MC74HCT157A

* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions.
?Derating - Plastic DIP: 10 mW/°C from 65° to 125°C
                    Ceramic DIP: 10 mW/°C from 100
to 125°C
                    SOIC Package: 7 mW/°C from 65
to 125°C
 SSOP or TSSOP Package: 6.1 mW/°C from 65
to 125°C
For high frequency or heavy load considerations, see Chapter 2 of the Motorola HighSpeed CMOS Data Book (DL129/D).

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 3state outputs.
• Output Drive Capability: 10 LSTTL Loads
• 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
• In Compliance with the Requirements Defined by JEDEC Standard No. 7A
• Chip Complexity: 102 FETs or 25.5 Equivalent Gates