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 .
ACKAGE SN74LS125A, SN74LS126A . . . D, N, OR NS PACKAGE
(TOP VIEW)
1G, 1G
* 1A 1Y
2G, 2G
* 2A 2Y
GND
1 2 3 4 5 6 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 internal connection
Please be aware that an important notice concerning availability, standard warranty, and us.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | SN5412 |
Texas Instruments |
POSITIVE-NAND GATE | |
2 | SN54121 |
Texas Instruments |
MONOSTABLE MULTIVIBRATORS | |
3 | SN54122 |
Texas Instruments |
RETRIGGERABLE MONOSTABLE MULTIVIBRATORS | |
4 | SN54123 |
Texas Instruments |
RETRIGGERABLE MONOSTABLE MULTIVIBRATORS | |
5 | SN54125 |
Texas Instruments |
QUADRUPLE BUS BUFFERS | |
6 | SN54128 |
Texas Instruments |
Line Drivers | |
7 | SN5410 |
Texas Instruments |
TRIPLE 3-INPUT POSITIVE-NAND GATES | |
8 | SN54107 |
Texas Instruments |
DUAL J-K FLIP-FLOPS | |
9 | SN54109 |
Texas Instruments |
Dual J-K Positive-Edge-Triggered Flip-Flops | |
10 | SN54130 |
Texas Instruments |
RETRIGGERABLE MONOSTABLE MULTIVIBRATORS | |
11 | SN54132 |
Texas Instruments |
Quadruple 2-Input Positive-NAND Schmitt Triggers | |
12 | SN54136 |
Texas Instruments |
Quadruple 2-Input Exclusive-OR Gates |