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参数资料
| 型号： | SN54HC21W |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | Up to 18V NiCd/NiMH Battery Fast Charge Controller with 177s Hold-off Time; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50 |
| 中文描述： | 双4输入阳性与门 |
| 文件页数： | 1/5页 |
| 文件大小： | 77K |
| 代理商： | SN54HC21W |
SN54HC21, SN74HC21
DUAL 4-INPUT POSITIVE-AND GATES
SCLS087C – DECEMBER 1982 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Package Options Include Plastic
Small-Outline (D) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
These devices contain two independent 4-input
AND gates. They perform the Boolean function
Y
A
B
C
D or Y
in positive logic.
A
B
C
D
The SN54HC21 is characterized for operation
over the full military temperature range of –55
°
C
to 125
°
C. The SN74HC21 is characterized for
operation from –40
°
C to 85
°
C.
FUNCTION TABLE
(each gate)
INPUTS
B
OUTPUT
Y
A
C
D
H
H
H
H
H
L
X
X
X
L
X
L
X
X
L
X
X
L
X
L
X
X
X
L
L
logic symbol
1
1A
2
1B
1Y
6
4
1C
5
1D
2Y
8
9
2A
10
2B
&
12
2C
13
2D
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.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1B
NC
1C
1D
1Y
GND
V
CC
2D
2C
NC
2B
2A
2Y
SN54HC21 . . . J OR W PACKAGE
SN74HC21 . . . D OR N PACKAGE
(TOP VIEW)
3
2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
2C
NC
NC
NC
2B
NC
NC
1C
NC
1D
1
1
N
2
2
V
2
1
G
N
SN54HC21 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
Copyright
1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
相关PDF资料 |
PDF描述 |
|---|---|
| SN54HC240FK | Up to 18V NiCd/NiMH Battery Fast Charge Controller with 177s Hold-off Time; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN54HC240J | 制造商:Texas Instruments 功能描述:Buffer/Line Driver 8-CH Inverting 3-ST CMOS 20-Pin CDIP Tube 制造商:Texas Instruments 功能描述:BFFR/LINE DRVR 8CH INV 3-ST CMOS 20CDIP - Rail/Tube |
| SN54HC241FK | 制造商: 功能描述: 制造商:undefined 功能描述: |
| SN54HC241J | 制造商:Texas Instruments 功能描述:Buffer/Line Driver 8-CH Non-Inverting 3-ST CMOS 20-Pin CDIP Tube 制造商:Texas Instruments 功能描述:BFFR/LINE DRVR 8CH NON-INV 3-ST CMOS 20CDIP - Rail/Tube |
| SN54HC244J | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:OCTAL BUFFER/LINE DRIVER - Rail/Tube 制造商:Texas Instruments 功能描述:Buffer/Line Driver 8-CH Non-Inverting 3-ST CMOS 20-Pin CDIP Tube 制造商:Texas Instruments 功能描述:Octal buffer/line driver,SN54HC244J |
| SN54HC245J | 制造商:Texas Instruments 功能描述:Bus XCVR Single 8-CH 3-ST 20-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:BUS XCVR SGL 8CH 3-ST 20CDIP - Rail/Tube |
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