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MM74HC126MTCX

Public Made by Adom

by adom

onsemi Buffers / Drivers, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MM74HC126MTCX

onsemi · Buffers / Drivers · TSSOP-14

MM74HC126MTCX from onsemi, in a TSSOP-14. 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 C1 input Active-high output enable for buffer 1; output Y1 is high-impedance when C1 is low.
2 A1 input Data input of buffer 1, with input current of 1µA maximum.
3 Y1 tri_state 3-STATE non-inverting output of buffer 1, high-impedance when C1 is low.
4 C2 input Active-high output enable for buffer 2; output Y2 is high-impedance when C2 is low.
5 A2 input Data input of buffer 2, with input current of 1µA maximum.
6 Y2 tri_state 3-STATE non-inverting output of buffer 2, high-impedance when C2 is low.
7 GND power_in Ground reference for the device.
8 Y3 tri_state 3-STATE non-inverting output of buffer 3, high-impedance when C3 is low.
9 A3 input Data input of buffer 3, with input current of 1µA maximum.
10 C3 input Active-high output enable for buffer 3; output Y3 is high-impedance when C3 is low.
11 Y4 tri_state 3-STATE non-inverting output of buffer 4, high-impedance when C4 is low.
12 A4 input Data input of buffer 4, with input current of 1µA maximum.
13 C4 input Active-high output enable for buffer 4; output Y4 is high-impedance when C4 is low.
14 VCC power_in Positive supply voltage, 2V to 6V recommended operating range (absolute maximum 7.0V).

Key specifications

Parameter Value
Manufacturer onsemi
Package TSSOP-14
Category Logic ICs
Pins 14

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
Clamp Diode Current IIK, IOK -20 20 mA ±20mA 4
DC Output Current, per pin IOUT 35 mA per pin 4
DC VCC or GND Current, per pin ICC -70 70 mA ±70mA per pin 4
Storage Temperature Range TSTG -65 150 °C 4
Power Dissipation PD 600 mW Note 2; S.O. package only 500mW 4
Lead Temperature TL 260 °C Soldering 10 seconds 4
Supply Voltage VCC 2 6 V 4
DC Input or Output Voltage VIN, VOUT 0 6 V 0 to VCC 4
Operating Temperature Range TA -40 85 °C 4
Input Rise or Fall Time tr, tf 1000 ns VCC = 2.0V 4
Input Rise or Fall Time tr, tf 500 ns VCC = 4.5V 4
Input Rise or Fall Time tr, tf 400 ns VCC = 6.0V 4
Minimum HIGH Level Input Voltage VIH 1.5 V VCC = 2.0V, TA = -40 to 85°C 5
Minimum HIGH Level Input Voltage VIH 3.15 V VCC = 4.5V, TA = -40 to 85°C 5
Minimum HIGH Level Input Voltage VIH 4.2 V VCC = 6.0V, TA = -40 to 85°C 5
Maximum LOW Level Input Voltage VIL 0.5 V VCC = 2.0V, TA = -40 to 85°C 5
Maximum LOW Level Input Voltage VIL 1.35 V VCC = 4.5V, TA = -40 to 85°C 5
Maximum LOW Level Input Voltage VIL 1.8 V VCC = 6.0V, TA = -40 to 85°C 5
Minimum HIGH Level Output Voltage VOH 1.9 2 V VIN = VIH or VIL, /IOUT/ ≤ 20µA, VCC = 2.0V, TA = -40 to 85°C 5
Minimum HIGH Level Output Voltage VOH 4.4 4.5 V VIN = VIH or VIL, /IOUT/ ≤ 20µA, VCC = 4.5V, TA = -40 to 85°C 5
Minimum HIGH Level Output Voltage VOH 5.9 6 V VIN = VIH or VIL, /IOUT/ ≤ 20µA, VCC = 6.0V, TA = -40 to 85°C 5
Minimum HIGH Level Output Voltage VOH 3.84 4.2 V VIN = VIH or VIL, /IOUT/ ≤ 6.0mA, VCC = 4.5V, TA = -40 to 85°C 5
Minimum HIGH Level Output Voltage VOH 5.34 5.7 V VIN = VIH or VIL, /IOUT/ ≤ 7.8mA, VCC = 6.0V, TA = -40 to 85°C 5
Maximum LOW Level Output Voltage VOL 0 0.1 V VIN = VIH or VIL, /IOUT/ ≤ 20µA, VCC = 2.0V to 6.0V, TA = -40 to 85°C 5
Maximum LOW Level Output Voltage VOL 0.2 0.33 V VIN = VIH or VIL, /IOUT/ ≤ 6.0mA, VCC = 4.5V, TA = -40 to 85°C 5
Maximum 3-STATE Output Leakage Current IOZ -5 5 µA VIN = VIH or VIL, VOUT = VCC or GND, Cn = Disabled, VCC = 6.0V, TA = -40 to 85°C 5
Maximum Input Current IIN -1 1 µA VIN = VCC or GND, VCC = 6.0V, TA = -40 to 85°C 5
Maximum Quiescent Supply Current ICC 8 80 µA VIN = VCC or GND, IOUT = 0µA, VCC = 6.0V, TA = -40 to 85°C 5
Maximum Propagation Delay Time tPHL, tPLH 13 18 ns VCC = 5V, TA = 25°C, CL = 45pF 6
Maximum Output Enable Time to HIGH Level tPZH 13 25 ns RL = 1kΩ, VCC = 5V, TA = 25°C 6
Maximum Output Disable Time from HIGH Level tPHZ 17 25 ns RL = 1kΩ, CL = 5pF, VCC = 5V, TA = 25°C 6
Maximum Output Enable Time to LOW Level tPZL 18 25 ns RL = 1kΩ, VCC = 5V, TA = 25°C 6
Maximum Output Disable Time from LOW Level tPLZ 13 25 ns RL = 1kΩ, CL = 5pF, VCC = 5V, TA = 25°C 6
Maximum Propagation Delay Time tPHL, tPLH 40 125 ns VCC = 2.0V, TA = -40 to 85°C 6
Maximum Propagation Delay Time tPHL, tPLH 14 25 ns VCC = 4.5V, TA = -40 to 85°C 6
Maximum Propagation Delay Time tPHL, tPLH 12 21 ns VCC = 6.0V, TA = -40 to 85°C 6
Maximum Propagation Delay Time tPLH, tPHL 35 163 ns CL = 150pF, VCC = 2.0V, TA = -40 to 85°C 6
Maximum Propagation Delay Time tPLH, tPHL 14 33 ns CL = 150pF, VCC = 4.5V, TA = -40 to 85°C 6
Maximum Propagation Delay Time tPLH, tPHL 12 28 ns CL = 150pF, VCC = 6.0V, TA = -40 to 85°C 6
Maximum Output Enable Time tPZH, tPZL 25 156 ns RL = 1kΩ, VCC = 2.0V, TA = -40 to 85°C 6
Maximum Output Enable Time tPZH, tPZL 14 31 ns RL = 1kΩ, VCC = 4.5V, TA = -40 to 85°C 6
Maximum Output Enable Time tPZH, tPZL 12 26 ns RL = 1kΩ, VCC = 6.0V, TA = -40 to 85°C 6
Maximum Output Disable Time tPHZ, tPLZ 25 156 ns RL = 1kΩ, VCC = 2.0V, TA = -40 to 85°C 6
Maximum Output Disable Time tPHZ, tPLZ 14 31 ns RL = 1kΩ, VCC = 4.5V, TA = -40 to 85°C 6
Maximum Output Disable Time tPHZ, tPLZ 12 26 ns RL = 1kΩ, VCC = 6.0V, TA = -40 to 85°C 6
Maximum Output Enable Time tPZL, tPZH 35 175 ns CL = 150pF, RL = 1kΩ, VCC = 2.0V, TA = -40 to 85°C 6
Maximum Output Enable Time tPZL, tPZH 15 35 ns CL = 150pF, RL = 1kΩ, VCC = 4.5V, TA = -40 to 85°C 6
Maximum Output Enable Time tPZL, tPZH 13 30 ns CL = 150pF, RL = 1kΩ, VCC = 6.0V, TA = -40 to 85°C 6
Maximum Output Rise and Fall Time tTLH, tTHL 30 75 ns CL = 50pF, VCC = 2.0V, TA = -40 to 85°C 6
Maximum Output Rise and Fall Time tTLH, tTHL 7 15 ns CL = 50pF, VCC = 4.5V, TA = -40 to 85°C 6
Maximum Output Rise and Fall Time tTLH, tTHL 6 13 ns CL = 50pF, VCC = 6.0V, TA = -40 to 85°C 6
Input Capacitance CIN 5 10 pF TA = -40 to 85°C 6
Output Capacitance COUT 15 20 pF Outputs, TA = -40 to 85°C 6
Power Dissipation Capacitance (per gate), Enabled CPD 45 pF Enabled 6
Power Dissipation Capacitance (per gate), Disabled CPD 6 pF Disabled 6

CAD (KiCad official)

  • Symbol: MM74HC126MTCX
  • Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
  • 3D model: TSSOP-14 (KiCad packages3D, STEP)
  • 3D model files: mm74hc126mtcx-etched.step / mm74hc126mtcx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm74hc126mtcx.step / mm74hc126mtcx.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (9 pp, sha256 b9c42e7189a28831, retrieved 2026-10-27, tier: manufacturer)
  • 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