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参数资料
| 型号： | SN54LS490W |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 计数器 |
| 英文描述： | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CDFP16 |
| 封装： | CERAMIC, DFP-16 |
| 文件页数： | 2/9页 |
| 文件大小： | 147K |
| 代理商： | SN54LS490W |
SN54LS490, SN74LS490
DUAL 4-BIT DECADE COUNTERS
SDLS125A – OCTOBER 1976 – REVISED JULY 1998
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
BCD COUNT SEQUENCE
(each counter)
COUNT
OUTPUTS
COUNT
QD
QC
QB
QA
0
L
1
L
LL
H
2
L
LH
L
3
L
LH
H
4
L
HL
L
5
L
HLH
6
L
HH
L
7
L
HH
H
8
H
LL
L
9
H
L
H
logic symbol
CTRDIV10
CT=0
2
1CLR
CT=9
4
1SET9
1
1CLK
+
3
0
5
6
7
3
14
2CLR
12
2SET9
15
2CLK
13
11
10
9
CT
1QA
1QB
1QC
1QD
2QA
2QB
2QC
2QD
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, N, and W packages.
相关PDF资料 |
PDF描述 |
|---|---|
| SN74LS490D | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDSO16 |
| SN54LS490FK | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CQCC20 |
| SN54LS498L883B | PARALLEL IN PARALLEL OUT SHIFT REGISTER, MQCC28 |
| SN54LS498JS883B | PARALLEL IN PARALLEL OUT SHIFT REGISTER, CDIP24 |
| SN54LS498JS | PARALLEL IN PARALLEL OUT SHIFT REGISTER, CDIP24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN54LS49J | 制造商:Texas Instruments 功能描述:Decoder/Driver Single 4-to-7 14-Pin CDIP Tube |
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| SN54LS51J | 制造商:Texas Instruments 功能描述:AND-OR-Invert Gate 2-Element 2 Wide 2-IN/3-IN Bipolar 14-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:AND-OR-INVERT GATE 2-ELEM 2 WIDE 2-IN BIPOLAR 14CDIP - Rail/Tube |
| SN54LS534J883B | 制造商:MMI 功能描述:NEW |
| SN54LS540J | 制造商:Texas Instruments 功能描述:Buffer/Line Driver 8-CH Inverting 3-ST Bipolar 20-Pin CDIP Tube 制造商:Texas Instruments 功能描述:BFFR/LINE DRVR 8CH INV 3-ST BIPOLAR 20CDIP - Rail/Tube |
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