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參數(shù)資料
| 型號： | 933795000602 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 編、解碼器及復(fù)用、解復(fù)用 |
| 英文描述： | F/FAST SERIES, OTHER DECODER/DRIVER, CONFIGURABLE OUTPUT, PDIP20 |
| 封裝： | PLASTIC, SOT-146-1. DIP-20 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大小： | 95K |
| 代理商： | 933795000602 |
Philips Semiconductors
Product specification
74F538
1-of-8 decoder (3-State)
2
1989 Apr 06
853–1273 96267
DESCRIPTION
The 74F538 decoder/demultiplexer accepts three address (A0 - A2)
input signals and decodes them to select one of eight mutually
exclusive outputs. A Polarity control (P) input determines whether
the outputs are active Low or active High. The 74F538 has 3-State
outputs, and a High signal on the Output Enables (OEn) inputs will
force all outputs to the high impedance state. Two active High (E2,
E3) and two active Low (E0, E1) inputs are available for easy
expansion to 1-of-32 decoding with four packages, or for data
demultiplexing to 1-of-8 or 1-of-16 destinations.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL SUPPLY
CURRENT
(TOTAL)
74F538
8.5ns
35mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
PKG DWG #
20-Pin Plastic DIP
N74F538N
SOT146-1
20-Pin Plastic SOL
N74F538D
SOT163-1
PIN CONFIGURATION
20
19
18
17
16
15
14
13
12
10
11
9
8
7
6
5
4
3
2
1
VCC
Q3
Q4
A2
E2
E3
P
Q7
Q2
Q1
Q0
A0
A1
Q5
Q6
GND
E0
E1
OE1
OE0
SF00996
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
A0 - A2
Address inputs
1.0/1.0
20
A/0.6mA
E0, E1
Enable inputs (active Low)
1.0/1.0
20
A/0.6mA
E2, E3
Enable inputs (active High)
1.0/1.0
20
A/0.6mA
P
Polarity control input
1.0/1.0
20
A/0.6mA
OE0, OE1
Output Enable inputs
1.0/1.0
20
A/0.6mA
Q0 - Q7
Data outputs
150/40
3.0mA/24mA
NOTE: One (1.0) FAST Unit Load is defined as: 20
A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
67
17
VCC = Pin 20
GND = Pin 10
321
19
18
89
11
Q0
Q1
Q2
Q3
Q4 Q5
Q6
Q7
P
E0
E1
E2
E3
OE0
OE1
12
16
15
14
13
4
5
A0
A1
A2
SF00997
LOGIC SYMBOL (IEEE/IEC)
6
7
17
13
19
DMUX
1
2
3
5
0,8
0
2
G
0
7
SF00998
11
9
8
18
1,8
2,8
3,8
4,8
5,8
6,8
7,8
14
15
16
4
&
N8
EN
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