HD74LS257P
HD74LS257P is Quadruple 2-line-to-1-line Data Selectors/Multiplexers manufactured by Renesas.
- Part of the HD74LS257 comparator family.
- Part of the HD74LS257 comparator family.
features three-state outputs that can interface directly with and drive data lines of bus-organized systems. With all but one of the mon outputs disabled (at a high-impedance state) the low impedance of the single enabled output will drive the bus line to a high or low logic level.
To minimize the possibility that two outputs will attempt to take a mon bus to opposite logic levels, the outputenable circuitry is designed such that the output disable times are shorter than the output enable times.
Features
- Ordering Information
Part Name
Package Type
Package Code (Previous Code)
Package Abbreviation
DILP-16 pin
PRDP0016AE-B (DP-16FV)
PRSP0016DH-B
HD74LS257FPEL SOP-16 pin (JEITA)
(FP-16DAV)
Note: Please consult the sales office for the above package availability.
Taping Abbreviation (Quantity)
- EL (2,000 pcs/reel)
Pin Arrangement
Select 1 1A 2 1B 3 1Y 4 2A 5 2B 6 2Y 7
GND 8
1A
1B
4A
1Y
4B
2A
4Y
2B
3A
2Y
3B
3Y
16 VCC 15 Output
Control 14 4A 13 4B 12 4Y 11 3A 10 3B 9 3Y
(Top view)
Rev.3.00, Jul.15.2005, page 1 of...
