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| 型號： | SN74ALS679DW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 12-BIT ADDRESS COMPARATOR |
| 中文描述： | 12位地址比較器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大小： | 117K |
| 代理商： | SN74ALS679DW |
SN74ALS679
12-BIT ADDRESS COMPARATOR
SDAS003C – JUNE 1982 – REVISED JANUARY 1995
Copyright
1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
12-Bit Address Comparator With Enable
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (N) 300-mil DIPs
description
This 12-bit address comparator simplifies
addressing of memory boards and/or other
peripheral devices. The four P inputs are normally
hardwired with a preprogrammed address. An
internal
decoder
determines
information applied to the A inputs must be low or
high to cause a low state at the Y output. For
example, a positive-logic bit combination of 0111
(decimal 7) at the P input determines that inputs A1 through A7 must be low and that inputs A8 through A12 must
be high to cause the output to go low. Equality of the address applied at the A inputs to the preprogrammed
address is indicated by the output being low.
what
input
This device features an enable (G) input. When G is low, the device is enabled. When G is high, the device is
disabled and the output is high, regardless of the A and P inputs.
The SN74ALS679 is characterized for operation from 0
°
C to 70
°
C.
FUNCTION TABLE
INPUTS
OUTPUT
Y
G
L
P3
L
P2
L
P1
L
P0
L
A1
H
A2
H
A3
H
A4
H
A5
H
A6
H
A7
H
A8
H
A9
H
A10
H
A11
H
A12
H
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
L
L
L
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
H
L
H
L
L
L
L
L
H
H
H
H
H
H
H
L
L
L
H
H
L
L
L
L
L
L
L
H
H
H
H
H
H
L
L
L
H
H
H
L
L
L
L
L
L
L
H
H
H
H
H
L
L
H
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
L
L
H
L
L
H
L
L
L
L
L
L
L
L
L
H
H
H
L
L
H
L
H
L
L
L
L
L
L
L
L
L
L
L
H
H
L
L
H
L
H
H
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
H
H
L
L
L
L
L
L
L
L
L
L
H
H
H
L
L
H
H
L
H
L
L
L
L
L
L
L
L
L
H
H
L
L
H
H
H
L
L
L
L
L
L
L
L
L
L
L
H
L
L
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
All other combinations
H
H
Any combination
H
The three shaded rows of the function table show combinations that would normally not be used in address
comparator applications. The logic symbols above are not valid for these combinations in which P = 12, 13, and 14.
If symbols valid for all combinations are required, starting with the fourth exclusive-OR from the bottom, change P
≥
9
to P = 9 . . . 11/13 . . . 15, P
≥
10 to P = 10/11/14/15, and P
≥
11 to P = 11/15.
DW OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
A1
A2
A3
A4
A5
A6
A7
A8
A9
GND
V
CC
G
Y
P3
P2
P1
P0
A12
A11
A10
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ALS679DWE4 | 功能描述:校驗(yàn)器 IC 12-Bit Address Comparators RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| SN74ALS679DWG4 | 功能描述:校驗(yàn)器 IC 12B Address Comparators RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| SN74ALS679N | 功能描述:校驗(yàn)器 IC 12-Bit Address Comparators RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| SN74ALS679NE4 | 功能描述:校驗(yàn)器 IC 12-Bit Address Comparators RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| SN74ALS679NS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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