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54LS279LMQB PDF预览

54LS279LMQB

更新时间: 2024-01-10 22:35:38
品牌 Logo 应用领域
美国国家半导体 - NSC 触发器锁存器逻辑集成电路输入元件
页数 文件大小 规格书
6页 140K
描述
Quad S-R Latches

54LS279LMQB 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QLCC包装说明:CERAMIC, LCC-20
针数:20Reach Compliance Code:compliant
HTS代码:8542.39.00.01风险等级:5.16
Is Samacsys:N其他特性:WITH DUAL S INPUT FOR TWO FUNCTIONS
系列:LSJESD-30 代码:S-CQCC-N20
JESD-609代码:e0长度:8.89 mm
逻辑集成电路类型:R-S LATCH最大I(ol):0.004 A
位数:2功能数量:4
端子数量:20最高工作温度:125 °C
最低工作温度:-55 °C输出极性:TRUE
封装主体材料:CERAMIC, METAL-SEALED COFIRED封装代码:QCCN
封装等效代码:LCC20,.35SQ封装形状:SQUARE
封装形式:CHIP CARRIER峰值回流温度(摄氏度):NOT SPECIFIED
电源:5 V最大电源电流(ICC):7 mA
Prop。Delay @ Nom-Sup:27 ns传播延迟(tpd):33 ns
认证状态:Not Qualified筛选级别:MIL-STD-883 Class B
座面最大高度:1.905 mm子类别:FF/Latches
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:TTL温度等级:MILITARY
端子面层:Tin/Lead (Sn/Pb)端子形式:NO LEAD
端子节距:1.27 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED触发器类型:LOW LEVEL
宽度:8.89 mmBase Number Matches:1

54LS279LMQB 数据手册

 浏览型号54LS279LMQB的Datasheet PDF文件第2页浏览型号54LS279LMQB的Datasheet PDF文件第3页浏览型号54LS279LMQB的Datasheet PDF文件第4页浏览型号54LS279LMQB的Datasheet PDF文件第5页浏览型号54LS279LMQB的Datasheet PDF文件第6页 
May 1989  
54LS279/DM54LS279/DM74LS279  
Quad S-R Latches  
General Description  
The ’LS279 consists of four individual and independent Set-  
Reset Latches with active low inputs. Two of the four latch-  
es have an additonal S input ANDed with the primary S  
input. A low on any S input while the R input is high will be  
stored in the latch and appear on the corresponding Q out-  
put as a high. A low on the R input while the S input is high  
will clear the Q output to a low. Simultaneous transistion of  
the R and S inputs from low to high will cause the Q output  
to be indeterminate. Both inputs are voltage level triggered  
and are not affected by transition time of the input data.  
Features  
Y
Alternate military/aerospace device (54LS279) is avail-  
able. Contact a National Semiconductor Sales Office/  
Distributor for specifications.  
Connection Diagram  
Dual-In-Line Package  
TL/F/6420–1  
Order Number 54LS279DMQB, 54LS279FMQB, 54LS279LMQB,  
DM54LS279J, DM74LS279M or DM74LS279N  
See NS Package Number E20A, J16A, M16A, N16E or W16A  
Function Table  
Inputs  
S(1)  
Output  
Q
R
L
L
L
H
L
H*  
H
H
H
L
H
Q
0
e
e
H
L
High Level  
Low Level  
e
Q
0
The Level of Q before the indicated input conditions were established.  
*This output level is pseudo stable; that is, it may not persist when the S and R  
inputs return to their inactive (high) level.  
Note 1: For latches with double S inputs:  
e
e
H
L
both S inputs high  
one or both S inputs low  
C
1995 National Semiconductor Corporation  
TL/F/6420  
RRD-B30M105/Printed in U. S. A.  

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