component
74HC245BQ
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown74HC245BQ
Nexperia · Buffers, Drivers, Receivers, Transceivers · DHVQFN-20-EP(2.5x4.5)
74HC245BQ 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 selects the transfer direction between the A and B ports as set out in the function table. |
| 2 | A0 | bidirectional | Data input/output A0, which is forced to high-impedance (Z) when OE is HIGH. |
| 3 | A1 | bidirectional | Data input/output A1, which is forced to high-impedance (Z) when OE is HIGH. |
| 4 | A2 | bidirectional | Data input/output A2, which is forced to high-impedance (Z) when OE is HIGH. |
| 5 | A3 | bidirectional | Data input/output A3, which is forced to high-impedance (Z) when OE is HIGH. |
| 6 | A4 | bidirectional | Data input/output A4, which is forced to high-impedance (Z) when OE is HIGH. |
| 7 | A5 | bidirectional | Data input/output A5, which is forced to high-impedance (Z) when OE is HIGH. |
| 8 | A6 | bidirectional | Data input/output A6, which is forced to high-impedance (Z) when OE is HIGH. |
| 9 | A7 | bidirectional | Data input/output A7, which is forced to high-impedance (Z) when OE is HIGH. |
| 10 | GND | power_in | Ground (0 V) reference for all voltages on the device. |
| 11 | B7 | bidirectional | Data input/output B7, which is forced to high-impedance (Z) when OE is HIGH. |
| 12 | B6 | bidirectional | Data input/output B6, which is forced to high-impedance (Z) when OE is HIGH. |
| 13 | B5 | bidirectional | Data input/output B5, which is forced to high-impedance (Z) when OE is HIGH. |
| 14 | B4 | bidirectional | Data input/output B4, which is forced to high-impedance (Z) when OE is HIGH. |
| 15 | B3 | bidirectional | Data input/output B3, which is forced to high-impedance (Z) when OE is HIGH. |
| 16 | B2 | bidirectional | Data input/output B2, which is forced to high-impedance (Z) when OE is HIGH. |
| 17 | B1 | bidirectional | Data input/output B1, which is forced to high-impedance (Z) when OE is HIGH. |
| 18 | B0 | bidirectional | Data input/output B0, which is forced to high-impedance (Z) when OE is HIGH. |
| 19 | OE | input | Output enable input (active LOW); a HIGH level causes all outputs to assume the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage, recommended 2.0 V to 6.0 V for 74HC245 and 4.5 V to 5.5 V for 74HCT245, with an absolute maximum of +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 | 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 | 4 | |||
| supply voltage | VCC | 2 | 5 | 6 | V | 74HC245 | 4 |
| input voltage | VI | 0 | V | 4 | |||
| output voltage | VO | 0 | V | 4 | |||
| input transition rise and fall rate | Δt/ΔV | 625 | ns/V | VCC = 2.0 V | 4 | ||
| input transition rise and fall rate | Δt/ΔV | 1.67 | 139 | ns/V | VCC = 4.5 V | 4 | |
| input transition rise and fall rate | Δt/ΔV | 83 | ns/V | VCC = 6.0 V | 4 | ||
| ambient temperature | Tamb | -40 | 25 | 125 | °C | 4 | |
| HIGH-level input voltage | VIH | 1.5 | 1.2 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 | |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | V | VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | V | VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| LOW-level input voltage | VIL | 0.8 | 0.5 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 | |
| LOW-level input voltage | VIL | 2.1 | 1.35 | V | VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| LOW-level input voltage | VIL | 2.8 | 1.8 | V | VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 1.9 | 2 | V | IO = -20 μA; VCC = 2.0 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | IO = -20 μA; VCC = 4.5 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 5.9 | 6 | V | IO = -20 μA; VCC = 6.0 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 3.7 | 4.32 | V | IO = -6.0 mA; VCC = 4.5 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 5.2 | 5.81 | V | IO = -7.8 mA; VCC = 6.0 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| LOW-level output voltage | VOL | 0 | 0.1 | V | IO = 20 μA; VCC = 2.0 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| LOW-level output voltage | VOL | 0.15 | 0.4 | V | IO = 6.0 mA; VCC = 4.5 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| LOW-level output voltage | VOL | 0.16 | 0.4 | V | IO = 7.8 mA; VCC = 6.0 V; VI = VIH or VIL; -40 °C to +125 °C | 5 | |
| input leakage current | II | -1 | 1 | μA | VI = VCC or GND; VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| OFF-state output current | IOZ | -10 | 10 | μA | VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND; -40 °C to +125 °C | 5 | |
| supply current | ICC | 160 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; -40 °C to +125 °C | 5 | ||
| propagation delay An to Bn or Bn to An | tpd | 25 | 135 | ns | VCC = 2.0 V; see Fig. 5; -40 °C to +125 °C | 7 | |
| propagation delay An to Bn or Bn to An | tpd | 9 | 27 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +125 °C | 7 | |
| propagation delay An to Bn or Bn to An | tpd | 7 | 23 | ns | VCC = 6.0 V; see Fig. 5; -40 °C to +125 °C | 7 | |
| enable time OE to An or Bn | ten | 30 | 225 | ns | VCC = 2.0 V; see Fig. 6; -40 °C to +125 °C | 7 | |
| enable time OE to An or Bn | ten | 11 | 45 | ns | VCC = 4.5 V; see Fig. 6; -40 °C to +125 °C | 7 | |
| enable time OE to An or Bn | ten | 9 | 38 | ns | VCC = 6.0 V; see Fig. 6; -40 °C to +125 °C | 7 | |
| disable time OE to An or Bn | tdis | 41 | 225 | ns | VCC = 2.0 V; see Fig. 6; -40 °C to +125 °C | 7 | |
| disable time OE to An or Bn | tdis | 15 | 45 | ns | VCC = 4.5 V; see Fig. 6; -40 °C to +125 °C | 7 | |
| disable time OE to An or Bn | tdis | 12 | 38 | ns | VCC = 6.0 V; see Fig. 6; -40 °C to +125 °C | 7 | |
| transition time | tt | 14 | 90 | ns | VCC = 2.0 V; see Fig. 5; -40 °C to +125 °C | 7 | |
| transition time | tt | 5 | 18 | ns | VCC = 4.5 V; see Fig. 5; -40 °C to +125 °C | 7 | |
| transition time | tt | 4 | 15 | ns | VCC = 6.0 V; see Fig. 5; -40 °C to +125 °C | 7 |
CAD (KiCad official)
- Symbol:
74HC245BQ - Footprint:
Package_DFN_QFN:DHVQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x3mm - 3D model: DHVQFN-20-EP(2.5x4.5) (KiCad packages3D, STEP)
- 3D model files:
74hc245bq-etched.step/74hc245bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc245bq.step/74hc245bq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (15 pp, sha256
ff2562c806a0fc87, retrieved 2026-10-27, tier: manufacturer) - 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).