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| 型号： | SN74ALS677ADWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 算术逻辑单元 |
| 英文描述： | ALS SERIES, 16-BIT ADDRESS COMPARATOR, INVERTED OUTPUT, PDSO24 |
| 封装： | PLASTIC, SO-24 |
| 文件页数： | 5/7页 |
| 文件大小： | 124K |
| 代理商： | SN74ALS677ADWR |
SN74ALS677A
16BIT ADDRESS COMPARATOR
SDAS012C JUNE 1982 REVISED JANUARY 1995
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
APPLICATION INFORMATION
The SN74ALS677A can be wired to recognize any one of 216 addresses. The number of lows in the address
determines the input pattern for the P inputs. Those system address lines that are low in the address to be recognized
are connected to the lowest-numbered A inputs of the address comparator. The system address lines that are high
are connected to the highest-numbered A inputs.
For example, assume the comparator is to enable a device when the 16-bit system address is:
A15 A14 A13 A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
H
L
H
L
HH
L
HHHH
Because the address contains six lows and ten highs, the following connections are made:
P3 to 0 V, P2 to V
CC, P1 to VCC, and P0 to 0 V
System address lines A13, A12, A9, A8, A5, and A4 to comparator inputs A1 through A6 in any
convenient order
The remaining ten system address lines to comparator inputs A7 through A16 in any convenient order
The output provides an active-low enabling signal.
Figure 1 shows a modulo-N synchronous counter. The
′ALS163B provides a low-level clear signal when N = FEFF16.
CLR
CLK
1R
C1/+
CTR 16
Four
′ALS163B
Maximum
Count
EN
0
3
P0
P1
P2
P3
VCC
G
P
[P = 1]
[ADDRESS
COMP]
A1
A2 A16
FEFF16 = HHHH HHHL HHHH HHHH
15
12
8
4
0
9...15
8
0...7
SN74ALS677A
8
715
Figure 1. Modulo-N Synchronous Counter
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| SN74ALS680DWR | ALS SERIES, 12-BIT ADDRESS COMPARATOR, INVERTED OUTPUT, PDSO20 |
| SN74ALS688FN-00 | ALS SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PQCC20 |
| SNJ54ALS689FH-00 | ALS SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CQCC20 |
| SN54ALS689J-00 | ALS SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CDIP20 |
| SN74ALS689N-10 | ALS SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDIP20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74ALS677ANT | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| SN74ALS679DW | 功能描述:校验器 IC 12-Bit Address Comparators RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| SN74ALS679DWE4 | 功能描述:校验器 IC 12-Bit Address Comparators RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| SN74ALS679DWG4 | 功能描述:校验器 IC 12B Address Comparators RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| SN74ALS679N | 功能描述:校验器 IC 12-Bit Address Comparators RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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