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74HCT253DB 数据表(PDF) 1 Page - NXP Semiconductors

部件名 74HCT253DB
功能描述  Dual 4-input multiplexer; 3-state
Download  17 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

74HCT253DB 数据表(HTML) 1 Page - NXP Semiconductors

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1.
General description
The 74HC253; 74HCT253 are high-speed Si-gate CMOS devices and are pin compatible
with Low-power Schottky TTL (LSTTL).
The 74HC253; 74HCT253 provides a dual 4-input multiplexer with 3-state outputs which
selects 2 bits of data from up to four sources selected by common data select inputs (S0,
S1). The two 4-input multiplexer circuits have individual active LOW output enable inputs
(1OE, 2OE).
The 74HC253 and 74HCT253 are the logic implementation of a 2-pole, 4-position switch,
where the position of the switch is determined by the logic levels applied to S0 and S1.
The outputs are forced to a high-impedance OFF-state when nOE is HIGH.
The logic equations for the outputs are:
2.
Features and benefits
Non-inverting data path
3-state outputs interface directly with system bus
Complies with JEDEC standard no. 7A
Common select inputs
Separate output enable inputs
Input levels:
For 74HC253: CMOS level
For 74HCT253: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from
−40 °Cto+85 °C and from −40 °Cto+125 °C
74HC253; 74HCT253
Dual 4-input multiplexer; 3-state
Rev. 03 — 22 April 2010
Product data sheet
1Y
1OE
1I0
S1
S0
1I1
S1
S0
1I2
+
S1
S0
1I3
S1
S0
++
()
=
2Y
2OE
2I0
S1
S0
2I1
S1
S0
2I2
+
S1
S0
2I3
S1
S0
++
()
=


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