Alternatives to NXP HEC4538BT-T
NXP HEC4538BT-T and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 HEC4538BT-TNXP |  HEF4538BT-Q100JNexperia USA Inc. | HEF4538BT,653Nexperia USA Inc. | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Matches the SOT109-1 (SOIC-16) package footprint and has an identical pin-by-pin assignment.Same 16-SOIC package dimensions, 1.27mm pitch, and SMT mounting profile.Slightly slower propagation delay (40 ns vs 35 ns) and narrower supply voltage limit (15 V max vs 15.5 V max). | Identical SOIC-16 footprint and matching pin assignments.Identical mechanical package dimensions and SMT mounting style.Slightly slower propagation delay (40 ns vs 35 ns) and lower maximum supply voltage (15 V vs 15.5 V). | ||
 AI Summary | HEC4538BT-T by NXP: Monostable Multivibrator 35 ns 16-SO. | This is the direct AEC-Q100 automotive-grade replacement from Nexperia, who took over NXP's standard logic portfolio. It offers the closest electrical match in performance, package, and reliability.
| This is the standard commercial-grade equivalent of the HEC series from Nexperia. It maintains excellent speed and logic behavior but does not carry the automotive-specific testing profiles of the HEC series.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Non-stock | Non-stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Monostable Multivibrator 35 ns 16-SO | Monostable Multivibrator 40 ns 16-SO | Monostable Multivibrator 40 ns 16-SO | |
| Manufacturer | NXP | Nexperia USA Inc. | Nexperia USA Inc. | |
| Type | Logic | Logic | Logic | |
| Datasheet | Open | Open | Open | |
| Lead Time | 52 weeks | 22 weeks | 20 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0060 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Logic Type | Monostable | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | - | - | |
| Voltage - Supply | 4.5 V ~ 15.5 V | - | - | |
| Propagation Delay | 35 ns | - | - | |
| Independent Circuits | 2 | - | - | |
| Schmitt Trigger Input | Yes | - | - | |
| Supplier Device Package | 16-SO | - | - |
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Frequently asked questions
Yes. The NXP HEC4538BT-T is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the NXP HEC4538BT-T are the HEF4538BT-Q100J (Nexperia USA Inc.) and the HEF4538BT,653 (Nexperia USA Inc.), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the HEC4538BT-T are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The HEC4538BT-T (NXP) is a part in the Logic category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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