component
SN74HC244D
Public Made by Adomby adom
lingxingic Buffers, Drivers, Receivers, Transceivers, SOP-20-300mil. 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
markdownSN74HC244D
lingxingic · Buffers, Drivers, Receivers, Transceivers · SOP-20-300mil
SN74HC244D from lingxingic, 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 | 1OE | input | Active-low output enable for the 1Yn three-state outputs; a high level puts the outputs in high-impedance state. |
| 2 | 1A0 | input | Data input 1A0 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 3 | 2Y0 | tri_state | Three-state bus output 2Y0; high-impedance when its output enable is high. |
| 4 | 1A1 | input | Data input 1A1 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 5 | 2Y1 | tri_state | Three-state bus output 2Y1; high-impedance when its output enable is high. |
| 6 | 1A2 | input | Data input 1A2 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 7 | 2Y2 | tri_state | Three-state bus output 2Y2; high-impedance when its output enable is high. |
| 8 | 1A3 | input | Data input 1A3 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 9 | 2Y3 | tri_state | Three-state bus output 2Y3; high-impedance when its output enable is high. |
| 10 | GND | power_in | Ground reference (0 V). |
| 11 | 2A3 | input | Data input 2A3 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 12 | 1Y3 | tri_state | Three-state bus output 1Y3; high-impedance when its output enable is high. |
| 13 | 2A2 | input | Data input 2A2 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 14 | 1Y2 | tri_state | Three-state bus output 1Y2; high-impedance when its output enable is high. |
| 15 | 2A1 | input | Data input 2A1 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 16 | 1Y1 | tri_state | Three-state bus output 1Y1; high-impedance when its output enable is high. |
| 17 | 2A0 | input | Data input 2A0 with built-in clamp diodes; input voltage range is 0 to VCC. |
| 18 | 1Y0 | tri_state | Three-state bus output 1Y0; high-impedance when its output enable is high. |
| 19 | 2OE | input | Active-low output enable for the 2Yn three-state outputs; a high level puts the outputs in high-impedance state. |
| 20 | VCC | power_in | Supply voltage: 2.0 V to 6.0 V for SN74HC244 and 4.5 V to 5.5 V for SN74HCT244 (absolute maximum 7.0 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| 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 | VCC | -0.5 | 7 | V | 6 | ||
| Input clamp current | IIK | -20 | 20 | mA | VI<-0.5V or VI>VCC+0.5V | 6 | |
| Output clamp current | IOK | -20 | 20 | mA | VO<-0.5V or VO>VCC+0.5V | 6 | |
| Output current | IO | -35 | 35 | mA | -0.5V<VO<VCC+0.5V | 6 | |
| Supply current | ICC | 70 | mA | 6 | |||
| Ground current | IGND | -70 | mA | 6 | |||
| Storage temperature | Tstg | -65 | 150 | ℃ | 6 | ||
| Total power dissipation | Ptot | 500 | mW | 6 | |||
| Soldering temperature | TL | 260 | ℃ | 10 s; SOP/TSSOP/SOP(M) | 6 | ||
| Supply voltage (recommended) | VCC | 2 | 5 | 6 | V | SN74HC244 | 6 |
| Input voltage | VI | 0 | V | max printed as VCC | 6 | ||
| Output voltage | VO | 0 | V | max printed as VCC | 6 | ||
| Input rise and fall rate | Δt/ΔV | 625 | ns/V | VCC=2.0V | 6 | ||
| Input rise and fall rate | Δt/ΔV | 1.67 | 139 | ns/V | VCC=4.5V | 6 | |
| Input rise and fall rate | Δt/ΔV | 83 | ns/V | VCC=6.0V | 6 | ||
| Operating ambient temperature | Tamb | -40 | 125 | ℃ | 6 | ||
| High-level input voltage | VIH | 1.5 | V | Tamb=-40℃～+125℃; VCC=2.0V | 9 | ||
| High-level input voltage | VIH | 3.15 | V | Tamb=-40℃～+125℃; VCC=4.5V | 9 | ||
| High-level input voltage | VIH | 4.2 | V | Tamb=-40℃～+125℃; VCC=6.0V | 9 | ||
| Low-level input voltage | VIL | 0.5 | V | Tamb=-40℃～+125℃; VCC=2.0V | 9 | ||
| Low-level input voltage | VIL | 1.35 | V | Tamb=-40℃～+125℃; VCC=4.5V | 9 | ||
| Low-level input voltage | VIL | 1.8 | V | Tamb=-40℃～+125℃; VCC=6.0V | 9 | ||
| High-level output voltage | VOH | 1.9 | V | Tamb=-40℃～+125℃; IO=-20uA; VCC=2.0V | 9 | ||
| High-level output voltage | VOH | 4.4 | V | Tamb=-40℃～+125℃; IO=-20uA; VCC=4.5V | 9 | ||
| High-level output voltage | VOH | 5.9 | V | Tamb=-40℃～+125℃; IO=-20uA; VCC=6.0V | 9 | ||
| High-level output voltage | VOH | 3.7 | V | Tamb=-40℃～+125℃; IO=-6.0mA; VCC=4.5V | 9 | ||
| High-level output voltage | VOH | 5.2 | V | Tamb=-40℃～+125℃; IO=-7.8mA; VCC=6.0V | 9 | ||
| Low-level output voltage | VOL | 0.1 | V | Tamb=-40℃～+125℃; IO=20uA; VCC=2.0V | 9 | ||
| Low-level output voltage | VOL | 0.4 | V | Tamb=-40℃～+125℃; IO=6.0mA; VCC=4.5V | 9 | ||
| Input leakage current | II | -1 | 1 | uA | Tamb=-40℃～+125℃; VI=VCC or GND; VCC=6.0V | 9 | |
| Off-state output current | IOZ | -10 | 10 | uA | Tamb=-40℃～+125℃; VI=VIH or VIL; VCC=6.0V; VO=VCC or GND | 9 | |
| Supply current | ICC | 160 | uA | Tamb=-40℃～+125℃; VI=VCC or GND; IO=0A; VCC=6.0V | 9 | ||
| Propagation delay nAn to nYn | tpd | 165 | ns | Tamb=-40℃～+125℃; VCC=2.0V; see Fig.5 | 12 | ||
| Propagation delay nAn to nYn | tpd | 33 | ns | Tamb=-40℃～+125℃; VCC=4.5V; see Fig.5 | 12 | ||
| Propagation delay nAn to nYn | tpd | 28 | ns | Tamb=-40℃～+125℃; VCC=6.0V; see Fig.5 | 12 | ||
| Enable time nOE to nYn | ten | 225 | ns | Tamb=-40℃～+125℃; VCC=2.0V; see Fig.6 | 12 | ||
| Enable time nOE to nYn | ten | 45 | ns | Tamb=-40℃～+125℃; VCC=4.5V; see Fig.6 | 12 | ||
| Enable time nOE to nYn | ten | 38 | ns | Tamb=-40℃～+125℃; VCC=6.0V; see Fig.6 | 12 | ||
| Disable time nOE to nYn | tdis | 225 | ns | Tamb=-40℃～+125℃; VCC=2.0V; see Fig.6 | 12 | ||
| Disable time nOE to nYn | tdis | 45 | ns | Tamb=-40℃～+125℃; VCC=4.5V; see Fig.6 | 12 | ||
| Disable time nOE to nYn | tdis | 38 | ns | Tamb=-40℃～+125℃; VCC=6.0V; see Fig.6 | 12 | ||
| Transition time | tt | 90 | ns | Tamb=-40℃～+125℃; VCC=2.0V; see Fig.5 | 12 | ||
| Transition time | tt | 18 | ns | Tamb=-40℃～+125℃; VCC=4.5V; see Fig.5 | 12 | ||
| Transition time | tt | 15 | ns | Tamb=-40℃～+125℃; VCC=6.0V; see Fig.5 | 12 | ||
| Propagation delay nAn to nYn | tpd | 30 | 110 | ns | Tamb=25℃; VCC=2.0V; see Fig.5 | 10 | |
| Propagation delay nAn to nYn | tpd | 11 | 22 | ns | Tamb=25℃; VCC=4.5V; see Fig.5 | 10 | |
| Propagation delay nAn to nYn | tpd | 9 | 19 | ns | Tamb=25℃; VCC=6.0V; see Fig.5 | 10 | |
| Enable time nOE to nYn | ten | 36 | 150 | ns | Tamb=25℃; VCC=2.0V; see Fig.6 | 10 | |
| Enable time nOE to nYn | ten | 13 | 30 | ns | Tamb=25℃; VCC=4.5V; see Fig.6 | 10 | |
| Enable time nOE to nYn | ten | 10 | 26 | ns | Tamb=25℃; VCC=6.0V; see Fig.6 | 10 | |
| Disable time nOE to nYn | tdis | 39 | 150 | ns | Tamb=25℃; VCC=2.0V; see Fig.6 | 10 | |
| Disable time nOE to nYn | tdis | 14 | 30 | ns | Tamb=25℃; VCC=4.5V; see Fig.6 | 10 | |
| Disable time nOE to nYn | tdis | 11 | 26 | ns | Tamb=25℃; VCC=6.0V; see Fig.6 | 10 | |
| Transition time | tt | 14 | 60 | ns | Tamb=25℃; VCC=2.0V; see Fig.5 | 10 | |
| Transition time | tt | 5 | 12 | ns | Tamb=25℃; VCC=4.5V; see Fig.5 | 10 | |
| Transition time | tt | 4 | 10 | ns | Tamb=25℃; VCC=6.0V; see Fig.5 | 10 |
CAD (KiCad official)
- Symbol:
SN74HC244D - 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:
sn74hc244d-etched.step/sn74hc244d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc244d.step/sn74hc244d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic datasheet (19 pp, sha256
56daa4e3385f582a, retrieved 2026-10-18, 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).