7483 (4-bit binary full adder with fast carry)

Description

The IC 7483 is a 4-bit binary adder from the 7400 series of TTL (Transistor-Transistor Logic) ICs. It is used to add two 4-bit binary numbers, with an additional carry-in and carry-out for multi-bit additions. It can also be used in arithmetic operations in digital systems.

IC 7483 Description:

The 7483 is a 4-bit binary full adder that takes in two 4-bit binary numbers (A3-A0 and B3-B0) and an optional carry-in input (C_in). The result is a 4-bit sum (S3-S0), along with a carry-out (C_out) which represents a carry to the next higher bit. The carry-in and carry-out pins allow the IC to be cascaded for adding multiple-bit binary numbers.

Key Features:

• 4-Bit Binary Adder: It adds two 4-bit binary numbers, outputting a 4-bit sum.
• Carry-In and Carry-Out: The carry-in (C_in) allows the adder to be used in multi-bit addition, and the carry-out (C_out) is used to propagate a carry bit to the next stage of addition.
• Fast Arithmetic Operation: This IC performs addition of binary numbers with minimal delay, thanks to its full-adder design.
• TTL Logic: As a TTL device, it operates with standard TTL voltage levels, making it compatible with other TTL logic ICs.

Pin Configuration (16-pin package):

Functional Description:

1. 4-Bit Binary Addition:
   • The 7483 adds two 4-bit binary numbers. Each input bit (A0 to A3, B0 to B3) is a binary digit, and the output consists of the sum of corresponding bits from both numbers along with a carry bit.
   • The adder performs bitwise addition using the full adder logic, which considers both the current bit and the carry bit from the previous bit addition.
2. Carry-In and Carry-Out:
   • The carry-in (C_in) is the bit carried over from a previous addition, and it is added to the first bit of the numbers A and B. This allows the 7483 to be used in cascading multiple ICs for adding larger numbers.
   • The carry-out (C_out) indicates whether a carry bit was generated during the addition of the most significant bits. If a carry-out occurs, it signals that the sum has exceeded the capacity of the current bit size (e.g., 4-bit), and a carry needs to be propagated to the next bit.
3. Sum Outputs:
   • The outputs S0, S1, S2, S3 represent the 4-bit sum of the two input numbers. Each sum output corresponds to the sum of the respective bits from A and B, along with the carry-in, if applicable.
4. TTL Logic Compatibility:
   • The IC is built with TTL logic and uses standard TTL voltage levels, which makes it compatible with other TTL ICs in the 7400 series. It typically operates with a 5V supply voltage and provides outputs that are within TTL logic levels.

Applications:

1. Binary Addition:
   • The 7483 is used to add two 4-bit binary numbers. It is commonly found in arithmetic circuits for digital systems that require binary addition.
2. Multi-Bit Arithmetic Operations:
   • By cascading multiple 7483 ICs, you can add numbers with more than 4 bits, such as 8-bit, 16-bit, or larger binary numbers. The carry-out from one IC can be used as the carry-in for the next IC in the chain.
3. ALU (Arithmetic Logic Unit):
   • The 7483 is used in ALUs (Arithmetic Logic Units) as part of digital computers or processors to perform arithmetic operations, such as addition, subtraction, and other mathematical operations.
4. Digital Calculators:
   • In digital calculators, the 7483 can be used to handle basic arithmetic functions, especially for adding numbers.
5. Binary Counter Systems:
   • It is also useful in systems where addition is part of the counting mechanism, for example, in digital counters or clocks.
6. Signal Processing:
   • The 7483 can be used in signal processing applications where binary numbers are manipulated, added, or processed.

Electrical Characteristics:

• Supply Voltage (Vcc): Typically 5V (operates from 4.75V to 5.25V).
• Input Voltage (Vih/Vil): The input voltage levels for TTL logic are:
  • Vih (High Input): Typically 2V.
  • Vil (Low Input): Typically 0.8V.
• Output Voltage (Voh/Vol): The output voltage levels for TTL logic are:
  • Voh (High Output): Typically 2V to 5V.
  • Vol (Low Output): Typically 0V.
• Power Consumption: The IC typically consumes a small amount of power in typical TTL operation.