component
74AHC244BQ
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
74AHC244BQ
Nexperia · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74AHC244BQ 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 | 1OE | input | Active-LOW output enable for outputs 1Y0 to 1Y3; a HIGH level forces these outputs to the high-impedance OFF-state. |
| 2 | 1A0 | input | Data input 1A0 of the first 4-bit buffer section. |
| 3 | 2Y0 | tri_state | 3-state data output 2Y0 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 4 | 1A1 | input | Data input 1A1 of the first 4-bit buffer section. |
| 5 | 2Y1 | tri_state | 3-state data output 2Y1 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 6 | 1A2 | input | Data input 1A2 of the first 4-bit buffer section. |
| 7 | 2Y2 | tri_state | 3-state data output 2Y2 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 8 | 1A3 | input | Data input 1A3 of the first 4-bit buffer section. |
| 9 | 2Y3 | tri_state | 3-state data output 2Y3 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 10 | GND | power_in | Ground (0 V); all voltages are referenced to this pin. |
| 11 | 2A3 | input | Data input 2A3 of the second 4-bit buffer section. |
| 12 | 1Y3 | tri_state | 3-state data output 1Y3 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 13 | 2A2 | input | Data input 2A2 of the second 4-bit buffer section. |
| 14 | 1Y2 | tri_state | 3-state data output 1Y2 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 15 | 2A1 | input | Data input 2A1 of the second 4-bit buffer section. |
| 16 | 1Y1 | tri_state | 3-state data output 1Y1 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 17 | 2A0 | input | Data input 2A0 of the second 4-bit buffer section. |
| 18 | 1Y0 | tri_state | 3-state data output 1Y0 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 19 | 2OE | input | Active-LOW output enable for outputs 2Y0 to 2Y3; a HIGH level forces these outputs to the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage; recommended 2.0 V to 5.5 V for 74AHC244 and 4.5 V to 5.5 V for 74AHCT244, with absolute maximum -0.5 V to +7.0 V. |
| 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 | 2 | 5 | 5.5 | V | 4 | |
| input voltage | VI | 0 | 5.5 | V | 4 | ||
| output voltage | VO | 0 | V | 4 | |||
| ambient temperature | Tamb | -40 | 25 | 125 | °C | 4 | |
| input transition rise and fall rate | Δt/ΔV | 100 | ns/V | VCC = 3.3 V ± 0.3 V | 4 | ||
| input transition rise and fall rate | Δt/ΔV | 20 | ns/V | VCC = 5.0 V ± 0.5 V | 4 | ||
| supply voltage | VCC | -0.5 | 7 | V | 4 | ||
| input voltage | VI | -0.5 | 7 | V | 4 | ||
| input clamping current | IIK | -20 | mA | VI < -0.5 V | 4 | ||
| output clamping current | IOK | -20 | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 4 | |
| output current | IO | -25 | 25 | mA | VO = -0.5 V to VCC + 0.5 V | 4 | |
| supply current | ICC | 75 | mA | 4 | |||
| ground current | IGND | -75 | mA | 4 | |||
| storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| total power dissipation | Ptot | 500 | mW | Tamb = -40 °C to +125 °C | 4 | ||
| propagation delay nAn to nYn | tpd | 5 | 8.4 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; 25 °C | 7 | |
| propagation delay nAn to nYn | tpd | 7 | 11.9 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; 25 °C | 7 | |
| propagation delay nAn to nYn | tpd | 3.4 | 5.5 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; 25 °C | 7 | |
| propagation delay nAn to nYn | tpd | 5 | 7.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; 25 °C | 7 | |
| enable time nOE to nYn | ten | 6.5 | 10.6 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; 25 °C | 7 | |
| enable time nOE to nYn | ten | 7.5 | 14.1 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; 25 °C | 7 | |
| enable time nOE to nYn | ten | 4 | 7.3 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; 25 °C | 7 | |
| enable time nOE to nYn | ten | 5.5 | 9.3 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; 25 °C | 7 | |
| disable time nOE to nYn | tdis | 5.5 | 9.7 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; 25 °C | 7 | |
| disable time nOE to nYn | tdis | 10 | 14 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; 25 °C | 7 | |
| disable time nOE to nYn | tdis | 4.8 | 7.2 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; 25 °C | 7 | |
| disable time nOE to nYn | tdis | 7 | 9.2 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; 25 °C | 7 | |
| propagation delay nAn to nYn | tpd | 1 | 10.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; -40 °C to +125 °C | 7 | |
| propagation delay nAn to nYn | tpd | 1 | 15 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; -40 °C to +125 °C | 7 | |
| propagation delay nAn to nYn | tpd | 1 | 7 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; -40 °C to +125 °C | 7 | |
| propagation delay nAn to nYn | tpd | 1 | 9.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; -40 °C to +125 °C | 7 | |
| enable time nOE to nYn | ten | 1 | 13.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| enable time nOE to nYn | ten | 1 | 18 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| enable time nOE to nYn | ten | 1 | 9.5 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| enable time nOE to nYn | ten | 1 | 12 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| disable time nOE to nYn | tdis | 1 | 12.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| disable time nOE to nYn | tdis | 1 | 17.5 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| disable time nOE to nYn | tdis | 1 | 9 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| disable time nOE to nYn | tdis | 1 | 11.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 | |
| HIGH-level input voltage | VIH | 1.5 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 | ||
| HIGH-level input voltage | VIH | 2.1 | V | VCC = 3.0 V; -40 °C to +125 °C | 5 | ||
| HIGH-level input voltage | VIH | 3.85 | V | VCC = 5.5 V; -40 °C to +125 °C | 5 | ||
| LOW-level input voltage | VIL | 0.5 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 | ||
| LOW-level input voltage | VIL | 0.9 | V | VCC = 3.0 V; -40 °C to +125 °C | 5 | ||
| LOW-level input voltage | VIL | 1.65 | V | VCC = 5.5 V; -40 °C to +125 °C | 5 | ||
| HIGH-level output voltage | VOH | 1.9 | V | VI = VIH or VIL; IO = -50 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 | ||
| HIGH-level output voltage | VOH | 2.9 | V | VI = VIH or VIL; IO = -50 μA; VCC = 3.0 V; -40 °C to +125 °C | 5 | ||
| HIGH-level output voltage | VOH | 4.4 | V | VI = VIH or VIL; IO = -50 μA; VCC = 4.5 V; -40 °C to +125 °C | 5 | ||
| HIGH-level output voltage | VOH | 2.4 | V | VI = VIH or VIL; IO = -4.0 mA; VCC = 3.0 V; -40 °C to +125 °C | 5 | ||
| HIGH-level output voltage | VOH | 3.7 | V | VI = VIH or VIL; IO = -8.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 | ||
| LOW-level output voltage | VOL | 0.1 | V | VI = VIH or VIL; IO = 50 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 | ||
| LOW-level output voltage | VOL | 0.55 | V | VI = VIH or VIL; IO = 4.0 mA; VCC = 3.0 V; -40 °C to +125 °C | 5 | ||
| OFF-state output current | IOZ | -10 | 10 | μA | VI = VIH or VIL; VO = VCC or GND; VCC = 5.5 V; -40 °C to +125 °C | 5 | |
| input leakage current | II | 2 | μA | VI = 5.5 V or GND; VCC = 0 V to 5.5 V; -40 °C to +125 °C | 5 | ||
| supply current | ICC | 80 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; -40 °C to +125 °C | 5 | ||
| input capacitance | CI | 10 | pF | -40 °C to +125 °C | 5 |
CAD (KiCad official)
- Symbol:
74AHC244BQ - 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:
74ahc244bq-etched.step/74ahc244bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74ahc244bq.step/74ahc244bq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (16 pp, sha256
88158be09d84b926, retrieved 2026-10-18, 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).
# 74AHC244BQ
**Nexperia** · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74AHC244BQ 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 | 1OE | input | Active-LOW output enable for outputs 1Y0 to 1Y3; a HIGH level forces these outputs to the high-impedance OFF-state. |
| 2 | 1A0 | input | Data input 1A0 of the first 4-bit buffer section. |
| 3 | 2Y0 | tri_state | 3-state data output 2Y0 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 4 | 1A1 | input | Data input 1A1 of the first 4-bit buffer section. |
| 5 | 2Y1 | tri_state | 3-state data output 2Y1 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 6 | 1A2 | input | Data input 1A2 of the first 4-bit buffer section. |
| 7 | 2Y2 | tri_state | 3-state data output 2Y2 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 8 | 1A3 | input | Data input 1A3 of the first 4-bit buffer section. |
| 9 | 2Y3 | tri_state | 3-state data output 2Y3 of the second 4-bit buffer section; high-impedance when 2OE is HIGH. |
| 10 | GND | power_in | Ground (0 V); all voltages are referenced to this pin. |
| 11 | 2A3 | input | Data input 2A3 of the second 4-bit buffer section. |
| 12 | 1Y3 | tri_state | 3-state data output 1Y3 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 13 | 2A2 | input | Data input 2A2 of the second 4-bit buffer section. |
| 14 | 1Y2 | tri_state | 3-state data output 1Y2 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 15 | 2A1 | input | Data input 2A1 of the second 4-bit buffer section. |
| 16 | 1Y1 | tri_state | 3-state data output 1Y1 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 17 | 2A0 | input | Data input 2A0 of the second 4-bit buffer section. |
| 18 | 1Y0 | tri_state | 3-state data output 1Y0 of the first 4-bit buffer section; high-impedance when 1OE is HIGH. |
| 19 | 2OE | input | Active-LOW output enable for outputs 2Y0 to 2Y3; a HIGH level forces these outputs to the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage; recommended 2.0 V to 5.5 V for 74AHC244 and 4.5 V to 5.5 V for 74AHCT244, with absolute maximum -0.5 V to +7.0 V. |
| 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 | 2 | 5 | 5.5 | V | | 4 |
| input voltage | VI | 0 | | 5.5 | V | | 4 |
| output voltage | VO | 0 | | | V | | 4 |
| ambient temperature | Tamb | -40 | 25 | 125 | °C | | 4 |
| input transition rise and fall rate | Δt/ΔV | | | 100 | ns/V | VCC = 3.3 V ± 0.3 V | 4 |
| input transition rise and fall rate | Δt/ΔV | | | 20 | ns/V | VCC = 5.0 V ± 0.5 V | 4 |
| supply voltage | VCC | -0.5 | | 7 | V | | 4 |
| input voltage | VI | -0.5 | | 7 | V | | 4 |
| input clamping current | IIK | -20 | | | mA | VI < -0.5 V | 4 |
| output clamping current | IOK | -20 | | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 4 |
| output current | IO | -25 | | 25 | mA | VO = -0.5 V to VCC + 0.5 V | 4 |
| supply current | ICC | | | 75 | mA | | 4 |
| ground current | IGND | -75 | | | mA | | 4 |
| storage temperature | Tstg | -65 | | 150 | °C | | 4 |
| total power dissipation | Ptot | | | 500 | mW | Tamb = -40 °C to +125 °C | 4 |
| propagation delay nAn to nYn | tpd | | 5 | 8.4 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; 25 °C | 7 |
| propagation delay nAn to nYn | tpd | | 7 | 11.9 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; 25 °C | 7 |
| propagation delay nAn to nYn | tpd | | 3.4 | 5.5 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; 25 °C | 7 |
| propagation delay nAn to nYn | tpd | | 5 | 7.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; 25 °C | 7 |
| enable time nOE to nYn | ten | | 6.5 | 10.6 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; 25 °C | 7 |
| enable time nOE to nYn | ten | | 7.5 | 14.1 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; 25 °C | 7 |
| enable time nOE to nYn | ten | | 4 | 7.3 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; 25 °C | 7 |
| enable time nOE to nYn | ten | | 5.5 | 9.3 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; 25 °C | 7 |
| disable time nOE to nYn | tdis | | 5.5 | 9.7 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; 25 °C | 7 |
| disable time nOE to nYn | tdis | | 10 | 14 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; 25 °C | 7 |
| disable time nOE to nYn | tdis | | 4.8 | 7.2 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; 25 °C | 7 |
| disable time nOE to nYn | tdis | | 7 | 9.2 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; 25 °C | 7 |
| propagation delay nAn to nYn | tpd | 1 | | 10.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; -40 °C to +125 °C | 7 |
| propagation delay nAn to nYn | tpd | 1 | | 15 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; -40 °C to +125 °C | 7 |
| propagation delay nAn to nYn | tpd | 1 | | 7 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; -40 °C to +125 °C | 7 |
| propagation delay nAn to nYn | tpd | 1 | | 9.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; -40 °C to +125 °C | 7 |
| enable time nOE to nYn | ten | 1 | | 13.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| enable time nOE to nYn | ten | 1 | | 18 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| enable time nOE to nYn | ten | 1 | | 9.5 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| enable time nOE to nYn | ten | 1 | | 12 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| disable time nOE to nYn | tdis | 1 | | 12.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| disable time nOE to nYn | tdis | 1 | | 17.5 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| disable time nOE to nYn | tdis | 1 | | 9 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| disable time nOE to nYn | tdis | 1 | | 11.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; -40 °C to +125 °C | 7 |
| HIGH-level input voltage | VIH | 1.5 | | | V | VCC = 2.0 V; -40 °C to +125 °C | 5 |
| HIGH-level input voltage | VIH | 2.1 | | | V | VCC = 3.0 V; -40 °C to +125 °C | 5 |
| HIGH-level input voltage | VIH | 3.85 | | | V | VCC = 5.5 V; -40 °C to +125 °C | 5 |
| LOW-level input voltage | VIL | | | 0.5 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 |
| LOW-level input voltage | VIL | | | 0.9 | V | VCC = 3.0 V; -40 °C to +125 °C | 5 |
| LOW-level input voltage | VIL | | | 1.65 | V | VCC = 5.5 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 1.9 | | | V | VI = VIH or VIL; IO = -50 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 2.9 | | | V | VI = VIH or VIL; IO = -50 μA; VCC = 3.0 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 4.4 | | | V | VI = VIH or VIL; IO = -50 μA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 2.4 | | | V | VI = VIH or VIL; IO = -4.0 mA; VCC = 3.0 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 3.7 | | | V | VI = VIH or VIL; IO = -8.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| LOW-level output voltage | VOL | | | 0.1 | V | VI = VIH or VIL; IO = 50 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 |
| LOW-level output voltage | VOL | | | 0.55 | V | VI = VIH or VIL; IO = 4.0 mA; VCC = 3.0 V; -40 °C to +125 °C | 5 |
| OFF-state output current | IOZ | -10 | | 10 | μA | VI = VIH or VIL; VO = VCC or GND; VCC = 5.5 V; -40 °C to +125 °C | 5 |
| input leakage current | II | | | 2 | μA | VI = 5.5 V or GND; VCC = 0 V to 5.5 V; -40 °C to +125 °C | 5 |
| supply current | ICC | | | 80 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; -40 °C to +125 °C | 5 |
| input capacitance | CI | | | 10 | pF | -40 °C to +125 °C | 5 |
## CAD (KiCad official)
- Symbol: `74AHC244BQ`
- 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: `74ahc244bq-etched.step` / `74ahc244bq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74ahc244bq.step` / `74ahc244bq.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/8588914722687635456) (16 pp, sha256 `88158be09d84b926`, retrieved 2026-10-18, 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/74ahc244bq-datasheet.pdf)