M74ALS191P

The M74ALS191P is a semiconductor integrated circuit containing a synchronous 4-bit binary (hexadecimal) counter function with up/down control and load inputs. The typical applications include industrial and consumer equipment. There are some features as follows. First is up/down switching with up/down control input. The second is asynchronous load input provided. Then is enable input provided. Next is easy cascade connection possible. The last one is wide operating temperature range which is from -20 to +75.

What comes next is about the absolute maximum ratings (Ta=-20 to +75) of M74ALS191P. The VCC (supply voltage) is from -0.5 to +7 V. The VI (input voltage) is from -0.5 to +7 V. The VO (output voltage) is from -0.5 to VCC V. The Tstg (storage temperature) is from -65 to +150. The Topr (operating free air ambient temperature) is from -20 to +75.

The following is about the recommended operating conditions of M74ALS191P. The minimum VCC (supply voltage) is 4.5 V, the typical is 5 V and the maximum is 5.5 V. The minimum VIH (high level input voltage) is 2 V. The maximum VIL (low level input voltage) is 0.8 V. The minimum IOH (high level output current) is 0 mA and the maximum is -0.4 mA.  The minimum IOL (low level output current) is 0 mA and the maximum is 8 mA. The Topr (operating free air ambient temperature) is from -20 to +75.