SN74AS161DRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Counter
• Characteristics: High-speed, synchronous, 4-bit binary counter
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: A digital circuit that counts from 0 to 15 and provides outputs for each count
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Logic Family: AS (Advanced Schottky)
• Number of Bits: 4
• Clock Frequency: Up to 25 MHz
• Output Drive Capability: 10 LSTTL Loads
• Propagation Delay: 9 ns (typical)

Detailed Pin Configuration

The SN74AS161DRG4 has a total of 16 pins. The pin configuration is as follows:

1. CLK (Clock Input)
2. MR (Master Reset Input)
3. CPD (Count Enable Parallel Input)
4. P0 (Parallel Data Input Bit 0)
5. P1 (Parallel Data Input Bit 1)
6. P2 (Parallel Data Input Bit 2)
7. P3 (Parallel Data Input Bit 3)
8. Q0 (Serial Data Output Bit 0)
9. Q1 (Serial Data Output Bit 1)
10. Q2 (Serial Data Output Bit 2)
11. Q3 (Serial Data Output Bit 3)
12. GND (Ground)
13. NC (No Connection)
14. VCC (Positive Power Supply)
15. TC (Terminal Count Output)
16. CE (Count Enable Input)

Functional Features

• Synchronous operation with a common clock input (CLK)
• Asynchronous master reset (MR) for clearing the counter to 0
• Count enable parallel input (CPD) for loading data in parallel
• Terminal count output (TC) indicates when the counter reaches its maximum value (15)
• Count enable input (CE) for enabling or disabling counting

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick counting - Synchronous design ensures accurate and reliable counting - Small package size (SOIC) makes it suitable for space-constrained applications - Wide supply voltage range provides flexibility in different power supply environments

Disadvantages: - Limited to 4-bit counting, not suitable for applications requiring larger counters - Requires an external clock signal for operation - May be more expensive compared to simpler counter ICs with fewer features

Working Principles

The SN74AS161DRG4 is a synchronous 4-bit binary counter. It counts from 0 to 15 and provides outputs for each count. The counter advances on each rising edge of the clock input (CLK). The count can be cleared to 0 by applying a low-level signal to the master reset input (MR). Data can be loaded into the counter in parallel through the count enable parallel input (CPD). The terminal count output (TC) goes high when the counter reaches its maximum value (15).

Detailed Application Field Plans

The SN74AS161DRG4 can be used in various applications that require counting functionality, such as:

1. Digital frequency dividers
2. Event counters
3. Time delay generators
4. Industrial automation systems
5. Traffic light control systems
6. Electronic gaming devices
7. Frequency synthesizers
8. Pulse generation circuits

Detailed and Complete Alternative Models

1. SN74LS161: Similar 4-bit synchronous binary counter with slightly different specifications.
2. CD40161B: CMOS version of the 4-bit synchronous binary counter.
3. MC14060B: 14-stage ripple carry binary counter with similar functionality.

These alternative models offer similar counting capabilities but may have different characteristics, package types, or supply voltage ranges. It is important to select the appropriate model based on specific application requirements.

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