參數(shù)資料
型號(hào): HD74HC299
廠商: Hitachi,Ltd.
英文描述: 8-bit Universal Shift/Storage Register (with 3-state outputs)
中文描述: 8位通用移位/存儲(chǔ)寄存器(3態(tài)輸出)
文件頁數(shù): 1/11頁
文件大?。?/td> 81K
代理商: HD74HC299
HD74HC299
8-bit Universal Shift/Storage Register (with 3-state outputs)
Description
The HD74HC299 features multiplexed inputs/outputs to achieve full 8-bit data handling in a single 20-pin
package. Due to the large output drive capability and 3-state feature, this device is ideally suited for
interfacing with bus lines in a bus oriented system. Two function select inputs and two output control
inputs are used to choose the mode of operation as listed in the function table. Synchronous parallel
loading is accomplished by taking both function select lines S
0
and S
1
high. This places the 3-state outputs
in a high impedance state, which permits data applied to the input/output lines to be clocked into the
register. Reading out of the register can be done while the outputs are enabled in any mode. A direct
overriding clear input is provided to clear the register whether the outputs are enabled or disabled.
Features
High Speed Operation
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: V
CC
= 2 to 6 V
Low Input Current: 1 μA max
Low Quiescent Supply Current: I
CC
(static) = 4 μA max (Ta = 25°C)
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