component
74HC245BM
Public Made by Adomby adom
HGSEMI Buffers, Drivers, Receivers, Transceivers, SOP-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdown74HC245BM
HGSEMI · Buffers, Drivers, Receivers, Transceivers · SOP-20-300mil
74HC245BM from HGSEMI, in a SOP-20-300mil. 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 | Transmission direction control that selects the direction of data transfer between the A and B ports, as defined in the truth table. |
| 2 | A0 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 3 | A1 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 4 | A2 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 5 | A3 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 6 | A4 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 7 | A5 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 8 | A6 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 9 | A7 | bidirectional | Data input/output on the A bus; positive-logic tri-state outputs. |
| 10 | GND | power_in | Ground (0 V) reference. |
| 11 | B7 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 12 | B6 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 13 | B5 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 14 | B4 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 15 | B3 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 16 | B2 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 17 | B1 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 18 | B0 | bidirectional | Data input/output on the B bus; positive-logic tri-state outputs. |
| 19 | OE | input | Active-low output enable; when high, the A and B ports are placed in high impedance (Z). The overline is lost in the text extraction, so the name is shown without it. |
| 20 | VCC | power_in | Power supply voltage; recommended operating range 2.0 V to 6.0 V, absolute maximum 7.0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-20-300mil |
| Category | Logic |
| Pins | 20 |
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 clamp current | Ilk | -20 | 20 | mA | VI<-0.5V or VI>Vcc+0.5V | 4 | |
| Output clamp current | Iok | -20 | 20 | mA | Vo<-0.5V or Vo>Vcc+0.5V | 4 | |
| Output or input/output current | Io | -35 | 35 | mA | -0.5V<Vo<Vcc+0.5V | 4 | |
| VCC or GND current | ICC,IGND | -70 | 70 | mA | 4 | ||
| Storage temperature | Tstg | -65 | 150 | ℃ | 4 | ||
| Power dissipation (SOP-20W package) | PD | 500 | mW | SOP-20W package | 4 | ||
| Soldering temperature | TL | 245 | ℃ | 10 s, SOP | 4 | ||
| Supply voltage | VCC | 2 | 5 | 6 | V | 4 | |
| Input voltage | VI | 0 | V | 4 | |||
| Output voltage | Vo | 0 | V | 4 | |||
| Operating ambient temperature | Tamb | -40 | 85 | ℃ | 4 | ||
| Input rise and fall time | tr ,tf | 625 | ns | VCC=2.0V | 4 | ||
| Input rise and fall time | tr ,tf | 139 | ns | VCC=4.5V | 4 | ||
| Input rise and fall time | tr ,tf | 83 | ns | VCC=6.0V | 4 | ||
| High-level input voltage | VIH | 1.5 | 1.2 | V | Tamb=25℃, GND=0; VCC=2.0V | 4 | |
| High-level input voltage | VIH | 3.15 | 2.4 | V | Tamb=25℃, GND=0; VCC=4.5V | 4 | |
| High-level input voltage | VIH | 4.2 | 3.2 | V | Tamb=25℃, GND=0; VCC=6.0V | 4 | |
| Low-level input voltage | VIL | 0.8 | 0.5 | V | Tamb=25℃, GND=0; VCC=2.0V | 4 | |
| Low-level input voltage | VIL | 2.1 | 1.35 | V | Tamb=25℃, GND=0; VCC=4.5V | 4 | |
| Low-level input voltage | VIL | 2.8 | 1.8 | V | Tamb=25℃, GND=0; VCC=6.0V | 4 | |
| High-level output voltage | VOH | 1.9 | 2 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=2.0V, IO=-20uA | 4 | |
| High-level output voltage | VOH | 4.4 | 4.5 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=4.5V, IO=-20uA | 4 | |
| High-level output voltage | VOH | 5.9 | 6 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=6.0V, IO=-20uA | 5 | |
| High-level output voltage | VOH | 3.98 | 4.32 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=4.5V, IO=-6.0mA | 5 | |
| High-level output voltage | VOH | 5.48 | 5.81 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=6.0V, IO=-4mA | 5 | |
| Low-level output voltage | VOL | 0 | 0.1 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=2.0V, IO=20uA | 5 | |
| Low-level output voltage | VOL | 0.15 | 0.26 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=4.5V, IO=6.0mA | 5 | |
| Low-level output voltage | VOL | 0.16 | 0.26 | V | Tamb=25℃, GND=0; VI=VIH or VIL, VCC=6.0V, IO=4mA | 5 | |
| Input leakage current | ILI | -1 | 0.1 | 1 | uA | Tamb=25℃, GND=0; VI=VCC or GND, VCC=6.0V | 5 |
| Off-state output current | IOZ | -0.5 | 0.5 | uA | Tamb=25℃, GND=0; VI=VIH or VIL, Vo=VCC or GND, VCC=6.0V | 5 | |
| Quiescent supply current | ICC | -1 | 10 | uA | Tamb=25℃, GND=0; VI=VCC or GND, VCC=6.0V, IO=0 | 5 | |
| High-level input voltage | VIH | 1.5 | V | Tamb=-40 to +85℃, GND=0; VCC=2.0V | 5 | ||
| High-level input voltage | VIH | 3.15 | V | Tamb=-40 to +85℃, GND=0; VCC=4.5V | 5 | ||
| High-level input voltage | VIH | 4.2 | V | Tamb=-40 to +85℃, GND=0; VCC=6.0V | 5 | ||
| Low-level input voltage | VIL | 0.5 | V | Tamb=-40 to +85℃, GND=0; VCC=2.0V | 5 | ||
| Low-level input voltage | VIL | 1.35 | V | Tamb=-40 to +85℃, GND=0; VCC=4.5V | 5 | ||
| Low-level input voltage | VIL | 1.8 | V | Tamb=-40 to +85℃, GND=0; VCC=6.0V | 5 | ||
| High-level output voltage | VOH | 1.9 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=2.0V, IO=-20uA | 5 | ||
| High-level output voltage | VOH | 4.4 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=4.5V, IO=-20uA | 5 | ||
| High-level output voltage | VOH | 5.9 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=6.0V, IO=-20uA | 5 | ||
| High-level output voltage | VOH | 3.84 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=4.5V, IO=-6.0mA | 5 | ||
| High-level output voltage | VOH | 5.34 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=6.0V, IO=-7.8mA | 5 | ||
| Low-level output voltage | VOL | 0.1 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=2.0V, IO=20uA | 5 | ||
| Low-level output voltage | VOL | 0.33 | V | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, VCC=4.5V, IO=6.0mA | 5 | ||
| Input leakage current | ILI | -1 | 1 | uA | Tamb=-40 to +85℃, GND=0; VI=VCC or GND, VCC=6.0V | 5 | |
| Off-state output current | IOZ | -5 | 5 | uA | Tamb=-40 to +85℃, GND=0; VI=VIH or VIL, Vo=VCC or GND, VCC=6.0V | 5 | |
| Quiescent supply current | ICC | 80 | uA | Tamb=-40 to +85℃, GND=0; VI=VCC or GND, VCC=6.0V, IO=0 | 5 | ||
| Propagation delay An to Bn or Bn to An | tPHL/tPLH | 25 | 900 | ns | Tamb=25℃, GND=0, tr=tf=6.0ns, CL=50pF; VCC=2.0V, see Fig.4 | 6 | |
| Propagation delay An to Bn or Bn to An | tPHL/tPLH | 9 | 18 | ns | Tamb=25℃, GND=0, tr=tf=6.0ns, CL=50pF; VCC=4.5V, see Fig.4 | 6 | |
| Propagation delay An to Bn or Bn to An | tPHL/tPLH | 7 | 15 | ns | Tamb=25℃, GND=0, tr=tf=6.0ns, CL=50pF; VCC=6.0V, see Fig.4 | 6 | |
| Propagation delay An to Bn or Bn to An | tPHL/tPLH | 115 | ns | Tamb=-40 to +85℃, GND=0, tr=tf=6.0ns, CL=50pF; VCC=2.0V, see Fig.4 | 7 | ||
| Propagation delay An to Bn or Bn to An | tPHL/tPLH | 23 | ns | Tamb=-40 to +85℃, GND=0, tr=tf=6.0ns, CL=50pF; VCC=4.5V, see Fig.4 | 7 | ||
| Propagation delay An to Bn or Bn to An | tPHL/tPLH | 20 | ns | Tamb=-40 to +85℃, GND=0, tr=tf=6.0ns, CL=50pF; VCC=6.0V, see Fig.4 | 7 |
CAD (KiCad official)
- Symbol:
74HC245BM - Footprint:
Package_SO:SOP-20_7.5x12.8mm_P1.27mm - 3D model: SOP-20-300mil, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 2.65 mm nominal SOIC 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:
74hc245bm-etched.step/74hc245bm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc245bm.step/74hc245bm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (13 pp, sha256
3809a15d1ae8f70c, retrieved 2026-10-19, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).