器件名称:
74HC157
功能描述:
Quad 2-Input Data Selectors/Multiplexers
文件大小:
222.08KB 共6页
简 介:
MOTOROLA SEMICONDUCTOR TECHNICAL DATA Quad 2-Input Data Selectors/Multiplexers High–Performance Silicon–Gate CMOS The MC54/74HC157A is identical in pinout to the LS157. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device routes 2 nibbles (A or B) to a single port (Y) as determined by the Select input. The data is presented at the outputs in noninverted form. A high level on the Output Enable input sets all four Y outputs to a low level. The HC157A is similar in function to the HC257 which has 3–state outputs. Output Drive Capability: 10 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2.0 to 6.0 V Low Input Current: 1.0 A High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 82 FETs or 20.5 Equivalent Gates MC54/74HC157A J SUFFIX CERAMIC PACKAGE CASE 620–10 1 16 16 1 N SUFFIX PLASTIC PACKAGE CASE 648–08 D SUFFIX SOIC PACKAGE CASE 751B–05 DT SUFFIX TSSOP PACKAGE CASE 948F–01 16 1 16 1 ORDERING INFORMATION MC54HCXXXAJ MC74HCXXXAN MC74HCXXXAD MC74HCXXXADT Ceramic Plastic SOIC TSSOP LOGIC DIAGRAM 2 5 11 14 4 3 6 10 13 7 9 12 Y0 Y1 Y2 Y3 DATA OUTPUTS A0 NIBBLE A INPUTS A1 A2 A3 B0 NIBBLE B INPUTS B1 B2 B3 PIN ASSIGNMENT SELECT A0 B0 Y0 A1 B1 Y1 GND 1 15 PIN 16 = VCC PIN 8 = GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OUTPUT ENABLE A3 B3 Y3 A2 B2 Y2 SELECT O……
