide supply range, logic-family interoperability, and low-power shutdown.

FAQ

What is the function of the VOH and VOL pins on the ISL55142IVZ?

The VOH and VOL pins on the ISL55142IVZ are unbuffered analog supply inputs that set the logic-high and logic-low voltage levels for all QA/QB outputs. Unlike standard digital outputs, these pins allow direct connection to the host controller's I/O supply rails (e.g., 3.3V or 5V), enabling seamless interface with TTL, LVCMOS, or ECL logic without level shifters. The ISL55142IVZ requires VOH > VOL and sufficient current sourcing capability from the connected supply.

Can the ISL55142IVZ operate with a single 12V supply?

Yes, the ISL55142IVZ can operate with a single 12V supply by connecting VEE to ground and VCC to +12V. Its common-mode input range extends from VEE (0V) to VCC–5V (7V), supporting detection of signals within that window. However, for full 18V range utilization or negative-rail sensing, a split supply (e.g., +12V/–3V) is required. The ISL55142IVZ datasheet specifies recommended operating conditions for both configurations.

How does the power-down feature work on the ISL55142IVZ?

The ISL55142IVZ enters low-power mode when the PD pin is driven high (to VCC); it remains active when PD is tied to VEE (ground). In power-down, supply current drops from ~16mA (dual-channel active) to <10µA, with 10µs shutdown latency and 15µs wake-up time. This feature is ideal for intermittent-test systems where comparators are idle between measurements, preserving signal integrity without external power switches.

What is the significance of the "three-state window comparator" description for the ISL55142IVZ?

The ISL55142IVZ is called a "three-state window comparator" because its dual outputs (QA/QB) encode three distinct input conditions: QA=QB=0 for VINP < CVB (Valid Low), QA=0/QB=1 for CVB < VINP < CVA (Invalid/No-man's-land), and QA=QB=1 for VINP > CVA (Valid High). This eliminates ambiguity in threshold crossing detection and replaces discrete resistor-divider + comparator circuits with a single IC, simplifying ATE fixture design.

Is the ISL55142IVZ pin-compatible with other devices in the ISL5514x family?

No, the ISL55142IVZ is not pin-compatible with ISL55141 or ISL55143 due to differing channel counts and package footprints: ISL55141 is 14-lead TSSOP (1 channel), ISL55142IVZ is 20-lead TSSOP (2 channels), and ISL55143 is 36-lead TQFN (4 channels). Even within the ISL55142 variant, the IVZ (TSSOP) and IRZ (QFN) packages have incompatible pinouts and thermal pad configurations - PCB redesign is required for substitution.