參數(shù)資料
型號(hào): IDT74FCT257TLB
廠商: Integrated Device Technology, Inc.
英文描述: FAST CMOS QUAD 2-INPUT MULTIPLEXER
中文描述: 快速CMOS四路2輸入多路復(fù)用器
文件頁(yè)數(shù): 1/7頁(yè)
文件大小: 73K
代理商: IDT74FCT257TLB
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
IDT54/74FCT257T/AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
1
J UNE 2001
MILIT ARY AND INDUS T RIAL T EMPERAT URE RANGES
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc.
DSC-5500/2
FEATURES:
Std., A, C, and D grades
Low input and output leakage
1μA (max.)
CMOS power levels
True TTL input and output compatibility:
– V
OH
= 3.3V (typ.)
– V
OL
= 0.3V (typ.)
High Drive outputs (-15mA I
OH
, 48mA I
OL
)
Meets or exceeds JEDEC standard 18 specifications
Mlitary product compliant to MIL-STD-883, Class B and DESC
listed (dual marked)
Power off disable outputs permit "live insertion"
Available in the following packages:
– Industrial: SOIC, QSOP
– Mlitary: CERDIP, LCC
FUNCTIONAL BLOCK DIAGRAM
IDT54/74FCT257T/AT/CT/DT
FAST CMOS
QUAD 2-INPUT
MULTIPLEXER
DESCRIPTION:
The FCT257T is a high-speed quad 2-input multiplexer built using an
advanced dual metal CMOS technology. Four bits of data fromtwo sources
can be selected using the common select input. The four buffered outputs
present the selected data in the true (non-inverting) form
The FCT257T has a common Output Enable (
OE
) input. When
OE
is
high, all outputs are switched to a high-impedance state allowing the outputs
to interface directly with bus-oriented systems.
Three other multiplexers
OE
Z
A
Z
B
Z
D
S
I
1B
I
1D
I
0B
I
0D
I
1A
I
0A
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