Quadruple Bus Buffer Gates With 3-State Outputs - SN74HC125


Quadruple Bus Buffer Gates With 3-State Outputs



The SNx4HC125 device is a quadruple set of bus buffer gates and features independent line drivers with 3-state outputs. The SNx4HC125 is designed for 2-V to 6-V VCC operation. Each output is disabled when the associated output-enable (OE) input is high.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.


  • Wide Operating Voltage Range of 2 V to 6 V
  • High-Current 3-State Outputs Interface Directly
    With System Bus or Can Drive Up to 15 LSTTL
  • Low Power Consumption, 80-µA Maximum ICC
  • Typical tpd = 11 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Maximum

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Other qualified versions of SN74HC125

Version Part Number Definition
Military SN54HC125 QML certified for Military and Defense Applications
Automotive SN74HC125-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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Parametrics Compare all products in Non-Inverting Buffer/Driver

Technology Family
VCC (Min) (V)
VCC (Max) (V)
Bits (#)
Voltage (Nom) (V)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Output Drive (IOL/IOH) (Max) (mA)
Input Type
Output Type
Schmitt Trigger
Operating Temperature Range (C)
Approx. Price (US$)
SN74HC125 SN54HC125 SN74HC125-Q1
HC     HC     HC    
2     2     2    
6     6     6    
4     4     4    
6       6    
28       28    
0.16       0.016    
26       26    
-6/6       -6/6    
CMOS     CMOS     CMOS    
CMOS     CMOS     CMOS    
No     No     No    
Catalog     Military     Automotive    
-40 to 85     -55 to 125     -40 to 85    
0.09 | 1ku       0.17 | 1ku