component
74ACT244SC
Public Made by Adomby adom
onsemi Buffers / Drivers, SOIC-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
markdown74ACT244SC
onsemi · Buffers / Drivers · SOIC-20-300mil
74ACT244SC from onsemi, in a SOIC-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 | OE1 | input | 3-STATE output enable input for outputs O0 to O3; outputs are enabled when OE1 is low and high-impedance when high. |
| 2 | I0 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 3 | O4 | tri_state | 3-STATE buffer output controlled by OE2; sources and sinks 24 mA per the datasheet features. |
| 4 | I1 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 5 | O5 | tri_state | 3-STATE buffer output controlled by OE2; sources and sinks 24 mA per the datasheet features. |
| 6 | I2 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 7 | O6 | tri_state | 3-STATE buffer output controlled by OE2; sources and sinks 24 mA per the datasheet features. |
| 8 | I3 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 9 | O7 | tri_state | 3-STATE buffer output controlled by OE2; sources and sinks 24 mA per the datasheet features. |
| 10 | GND | power_in | Ground reference pin for the device. |
| 11 | I7 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 12 | O3 | tri_state | 3-STATE buffer output controlled by OE1; sources and sinks 24 mA per the datasheet features. |
| 13 | I6 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 14 | O2 | tri_state | 3-STATE buffer output controlled by OE1; sources and sinks 24 mA per the datasheet features. |
| 15 | I5 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 16 | O1 | tri_state | 3-STATE buffer output controlled by OE1; sources and sinks 24 mA per the datasheet features. |
| 17 | I4 | input | Data input to the octal buffer; ACT244 inputs are TTL-compatible per the datasheet features. |
| 18 | O0 | tri_state | 3-STATE buffer output controlled by OE1; sources and sinks 24 mA per the datasheet features. |
| 19 | OE2 | input | 3-STATE output enable input for outputs O4 to O7; outputs are enabled when OE2 is low and high-impedance when high. |
| 20 | VCC | power_in | Positive supply pin; recommended supply is 4.5 to 5.5 V for ACT devices (2.0 to 6.0 V for AC devices). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-20-300mil |
| Category | Logic ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| High-level input voltage min | VIH | 2 | 1.5 | V | VCC=4.5 V, VOUT=0.1 V or VCC-0.1 V, TA=-40 to +85°C | 4 | |
| Low-level input voltage max | VIL | 1.5 | 0.8 | V | VCC=4.5 V, VOUT=0.1 V or VCC-0.1 V, TA=-40 to +85°C | 4 | |
| High-level output voltage | VOH | 4.4 | 4.49 | V | VCC=4.5 V, IOUT=-50 µA, TA=-40 to +85°C | 4 | |
| High-level output voltage | VOH | 5.4 | 5.49 | V | VCC=5.5 V, IOUT=-50 µA, TA=-40 to +85°C | 4 | |
| High-level output voltage | VOH | 3.76 | 3.86 | V | VCC=4.5 V, VIN=VIL or VIH, IOH=24 mA, TA=-40 to +85°C | 4 | |
| High-level output voltage | VOH | 4.76 | 4.86 | V | VCC=5.5 V, VIN=VIL or VIH, IOH=24 mA, TA=-40 to +85°C | 4 | |
| Low-level output voltage | VOL | 0.001 | 0.1 | V | VCC=4.5 V, IOUT=50 µA, TA=-40 to +85°C | 4 | |
| Low-level output voltage | VOL | 0.36 | 0.44 | V | VCC=4.5 V, VIN=VIL or VIH, IOL=24 mA, TA=-40 to +85°C | 4 | |
| Input leakage current | IIN | -1 | 1 | µA | VCC=5.5 V, VI=VCC, GND, TA=-40 to +85°C | 4 | |
| 3-STATE leakage current | IOZ | -2.5 | 2.5 | µA | VCC=5.5 V, VI=VIL, VIH; VO=VCC, GND, TA=-40 to +85°C | 4 | |
| Maximum ICC per input | ICCT | 0.6 | 1.5 | mA | VCC=5.5 V, VI=VCC-2.1 V, TA=-40 to +85°C | 4 | |
| Quiescent supply current | ICC | 4 | 40 | µA | VCC=5.5 V, VIN=VCC or GND, TA=-40 to +85°C | 4 | |
| Propagation delay, data to output (LH) | tPLH | 1.5 | 10 | ns | VCC=5.0 V, CL=50 pF, TA=-40 to +85°C | 5 | |
| Propagation delay, data to output (HL) | tPHL | 1.5 | 10 | ns | VCC=5.0 V, CL=50 pF, TA=-40 to +85°C | 5 | |
| Output enable time (Z to H) | tPZH | 1 | 9.5 | ns | VCC=5.0 V, CL=50 pF, TA=-40 to +85°C | 5 | |
| Output enable time (Z to L) | tPZL | 1.5 | 10.5 | ns | VCC=5.0 V, CL=50 pF, TA=-40 to +85°C | 5 | |
| Output disable time (H to Z) | tPHZ | 1.5 | 10.5 | ns | VCC=5.0 V, CL=50 pF, TA=-40 to +85°C | 5 | |
| Output disable time (L to Z) | tPLZ | 2 | 10.5 | ns | VCC=5.0 V, CL=50 pF, TA=-40 to +85°C | 5 | |
| Supply voltage (ACT) | VCC | 4.5 | 5.5 | V | ACT | 2 | |
| Input voltage | VI | 0 | V | 0 to VCC | 2 | ||
| Output voltage | VO | 0 | V | 0 to VCC | 2 | ||
| Operating temperature | TA | -40 | 85 | °C | 2 | ||
| Minimum input edge rate (ACT) | ΔV/Δt | 125 | mV/ns | VIN from 0.8 V to 2.0 V, VCC @ 4.5 V, 5.5 V | 2 | ||
| Supply voltage | VCC | -0.5 | 7 | V | 2 | ||
| DC input diode current | IIK | -20 | 20 | mA | VI = -0.5 V (-20); VI = VCC + 0.5 V (+20) | 2 | |
| DC input voltage | VI | -0.5 | V | -0.5 to VCC + 0.5 V | 2 | ||
| DC output diode current | IOK | -20 | 20 | mA | VO = -0.5 V (-20); VI = VCC + 0.5 V (+20) | 2 | |
| DC output voltage | VO | -0.5 | V | -0.5 to VCC + 0.5 V | 2 | ||
| DC output source or sink current | IO | -50 | 50 | mA | 2 | ||
| DC VCC or ground current per output pin | ICC or IGND | -50 | 50 | mA | 2 | ||
| Storage temperature | TSTG | -65 | 150 | °C | 2 | ||
| Junction temperature | TJ | 140 | °C | 2 | |||
| Input capacitance | CIN | 4.5 | pF | VCC = OPEN | 5 | ||
| Power dissipation capacitance | CPD | 45 | pF | VCC = 5.0 V | 5 |
CAD (KiCad official)
- Symbol:
74ACT244SC - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
74act244sc-etched.step/74act244sc-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74act244sc.step/74act244sc.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (11 pp, sha256
99ad504f29a09b78, retrieved 2026-10-31, 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).