器件名称: SL74HCT139
功能描述: Dual 1-of-4 Decoder/Demultiplexer(High-Performance Silicon-Gate CMOS)
文件大小: 46.5KB 共5页
简 介:SL74HCT139
Dual 1-of-4 Decoder/Demultiplexer
High-Performance Silicon-Gate CMOS
The SL74HCT139A is identical in pinout to the LS/ALS139. The SL74HCT139A may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. This device consists of two independent 1-of-4 decoders, each of which decodes a two-bit Address to one-of-four active-low outputs. Active-low Selects are provided to facilitate the demultiplexing and cascading functions. The demultiplexing function is accomplished by using the Address inputs to select the desired device output, and utilizing the Select as a data input. TTL/NMOS Compatible Input Levels Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 4.5 to 5.5 V Low Input Current: 1.0 A
ORDERING INFORMATION SL74HCT139N Plastic SL74HCT139D SOIC TA = -55° to 125° C for all packages
PIN ASSIGNMENT LOGIC DIAGRAM
FUNCTION TABLE
Inputs Select PIN 16 =VCC PIN 8 = GND H L L L L A1 X L L H H A0 X L H L H Y0 H L H H H Outputs Y1 H H L H H Y2 H H H L H Y3 H H H H L
X = don’t care
SLS
System Logic Semiconductor
SL74HCT139
MAXIMUM RATINGS *
Symbol VCC VIN VOUT IIN IOUT ICC PD Tstg TL
*
Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Current, per Pin DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Plastic DIP+ SOIC Package+ Storage Temperature Lead Temperature, 1 mm from Case……
