
Overview
The SN74LS684N is a digital Comparator made by Texas Instruments in a PDIP-20 package with 20 pins. 0℃~+70℃ 24mA 30ns@5V,45pF 4.85V~5.25V 400uA 8 A=B,A>B Active Low Hysteresis comparison PDIP-20 Digital Comparators ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:SN54LS682J, from EasyEDA) and its footprint (Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1523714).
Symbol
Footprint
Parameters
9- Current - Output High(IOH)
- 400uA
- Current - Output Low(IOL)
- 24mA
- Features
- Hysteresis comparison
- Number of Channels
- 8
- Operating Temperature
- 0℃~+70℃
- Output
- Active Low
- Output Function
- A=B,A>B
- Propagation Delay
- 30ns@5V,45pF
- Voltage - Supply
- 4.85V~5.25V
Order codes
1- SN74LS684NLCSC C1523714
Pinout
20| Pin | Name | Type |
|---|---|---|
| 1 | P>Q# | Unspecified |
| 2 | P0 | Unspecified |
| 3 | Q0 | Unspecified |
| 4 | P1 | Unspecified |
| 5 | Q1 | Unspecified |
| 6 | P2 | Unspecified |
| 7 | Q2 | Unspecified |
| 8 | P3 | Unspecified |
| 9 | Q3 | Unspecified |
| 10 | GND | Unspecified |
| 11 | P4 | Unspecified |
| 12 | Q4 | Unspecified |
| 13 | P5 | Unspecified |
| 14 | Q5 | Unspecified |
| 15 | P6 | Unspecified |
| 16 | Q6 | Unspecified |
| 17 | P7 | Unspecified |
| 18 | Q7 | Unspecified |
| 19 | P=Q# | Unspecified |
| 20 | VCC | Unspecified |
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Is there a KiCad symbol and footprint for the SN74LS684N?
Yes. The symbol is EasyEDA_Cloud:SN54LS682J and the footprint Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the SN74LS684N?
PDIP-20, with 20 pins. Its footprint is drawn on this page.
Where is the SN74LS684N datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the SN74LS684N?
JLCPCB lists it as part C1523714, with 0 in stock; the sellers' links on this page open their listings.
What can replace the SN74LS684N?
Parts like it in the library: the SN74LS688N by Texas Instruments, the SN74HC682N by Texas Instruments, the DM74ALS520N by onsemi and the 74HC688P-E by Renesas Electronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.
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