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參數資料
| 型號： | MC74ACT259N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-BIT ADDRESSABLE LATCH |
| 中文描述： | ACT SERIES, LOW LEVEL TRIGGERED D LATCH, TRUE OUTPUT, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 236K |
| 代理商： | MC74ACT259N |
5-1
FACT DATA
The MC74AC259/74ACT259 is a high-speed 8-bit addressable latch designed for
general purpose storage applications in digital systems. It is a multifunctional device
capable of storing single line data in eight addressable latches, and also a 1-of-8
decoder and demultiplexer with active HIGH outputs. The device also incorporates
an active LOW Common Clear for resetting all latches, as well as an active LOW
Enable. It is functionally identical to the ALS259 8-bit addressable latch.
Serial-to-Parallel Conversion
Eight Bits of Storage with Output of Each Bit Available
Random (Addressable) Data Entry
Active High Demultiplexing or Decoding Capability
Easily Expandable
Common Clear
FUNCTIONAL DESCRIPTION
The MC74AC259/74ACT259 has four modes of operation as shown in the Mode
Selection Table. In the addressable latch mode, data on the Data line (D) is written
into the addressed latch. The addressed latch will follow the data input with all non-
addressed latches remaining in their previous states in the memory mode. All latches
remain in their previous state and are unaffected by the Data or Address inputs.
In the one-of-eight decoding or demultiplexing mode, the addressed output will
follow the state of the D input with all other outputs in the LOW state. In the clear
mode all outputs are LOW and unaffected by the address and data inputs. When
operating the MC74AC/ACT259 as an addressable latch, changing more than one
bit of the address could impose a transient wrong address. Therefore, this should
only be done while in the memory mode. The Mode Select Function Table
summarizes the operations of the MC74AC/ACT259.
8-BIT
ADDRESSABLE
LATCH
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
A0
A1
A2
E
D
MR Q0Q1Q2Q3Q4Q5Q6Q7
15
16
14
13
12
11
10
2
1
3
4
5
6
7
VCC
9
8
MR
E
D
Q7
Q6
Q5
Q4
A0
A1
A2
Q0
Q1
Q2
Q3
GND
相關PDF資料 |
PDF描述 |
|---|---|
| MC74AC259N | 8-BIT ADDRESSABLE LATCH |
| MC74AC273DW | OCTAL D FLIP-FLOP |
| MC74AC273DT | OCTAL D FLIP-FLOP |
| MC74AC273DTR2 | OCTAL D FLIP-FLOP |
| MC74ACT273DTR2 | OCTAL D FLIP-FLOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC74ACT259NG | 功能描述:閉鎖 5V 8-Bit Addressable RoHS:否 制造商:Micrel 電路數量:1 邏輯類型:CMOS 邏輯系列:TTL 極性:Non-Inverting 輸出線路數量:9 高電平輸出電流: 低電平輸出電流: 傳播延遲時間: 電源電壓-最大:12 V 電源電壓-最小:5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-16 封裝:Reel |
| MC74ACT273 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Octal D Flip−Flop |
| MC74ACT273DT | 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述: |
| MC74ACT273DTR2 | 功能描述:觸發器 5V CMOS Octal RoHS:否 制造商:Texas Instruments 電路數量:2 邏輯系列:SN74 邏輯類型:D-Type Flip-Flop 極性:Inverting, Non-Inverting 輸入類型:CMOS 輸出類型: 傳播延遲時間:4.4 ns 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:X2SON-8 封裝:Reel |
| MC74ACT273DTR2G | 功能描述:觸發器 5V CMOS Octal D-Type RoHS:否 制造商:Texas Instruments 電路數量:2 邏輯系列:SN74 邏輯類型:D-Type Flip-Flop 極性:Inverting, Non-Inverting 輸入類型:CMOS 輸出類型: 傳播延遲時間:4.4 ns 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:X2SON-8 封裝:Reel |
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