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74LV257のメーカーはPhilipsです、この部品の機能は「Quad 2-input multiplexer 3-State」です。 |
部品番号 | 74LV257 |
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部品説明 | Quad 2-input multiplexer 3-State | ||
メーカ | Philips | ||
ロゴ | |||
このページの下部にプレビューと74LV257ダウンロード(pdfファイル)リンクがあります。 Total 12 pages
INTEGRATED CIRCUITS
74LV257
Quad 2-input multiplexer (3-State)
Product specification
Supersedes data of 1997 Jun 06
IC24 Data Handbook
1998 May 20
Philips
Semiconductors
1 Page Philips Semiconductors
Quad 2-input multiplexer (3-State)
Product specification
74LV257
LOGIC SYMBOL
2 3 5 6 11 10 14 13
1I0 11I 2I0 2I1 3I0 3I1 4I0 4I1
1S
15 OE
1Y 2Y 3Y 4Y
4 7 9 12
SV00637
LOGIC SYMBOL (IEEE/IEC)
1
G1
15
EN
2 1 MUX
31
5
6
11
10
14
13
4
7
9
12
SV00638
LOGIC DIAGRAM
1I1
1Y
1I0
2I1
2Y
2I0
3I1
3Y
3I0
4I1
4Y
4I0
OE
S
SV00640
1998 May 20
FUNCTIONAL DIAGRAM
2 1I0
3 1I1
5 2I0
6 2I1
11 3I0
10 3I1
14 4I0
13 4I1
SELECTOR
1Y 4
2Y 7
3–STATE
MULTIPLEXER
OUTPUTS
3Y 9
4Y 12
S
1
FUNCTION TABLE
INPUTS
OE S nl0
HXX
LHX
LHX
LLL
L LH
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
OE
15
SV00639
OUTPUTS
nl1 nY
XZ
LL
HH
XL
XH
3
3Pages Philips Semiconductors
Quad 2-input multiplexer (3-State)
Product specification
74LV257
AC CHARACTERISTICS
GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL = 1KΩ
SYMBOL
PARAMETER
WAVEFORM
CONDITION
VCC(V)
1.2
tPHL/tPLH
Propagation delay
nl0 to nY
nl1 to nY
Figure 1
2.0
2.7
3.0 to 3.6
1.2
tPHL/tPLH
Propagation delay
S to nY
Figure 1
2.0
2.7
3.0 to 3.6
1.2
tPZH/tPZL
3-State output enable time
OE to nY
Figure 2
2.0
2.7
3.0 to 3.6
1.2
tPHZ/tPLZ
3-State output disable time
OE to nY
Figure 2
2.0
2.7
3.0 to 3.6
NOTES:
1. Unless otherwise stated, all typical values are measured at Tamb = 25°C
2. Typical values are measured at VCC = 3.3 V.
LIMITS
–40 to +85 °C
MIN TYP1 MAX
–40 to +125 °C
MIN MAX
65
22 43
51
16 31
122 25
85
29 56
21 41
162 33
60
20 39
15 29
112 23
65
24 40
18 32
142 26
38
30
66
49
39
46
34
27
49
37
30
UNIT
ns
ns
ns
ns
AC WAVEFORMS
VM = 0.5 × VCC at VCC < 2.7 V
VM = 1.5 V at VCC ≥ 2.7 V
VX = VOL + 0.3 V at VCC ≥ 2.7 V
VX = VOL + 0.1 × VCC at VCC < 2.7 V
VY = VOH – 0.3 V at VCC ≥ 2.7V
VY = VOH – 0.1 × VCC at VCC < 2.7 V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VCC
S, nI0, nI1
INPUTS
GND
VOH
tPHL
VM
tPLH
nY OUTPUT
VM
VOL
SV00641
Figure 1. Input (S, nl0, nl1) to output (nY) propagation delays.
VI
OE INPUT
GND
VCC
OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
VM
tPLZ
tPZL
tPHZ
VX
VY
outputs
enabled
VM
tPZH
outputs
disabled
VM
outputs
enabled
SV00642
Figure 2. 3-State enable and disable times.
1998 May 20
6
6 Page | |||
ページ | 合計 : 12 ページ | ||
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PDF ダウンロード | [ 74LV257 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
74LV251 | 8-input multiplexer 3-State | Philips |
74LV257 | Quad 2-input multiplexer 3-State | Philips |
74LV259 | 8-bit addressable latch | Philips |