Renesas ISL28915FH6Z-T7

Overview

ISL28915FH6Z-T7 from Intersil is a nano-power, rail-to-rail input/output (RRIO) comparator with push/pull output, designed for single-supply operation from 1.8V to 5.5V, consuming only 500nA typical supply current and featuring an enable pin for ultra-low-power system control in battery-operated telemetry and monitoring systems.

For engineers reviewing the ISL28915FH6Z-T7 datasheet, ISL28915FH6Z-T7 pinout, ISL28915FH6Z-T7 application, or ISL28915FH6Z-T7 equivalent, key selection criteria include its 150µs propagation delay at 20mV overdrive, ±2mV input offset voltage, 600nA max active current, and SOT-23-6 package compatibility with high-impedance sensor interfaces and energy-harvesting signal conditioning.

Technical Context

The ISL28915FH6Z-T7 implements a CMOS-based RRIO architecture with complementary PMOS/NMOS output transistors enabling rail-to-rail swing-typically within 10mV of V+ and 35mV of GND under 10kΩ load-and break-before-make switching that causes load-dependent propagation delay asymmetry between rising and falling edges.

Its enable circuit features supply-proportional threshold (VENH = V+ − 0.3V), with enable/disable delays varying from ~800µs at 2V to ~200µs at 5V; in disabled state, supply current drops to 0.25nA typical, supporting multi-comparator parallel MUX configurations without contention.

Key Specifications

Pinout & Package

ISL28915FH6Z-T7 is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AA, pkg drawing P6.064A), with 1.6mm × 2.9mm footprint, 0.95mm height, and 0.95mm lead pitch - optimized for space-constrained portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanopower comparator applications.

Compared with TLC3702CDR and MAX9062ASA+, the ISL28915FH6Z-T7 uniquely combines 600nA max supply current, integrated enable pin, SOT-23-6 footprint, and guaranteed −40°C to +125°C operation-making it the only option for compact, long-life, temperature-hardened nanopower threshold detection.

Availability

ISL28915FH6Z-T7 is available at Aetrix Electronics and suitable for battery-powered portable systems, telemetry and remote monitoring systems, and alarm and monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ISL28915FH6Z-T7 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 company, now part of Renesas Electronics, with expertise in low-power, high-reliability signal conditioning ICs.

The ISL28915FH6Z-T7 belongs to Intersil's nanopower comparator product line, engineered specifically for energy-constrained applications including batteryless sensors, wearable health monitors, and industrial wireless nodes operating across extreme temperatures.

FAQ

What is the maximum supply voltage for the ISL28915FH6Z-T7?

The absolute maximum supply voltage for the ISL28915FH6Z-T7 is 5.75V. Operation above this voltage risks permanent damage. The recommended operating range is 1.8V to 5.5V, and the device delivers specified performance-including 600nA max supply current and ±2mV input offset-within this window. Exceeding 5.5V may degrade reliability even if below 5.75V, per Absolute Maximum Ratings in FN8343 Rev.0.00.

Does the ISL28915FH6Z-T7 support rail-to-rail input common-mode voltage?

Yes, the ISL28915FH6Z-T7 supports true rail-to-rail input common-mode range from GND − 0.5V to V+ + 0.5V, verified across −40°C to +125°C. This allows direct interface with sensors whose outputs swing near supply rails-such as resistive divider networks tied to V+-without external level-shifting. Input bias current remains below 100pA across this full range, preserving accuracy in high-impedance applications.

How does the enable pin (EN) function on the ISL28915FH6Z-T7?

The EN pin on the ISL28915FH6Z-T7 is an active-high digital control input: logic high (≥V+ − 0.3V) enables normal comparator operation with 500nA typical supply current; logic low (≤GND + 0.3V) places the output in high-impedance state and reduces supply current to ≤20nA max. The EN pin must never be left floating-it should be tied directly to V+ if unused-and exhibits ≤2.2nA input current across temperature, ensuring minimal loading on control logic.

What is the typical propagation delay of the ISL28915FH6Z-T7 under standard conditions?

The ISL28915FH6Z-T7 has a typical propagation delay of 150µs when measured with 20mV input overdrive, CL = 10pF, and V+ = 5V at +25°C. Delay varies with supply voltage (decreasing as V+ increases), overdrive (decreasing as overdrive increases), and load configuration (RL tied to GND vs. V+). Full characterization across −40°C to +125°C shows delay remains ≤260µs under worst-case conditions per FN8343 electrical specifications.

Can multiple ISL28915FH6Z-T7 comparators share a common output bus?

Yes-multiple ISL28915FH6Z-T7 comparators can share a common output bus using their EN pins to implement a hardware MUX. When disabled, each device presents high-impedance output and draws ≤20nA supply current, eliminating contention. This architecture is validated in the Applications Information section of FN8343, which explicitly recommends tying EN pins to separate control lines and connecting all OUT pins together for channel-selectable threshold detection in multi-sensor systems.