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DM74ALS646NT

更新时间： 2024-11-22 22:15:27
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 总线驱动器总线收发器触发器逻辑集成电路光电二极管
页数 文件大小 规格书
6页 59K
描述
Octal 3-STATE Bus Transceiver and Register

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中文翻译

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DM74ALS646NT 技术参数

是否Rohs认证：符合生命周期：Obsolete
零件包装代码：DIP包装说明：0.300 INCH, PLASTIC, MS-001, DIP-24
针数：24Reach Compliance Code：unknown
HTS代码：8542.39.00.01风险等级：5.32
Is Samacsys：N控制类型：INDEPENDENT CONTROL
计数方向：BIDIRECTIONAL系列：ALS
JESD-30 代码：R-PDIP-T24JESD-609代码：e3
长度：31.915 mm逻辑集成电路类型：REGISTERED BUS TRANSCEIVER
最大I（ol）：0.048 A位数：8
功能数量：1端口数量：2
端子数量：24最高工作温度：70 °C
最低工作温度：输出特性：3-STATE
输出极性：TRUE封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP24,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT APPLICABLE电源：5 V
最大电源电流（ICC）：88 mAProp。Delay @ Nom-Sup：20 ns
传播延迟（tpd）：20 ns认证状态：Not Qualified
座面最大高度：5.08 mm子类别：Bus Driver/Transceivers
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：4.5 V
标称供电电压 (Vsup)：5 V表面贴装：NO
技术：TTL温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT APPLICABLE翻译：N/A
触发器类型：POSITIVE EDGE宽度：7.62 mm
Base Number Matches：1

DM74ALS646NT 数据手册

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October 1986  
Revised February 2000  
DM74ALS646  
Octal 3-STATE Bus Transceiver and Register  
General Description  
Features  
This device incorporates an octal bus transceiver and an  
octal D-type register configured to enable multiplexed  
transmission of data from bus to bus or internal register to  
bus.  
■ Switching specifications at 50 pF  
■ Switching specifications guaranteed over full tempera-  
ture and VCC range  
■ Advanced oxide-isolated, ion-implanted Schottky TTL  
This bus transceiver features totem-pole 3-STATE outputs  
designed specifically for driving highly-capacitive or rela-  
tively low-impedance loads. The high-impedance state and  
increased high-logic level drive provides this device with  
the capability of being connected directly to and driving the  
bus lines in a bus-organized system without the need for  
interface or pull-up components. They are particularly  
attractive for implementing buffer registers, I/O ports, bidi-  
rectional bus drivers, and working registers.  
process  
■ 3-STATE buffer outputs drive bus lines directly  
■ Multiplexed real-time and stored data  
■ Independent registers for A and B buses  
The registers in the DM74ALS646 are edge-triggered D-  
type flip-flops. On the positive transition of the clock (CAB  
or CBA), the input bus data is stored into the appropriate  
register. The CAB input controls the transfer of data into  
the A register and the CBA input controls the B register.  
The SAB and SBA control pins are provided to select  
whether real-time data or stored data is transferred. A LOW  
input level selects real-time data, and a HIGH level selects  
stored data. The select controls have a “make before  
break” configuration to eliminate a glitch which would nor-  
mally occur in a typical multiplexer during the transition  
between store and real-time data.  
The enable G and direction control pins provide four modes  
of operation: real-time data transfer from bus A to B, real-  
time data transfer from bus B to A, real-time bus A and/or B  
data transfer to internal storage, or internally stored data  
transfer to bus A or B.  
When the enable G pin is LOW, the direction pin selects  
which bus receives data. When the enable G pin is HIGH,  
both buses become disabled yet their input function is still  
enabled.  
Ordering Code  
Order Number Package Number  
Package Description  
DM74ALS646WM  
DM74ALS646NT  
M24B  
N24C  
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide  
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide  
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.  
© 2000 Fairchild Semiconductor Corporation  
DS009172  
www.fairchildsemi.com  
123456

中文翻译

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DM74ALS646NT 替代型号

型号 品牌 替代类型 描述 数据表
DM74ALS646WM FAIRCHILD

完全替代

 Octal 3-STATE Bus Transceiver and Register
SN74ALS646A-1DW TI

功能相似

 Octal Registered Bus Transceivers with 3-State Outputs 24-SOIC 0 to 70

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DM74ALS646NT/A+ ETC

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 		Single 8-bit Bus Transceiver
DM74ALS646WM FAIRCHILD

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 		Octal 3-STATE Bus Transceiver and Register
DM74ALS646WM/A+ ETC

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DM74ALS646WMX ETC

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 		Single 8-bit Bus Transceiver
DM74ALS648N ROCHESTER

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 		Registered Bus Transceiver, ALS Series, 1-Func, 8-Bit, Inverted Output, TTL, PDIP24, PLAST
DM74ALS648N TI

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 		ALS SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24, PLASTIC, DIP-24
DM74ALS648N NSC

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 		IC ALS SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24, PLASTIC, DIP-24, Bus
DM74ALS648N/A+ ETC

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 		Single 8-Bit Inverting Bus Transceiver

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