SN74ALS520N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The SN74ALS520N is an 8-bit identity comparator (P=Q) from Texas Instruments with enable input and 20 kΩ Q-input pull-up resistors, based on the ALS logic family. It compares two 8-bit words and outputs a match signal, supports cascading for wider word widths, and drives a 50 pF load at 24 mA. Housed in a 20-pin DIP package, this device is ideal for data validation and address comparison in digital systems.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74ALS520N Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0875(MOQ 5)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74ALS520N?
- 8-bit identity comparator (P=Q) with active-high match output
- 20 kΩ built-in pull-up resistors on Q inputs for direct open-collector bus interfacing
- Cascadable output enable for multi-device 16-bit or wider word comparisons
- ALS (Advanced Low-power Schottky) logic family for reduced power consumption
- 24 mA output drive current with 50 pF load capacity
- 20-pin DIP through-hole package for breadboard and prototype use
What is SN74ALS520N used for?
The SN74ALS520N is used in digital system design for address decoding, data integrity verification, and memory content comparison circuits. Its cascadable enable input allows construction of wider-word comparators for microprocessor bus validation and security key matching in industrial control and communications equipment.
What are the specifications of SN74ALS520N?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | WITH PULL-UP RESISTORS ON Q INPUTS; CASCADABLE |
| Family | ALS |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | IDENTITY COMPARATOR |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 19mA |
| Prop. Delay@Nom-Sup | 20ns |
| Propagation Delay (tpd) | 20ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Where can I find the SN74ALS520N datasheet?
SN74ALS520N Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74ALS520N?
Compatible alternatives and drop-in replacements for SN74ALS520N:
SN74ALS520 8-Bit Identity Comparators (P=Q) with Enable and 20K Ohm Q-Input Pullup Resistors
Frequently Asked Questions
What function does the SN74ALS520N perform?
The SN74ALS520N is an 8-bit identity comparator that determines if two 8-bit input words (P and Q) are equal. It outputs a logic high when all 8 bit pairs match, enabling direct bus address or data value comparison.
What are the built-in pull-up resistors used for in the SN74ALS520N?
The SN74ALS520N includes 20 kΩ pull-up resistors on the Q inputs, allowing them to be driven directly from open-collector bus lines without external pull-up components, simplifying bus interface circuit design.
Can the SN74ALS520N be cascaded for wider comparisons?
Yes, the SN74ALS520N features an enable input that allows multiple devices to be cascaded for comparing 16-bit, 32-bit, or wider data words by connecting the output enable of one device to control the next in the chain.
What package does the SN74ALS520N come in?
The SN74ALS520N is packaged in a 20-pin plastic dual-in-line (PDIP) through-hole package, which is well-suited for prototype breadboarding, legacy board repair, and production designs using wave soldering processes.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 5+ | $3.9720 | $19.86 |
| 100+ | $3.2900 | $329.00 |
| 115+ | $2.6100 | $300.15 |
| 1000+ | $2.2250 | $2225.00 |
| 2500+ | $2.1600 | $5400.00 |
| 10000+ | $2.0875 | $20875.00 |
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