CD74HC280集成电路（IC）的奇偶校验发生器校验器规格书PDF中文资料

CD74HC280属于集成电路（IC）的奇偶校验发生器校验器。由德州仪器制造生产的CD74HC280奇偶校验发生器和校验器逻辑奇偶校验发生器和校验器系列器件是元件级器件，用于评估设置为 1 的数字字中的位数，并另外生成（或评估）一个奇偶校验位，指示设置为 1 的字中的位数是偶数还是奇数。此功能通常用作检测在传输过程中可能引入的数据错误的简单方法。

特性 Features

• Typical Propagation Delay = 17ns at VCC = 5V,

CL = 15pF, TA = 25oC

• Replaces LS180 Types

• Easily Cascadable

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1μA at VOL, VOH

描述 Description

The ’HC280 and ’HCT280 are 9-bit odd/even parity, generator

checker devices. Both even and odd parity outputs are

available for checking or generating parity for words up to nine

bits long. Even parity is indicated (ΣE output is high) when an

even number of data inputs is high. Odd parity is indicated

(ΣO output is high) when an odd number of data inputs is

high. Parity checking for words larger than 9 bits can be

accomplished by tying the ΣE output to any input of an

additional HC/HCT280 parity checker.