參數(shù)資料
型號： SN74LS249DW
廠商： Motorola, Inc.
英文描述： >6V Fixed Gain, Enhanced Gain 10 dBm Amplifier
中文描述： BCD碼到七段解碼器/驅(qū)動器
文件頁數(shù)： 3/8頁
文件大?。?/td> 280K
代理商： SN74LS249DW
5-404
FAST AND LS TTL DATA
SN54/74LS247
SN54/74LS248
SN54/74LS249
LS247
FUNCTION TABLE
DECIMAL
FUNCTION
INPUTS
BI/RBO
OUTPUTS
NOTE
OR
LT
RBI
D
C
B
A
a
b
c
d
e
f
g
0
1
2
3
H
H
H
H
H
X
X
X
L
L
L
L
L
L
L
L
L
L
H
H
L
H
L
H
H
H
H
H
ON
OFF
ON
ON
ON
ON
ON
ON
ON
ON
OFF
ON
ON
OFF
ON
ON
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
4
5
6
7
H
H
H
H
X
X
X
X
L
L
L
L
H
H
H
H
L
L
H
H
L
H
L
H
H
H
H
H
OFF
ON
ON
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
1
8
9
10
11
H
H
H
H
X
X
X
X
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
H
H
H
H
H
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
ON
ON
ON
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
12
13
14
15
H
H
H
H
X
X
X
X
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
H
H
H
H
H
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
BI
RBI
LT
X
H
L
X
L
X
X
L
X
X
L
X
X
L
X
X
L
X
L
L
H
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
2
3
4
LS248, LS249
FUNCTION TABLE
DECIMAL
FUNCTION
INPUTS
BI/RBO
OUTPUTS
NOTE
OR
LT
RBI
D
C
B
A
a
b
c
d
e
f
g
0
1
2
3
H
H
H
H
H
X
X
X
L
L
L
L
L
L
L
L
L
L
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
H
L
H
H
H
L
H
L
H
L
L
L
L
L
H
H
1
1
4
5
6
7
H
H
H
H
X
X
X
X
L
L
L
L
H
H
H
H
L
L
H
H
L
H
L
H
H
H
H
H
L
H
H
H
H
L
L
H
H
H
H
H
L
H
H
L
L
L
H
L
H
H
H
L
H
H
H
L
1
8
9
10
11
H
H
H
H
X
X
X
X
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
H
H
H
H
H
H
H
L
L
H
H
L
L
H
H
L
H
H
H
H
H
H
L
H
L
H
H
L
L
H
H
H
H
12
13
14
15
H
H
H
H
X
X
X
X
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
H
H
H
H
H
L
H
L
L
H
L
L
L
L
L
L
L
L
H
H
L
L
L
H
L
H
H
H
L
H
H
H
L
BI
RBI
LT
X
H
L
X
L
X
X
L
X
X
L
X
X
L
X
X
L
X
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
L
L
H
2
3
4
H = HIGH Level, L = LOW Level, X = Irrelevant
NOTES: 1. The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are desired. The ripple-blanking input (RBI) must
NOTES: 1.
be open or high if blanking of a decimal zero is not desired.
2. When a low logic level is applied directly to the blanking input (BI), all segment outputs are off regardless of the level of any other input.
3. When ripple-blanking input (RBI) and inputs A, B, C, and D are at a low level with the lamp test input high, all segment outputs go off and the
NOTES: 1.
ripple-blanking output (RBO) goes to a low level (response condition).
4. When the blanking input/ripple blanking output (BI/RBO) is open or held high and a low is applied to the lamp-test input, all segment outputs are on.
BI/RBO is wire-AND logic serving as blanking input (BI) and/or ripple-blanking output (RBO).
相關PDF資料
PDF描述
SN74LS249N >6V Fixed Gain Amp, High Gain, Minimum Feedback
SN54LS256 Octal Buffer/Line Driver, 3 State; Package: 20 LEAD PDIP; No of Pins: 20; Container: Rail; Qty per Container: 18
SN54LS256J Octal Buffer/Line Driver, 3 State; Package: 20 LEAD PDIP; No of Pins: 20; Container: Rail; Qty per Container: 18
SN74LS256D >6V Fixed Gain, High Dynamic Range Amplifier
SN74LS256N >6V Fixed Gain Amp, High Gain, Minimum Feedback
相關代理商/技術參數(shù)
參數(shù)描述
SN74LS24AD 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:
SN74LS24AN 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:LS SERIES, QUAD 2-INPUT NAND GATE, PDIP14
SN74LS251D 功能描述:編碼器、解碼器、復用器和解復用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
SN74LS251DE4 功能描述:編碼器、解碼器、復用器和解復用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
SN74LS251DG4 功能描述:編碼器、解碼器、復用器和解復用器 8Ln To 1Ln Data Selector Multiplexer RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*