SN74AS109AN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: Dual J-K Positive-Edge-Triggered Flip-Flop
• Package: DIP-16 (Dual In-Line Package with 16 pins)
• Essence: Sequential Logic Device
• Packaging/Quantity: Tube, 25 pieces per tube

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2.0V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Voltage: 2.4V (min)
• Low-Level Output Voltage: 0.4V (max)
• Maximum Operating Frequency: 100MHz
• Propagation Delay Time: 15ns (typical)

Detailed Pin Configuration

The SN74AS109AN has a total of 16 pins, which are assigned specific functions as follows:

1. CLR (Clear) - Active LOW clear input
2. CLK (Clock) - Positive-edge-triggered clock input
3. J (Data Input J) - J input for the first flip-flop
4. K (Data Input K) - K input for the first flip-flop
5. Q (Output Q) - Output Q for the first flip-flop
6. Q̅ (Complementary Output Q) - Complementary output Q for the first flip-flop
7. GND (Ground) - Ground reference
8. Q̅ (Complementary Output Q) - Complementary output Q for the second flip-flop
9. Q (Output Q) - Output Q for the second flip-flop
10. K (Data Input K) - K input for the second flip-flop
11. J (Data Input J) - J input for the second flip-flop
12. VCC (Positive Power Supply) - Positive power supply voltage
13. Q̅ (Complementary Output Q) - Complementary output Q for the third flip-flop
14. Q (Output Q) - Output Q for the third flip-flop
15. K (Data Input K) - K input for the third flip-flop
16. J (Data Input J) - J input for the third flip-flop

Functional Features

• Dual J-K positive-edge-triggered flip-flop with clear functionality
• Can be used as a synchronous binary counter or for general-purpose storage applications
• Provides separate clock inputs for each flip-flop, allowing independent operation
• Clear input allows resetting the flip-flops to a known state
• High-speed operation with low power consumption
• TTL-compatible inputs and outputs

Advantages and Disadvantages

Advantages: - Versatile functionality suitable for various digital logic applications - Independent clock inputs enable flexible operation - Clear input ensures reliable initialization - High-speed operation allows for efficient data processing - Compatible with TTL logic levels

Disadvantages: - Limited maximum operating frequency compared to some modern ICs - DIP package may not be suitable for space-constrained designs - Requires external components for complete circuit implementation

Working Principles

The SN74AS109AN is a dual J-K positive-edge-triggered flip-flop. It consists of two individual flip-flops, each with J and K inputs, a clock input, and complementary outputs (Q and Q̅). The flip-flops are triggered on the rising edge of the clock signal.

The J and K inputs determine the behavior of the flip-flops. When both J and K inputs are LOW, the flip-flop holds its previous state. When J is HIGH and K is LOW, the flip-flop sets its output to HIGH. Conversely, when J is LOW and K is HIGH, the flip-flop resets its output to LOW. When both J and K inputs are HIGH, the flip-flop toggles its output on each clock pulse.

The clear input (CLR) allows resetting the flip-flops to a known state when activated. This ensures reliable initialization of the circuit.

Detailed Application Field Plans

The SN74AS109AN can be used in various digital logic applications, including but not limited to:

1. Synchronous binary counters
2. Frequency dividers
3. Shift registers
4. State machines
5. Data storage elements

Its versatility and independent clock inputs make it suitable for designs requiring multiple flip-flops with different clocking requirements.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74AS109AN include:

1. CD4013BE - Dual D-Type Flip-Flop
2. 74HC109 - Dual J-K Flip-Flop
3. MC14013B - Dual Type "D" Flip-Flop

These alternatives may have slightly different specifications or