KK74HC157A
KK74HC157A is Quad 2-Input Data Selectors/Multiplexer manufactured by Kodenshi AUK Group.
TECHNICAL DATA
Quad 2-Input Data Selectors/Multiplexer
The KK74HC157A is identical in pin out to the LS/ALS157. The device inputs are patible with standard CMOS outputs; with pull up resistors, they are patible with LS/ALSTTL 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 non inverted form. A high level on the Output Enable input sets all four Y outputs to a low level.
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V
- Low Input Current: 1.0 µA
- High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION KK74HC157AN Plastic KK74HC157AD SOIC TA = -55° to 125° C for all packages
PIN ASSIGNMENT LOGIC DIAGRAM
FUNCTION TABLE
Inputs Output Enable PIN 16 =VCC PIN 8 = GND H L L Select X L H Outputs Y0-Y3 L A0-A3 B0-B3
X=don’t care A0-A3, B0-B3=the levels of the respective Data-Word Inputs
..net
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 for 10 Seconds (Plastic DIP or SOIC Package)
- -
Value -0.5 to +7.0 -1.5 to VCC +1.5 -0.5 to VCC +0.5 ±20 ±25 ±50 750 500 -65 to +150 260
Unit V V V m A m A m A m W °C °C
Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Remended Operating Conditions.
- - Derating
- Plastic DIP:
- 10 m W/°C from 65° to 125°C SOIC Package: :
- 7 m W/°C from 65° to 125°C
REMENDED OPERATING CONDITIONS
Symbol VCC VIN, VOUT TA tr, tf Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage, Output Voltage (Referenced to GND) Operating...