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SN74LS283N

4-bit binary full adder, fast carry, LS TTL, PDIP-16

3000

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制造商零件：

SN74LS283N

包装：

PDIP-16 (19.3 x 6.35 x 4.57mm, 2.54mm pitch, through-hole)

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说明

产品概览

The SN74LS283N from Texas Instruments is a 4-bit binary full adder with fast carry, performing 4-bit addition in a single 24ns cycle in a 16-pin PDIP package.

主要规格

功能 4-bit binary full adder with fast carry
逻辑家族 LS (Low-power Schottky)
电源电压 4.75V to 5.25V (5V nominal)
Addition Time 24ns typical (16-bit using 4 cascaded chips)
工作温度 0°C to +70°C
包装 PDIP-16 (19.3 x 6.35mm)

特点

  • 4-bit parallel addition in one IC
  • Internal fast carry lookahead
  • Cascadable for wider additions
  • C0 input for multi-byte arithmetic
  • C4 output for carry propagation

应用

  • Arithmetic logic unit (ALU)
  • Address calculation
  • Digital signal processing
  • Binary counter/multiplier building block

The SN74LS283N from Texas Instruments is a 4-bit binary full adder that adds two 4-bit numbers (A0-A3 and B0-B3) plus a carry-in (C0) and produces a 4-bit sum (Σ0-Σ3) plus a carry-out (C4). The internal fast carry lookahead generates the C4 output without waiting for the carry to ripple through all four stages, making the 4-bit addition time only 24ns. For wider additions, the C4 output of one 74283 connects to the C0 input of the next, creating an 8-bit adder with two chips, or a 16-bit adder with four chips. The 74283 is the building block of arithmetic logic units (ALUs) in simple processors and digital signal processing systems. The N suffix denotes the PDIP-16 through-hole package.

The SN74LS283N adds A[3:0] + B[3:0] + C0 and outputs Σ[3:0] + C4. Internally, it uses carry lookahead logic: instead of computing each bit’s carry sequentially (ripple carry), it generates all carries simultaneously using the generate (G) and propagate (P) signals. Gi = Ai AND Bi (stage i generates a carry); Pi = Ai XOR Bi (stage i propagates an incoming carry). The carry at each stage is: Ci+1 = Gi OR (Pi AND Ci). For a 4-bit adder: C1 = G0 + P0·C0, C2 = G1 + P1·G0 + P1·P0·C0, C3 = G2 + P2·G1 + P2·P1·G0 + P2·P1·P0·C0, C4 = G3 + P3·G2 + P3·P2·G1 + P3·P2·P1·G0 + P3·P2·P1·P0·C0. This reduces the carry propagation from 4 gate delays (ripple) to 2 gate delays (lookahead), enabling the 24ns total addition time. The sum at each bit is: Σi = Pi XOR Ci. For subtraction (A−B), complement B and add 1 (set C0=1): A − B = A + NOT(B) + 1.

针脚 名称 类型 说明
1 C0 输入 Carry input (from lower-order adder or 0/1)
2 Σ1 输出 Sum bit 1 (2^1)
3 A1 输入 Input A bit 1
4 B1 输入 Input B bit 1
5 A2 输入 Input A bit 2
6 B2 输入 Input B bit 2
7 VCC 电源 Supply (5V)
8 Σ3 输出 Sum bit 3 (2^3)
9 Σ4 输出 Sum bit 4 (2^4, or C4 in some pinouts)
10 A4 输入 Input A bit 4 (MSB)
11 B4 输入 Input B bit 4 (MSB)
12 Σ2 输出 Sum bit 2 (2^2)
13 A3 输入 Input A bit 3
14 B3 输入 Input B bit 3
15 Σ0 输出 Sum bit 0 (LSB)
16 接地 电源 地面
  • 4-Bit Adder: Two 4-bit inputs A[3:0] and B[3:0]; C0=0; output Σ[3:0] + C4; 0+0=0 to 15+15=30 (C4=1, Σ=14)
  • 8-Bit Adder: Two 74283 chips; low chip C4 → high chip C0; adds 8-bit numbers in ~50ns
  • Subtractor: A − B: connect B inputs through inverters (74LS04); set C0=1; result = A + NOT(B) + 1 = A − B
  • Incrementer: Set B=0001 and C0=0; result = A + 1; useful for program counters
模型 制造商 主要区别 包装 Supply
74LS283N TI/Nexperia Original TTL version with 5V-only supply, typical propagation delay 10-15ns DIP-16 5V TTL
74LS283D TI/Nexperia Surface-mount SOIC version of LS with identical logic function SOIC-16 5V TTL
74HC283D TI/Nexperia CMOS version with wide 2-6V supply range, lower power consumption and higher noise immunity SOIC-16 2-6V CMOS
74HC283N TI/Nexperia Through-hole DIP version of HC family for prototyping and repair DIP-16 2-6V CMOS
74HCT283D TI/Nexperia CMOS with TTL-compatible input levels, ideal for mixing with LS devices at 5V SOIC-16 4.5-5.5V TTL-in
74HCT283N TI/Nexperia Through-hole DIP version of HCT family for prototyping and repair DIP-16 4.5-5.5V TTL-in

The 74283 is a 4-Bit Binary Full Adder. Family variants span from the original LS TTL (5V only) to modern LVC/AUP (down to 0.8V). HC and HCT versions offer 2-6V CMOS operation with HCT providing TTL-compatible input thresholds for mixed 5V systems. CD4000-series equivalents offer the widest 3-18V supply range at the cost of lower switching speed. DIP packages (N suffix) are through-hole; SOIC (D suffix) and TSSOP are surface-mount.

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Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

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We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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