component
74AHCT541ABQX
Public Made by Adomby adom
Nexperia Buffers, Drivers, Receivers, Transceivers, DHVQFN-20-EP(2.5x4.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
74AHCT541ABQX
Nexperia · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74AHCT541ABQX from Nexperia, in a DHVQFN-20-EP(2.5x4.5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OE1 | input | Output enable input, active LOW; a HIGH on OE1 places outputs Y0 to Y3 in the high-impedance OFF-state. |
| 2 | A0 | input | Data input 0, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 3 | A1 | input | Data input 1, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 4 | A2 | input | Data input 2, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 5 | A3 | input | Data input 3, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 6 | A4 | input | Data input 4, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 7 | A5 | input | Data input 5, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 8 | A6 | input | Data input 6, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 9 | A7 | input | Data input 7, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 10 | GND | power_in | Ground (0 V) reference for the device. |
| 11 | Y7 | tri_state | Data output 7, 3-state; output current limited to ±25 mA. |
| 12 | Y6 | tri_state | Data output 6, 3-state; output current limited to ±25 mA. |
| 13 | Y5 | tri_state | Data output 5, 3-state; output current limited to ±25 mA. |
| 14 | Y4 | tri_state | Data output 4, 3-state; output current limited to ±25 mA. |
| 15 | Y3 | tri_state | Data output 3, 3-state; output current limited to ±25 mA. |
| 16 | Y2 | tri_state | Data output 2, 3-state; output current limited to ±25 mA. |
| 17 | Y1 | tri_state | Data output 1, 3-state; output current limited to ±25 mA. |
| 18 | Y0 | tri_state | Data output 0, 3-state; output current limited to ±25 mA. |
| 19 | OE2 | input | Output enable input, active LOW; a HIGH on OE2 places outputs Y4 to Y7 in the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage, 4.5 V to 5.5 V recommended operating range. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | DHVQFN-20-EP(2.5x4.5) |
| Category | Logic |
| Pins | 21 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 | 7 | V | 3 | ||
| input voltage | VI | -0.5 | 7 | V | 3 | ||
| output voltage active mode | VO | -0.5 | V | active mode; printed max VCC + 0.5 V | 3 | ||
| output voltage power-down or 3-state mode | VO | -0.5 | 7 | V | power-down or 3-state mode | 3 | |
| input clamping current | IIK | -20 | mA | VI < 0 V | 3 | ||
| output clamping current | IOK | -20 | mA | VO < 0 V | 3 | ||
| output current | IO | -25 | 25 | mA | VO = 0 V to VCC | 3 | |
| supply current | ICC | 75 | mA | 3 | |||
| ground current | IGND | -75 | mA | 3 | |||
| storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| total power dissipation | Ptot | 500 | mW | Tamb = -40 °C to +125 °C | 3 | ||
| supply voltage | VCC | 4.5 | 5.5 | V | 4 | ||
| input voltage | VI | 0 | 5.5 | V | 4 | ||
| output voltage active mode | VO | 0 | V | active mode; printed max VCC | 4 | ||
| output voltage power-down or 3-state mode | VO | 0 | 5.5 | V | power-down or 3-state mode | 4 | |
| ambient temperature | Tamb | -40 | 125 | °C | 4 | ||
| input transition rise and fall rate | Δt/ΔV | 20 | ns/V | VCC = 5.0 V ± 0.5 V | 4 | ||
| HIGH-level input voltage | VIH | 2 | V | VCC = 4.5 V to 5.5 V; Tamb = 25 °C | 4 | ||
| LOW-level input voltage | VIL | 0.8 | V | VCC = 4.5 V to 5.5 V; Tamb = 25 °C | 4 | ||
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -50 μA; Tamb = 25 °C | 4 | |
| HIGH-level output voltage | VOH | 4.4 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -50 μA; Tamb = -40 °C to +125 °C | 4 | ||
| HIGH-level output voltage | VOH | 3.94 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -8 mA; Tamb = 25 °C | 4 | ||
| HIGH-level output voltage | VOH | 3.7 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -8 mA; Tamb = -40 °C to +125 °C | 4 | ||
| LOW-level output voltage | VOL | 0 | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 50 μA; Tamb = 25 °C | 4 | |
| LOW-level output voltage | VOL | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 50 μA; Tamb = -40 °C to +125 °C | 4 | ||
| LOW-level output voltage | VOL | 0.36 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 8 mA; Tamb = 25 °C | 4 | ||
| LOW-level output voltage | VOL | 0.55 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 8 mA; Tamb = -40 °C to +125 °C | 4 | ||
| OFF-state output current | IOZ | -0.25 | 0.25 | μA | VCC = 5.5 V; VI = VIH or VIL; VO = GND to 5.5 V; Tamb = 25 °C | 4 | |
| OFF-state output current | IOZ | -2.5 | 2.5 | μA | VCC = 5.5 V; VI = VIH or VIL; VO = GND to 5.5 V; Tamb = -40 °C to +125 °C | 4 | |
| power-off leakage current | IOFF | 0.5 | μA | VI or VO = GND to 5.5 V; VCC = 0 V; Tamb = 25 °C | 4 | ||
| power-off leakage current | IOFF | 5 | μA | VI or VO = GND to 5.5 V; VCC = 0 V; Tamb = -40 °C to +125 °C | 4 | ||
| input leakage current | II | -0.1 | 0.1 | μA | VI = VCC or GND; VCC = 0 V to 5.5 V; Tamb = 25 °C | 4 | |
| input leakage current | II | -1 | 1 | μA | VI = VCC or GND; VCC = 0 V to 5.5 V; Tamb = -40 °C to +125 °C | 4 | |
| supply current | ICC | 2 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; Tamb = 25 °C | 4 | ||
| supply current | ICC | 20 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; Tamb = -40 °C to +125 °C | 4 | ||
| additional supply current | ΔICC | 1.35 | mA | per input pin; VI = 3.4 V; IO = 0 A; VCC = 5.5 V; other pins at VCC or GND; Tamb = 25 °C | 4 | ||
| additional supply current | ΔICC | 1.5 | mA | per input pin; VI = 3.4 V; IO = 0 A; VCC = 5.5 V; other pins at VCC or GND; Tamb = -40 °C to +125 °C | 4 | ||
| propagation delay | tpd | 2.8 | 6.9 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = 25 °C | 5 | |
| propagation delay | tpd | 1 | 8 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = -40 °C to +125 °C | 5 | |
| propagation delay | tpd | 4.4 | 7.9 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 | |
| propagation delay | tpd | 1 | 9 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = -40 °C to +125 °C | 5 | |
| enable time | ten | 3.9 | 11.3 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = 25 °C | 5 | |
| enable time | ten | 1 | 13 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = -40 °C to +125 °C | 5 | |
| enable time | ten | 5.5 | 12.3 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 | |
| enable time | ten | 1 | 14 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = -40 °C to +125 °C | 5 | |
| disable time | tdis | 3.6 | 7.5 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = 25 °C | 5 | |
| disable time | tdis | 1 | 8 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = -40 °C to +125 °C | 5 | |
| disable time | tdis | 5.4 | 11.9 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 | |
| disable time | tdis | 1 | 13.5 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = -40 °C to +125 °C | 5 | |
| skew | tsk(o) | 1 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 | ||
| input capacitance | CI | 2 | 6 | pF | VI = VCC or GND; VCC = 5 V; Tamb = 25 °C | 5 | |
| input capacitance | CI | 6 | pF | VI = VCC or GND; VCC = 5 V; Tamb = -40 °C to +125 °C | 5 | ||
| LOW-level output voltage (peak) | VOL(p) | 0.5 | 1.5 | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 | |
| LOW-level output voltage (valley) | VOL(v) | -1.5 | -0.3 | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 | |
| AC HIGH-level input voltage (dynamic) | VIH(AC) | 2 | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 | ||
| AC LOW-level input voltage (dynamic) | VIL(AC) | 0.8 | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 |
CAD (KiCad official)
- Symbol:
74AHCT541ABQX - Footprint:
Package_DFN_QFN:DHVQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x3mm - 3D model: DHVQFN-20-EP(2.5x4.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal VQFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
74ahct541abqx-etched.step/74ahct541abqx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74ahct541abqx.step/74ahct541abqx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (12 pp, sha256
fa4b5fb8000d1d1f, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# 74AHCT541ABQX
**Nexperia** · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74AHCT541ABQX from Nexperia, in a DHVQFN-20-EP(2.5x4.5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OE1 | input | Output enable input, active LOW; a HIGH on OE1 places outputs Y0 to Y3 in the high-impedance OFF-state. |
| 2 | A0 | input | Data input 0, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 3 | A1 | input | Data input 1, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 4 | A2 | input | Data input 2, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 5 | A3 | input | Data input 3, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 6 | A4 | input | Data input 4, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 7 | A5 | input | Data input 5, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 8 | A6 | input | Data input 6, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 9 | A7 | input | Data input 7, TTL-compatible with Schmitt-trigger action and overvoltage tolerant to 5.5 V. |
| 10 | GND | power_in | Ground (0 V) reference for the device. |
| 11 | Y7 | tri_state | Data output 7, 3-state; output current limited to ±25 mA. |
| 12 | Y6 | tri_state | Data output 6, 3-state; output current limited to ±25 mA. |
| 13 | Y5 | tri_state | Data output 5, 3-state; output current limited to ±25 mA. |
| 14 | Y4 | tri_state | Data output 4, 3-state; output current limited to ±25 mA. |
| 15 | Y3 | tri_state | Data output 3, 3-state; output current limited to ±25 mA. |
| 16 | Y2 | tri_state | Data output 2, 3-state; output current limited to ±25 mA. |
| 17 | Y1 | tri_state | Data output 1, 3-state; output current limited to ±25 mA. |
| 18 | Y0 | tri_state | Data output 0, 3-state; output current limited to ±25 mA. |
| 19 | OE2 | input | Output enable input, active LOW; a HIGH on OE2 places outputs Y4 to Y7 in the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage, 4.5 V to 5.5 V recommended operating range. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | DHVQFN-20-EP(2.5x4.5) |
| Category | Logic |
| Pins | 21 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 | | 7 | V | | 3 |
| input voltage | VI | -0.5 | | 7 | V | | 3 |
| output voltage active mode | VO | -0.5 | | | V | active mode; printed max VCC + 0.5 V | 3 |
| output voltage power-down or 3-state mode | VO | -0.5 | | 7 | V | power-down or 3-state mode | 3 |
| input clamping current | IIK | -20 | | | mA | VI < 0 V | 3 |
| output clamping current | IOK | -20 | | | mA | VO < 0 V | 3 |
| output current | IO | -25 | | 25 | mA | VO = 0 V to VCC | 3 |
| supply current | ICC | | | 75 | mA | | 3 |
| ground current | IGND | -75 | | | mA | | 3 |
| storage temperature | Tstg | -65 | | 150 | °C | | 3 |
| total power dissipation | Ptot | | | 500 | mW | Tamb = -40 °C to +125 °C | 3 |
| supply voltage | VCC | 4.5 | | 5.5 | V | | 4 |
| input voltage | VI | 0 | | 5.5 | V | | 4 |
| output voltage active mode | VO | 0 | | | V | active mode; printed max VCC | 4 |
| output voltage power-down or 3-state mode | VO | 0 | | 5.5 | V | power-down or 3-state mode | 4 |
| ambient temperature | Tamb | -40 | | 125 | °C | | 4 |
| input transition rise and fall rate | Δt/ΔV | | | 20 | ns/V | VCC = 5.0 V ± 0.5 V | 4 |
| HIGH-level input voltage | VIH | 2 | | | V | VCC = 4.5 V to 5.5 V; Tamb = 25 °C | 4 |
| LOW-level input voltage | VIL | | | 0.8 | V | VCC = 4.5 V to 5.5 V; Tamb = 25 °C | 4 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -50 μA; Tamb = 25 °C | 4 |
| HIGH-level output voltage | VOH | 4.4 | | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -50 μA; Tamb = -40 °C to +125 °C | 4 |
| HIGH-level output voltage | VOH | 3.94 | | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -8 mA; Tamb = 25 °C | 4 |
| HIGH-level output voltage | VOH | 3.7 | | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -8 mA; Tamb = -40 °C to +125 °C | 4 |
| LOW-level output voltage | VOL | | 0 | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 50 μA; Tamb = 25 °C | 4 |
| LOW-level output voltage | VOL | | | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 50 μA; Tamb = -40 °C to +125 °C | 4 |
| LOW-level output voltage | VOL | | | 0.36 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 8 mA; Tamb = 25 °C | 4 |
| LOW-level output voltage | VOL | | | 0.55 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 8 mA; Tamb = -40 °C to +125 °C | 4 |
| OFF-state output current | IOZ | -0.25 | | 0.25 | μA | VCC = 5.5 V; VI = VIH or VIL; VO = GND to 5.5 V; Tamb = 25 °C | 4 |
| OFF-state output current | IOZ | -2.5 | | 2.5 | μA | VCC = 5.5 V; VI = VIH or VIL; VO = GND to 5.5 V; Tamb = -40 °C to +125 °C | 4 |
| power-off leakage current | IOFF | | | 0.5 | μA | VI or VO = GND to 5.5 V; VCC = 0 V; Tamb = 25 °C | 4 |
| power-off leakage current | IOFF | | | 5 | μA | VI or VO = GND to 5.5 V; VCC = 0 V; Tamb = -40 °C to +125 °C | 4 |
| input leakage current | II | -0.1 | | 0.1 | μA | VI = VCC or GND; VCC = 0 V to 5.5 V; Tamb = 25 °C | 4 |
| input leakage current | II | -1 | | 1 | μA | VI = VCC or GND; VCC = 0 V to 5.5 V; Tamb = -40 °C to +125 °C | 4 |
| supply current | ICC | | | 2 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; Tamb = 25 °C | 4 |
| supply current | ICC | | | 20 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; Tamb = -40 °C to +125 °C | 4 |
| additional supply current | ΔICC | | | 1.35 | mA | per input pin; VI = 3.4 V; IO = 0 A; VCC = 5.5 V; other pins at VCC or GND; Tamb = 25 °C | 4 |
| additional supply current | ΔICC | | | 1.5 | mA | per input pin; VI = 3.4 V; IO = 0 A; VCC = 5.5 V; other pins at VCC or GND; Tamb = -40 °C to +125 °C | 4 |
| propagation delay | tpd | | 2.8 | 6.9 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = 25 °C | 5 |
| propagation delay | tpd | 1 | | 8 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = -40 °C to +125 °C | 5 |
| propagation delay | tpd | | 4.4 | 7.9 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| propagation delay | tpd | 1 | | 9 | ns | An to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = -40 °C to +125 °C | 5 |
| enable time | ten | | 3.9 | 11.3 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = 25 °C | 5 |
| enable time | ten | 1 | | 13 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = -40 °C to +125 °C | 5 |
| enable time | ten | | 5.5 | 12.3 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| enable time | ten | 1 | | 14 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = -40 °C to +125 °C | 5 |
| disable time | tdis | | 3.6 | 7.5 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = 25 °C | 5 |
| disable time | tdis | 1 | | 8 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 15 pF; Tamb = -40 °C to +125 °C | 5 |
| disable time | tdis | | 5.4 | 11.9 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| disable time | tdis | 1 | | 13.5 | ns | OEn to Yn; VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = -40 °C to +125 °C | 5 |
| skew | tsk(o) | | | 1 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| input capacitance | CI | | 2 | 6 | pF | VI = VCC or GND; VCC = 5 V; Tamb = 25 °C | 5 |
| input capacitance | CI | | | 6 | pF | VI = VCC or GND; VCC = 5 V; Tamb = -40 °C to +125 °C | 5 |
| LOW-level output voltage (peak) | VOL(p) | | 0.5 | 1.5 | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| LOW-level output voltage (valley) | VOL(v) | -1.5 | -0.3 | | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| AC HIGH-level input voltage (dynamic) | VIH(AC) | 2 | | | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 |
| AC LOW-level input voltage (dynamic) | VIL(AC) | | | 0.8 | V | VCC = 5 V; CL = 50 pF; Tamb = 25 °C | 5 |
## CAD (KiCad official)
- Symbol: `74AHCT541ABQX`
- Footprint: `Package_DFN_QFN:DHVQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x3mm`
- 3D model: DHVQFN-20-EP(2.5x4.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal VQFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `74ahct541abqx-etched.step` / `74ahct541abqx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74ahct541abqx.step` / `74ahct541abqx.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588914456483278848) (12 pp, sha256 `fa4b5fb8000d1d1f`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/74ahct541abqx-datasheet.pdf)