SN74ALS520DW Texas Instruments logic-gates (SOIC-20) In Stock
SN74ALS520DW is an 8-bit identity comparator with ALS technology and output enable, SOIC-20. From $1.47 at 205+pcs. In stock, ships globally.
- Manufacturer
- Texas Instruments
- Package
- SOIC-20
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74ALS520DW Datasheet PDF
- Category
- logic-gates
- Price
- From $1.0716(MOQ 1)
- Temp Range
- 0.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit parallel identity comparison in single clock cycle
- Output enable for bus-connected applications
- Advanced Low-Power Schottky for speed-power balance
- Active-low output indicates word match
- Wide supply: 4.5V to 5.5V TTL compatible
Applications
Used in address decoding, pattern matching, memory bank selection, and hardware comparator circuits. Common in legacy bus architectures, PLDs, and digital systems requiring fast parallel word comparison.
Specifications
| Comparison Width | 8bit |
| Supply Voltage | 4.5-5.5V |
| Propagation Delay | 12ns |
| Output Type | Tri-state, active-LOW |
| Supply Current | 22mA |
| Logic Family | ALS |
| Input Type | TTL compatible |
| Output Enable | Yes |
| Package | SOIC-20 |
Compliance & Regulatory
| RoHS Status | Compliant |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ALS520DW:
Frequently Asked Questions
How does SN74ALS520 compare two words?
The SN74ALS520 simultaneously compares two 8-bit input words (P0-P7 and Q0-Q7). When all 8 bit pairs match, the active-low output (P=Q) goes LOW. Any single bit mismatch drives the output HIGH. Comparison is combinational with no clock required.
What is the propagation delay of SN74ALS520?
Typical propagation delay from input change to output is 12ns, making it suitable for high-speed address decoding. The ALS technology provides a good balance between the faster but power-hungry AS series and the slower LS series.
Does SN74ALS520 have an output enable?
Yes, the output enable (OE) input allows the output to be placed in a high-impedance state, enabling direct connection to shared buses. When OE is inactive (HIGH), the output is tri-stated regardless of input comparison results.
What are common applications for 8-bit comparators?
8-bit comparators like SN74ALS520 are used for address decoding (comparing bus address with target address), data matching in hardware lookup tables, DIP switch setting comparison, and bus arbitration where exact word matching is needed.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.3120 | $3.31 |
| 12+ | $1.6560 | $19.87 |
| 33+ | $1.2365 | $40.80 |
| 103+ | $1.1541 | $118.87 |
| 218+ | $1.0716 | $233.61 |
In Stock · 24h Response · Worldwide Shipping
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