component
74HCT245BQ
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
74HCT245BQ
Nexperia · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74HCT245BQ 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 | DIR | input | Direction control input that sets the transfer direction between the A and B ports as defined in the function table (Table 3). |
| 2 | A0 | bidirectional | Data input/output A0 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 3 | A1 | bidirectional | Data input/output A1 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 4 | A2 | bidirectional | Data input/output A2 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 5 | A3 | bidirectional | Data input/output A3 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 6 | A4 | bidirectional | Data input/output A4 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 7 | A5 | bidirectional | Data input/output A5 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 8 | A6 | bidirectional | Data input/output A6 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 9 | A7 | bidirectional | Data input/output A7 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 10 | GND | power_in | Ground (0 V) reference pin for the device. |
| 11 | B7 | bidirectional | Data input/output B7 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 12 | B6 | bidirectional | Data input/output B6 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 13 | B5 | bidirectional | Data input/output B5 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 14 | B4 | bidirectional | Data input/output B4 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 15 | B3 | bidirectional | Data input/output B3 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 16 | B2 | bidirectional | Data input/output B2 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 17 | B1 | bidirectional | Data input/output B1 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 18 | B0 | bidirectional | Data input/output B0 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 19 | OE | input | Output enable input, active LOW; a HIGH level forces the A and B outputs into the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage: 2.0 V to 6.0 V recommended for 74HC245 and 4.5 V to 5.5 V for 74HCT245; absolute maximum rating is -0.5 V to +7 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 (absolute maximum) | VCC | -0.5 | 7 | V | 4 | ||
| input clamping current | IIK | -20 | 20 | mA | VI < -0.5 V or VI > VCC + 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 | -35 | 35 | mA | -0.5 V < VO < VCC + 0.5 V | 4 | |
| supply current | ICC | 70 | mA | 4 | |||
| ground current | IGND | -70 | mA | 4 | |||
| storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| total power dissipation | Ptot | 500 | mW | Note [1]: SOT764-1 (DHVQFN20) derates linearly 12.9 mW/K above 111 °C | 4 | ||
| supply voltage (74HCT245) | VCC | 4.5 | 5 | 5.5 | V | 74HCT245 column | 4 |
| input voltage (74HCT245) | VI | 0 | V | 74HCT245 column; maximum printed as VCC | 4 | ||
| input transition rise and fall rate (74HCT245) | Δt/ΔV | 1.67 | 139 | ns/V | VCC = 4.5 V; 74HCT245 column | 4 | |
| ambient temperature (74HCT245) | Tamb | -40 | 25 | 125 | °C | 74HCT245 column | 4 |
| HIGH-level input voltage | VIH | 2 | 1.6 | V | VCC = 4.5 V to 5.5 V; 25 °C | 6 | |
| HIGH-level input voltage | VIH | 2 | V | VCC = 4.5 V to 5.5 V; -40 °C to +85 °C | 6 | ||
| LOW-level input voltage | VIL | 1.2 | 0.8 | V | VCC = 4.5 V to 5.5 V; 25 °C | 6 | |
| LOW-level input voltage | VIL | 0.8 | V | VCC = 4.5 V to 5.5 V; -40 °C to +85 °C | 6 | ||
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -20 μA; 25 °C | 6 | |
| HIGH-level output voltage | VOH | 4.4 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -20 μA; -40 °C to +85 °C | 6 | ||
| HIGH-level output voltage | VOH | 3.98 | 4.32 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -6 mA; 25 °C | 6 | |
| HIGH-level output voltage | VOH | 3.84 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -6 mA; -40 °C to +85 °C | 6 | ||
| HIGH-level output voltage | VOH | 3.7 | V | VI = VIH or VIL; VCC = 4.5 V; IO = -6 mA; -40 °C to +125 °C | 6 | ||
| LOW-level output voltage | VOL | 0 | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 20 μA; 25 °C | 6 | |
| LOW-level output voltage | VOL | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 20 μA; -40 °C to +85 °C | 6 | ||
| LOW-level output voltage | VOL | 0.15 | 0.26 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 6.0 mA; 25 °C | 6 | |
| LOW-level output voltage | VOL | 0.33 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 6.0 mA; -40 °C to +85 °C | 6 | ||
| LOW-level output voltage | VOL | 0.4 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 6.0 mA; -40 °C to +125 °C | 6 | ||
| input leakage current | II | -0.1 | 0.1 | μA | VI = VCC or GND; VCC = 5.5 V; 25 °C | 6 | |
| input leakage current | II | -1 | 1 | μA | VI = VCC or GND; VCC = 5.5 V; -40 °C to +85 °C | 6 | |
| OFF-state output current | IOZ | -0.5 | 0.5 | μA | VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND; 25 °C | 6 | |
| OFF-state output current | IOZ | -5 | 5 | μA | VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND; -40 °C to +85 °C | 6 | |
| OFF-state output current | IOZ | -10 | 10 | μA | VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND; -40 °C to +125 °C | 6 | |
| supply current | ICC | 8 | μA | VI = VCC or GND; VCC = 5.5 V; IO = 0 A; 25 °C | 6 | ||
| supply current | ICC | 80 | μA | VI = VCC or GND; VCC = 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 | ||
| supply current | ICC | 160 | μA | VI = VCC or GND; VCC = 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 | ||
| additional supply current, An or Bn inputs | ΔICC | 40 | 144 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; 25 °C | 6 | |
| additional supply current, An or Bn inputs | ΔICC | 180 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 | ||
| additional supply current, An or Bn inputs | ΔICC | 196 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 | ||
| additional supply current, OE input | ΔICC | 150 | 540 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; 25 °C | 6 | |
| additional supply current, OE input | ΔICC | 675 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 | ||
| additional supply current, OE input | ΔICC | 735 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 | ||
| additional supply current, DIR input | ΔICC | 90 | 324 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; 25 °C | 6 | |
| additional supply current, DIR input | ΔICC | 405 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 | ||
| additional supply current, DIR input | ΔICC | 441 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 | ||
| propagation delay An to Bn or Bn to An | tpd | 12 | 22 | ns | VCC = 4.5 V; see Fig. 5; 25 °C | 7 | |
| propagation delay An to Bn or Bn to An | tpd | 28 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +85 °C | 7 | ||
| propagation delay An to Bn or Bn to An | tpd | 33 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +125 °C | 7 | ||
| enable time OE to An or Bn | ten | 16 | 30 | ns | see Fig. 6; 25 °C | 7 | |
| enable time OE to An or Bn | ten | 38 | ns | see Fig. 6; -40 °C to +85 °C | 7 | ||
| enable time OE to An or Bn | ten | 45 | ns | see Fig. 6; -40 °C to +125 °C | 7 | ||
| disable time OE to An or Bn | tdis | 16 | 30 | ns | see Fig. 6; 25 °C | 7 | |
| disable time OE to An or Bn | tdis | 38 | ns | see Fig. 6; -40 °C to +85 °C | 7 | ||
| disable time OE to An or Bn | tdis | 45 | ns | see Fig. 6; -40 °C to +125 °C | 7 | ||
| transition time | tt | 5 | 12 | ns | VCC = 4.5 V; see Fig. 5; 25 °C | 7 | |
| transition time | tt | 15 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +85 °C | 7 | ||
| transition time | tt | 18 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +125 °C | 7 |
CAD (KiCad official)
- Symbol:
74HCT245BQ - 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:
74hct245bq-etched.step/74hct245bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hct245bq.step/74hct245bq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (15 pp, sha256
ff2562c806a0fc87, retrieved 2026-10-20, 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).
# 74HCT245BQ
**Nexperia** · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74HCT245BQ 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 | DIR | input | Direction control input that sets the transfer direction between the A and B ports as defined in the function table (Table 3). |
| 2 | A0 | bidirectional | Data input/output A0 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 3 | A1 | bidirectional | Data input/output A1 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 4 | A2 | bidirectional | Data input/output A2 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 5 | A3 | bidirectional | Data input/output A3 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 6 | A4 | bidirectional | Data input/output A4 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 7 | A5 | bidirectional | Data input/output A5 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 8 | A6 | bidirectional | Data input/output A6 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 9 | A7 | bidirectional | Data input/output A7 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 10 | GND | power_in | Ground (0 V) reference pin for the device. |
| 11 | B7 | bidirectional | Data input/output B7 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 12 | B6 | bidirectional | Data input/output B6 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 13 | B5 | bidirectional | Data input/output B5 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 14 | B4 | bidirectional | Data input/output B4 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 15 | B3 | bidirectional | Data input/output B3 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 16 | B2 | bidirectional | Data input/output B2 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 17 | B1 | bidirectional | Data input/output B1 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 18 | B0 | bidirectional | Data input/output B0 is a non-inverting 3-state port that goes to high-impedance OFF-state when OE is HIGH. |
| 19 | OE | input | Output enable input, active LOW; a HIGH level forces the A and B outputs into the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage: 2.0 V to 6.0 V recommended for 74HC245 and 4.5 V to 5.5 V for 74HCT245; absolute maximum rating is -0.5 V to +7 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 (absolute maximum) | VCC | -0.5 | | 7 | V | | 4 |
| input clamping current | IIK | -20 | | 20 | mA | VI < -0.5 V or VI > VCC + 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 | -35 | | 35 | mA | -0.5 V < VO < VCC + 0.5 V | 4 |
| supply current | ICC | | | 70 | mA | | 4 |
| ground current | IGND | -70 | | | mA | | 4 |
| storage temperature | Tstg | -65 | | 150 | °C | | 4 |
| total power dissipation | Ptot | | | 500 | mW | Note [1]: SOT764-1 (DHVQFN20) derates linearly 12.9 mW/K above 111 °C | 4 |
| supply voltage (74HCT245) | VCC | 4.5 | 5 | 5.5 | V | 74HCT245 column | 4 |
| input voltage (74HCT245) | VI | 0 | | | V | 74HCT245 column; maximum printed as VCC | 4 |
| input transition rise and fall rate (74HCT245) | Δt/ΔV | | 1.67 | 139 | ns/V | VCC = 4.5 V; 74HCT245 column | 4 |
| ambient temperature (74HCT245) | Tamb | -40 | 25 | 125 | °C | 74HCT245 column | 4 |
| HIGH-level input voltage | VIH | 2 | 1.6 | | V | VCC = 4.5 V to 5.5 V; 25 °C | 6 |
| HIGH-level input voltage | VIH | 2 | | | V | VCC = 4.5 V to 5.5 V; -40 °C to +85 °C | 6 |
| LOW-level input voltage | VIL | | 1.2 | 0.8 | V | VCC = 4.5 V to 5.5 V; 25 °C | 6 |
| LOW-level input voltage | VIL | | | 0.8 | V | VCC = 4.5 V to 5.5 V; -40 °C to +85 °C | 6 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -20 μA; 25 °C | 6 |
| HIGH-level output voltage | VOH | 4.4 | | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -20 μA; -40 °C to +85 °C | 6 |
| HIGH-level output voltage | VOH | 3.98 | 4.32 | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -6 mA; 25 °C | 6 |
| HIGH-level output voltage | VOH | 3.84 | | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -6 mA; -40 °C to +85 °C | 6 |
| HIGH-level output voltage | VOH | 3.7 | | | V | VI = VIH or VIL; VCC = 4.5 V; IO = -6 mA; -40 °C to +125 °C | 6 |
| LOW-level output voltage | VOL | | 0 | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 20 μA; 25 °C | 6 |
| LOW-level output voltage | VOL | | | 0.1 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 20 μA; -40 °C to +85 °C | 6 |
| LOW-level output voltage | VOL | | 0.15 | 0.26 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 6.0 mA; 25 °C | 6 |
| LOW-level output voltage | VOL | | | 0.33 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 6.0 mA; -40 °C to +85 °C | 6 |
| LOW-level output voltage | VOL | | | 0.4 | V | VI = VIH or VIL; VCC = 4.5 V; IO = 6.0 mA; -40 °C to +125 °C | 6 |
| input leakage current | II | -0.1 | | 0.1 | μA | VI = VCC or GND; VCC = 5.5 V; 25 °C | 6 |
| input leakage current | II | -1 | | 1 | μA | VI = VCC or GND; VCC = 5.5 V; -40 °C to +85 °C | 6 |
| OFF-state output current | IOZ | -0.5 | | 0.5 | μA | VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND; 25 °C | 6 |
| OFF-state output current | IOZ | -5 | | 5 | μA | VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND; -40 °C to +85 °C | 6 |
| OFF-state output current | IOZ | -10 | | 10 | μA | VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND; -40 °C to +125 °C | 6 |
| supply current | ICC | | | 8 | μA | VI = VCC or GND; VCC = 5.5 V; IO = 0 A; 25 °C | 6 |
| supply current | ICC | | | 80 | μA | VI = VCC or GND; VCC = 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 |
| supply current | ICC | | | 160 | μA | VI = VCC or GND; VCC = 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 |
| additional supply current, An or Bn inputs | ΔICC | | 40 | 144 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; 25 °C | 6 |
| additional supply current, An or Bn inputs | ΔICC | | | 180 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 |
| additional supply current, An or Bn inputs | ΔICC | | | 196 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 |
| additional supply current, OE input | ΔICC | | 150 | 540 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; 25 °C | 6 |
| additional supply current, OE input | ΔICC | | | 675 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 |
| additional supply current, OE input | ΔICC | | | 735 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 |
| additional supply current, DIR input | ΔICC | | 90 | 324 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; 25 °C | 6 |
| additional supply current, DIR input | ΔICC | | | 405 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +85 °C | 6 |
| additional supply current, DIR input | ΔICC | | | 441 | μA | VI = VCC - 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A; -40 °C to +125 °C | 6 |
| propagation delay An to Bn or Bn to An | tpd | | 12 | 22 | ns | VCC = 4.5 V; see Fig. 5; 25 °C | 7 |
| propagation delay An to Bn or Bn to An | tpd | | | 28 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +85 °C | 7 |
| propagation delay An to Bn or Bn to An | tpd | | | 33 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +125 °C | 7 |
| enable time OE to An or Bn | ten | | 16 | 30 | ns | see Fig. 6; 25 °C | 7 |
| enable time OE to An or Bn | ten | | | 38 | ns | see Fig. 6; -40 °C to +85 °C | 7 |
| enable time OE to An or Bn | ten | | | 45 | ns | see Fig. 6; -40 °C to +125 °C | 7 |
| disable time OE to An or Bn | tdis | | 16 | 30 | ns | see Fig. 6; 25 °C | 7 |
| disable time OE to An or Bn | tdis | | | 38 | ns | see Fig. 6; -40 °C to +85 °C | 7 |
| disable time OE to An or Bn | tdis | | | 45 | ns | see Fig. 6; -40 °C to +125 °C | 7 |
| transition time | tt | | 5 | 12 | ns | VCC = 4.5 V; see Fig. 5; 25 °C | 7 |
| transition time | tt | | | 15 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +85 °C | 7 |
| transition time | tt | | | 18 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +125 °C | 7 |
## CAD (KiCad official)
- Symbol: `74HCT245BQ`
- 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: `74hct245bq-etched.step` / `74hct245bq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74hct245bq.step` / `74hct245bq.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/8588914198047178752) (15 pp, sha256 `ff2562c806a0fc87`, retrieved 2026-10-20, 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/74hct245bq-datasheet.pdf)