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74ALS241A-1N Fiches technique(PDF) 2 Page - NXP Semiconductors

No de pièce 74ALS241A-1N
Description  Octal buffer 3-state
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74ALS241A-1N Fiches technique(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74ALS241A/74ALS241A-1
Octal buffer (3-State)
2
1991 Feb 08
853–1276 01670
FEATURES
Octal bus interface
3-State buffer outputs sink 24mA and source 15mA
The -1 version sinks 48 mA
DESCRIPTION
The 74ALS241A is an octal buffer that is ideal for driving bus lines or
buffer memory address registers. The outputs are all capable of
sinking 24mA and sourcing up to 15mA, producing very good
capacitive drive characteristics. The device features two output
enables, OEa and OEb, each controlling four of the 3-State outputs.
The 74ALS241A-1 sinks 48mA IOL if the VCC is limited to
5.0V
±0.25V.
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS241A
4.5ns
18mA
74ALS241A-1
4.5ns
18mA
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SF00324
OEa
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
VCC
OEb
Ya0
Ib0
Ya1
Ya2
Ib2
Ya3
Ib3
Ib1
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
DRAWING
NUMBER
20-pin plastic DIP
74ALS241AN,
74ALS241A-1N
SOT146-1
20-pin plastic SOL
74ALS241AD,
74ALS241A-1D
SOT163-1
20-pin plastic SSOP
Type II
74ALS241ADB,
74ALS241A-1DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Ian, Ibn
Data inputs
1.0/1.0
20
µA/0.1mA
OEa, OEb
Output Enable inputs (active-Low)
1.0/1.0
20
µA/0.1mA
Yan, Ybn
Data outputs
750/240
15mA/24mA
Yan, Ybn
Data outputs (-1 version)
750/480
15mA/48mA
NOTE:
One (1.0) ALS unit load is defined as: 20
µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
VCC = Pin 20
GND = Pin 10
SF00325
2
4
6
8
17
15
13
11
18
16
14
12
3
5
7
9
Ia0
Ia1 Ia2
Ia3 Ib0
Ib1 Ib2
Ib3
1
19
OEa
OEb
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
IEC/IEEE SYMBOL
2D
1
2
SF00326
1
19
2
4
6
8
17
15
13
11
EN1
EN2
18
16
14
12
3
5
7
9


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