CD74HCT237集成电路（IC）的信号开关多路复用器解码器规格书PDF中文资料

特性 Features

• Select One of Eight Data Outputs

- Active Low for CD74HC137 and CD74HCT137

- Active High for ’HC237 and CD74HCT237

• l/O Port or Memory Selector

• Two Enable Inputs to Simplify Cascading

• Typical Propagation Delay of 13ns at VCC = 5V,

15pF, TA = 25oC (CD74HC237)

• 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