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MFG:STM  Package Cooled:SMD  D/C:04+  

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Part Number: 74AC257

 

MFG: STM

Package Cooled: SMD

D/C: 04+

Description: The AC/ACT257 is a quad 2-input multiplexer with 3- STATE outputs. Four bits of data from two sources ...


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74AC257 General Description


The AC/ACT257 is a quad 2-input multiplexer 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 (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems.

74AC257 Maximum Ratings

Supply Voltage (VCC)...................... −0.5V to +7.0V
DC Input Diode Current (IIK)
VI = −0.5V................................................... −20 mA
VI = VCC +0.5V............................................ +20 mA
DC Input Voltage (VI) ..............−0.5V to VCC + 0.5V
DC Output Diode Current (IOK)
VO = −0.5V ..................................................−20 mA
VO = VCC +0.5V........................................... +20 mA
DC Output Voltage (VO)........... −0.5V to VCC + 0.5V
DC Output Source ort
Sink Curren (IO).......................................... ±50 mA
DC VCC or Ground Current
Per Output Pin (ICC or IGND) ......................±50 mA
Storage Temperature (TSTG) .....−65°C to +150°C
Junction Temperature (TJ)
PDIP .............................................................140°C

74AC257 Features

· ICC and IOZ reduced by 50%
· Multiplexer expansion by tying outputs together
· Noninverting 3-STATE outputs
· Outputs source/sink 24 mA
· ACT257 has TTL-compatible inputs

74AC257 Connection Diagram

74AC257 Connection Diagram

74AC257 datasheet

74AC257
PDF/DataSheet Download

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