SN54125, SN54126, SN54LS125A, SN54LS126A,

SN74125, SN74126, SN74LS125A, SN74LS126A

QUADRUPLE BUS BUFFERS WITH 3-STATE OUTPUTS

SDLS044A – DECEMBER 1983 – REVISED MARCH 2002

4

POST OFFICE BOX 655303

schematics (each gate)

10 k

W

18 k

W

12 k

W

8 k

W

18 k

W

18 k

W

8 k

W

6 k

W

6 k

W

4 k

W

4 k

W

5 k

W

4 k

W

750

W

750

W

5 k

W

4 k

W

20 k

W

20 k

W

1.5 k

W

1.5 k

W

50

W

50

W

INPUT G

INPUT G

INPUT A

INPUT A

OUTPUT

GND

OUTPUT

GND

VCC

VCC

’LS125A CIRCUITS

’LS126A CIRCUITS

Resistor values shown are nominal.

(’LS125A and ’LS126A)

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

86

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

N package

80

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NS package

76

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. Voltage values are with respect to network ground terminal.

2. The package termal impedance is calculated in accordance with JESD 51-7.

The SN54125, SN54126, SN74125,

SN74126, and SN54LS126A are

obsolete and are no longer supplied.