CD74HC190E

Product Overview

• Category: Integrated Circuit
• Use: Counter/Divider
• Characteristics: High-speed, CMOS logic, synchronous operation
• Package: DIP (Dual In-line Package)
• Essence: 4-bit synchronous up/down binary counter
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage Range: 2V to 6V
• Operating Temperature Range: -55°C to +125°C
• Maximum Clock Frequency: 25 MHz
• Maximum Counting Range: 16 (2^4) states
• Output Drive Capability: 10 LSTTL Loads
• Propagation Delay: 13 ns (typical)

Pin Configuration

The CD74HC190E has a total of 16 pins. The pin configuration is as follows:

1. MR (Master Reset)
2. CPD (Count Down Clock Pulse)
3. CPUP (Count Up Clock Pulse)
4. ENT (Enable Parallel Load)
5. Q0 (Least Significant Bit)
6. Q1
7. Q2
8. Q3 (Most Significant Bit)
9. GND (Ground)
10. Q3' (Complement of Most Significant Bit)
11. Q2'
12. Q1'
13. Q0' (Complement of Least Significant Bit)
14. VCC (Positive Power Supply)
15. TC (Terminal Count)
16. RCO (Ripple Carry Output)

Functional Features

• Synchronous operation with separate count-up and count-down clock inputs
• Parallel load capability for presetting the counter
• Terminal count output for cascading multiple counters
• Ripple carry output for expanding the counting range
• High-speed operation suitable for various applications
• Low power consumption due to CMOS technology

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick counting and dividing tasks - Synchronous operation ensures accurate and reliable results - Low power consumption makes it suitable for battery-powered devices - Versatile functionality with parallel load, terminal count, and ripple carry outputs

Disadvantages: - Limited counting range of 16 states may not be sufficient for certain applications - DIP package may not be suitable for space-constrained designs - Requires external clock signals for proper operation

Working Principles

The CD74HC190E is a 4-bit synchronous up/down binary counter. It operates based on the clock pulses received at the CPUP (count up) and CPD (count down) inputs. The counter can be preset using the ENT (enable parallel load) input, allowing for a specific initial value. As the clock pulses are applied, the counter increments or decrements based on the selected count direction.

The TC (terminal count) output indicates when the counter reaches its maximum count value, providing a signal for cascading multiple counters. The RCO (ripple carry output) allows for expanding the counting range by connecting additional counters in series.

Detailed Application Field Plans

The CD74HC190E is widely used in various applications that require counting or dividing functions. Some common application fields include:

1. Digital frequency dividers
2. Event counters
3. Timekeeping circuits
4. Industrial automation systems
5. Electronic gaming devices
6. Traffic light control systems
7. Frequency synthesizers
8. Data communication equipment

Detailed and Complete Alternative Models

1. CD74HC191E: Similar to CD74HC190E but with additional asynchronous clear input.
2. CD40192BE: 4-bit synchronous up/down decade counter with parallel load capability.
3. SN74LS190N: 4-bit synchronous up/down binary counter with separate clock inputs.

These alternative models offer similar functionality and can be considered as replacements for the CD74HC190E depending on specific requirements.

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