The SN54125, SN54126, SN74125, SN74126, and SN54LS126A are obsolete and are no longer supplied.
SN54125, SN54126, SN54L...
The SN54125, SN54126, SN74125, SN74126, and SN54LS126A are obsolete and are no longer supplied.
SN54125, SN54126, SN54LS125A, SN54LS126A,
SN74125, SN74126, SN74LS125A, SN74LS126A QUADRUPLE BUS BUFFERS WITH 3-STATE OUTPUTS
SDLS044A – DECEMBER 1983 – REVISED MARCH 2002
D Quad Bus Buffers D 3-State Outputs D Separate Control for Each Channel
description
These bus buffers feature three-state outputs that, when enabled, have the low impedance characteristics of a TTL output with additional drive capability at high logic levels to permit driving heavily loaded bus lines without external pullup resistors. When disabled, both output
transistors are turned off, presenting a high-impedance state to the bus so the output will act neither as a significant load nor as a driver. The ’125 and ’LS125A devices’ outputs are disabled when G is high. The ’126 and ’LS126A devices’ outputs are disabled when G is low.
SN54125, SN54126, SN54LS125A, SN54LS126A . . . J OR W PACKAGE SN74125, SN74126 . . . N PACKAGE SN74LS125A, SN74LS126A . . . D, N, OR NS PACKAGE
(TOP VIEW)
1G, 1G* 1 1A 2 1Y 3
2G, 2G* 4 2A 5 2Y 6
GND 7
14 VCC 13 4G, 4G* 12 4A 11 4Y 10 3G, 3G* 9 3A 8 3Y
*G on ’125 and ’LS125A devices; G on 126 and ’LS126A devices
SN54LS125A, SN54LS126A . . . FK PACKAGE (TOP VIEW)
1A 1G, 1G* NC VCC 4G, 4G*
1Y NC 2G, 2G* NC 2A
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
4A NC 4Y NC 3G, 3G*
2Y GND
NC 3Y 3A
*G on ’125 and ’LS125A devices; G on 126 and ’LS126A devices NC – No in...