Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1 Publication Order Number:
SN74LS257B/D
The LSTTL/MSI SN74LS257B and the SN74LS258B are Quad
2-Input Multiplexers with 3-state outputs. Four bits of data from two
sources can be selected using a Common Data Select input. The four
outputs present the selected data in true (non-inverted) form. The
outputs may be switched to a high impedance state with a HIGH on the
common Output Enable (E
O
) Input, allowing the outputs to interface
directly with bus oriented systems. It is fabricated with the Schottky
barrier diode process for high speed and is completely compatible with
all ON Semiconductor TTL families.
• Schottky Process For High Speed
• Multiplexer Expansion By Tying Outputs Together
• Non-Inverting 3-State Outputs
• Input Clamp Diodes Limit High Speed Termination Effects
• Special Circuitry Ensures Glitch Free Multiplexing
• ESD > 3500 Volts
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 4.75 5.0 5.25 V
T
A
Operating Ambient
Temperature Range
0 25 70 °C
I
OH
Output Current – High –2.6 mA
I
OL
Output Current – Low 24 mA
LOW
POWER
SCHOTTKY
Device Package Shipping
ORDERING INFORMATION
SN74LS257BN 16 Pin DIP 2000 Units/Box
SN74LS257BD 16 Pin
SOIC
D SUFFIX
CASE 751B
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
SN74LS258BN 16 Pin DIP 2000 Units/Box
SN74LS258BD 16 Pin
2500/Tape & Reel
