SN54AS821A_TI 具有三态输出的 10 位总线接口触发器

SN54AS821A的基本参数

制造厂商：TI
产品类别：逻辑和电压转换
技术类目：触发器、锁存器和寄存器 - D 型触发器
功能描述：具有三态输出的 10 位总线接口触发器
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SN54AS821A的产品详情：

These 10-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers.

The ten flip-flops are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are true to the data (D) input.

A buffered output-enable () input can be used to place the ten outputs in either a normal logic state (high or low logic levels) or a high-
impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

does not affect the internal operation of the flip-flops. Previously stored data can be retained or new data can be entered while the outputs are in the high-impedance state.

The SN54AS821A is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74AS821A is characterized for operation from 0°C to 70°C.

SN54AS821A的优势和特性：

Functionally Equivalent to AMD's AM29821
Provide Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity
Outputs Have Undershoot-Protection Circuitry
Power-Up High-Impedance State
Buffered Control Inputs to Reduce dc Loading Effects
Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPs

SN54AS821A的参数（英文）：

Number of channels (#)
10
Technology Family
AS
Supply voltage (Min) (V)
4.5
Supply voltage (Max) (V)
5.5
Input type
Bipolar
Output type
3-State
Clock Frequency (Max) (MHz)
125
IOL (Max) (mA)
48
IOH (Max) (mA)
-24
ICC (Max) (uA)
113000
Features
High speed (tpd 10-50ns)

SN54AS821A具体的完整产品型号参数及价格（美元）：

SN54AS821A的完整型号有：5962-9078001MLA、SN54AS821AJT、SNJ54AS821AJT，以下是这些产品的关键参数及官网采购报价：

5962-9078001MLA，工作温度：-55 to 125，封装：CDIP (JT)-24，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-9078001MLA的批量USD价格：18.545（1000+）

SN54AS821AJT，工作温度：-55 to 125，封装：CDIP (JT)-24，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SN54AS821AJT的批量USD价格：19.284（1000+）

SNJ54AS821AJT，工作温度：-55 to 125，封装：CDIP (JT)-24，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网SNJ54AS821AJT的批量USD价格：18.545（1000+）

SN54AS821A的评估套件：

SN54AS821A的电路图解：

SN54AS821A的评估套件：