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74HC245BQ

Public Made by Adom

by 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.

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74HC245BQ

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74hc245bq.step / 74hc245bq.glb are 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, 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