All Alternatives

Alternatives to Texas Instruments LMP8640MKX-H/NOPB

Texas Instruments LMP8640MKX-H/NOPB and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for Texas Instruments LMP8640MKX-H/NOPB

LMP8640MKX-H/NOPB compared against its qualified second sources
LMP8640MKX-H/NOPBTexas InstrumentsLMP8640HVMKX-H/NOPBTexas InstrumentsINA181A3IDBVTTexas Instruments+1more
FFF CompatibilityBoth parts share the exact same SOT-23-6 Thin (DDC) package with identical pin assignments (VOUT on pin 1, V- on pin 2, +IN on pin 3, -IN on pin 4, NC on pin 5, V+ on pin 6).Both devices use the identical 2.9 mm x 1.6 mm thin SOT-23 package, requiring no mechanical or footprint adjustments.It delivers identical electrical characteristics with a higher safety ceiling for the common-mode voltage range (up to 76 V vs the original 42 V).The pinout is almost identical, but pin 5 of the INA181 is a reference pin (REF) that must be tied to ground or a bias voltage, whereas pin 5 on the LMP8640 is a No-Connect (NC). Leaving pin 5 floating on the INA181 will cause incorrect operation.Uses the same standard 6-pin SOT-23 package outline.The supply voltage is limited to 5.5 V max (vs 12 V) and the common-mode range is narrower (-0.2 V to +26 V vs -2 V to +42 V). It is only suitable for low-voltage applications.
AI Summary

LMP8640MKX-H/NOPB by Texas Instruments: Current Sense Amplifier 1 Circuit SOT-23-THIN.

The LMP8640HVMKX-H/NOPB is the higher voltage drop-in sibling from the same family. It is a seamless replacement that matches all physical and electrical characteristics of the original part while providing an upgraded common-mode input voltage capability.

  • Direct pin-compatible drop-in replacement
  • Identical 100 V/V gain and 2.7 V to 12 V supply range
  • Significantly higher common-mode voltage ceiling of 76 V vs 42 V
  • Slightly higher unit cost due to the upgraded high-voltage capability

The INA181A3IDBVT is a lower-voltage, bidirectional alternative with a fixed gain of 100 V/V. It can be used as a close alternative if the system operating voltage is under 26 V and the supply is 5 V or lower, though it requires grounding pin 5.

  • Highly cost-optimized and widely available alternative
  • Slightly wider bandwidth (350 kHz vs 230 kHz) and higher slew rate (2 V/µs vs 1.8 V/µs)
  • Supports bidirectional current-sensing if the reference pin is biased
  • Narrower common-mode voltage range (-0.2 V to +26 V vs -2 V to +42 V)
  • Lower maximum supply voltage (5.5 V vs 12 V)
Lifecycle StatusActiveActiveActive
Market AvailabilityNon-stockIn stockIn stock
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PartMarket availabilityLifecycleAlternatives available
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