74192 (4-bit synchronous up/down decade counter)(japan)

The 74192 is a versatile 4-bit synchronous up/down decade counter

IC 74192 Counter Specifications

Feature

Specifications

High-Speed (fMAX)

54 MHz (Typical) at VCC = 5 V

Low Power Dissipation

ICC = 4 µA (Maximum) at TA = 25 °C

High Noise Immunity

VNIH = VNIL = 28% VCC (Minimum)

Output Drive Capability

Can drive 10 LSTTL (Low Power Schottky TTL) Loads

Symmetrical Output Impedance

|IOH| = IOL = 4 mA (MIN.)

Balanced Propagation Delays

tPLH = tPHL (Symmetrical)

Wide Operating Voltage Range

VCC (OPR) = 2 V to 6 V

Pin and Function Compatibility

Compatible with 54/74LS192-193

74192 IC Function

• Decimal Counting

The 74192 is a 4-bit counter, which means it can count from 0 to 9 in decimal (0000 to 1001 in binary). This makes it particularly useful in applications where you need to keep track of decimal values, such as digital clocks, timers, or systems that require decimal counting sequences.

• Reset to Zero

The IC features a clear input (CLR) that allows you to reset the counter to zero at any time by applying a high signal to this input. This is essential for starting a counting sequence from the beginning or for manual control over when the counter should be reset.

• Preset Capability

The 74192 IC enables you to preset the counter to a specific value before counting begins. This is accomplished by loading a binary value onto its data inputs (Input A - Input D) and then triggering the asynchronous parallel load input (Load) with a LOW signal. This preset capability is valuable in scenarios where you need the counter to start from a non-zero initial value.

• Bi-Directional Counting

The IC can count in both directions – up and down. It increments the count value on the low-to-high transition of the UP input and decrements the count value on the low-to-high transition of the DOWN input. This bi-directional counting feature provides flexibility for various counting and sequencing tasks.

• Carry and Borrow Outputs

The 74192 IC generates carry (CO) and borrow (BO) signals during its counting operation. CO goes low half a clock period before the counter reaches its maximum count (9 in decimal) during an up-count operation and returns to a high level at the zero count. BO functions similarly during a down-count operation. These outputs are essential for cascading multiple counters, allowing you to create multidigit counters with ease.

• Multidigit Counter Construction

One of the primary applications of the 74192 IC is in constructing multidigit counters. By connecting the CO output of a lower-order counter to the UP input of a higher-order counter and the BO output to the DOWN input, you can create counters with larger bit widths. This cascading capability enables you to count and sequence to higher values efficiently.

• Synchronous Operation

The 74192 operates synchronously, meaning that the counting and other operations are synchronized to a clock signal. This synchronous operation ensures that the counter behaves predictably and accurately, making it suitable for a wide range of digital applications.

74192 Pinout

74192 ic pin diagram/ 74192 ic pin configuration