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M74HC190C1R Datasheet(PDF) 1 Page - STMicroelectronics |
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M74HC190C1R Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 14 page M54/M74HC190 M54/M74HC191 October 1992 4 BIT SYNCHRONOUS UP/DOWN COUNTERS B1R (Plastic Package) ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) PIN CONNECTIONS (top view) NC = No Internal Connection DESCRIPTION . HIGH SPEED fMAX = 48 MHz (TYP.) AT VCC =5 V . LOW POWER DISSIPATION ICC =4 µA (MAX.) AT TA =25 °C . HIGH NOISE IMMUNITY VNIH =VNIL =28 % VCC (MIN.) . OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS . SYMMETRICAL OUTPUT IMPEDANCE IOH =IOL = 4 mA (MIN.) . BALANCED PROPAGATION DELAYS tPLH =tPHL . WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V . PIN AND FUNCTION COMPATIBLE WITH 54/74LS190/191 The M54/74HC190/191 are high speed CMOS 4-BIT SYNCHRONOUS UP/DOWN COUNTERS fabri- cated in silicon gate C 2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power con- sumption. State changes of the counter are synchronous with the LOW-to-HIGH transition of the Clock Pulse input. An asynchronous parallel load input overrides count- ing and loads the data present on the DATA inputs into the flip-flops, which makes it possible to use the cir- cuits as programmable counters. A countenable input serves as the carry/borrow input in multi-stage counters. Control input, Down/Up, determines whether a circuit counts up or down. A MAX/MIN out- put and a Ripple Clock output provide overflow/under- flow indication and make possible a variety of methods for generating carry/borrow signals in multi- stage counter applications. All inputs are equipped with protection circuits against static discharge and transient excess voltage. 1/14 |
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