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參數(shù)資料
| 型號： | 74ALS253DB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4-input multiplexer 3-State |
| 中文描述： | ALS SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 2/9頁 |
| 文件大?。?/td> | 115K |
| 代理商： | 74ALS253DB |
Philips Semiconductors
Product specification
74ALS253
Dual 4-input multiplexer (3-State)
2
1991 Feb 08
853–1378 01670
FEATURES
3-State outputs for bus interface and multiplex operation
Common select inputs
Separate output enable inputs
DESCRIPTION
The 74ALS253 has two identical 4-input multiplexers with 3-State
outputs which select 2 bits from four sources by using common
select input (S0, S1). When the individual output enable (OEa,
OEb) inputs of the 4-input multiplexers are High, the outputs are
forced to a High impedance (Z) state.
The 74ALS253 is the logic implementation of 2-pole, 4-position
switch being determined by the logic levels supplied to the common
select inputs.
To avoid exceeding the maximum current ratings when the outputs
of the 3-State devices are tied together, all but one device must be
in the High impedance state. Therefore, only one output enable
must be achieved at a time.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS253
7.0ns
8mA
PIN CONFIGURATION
16
15
14
13
12
11
10
7
6
5
4
3
2
1
Ya
V
CC
I2b
I1b
I0b
I3b
OEb
S0
OEa
S1
I0a
I3a
I2a
I1a
9
8
GND
Yb
SF00798
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
DRAWING
NUMBER
16-pin plastic DIP
74ALS253N
SOT38-4
16-pin plastic SO
74ALS253D
SOT109-1
16-pin plastic SSOP
Type II
74ALS253DB
SOT338-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
I0a – I3a
Port A data inputs
1.0/1.0
20
μ
A/0.1mA
20
μ
A/0.1mA
20
μ
A/0.1mA
20
μ
A/0.1mA
20
μ
A/0.1mA
I0b – I3b
Port B data inputs
1.0/1.0
S0, S1
Common select inputs
1.0/1.0
OEa
Port A Output Enable input (active-Low)
1.0/1.0
OEb
Port B Output Enable input (active-Low)
1.0/1.0
Ya – Yb
One (1.0) ALS unit load is defined as: 20
μ
A in the High state and 0.1mA in the Low state.
3-State outputs
130/240
2.6mA/24mA
NOTE:
LOGIC SYMBOL
3
4
5
V
= Pin 16
GND = Pin 8
SF00799
9
7
14
2
1
S0
S1
OEa
15
6
13
12
11
10
OEb
Ya
Yb
I0a
I1a
I2a
I3a
I0b
I1b
I2b
I3b
IEC/IEEE SYMBOL
SC00073
MUX
1
6
15
10
11
7
9
0
5
2
EN
4
3
13
12
1
3
0
G0
3
2
14
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74ALS258N | 2-Input Digital Multiplexer |
| 74ALS258 | Data selector/multiplexer |
| 74ALS257DB | Data selector/multiplexer |
| 74ALS257 | Data selector/multiplexer |
| 74ALS257D | Data selector/multiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74ALS253N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual 4-input multiplexer 3-State |
| 74ALS2541 | 制造商:ARC-TRONICS 功能描述: |
| 74ALS257 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Data selector/multiplexer |
| 74ALS257D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Data selector/multiplexer |
| 74ALS257DB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Data selector/multiplexer |
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