MC74HCT157A
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Quad 2-Input Data Selector/Multiplexer with LSTTL-patible Inputs
High- Performance Silicon- Gate CMOS
The MC74HCT157A is identical in pinout to the LS157. This device may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. 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 HCT157A is similar in function to the HC257 which has 3- state outputs.
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- - Output Drive Capability: 10 LSTTL Loads TTL NMOS patible Input Levels Outputs Directly Interface to CMOS, NMOS and TTL Operating Voltage Range: 4.5 to 5.5 V Low Input Current: 1.0 µA In pliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip plexity: 102 FETs or 25.5 Equivalent Gates LOGIC DIAGRAM
A0 NIBBLE A INPUTS A1 A2 A3 B0 NIBBLE B INPUTS B1 B2 B3 2 5 11 14...
