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Analog Devices LMX331HAXK — Analog & Data Acquisition

LMX331HAXK компаратор общего назначения, открытый сток, SC-70-5

MPNLMX331HAXK
End of Life

Texas Instruments LMX331HAXK, компаратор общего назначения, 1 элемент, выход с открытым стоком (Open-Drain), задержка распространения 600ns, питание от 1,8V до 5,5V, корпус SC-70-5, от -40°C до 125°C.

$0.53Ref. price · indicative, final on quote
Analog Devices LMX331HAXK datasheet (PDF)
Packaging5-TSSOP, SC-70-5, SOT-353
RoHSRoHS non-compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LMX331HAXK specifications
ParameterValue
TypeGeneral Purpose
Output typeOpen-Drain
MountingSurface Mount
Voltage - input offset7mV @ 5V
Voltage - supply, single (Dual (±))1.8V ~ 5.5V
Output current73mA @ 5V
Current - quiescent120µA
Current - input bias0.25µA @ 5V
Operating temperature-40°C ~ 125°C
PackageBulk
Hysteresis2mV
Case5-TSSOP, SC-70-5, SOT-353
CMRR, PSRR70dB PSRR
Number of elements1
Propagation delay600ns (Typ)

Product details

Ключевые параметры и что они значат на стенде

Гистерезис 2mV реализован внутри микросхемы, поэтому внешние резисторы положительной обратной связи для чистого переключения медленно меняющихся сигналов не нужны — это экономит несколько пассивных компонентов в BOM. Максимальное напряжение смещения входа составляет 7mV при 5V, что определяет практическую погрешность порога детектирования; для опорного напряжения 100mV это неопределённость 7% — закладывайте её в расчёт. Максимальный ток покоя — 120µA, достаточно низкий для питающихся от батареи сенсорных узлов с периодическим пробуждением.

Корпус и монтаж — удобно для замены в полевых условиях

Корпус SC-70-5 (также известный как SOT-353) — пятивыводной корпус для поверхностного монтажа.

Жизненный цикл и поставки — без тикающих часов LTB

Frequently asked questions

Where can I buy the LMX331HAXK and get a price?

The LMX331HAXK is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — stock and price are confirmed at quote time.

What is the closest pin-compatible alternative to the LMX331HAXK?

The LMV331 in the same SC-70-5 package is a common pin-compatible alternative. The LMX331HAXK offers a wider supply range (1.8V to 5.5V vs 2.7V to 5.5V for the LMV331) and a slightly faster 600ns propagation delay versus 450ns typical for the LMV331, but both are general-purpose single comparators with open-drain outputs. Verify your voltage and speed margins before substituting.

What is the LMX331HAXK propagation delay and typical application circuit?

Propagation delay is 600ns typical. A typical application is a simple overvoltage or undervoltage detector: connect the non-inverting input to a reference voltage (e.g., from a resistor divider), the inverting input to the signal, and add a pull-up resistor on the output to your logic rail. The 2mV internal hysteresis keeps the output clean on slow edges.

Can I substitute the LMX331HAXK for the LMV331 in my circuit?

Yes, the LMX331HAXK is a drop-in replacement for the LMV331 in the SC-70-5 package if your circuit can tolerate the slightly slower 600ns propagation delay (vs 450ns typical for LMV331). The LMX331 also runs down to 1.8V, which gives you extra headroom for low-voltage designs. Check the input offset voltage and hysteresis specs against your threshold accuracy needs.

What is the difference between open-drain and push-pull output?

An open-drain output (like the LMX331HAXK) can only sink current to ground; it needs an external pull-up resistor to the desired logic voltage to produce a high level. This lets you level-shift the output to a higher voltage than the comparator's supply. A push-pull output drives both high and low internally, so no pull-up is needed, but you cannot wire-OR multiple outputs together without contention. Open-drain is preferred for mixed-voltage systems and shared interrupt lines.