DM7490AN

Product Overview

• Category: Integrated Circuit
• Use: Digital Logic
• Characteristics: Counter/Divider
• Package: DIP (Dual In-line Package)
• Essence: Binary Coded Decimal Counter
• Packaging/Quantity: 1 piece per package

Specifications

• Supply Voltage: 5V
• Logic Family: TTL (Transistor-Transistor Logic)
• Number of Pins: 14
• Operating Temperature Range: -55°C to +125°C
• Maximum Clock Frequency: 30 MHz
• Counting Sequence: Asynchronous

Detailed Pin Configuration

1. CLK (Clock Input)
2. GND (Ground)
3. QD (Output QD)
4. QA (Output QA)
5. QB (Output QB)
6. QC (Output QC)
7. MR (Master Reset)
8. VCC (Supply Voltage)
9. QD (Output QD)
10. QE (Output QE)
11. QF (Output QF)
12. QG (Output QG)
13. QH (Output QH)
14. NC (No Connection)

Functional Features

• DM7490AN is a synchronous, presettable binary coded decimal counter.
• It can count up or down depending on the input signals.
• The counter can be reset to a specific value using the Master Reset (MR) pin.
• It has separate clock inputs for counting up and counting down.
• The outputs represent the BCD code of the current count.

Advantages and Disadvantages

Advantages: - Versatile counter with both up and down counting capabilities. - Presettable feature allows setting the initial count value. - Suitable for various digital logic applications. - Wide operating temperature range.

Disadvantages: - Limited maximum clock frequency compared to some modern ICs. - Requires external components for proper operation.

Working Principles

• DM7490AN operates based on the principles of synchronous digital logic.
• The counter increments or decrements its count value based on the clock inputs.
• The Master Reset (MR) pin allows resetting the counter to a specific value.
• The outputs represent the BCD code of the current count.

Detailed Application Field Plans

DM7490AN can be used in various applications, including:

1. Frequency Dividers: It can divide an input frequency by a specific factor.
2. Digital Counters: It can be used as a general-purpose digital counter.
3. Timekeeping Circuits: It can be utilized in timekeeping applications.
4. Industrial Control Systems: It can be integrated into control systems for counting and timing purposes.

Detailed and Complete Alternative Models

Some alternative models to DM7490AN include:

1. SN74LS90N: Similar functionality with improved specifications.
2. CD4017BE: Decade counter with 10 outputs.
3. MC14553B: Programmable BCD counter with multiplexed 7-segment outputs.
4. 74HC191: Synchronous up/down binary counter.

(Note: This is not an exhaustive list; there are several other alternatives available in the market.)

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