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参数资料
| 型号： | 74ALS240A-1DB |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 通用总线功能 |
| 英文描述： | Octal inverter buffer 3-State |
| 中文描述： | ALS SERIES, DUAL 4-BIT DRIVER, INVERTED OUTPUT, PDSO20 |
| 封装： | 5.30 MM, PLASTIC, SSOP-20 |
| 文件页数： | 2/9页 |
| 文件大小： | 114K |
| 代理商： | 74ALS240A-1DB |
Philips Semiconductors
Product specification
74ALS240A/
74ALS240A-1
Octal inverter buffer (3-State)
2
1991 Feb 08
853–1244 01670
FEATURES
Octal bus interface
3-State buffer outputs sink 24mA and source 15mA
The -1 version sinks 48 mA
DESCRIPTION
The 74ALS240A 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 74ALS240A-1 sinks 48 mA I
OL
if the V
CC
is limited to
5.0V
±
0.25V.
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS240A
4.5ns
15mA
74ALS240A-1
4.5ns
15mA
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SF00320
OEa
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
V
CC
OEb
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
DRAWING
NUMBER
20-pin plastic DIP
74ALS240AN,
74ALS240A-1N
SOT146-1
20-pin plastic SOL
74ALS240AD,
74ALS240A-1D
SOT163-1
20-pin plastic SSOP
Type II
74ALS240ADB,
74ALS240A-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
μ
A/0.1mA
20
μ
A/0.1mA
OEa, OEb
Output Enable inputs (active-Low)
1.0/1.0
Yan, Ybn
Data outputs
750/240
15mA/24mA
Yan, Ybn
One (1.0) ALS unit load is defined as: 20
μ
A in the High state and 0.1mA in the Low state.
Data outputs (-1 version)
750/480
15mA/48mA
NOTE:
LOGIC SYMBOL
V
= Pin 20
GND = Pin 10
SF00321
1
19
OEa
OEb
2
4
6
8
17
15
13
11
18
16
14
12
3
5
7
9
Ia0
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
IEC/IEEE SYMBOL
2D
1
2
SF00322
1
19
EN1
EN2
4
2
6
8
17
15
13
11
18
16
14
12
3
5
7
9
相关PDF资料 |
PDF描述 |
|---|---|
| 74ALS240ADB | Octal inverter buffer 3-State |
| 74ALS240AN | Octal inverter buffer 3-State |
| 74ALS240A | Octal inverter buffer 3-State |
| 74ALS240A-1 | Octal inverter buffer 3-State |
| 74ALS240A-1D | Octal inverter buffer 3-State |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 74ALS240A-1N | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Octal inverter buffer 3-State |
| 74ALS240AD | 制造商:NXP Semiconductors 功能描述: |
| 74ALS240ADB | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Octal inverter buffer 3-State |
| 74ALS240AN | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Octal inverter buffer 3-State |
| 74ALS241A | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Octal buffer 3-state |
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