SN74HC684NE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments SN74HC684NE4 is an 8-bit magnitude comparator in DIP-20 package with A=B and A>B outputs, 50 pF load capacitance, and HC/UH family speed. From $0.50 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74HC684NE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HC684NE4?
- 8-bit magnitude comparison with dedicated A=B and A>B output signals for direct inequality detection
- HC/UH logic family with 50 pF load capacitance for fast switching in 5V digital systems
- DIP-20 through-hole package for easy breadboard prototyping and legacy board designs
- Single-function comparator with low output sink current of 5.2 mA for bus-compatible interfacing
What is SN74HC684NE4 used for?
The SN74HC684NE4 is used in digital systems where two 8-bit data words must be compared in hardware, such as address decoding in embedded processors, priority arbitration logic, and memory bank selection circuits. Its dual A=B and A>B outputs allow cascaded comparison chains or branching decision logic without additional glue logic gates. The through-hole DIP-20 package makes it straightforward to integrate into prototype boards and legacy industrial control systems still using through-hole assembly.
What are the specifications of SN74HC684NE4?
| YTEOL | 0 |
| Additional Feature | WITH A=B AND A > B OUTPUTS |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | MAGNITUDE COMPARATOR |
| Max I(ol) | 0.0052A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| 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) | 0.08mA |
| Prop. Delay@Nom-Sup | 58ns |
| Propagation Delay (tpd) | 344ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| 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) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the SN74HC684NE4 datasheet?
SN74HC684NE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HC684NE4?
Compatible alternatives and drop-in replacements for SN74HC684NE4:
Frequently Asked Questions
What does SN74HC684NE4 compare, and what output signals does it provide?
The SN74HC684NE4 performs an 8-bit magnitude comparison between two input words and provides two output signals: A=B indicating the inputs are equal, and A>B indicating the first input is greater. These outputs enable downstream logic to branch based on numerical inequality, supporting address decoding, sorting networks, and control sequencing in 5V HC-family digital systems.
What is the load capacitance specification of SN74HC684NE4 and what does it mean for system timing?
The SN74HC684NE4 is rated for a 50 pF load capacitance. This parameter determines the output switching speed under realistic PCB trace and gate loading conditions; staying at or below 50 pF ensures the device meets its HC-family propagation delay specifications, which is important when cascading multiple comparator stages or driving longer PCB traces in high-speed 8-bit comparison logic.
Is SN74HC684NE4 suitable for new designs, and what does YTEOL 0 indicate about its lifecycle?
A YTEOL value of 0 signals that SN74HC684NE4 is approaching or has reached the end of its defined product lifecycle, meaning Microchip or TI may have limited remaining production runs. Designers starting new projects should evaluate equivalent 8-bit magnitude comparators in active production, while existing users maintaining legacy boards can still source available stock from distributors worldwide.
Can SN74HC684NE4 be cascaded to compare word widths greater than 8 bits?
Yes, SN74HC684NE4 can be cascaded with additional comparator stages to extend comparison beyond 8 bits. The A>B and A=B outputs from the least-significant stage feed into enable or cascading inputs of more-significant stages, allowing 16-bit, 24-bit, or wider comparisons while maintaining HC-family logic levels and the 50 pF load capacitance constraint per output stage.
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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.
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