Overview
The CD74HCT221EX is a monostable Multivibrator made by Texas Instruments in a PDIP-16 package with 16 pins. -55℃~+125℃ 18ns 2 4.5V~5.5V 4mA 4mA 74HCT Monostable Schmitt trigger PDIP-16 Monostable Multivibrators.
PCBKit's library has its KiCad symbol (74xx:74LS221, from KiCad's library) and its footprint (Package_DIP:DIP-16_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C3231696).
Symbol
Footprint
Order codes
1- CD74HCT221EXLCSC C3231696
Pinout
16| Pin | Name | Type |
|---|---|---|
| 1 | A | Input |
| 2 | B | Input |
| 3 | CLR | Input |
| 4 | Q | Output |
| 5 | Q | Output |
| 6 | Cext | Input |
| 7 | RCext | Input |
| 8 | GND | Power in |
| 9 | A | Input |
| 10 | B | Input |
| 11 | CLR | Input |
| 12 | Q | Output |
| 13 | Q | Output |
| 14 | Cext | Input |
| 15 | RCext | Input |
| 16 | VCC | Power in |
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Is there a KiCad symbol and footprint for the CD74HCT221EX?
Yes. The symbol is 74xx:74LS221 and the footprint Package_DIP:DIP-16_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 CD74HCT221EX?
PDIP-16, with 16 pins. Its footprint is drawn on this page.
Where is the CD74HCT221EX datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the CD74HCT221EX?
JLCPCB lists it as part C3231696, with 0 in stock; the sellers' links on this page open their listings.
What can replace the CD74HCT221EX?
Parts like it in the library: the CD14538BE by Texas Instruments, the SN74HC123N(LX) by lingxingic, the SN74HC123N(XBLW) by XBLW and the CD74HC221E by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
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