| Allicdata Part #: | 74F191PC-ND |
| Manufacturer Part#: |
74F191PC |
| Price: | $ 0.00 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | ON Semiconductor |
| Short Description: | IC COUNTER DECADE UP/DOWN 16-DIP |
| More Detail: | Counter IC Binary Counter 1 Element 4 Bit Positive... |
| DataSheet: |  74F191PC Datasheet/PDF |
| Quantity: | 1000 |
Specifications
| Timing: | Synchronous |
| Base Part Number: | 74F191 |
| Supplier Device Package: | 16-DIP |
| Package / Case: | 16-DIP (0.300", 7.62mm) |
| Mounting Type: | Through Hole |
| Operating Temperature: | 0°C ~ 70°C |
| Voltage - Supply: | 4.5V ~ 5.5V |
| Trigger Type: | Positive Edge |
| Count Rate: | 100MHz |
| Series: | 74F |
| Reset: | -- |
| Number of Bits per Element: | 4 |
| Number of Elements: | 1 |
| Direction: | Up, Down |
| Logic Type: | Binary Counter |
| Part Status: | Obsolete |
| Packaging: | Tube |
Description
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The 74F191PC is a programmable counter/divider and flip-flop chip. It is a member of the 74F191XXX family of high-speed, programmable counter/dividers. As a member of this family, it is well-suited for applications requiring high-speed binary division, product terms coding, or frequency division and timing generation.The basic function of the chip is to count pulses from a high-frequency source. The result of any high-speed counting operation is presented in a 16-bit synchronous parallel output. The 74F191PC also has a unique reset feature that allows the counter to be reset without regard to the count state.The chip is composed of a 16-bit counter, a 16-bit programmable-width register and flip-flop array. The counter is a 16-bit counter designed to count both binary and BCD codes. The count is initialized to all 1s or all 0s or to any specific count. The counter can be reset synchronously or asynchronously. The programmable width register, or PWA, is a 16-bit register coupled to the counter. It is used to define the number of least significant bits (LSBs) whose states will be latched in the flip-flop and drive the reset line. The PWA can be programmed in a variety of ways, including the number of bits to be latched or by setting the width of the counter. The flip-flop array is composed of four 16-bit D flip-flops. The first two serve as separate latches for the lower 16 bits; the third and fourth are used to latch the lower 8 bits in sequence. The flip-flop array outputs can be used with external logic for timing functions such as pulsewidth control and frequency division. The 74F191PC can be used in a wide range of applications where there is a need for counting, frequency division and timing. Some typical applications include clock frequency monitoring, modulo-N counters, code converters, frequency dividers, pulse width modulators and frequency synthesisers.In conclusion, the 74F191PC is a versatile and powerful counter/divider/flip-flop chip designed for use in high-speed counting and timing applications. Its ability to accept both binary or BCD codes, coupled with its reset approach and programmable width register allows for quick and easy implementation in most applications.
The specific data is subject to PDF, and the above content is for reference
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