component

MM74HC244WMX

Public Made by Adom

by adom

onsemi Buffers / Drivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentlogic icsmm74hc244wmxfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
mm74hc244wmx / README.md
History Download
Ray Publish 0.1.0 592828c 8d ago

MM74HC244WMX

onsemi · Buffers / Drivers · SOIC-20-300mil

MM74HC244WMX 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 1G input Active-low 3-STATE enable for the first group of four buffers (1A1-1A4 to 1Y1-1Y4); outputs go high-impedance when high.
2 1A1 input Buffer input 1 of group 1, non-inverting to 1Y1.
3 2Y4 tri_state 3-STATE buffer output 4 of group 2, controlled by 2G with 6 mA output drive.
4 1A2 input Buffer input 2 of group 1, non-inverting to 1Y2.
5 2Y3 tri_state 3-STATE buffer output 3 of group 2, controlled by 2G with 6 mA output drive.
6 1A3 input Buffer input 3 of group 1, non-inverting to 1Y3.
7 2Y2 tri_state 3-STATE buffer output 2 of group 2, controlled by 2G with 6 mA output drive.
8 1A4 input Buffer input 4 of group 1, non-inverting to 1Y4.
9 2Y1 tri_state 3-STATE buffer output 1 of group 2, controlled by 2G with 6 mA output drive.
10 GND power_in Ground reference for the device.
11 2A1 input Buffer input 1 of group 2, non-inverting to 2Y1.
12 1Y4 tri_state 3-STATE buffer output 4 of group 1, controlled by 1G with 6 mA output drive.
13 2A2 input Buffer input 2 of group 2, non-inverting to 2Y2.
14 1Y3 tri_state 3-STATE buffer output 3 of group 1, controlled by 1G with 6 mA output drive.
15 2A3 input Buffer input 3 of group 2, non-inverting to 2Y3.
16 1Y2 tri_state 3-STATE buffer output 2 of group 1, controlled by 1G with 6 mA output drive.
17 2A4 input Buffer input 4 of group 2, non-inverting to 2Y4.
18 1Y1 tri_state 3-STATE buffer output 1 of group 1, controlled by 1G with 6 mA output drive.
19 2G input Active-low 3-STATE enable for the second group of four buffers (2A1-2A4 to 2Y1-2Y4); outputs go high-impedance when high.
20 VCC power_in Positive supply voltage, recommended 2 to 6 V (absolute maximum -0.5 to +7.0 V).

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
Supply Voltage VCC -0.5 7 V 3
DC Input Voltage VIN -1.5 V -1.5 to VCC +1.5V 3
DC Output Voltage VOUT -0.5 V -0.5 to VCC +0.5V 3
Clamp Diode Current IIK, IOK -20 20 mA 3
DC Output Current, per pin IOUT -35 35 mA 3
DC VCC or GND Current, per pin ICC -70 70 mA 3
Storage Temperature Range TSTG -65 150 °C 3
Power Dissipation PD 500 mW S.O. Package only 3
Lead Temperature TL 260 °C Soldering 10 seconds 3
Supply Voltage VCC 2 6 V 3
DC Input or Output Voltage VIN, VOUT 0 V 0 to VCC 3
Operating Temperature Range TA -40 85 °C 3
Input Rise or Fall Times tr, tf 1000 ns VCC = 2.0V 3
Input Rise or Fall Times tr, tf 500 ns VCC = 4.5V 3
Input Rise or Fall Times tr, tf 400 ns VCC = 6.0V 3
Minimum HIGH Level Input Voltage VIH 1.5 V VCC = 2.0V, TA = -40 to 85°C 3
Minimum HIGH Level Input Voltage VIH 3.15 V VCC = 4.5V, TA = -40 to 85°C 3
Minimum HIGH Level Input Voltage VIH 4.2 V VCC = 6.0V, TA = -40 to 85°C 3
Maximum LOW Level Input Voltage VIL 0.5 V VCC = 2.0V, TA = -40 to 85°C 3
Maximum LOW Level Input Voltage VIL 1.35 V VCC = 4.5V, TA = -40 to 85°C 3
Maximum LOW Level Input Voltage VIL 1.8 V VCC = 6.0V, TA = -40 to 85°C 3
Minimum HIGH Level Output Voltage VOH 1.9 2 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 2.0V, TA = -40 to 85°C 3
Minimum HIGH Level Output Voltage VOH 4.4 4.5 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 4.5V, TA = -40 to 85°C 3
Minimum HIGH Level Output Voltage VOH 5.9 6 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 6.0V, TA = -40 to 85°C 3
Minimum HIGH Level Output Voltage VOH 3.84 4.2 V VIN = VIH or VIL, /IOUT/ ≤ 6.0 mA, VCC = 4.5V, TA = -40 to 85°C 3
Minimum HIGH Level Output Voltage VOH 5.34 5.7 V VIN = VIH or VIL, /IOUT/ ≤ 7.8 mA, VCC = 6.0V, TA = -40 to 85°C 3
Maximum LOW Level Output Voltage VOL 0 0.1 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 2.0V, TA = -40 to 85°C 3
Maximum LOW Level Output Voltage VOL 0.2 0.33 V VIN = VIH or VIL, /IOUT/ ≤ 6.0 mA, VCC = 4.5V, TA = -40 to 85°C 3
Maximum Input Current IIN -1 0.1 1 µA VIN = VCC or GND, VCC = 6.0V, TA = -40 to 85°C 3
Maximum 3-STATE Output Leakage Current IOZ -5 0.5 5 µA VIN = VIH or VIL, VOUT = VCC or GND, G = VIH, VCC = 6.0V, TA = -40 to 85°C 3
Maximum Quiescent Supply Current ICC 8 80 µA VIN = VCC or GND, IOUT = 0 µA, VCC = 6.0V, TA = -40 to 85°C 3
Maximum Propagation Delay tPHL, tPLH 14 20 ns VCC = 5V, TA = 25°C, CL = 45 pF 4
Maximum Enable Delay to Active Output tPZH, tPZL 17 28 ns VCC = 5V, TA = 25°C, RL = 1 kΩ, CL = 45 pF 4
Maximum Disable Delay from Active Output tPHZ, tPLZ 15 25 ns VCC = 5V, TA = 25°C, RL = 1 kΩ, CL = 5 pF 4
Maximum Propagation Delay tPHL, tPLH 58 145 ns CL = 50 pF, VCC = 2.0V, TA = -40 to 85°C 4
Maximum Propagation Delay tPHL, tPLH 83 208 ns CL = 150 pF, VCC = 2.0V, TA = -40 to 85°C 4
Maximum Propagation Delay tPHL, tPLH 14 29 ns CL = 50 pF, VCC = 4.5V, TA = -40 to 85°C 4
Maximum Propagation Delay tPHL, tPLH 17 42 ns CL = 150 pF, VCC = 4.5V, TA = -40 to 85°C 4
Maximum Propagation Delay tPHL, tPLH 10 25 ns CL = 50 pF, VCC = 6.0V, TA = -40 to 85°C 4
Maximum Propagation Delay tPHL, tPLH 14 35 ns CL = 150 pF, VCC = 6.0V, TA = -40 to 85°C 4
Maximum Output Enable Time tPZH, tPZL 75 189 ns RL = 1 kΩ, CL = 50 pF, VCC = 2.0V, TA = -40 to 85°C 4
Maximum Output Enable Time tPZH, tPZL 100 252 ns RL = 1 kΩ, CL = 150 pF, VCC = 2.0V, TA = -40 to 85°C 4
Maximum Output Enable Time tPZH, tPZL 15 38 ns RL = 1 kΩ, CL = 50 pF, VCC = 4.5V, TA = -40 to 85°C 4
Maximum Output Enable Time tPZH, tPZL 30 50 ns RL = 1 kΩ, CL = 150 pF, VCC = 4.5V, TA = -40 to 85°C 4
Maximum Output Enable Time tPZH, tPZL 13 32 ns RL = 1 kΩ, CL = 50 pF, VCC = 6.0V, TA = -40 to 85°C 4
Maximum Output Enable Time tPZH, tPZL 17 43 ns RL = 1 kΩ, CL = 150 pF, VCC = 6.0V, TA = -40 to 85°C 4
Maximum Output Disable Time tPHZ, tPLZ 75 189 ns RL = 1 kΩ, VCC = 2.0V, TA = -40 to 85°C 4
Maximum Output Disable Time tPHZ, tPLZ 15 38 ns CL = 50 pF, VCC = 4.5V, TA = -40 to 85°C 4
Maximum Output Disable Time tPHZ, tPLZ 13 32 ns VCC = 6.0V, TA = -40 to 85°C 4
Maximum Output Rise and Fall Time tTLH, tTHL 60 90 ns VCC = 2.0V, TA = -40 to 85°C 4
Maximum Output Rise and Fall Time tTLH, tTHL 12 18 ns VCC = 4.5V, TA = -40 to 85°C 4
Maximum Output Rise and Fall Time tTLH, tTHL 10 15 ns VCC = 6.0V, TA = -40 to 85°C 4
Maximum Input Capacitance CIN 5 10 pF TA = -40 to 85°C 4
Maximum Output Capacitance COUT 10 20 pF TA = -40 to 85°C 4
Power Dissipation Capacitance (per buffer) CPD 12 pF G = VIH 4
Power Dissipation Capacitance (per buffer) CPD 50 pF G = VIL 4

CAD (KiCad official)

  • Symbol: MM74HC244WMX
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: mm74hc244wmx-etched.step / mm74hc244wmx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm74hc244wmx.step / mm74hc244wmx.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (8 pp, sha256 de4b4c7bf6fc2071, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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