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參數(shù)資料
| 型號： | SN74LS249 |
| 廠商： | Motorola, Inc. |
| 英文描述： | BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS |
| 中文描述： | BCD碼到七段解碼器/驅(qū)動器 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 280K |
| 代理商： | SN74LS249 |
5-402
FAST AND LS TTL DATA
BCD-TO-SEVEN-SEGMENT
DECODERS/DRIVERS
The SN54/74LS247 thru SN54/74LS249 are BCD-to-Seven-Segment
Decoder/Drivers.
The LS247 and LS248 are functionally and electrically identical to the LS47
and LS48 with the same pinout configuration. The LS249 is a 16-pin version
of the 14-pin LS49 and includes full functional capability for lamp test and
ripple blanking which was not available in the LS49.
The composition of all characters, except the 6 and 9 are identical between
the LS247, 248, 249 and the LS47, 48 and 49. The LS47 thru 49 compose
the and without tails, the LS247 thru 249 compose the and with
the tails. The LS247 has active-low outputs for direct drive of indicators. The
LS248 and 249 have active-high outputs for driving lamp buffers.
All types feature a lamp test input and have full ripple-blanking input/output
controls. On all types an automatic leading and/or trailing-edge zero-blanking
control (RBI and RBO) is incorporated and an overriding blanking input (BI)
is contained which may be used to control the lamp intensity by pulsing or to
inhibit the output’s lamp test may be performed at any time when the BI/RBO
node is at high level. Segment identification and resultant displays are shown
below. Display pattern for BCD input counts above 9 are unique symbols to
authenticate input conditions.
LS247
Open-Collector Outputs Drive Indicators Directly
Lamp-Test Provision
Leading/Trailing Zero Suppression
LS248
Internal Pull-Ups Eliminate Need for External Resistors
Lamp-Test Provision
Leading/Trailing Zero Suppression
LS249
Open-Collector Outputs
Lamp-Test Provision
Leading/Trailing Zero Suppression
SEGMENT
IDENTIFICATION
NUMERICAL DESIGNATIONS AND RESULTANT DISPLAYS
SN54/74LS247
SN54/74LS248
SN54/74LS249
BCD-TO-SEVEN-SEGMENT
DECODERS/DRIVERS
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXDW SOIC
Ceramic
Plastic
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
16
1
D SUFFIX
SOIC
CASE 751B-03
相關PDF資料 |
PDF描述 |
|---|---|
| SN54LS249J | Dual 4-Input NAND Gate; Package: SOEIAJ-14; No of Pins: 14; Container: Rail; Qty per Container: 50 |
| SN74LS249DW | >6V Fixed Gain, Enhanced Gain 10 dBm Amplifier |
| 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 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LS249 WAF | 制造商:ON Semiconductor 功能描述: |
| 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 |
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