2 layers100 × 77.5 mm
Overview
The 74LS21PC is a logic Gate made by onsemi in a DIP-14 package with 5 pins. 0℃~+70℃ 18ns@5V,50pF 2 2.7V~3.4V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA AND Gate DIP-14 Logic Gates ROHS.
PCBKit's library has its footprint (Package_DIP:DIP-14_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C4470831). 40 open-source boards in 34 repositories on GitHub use it.
Symbol
The library has no symbol for this part yet.
Footprint
Order codes
1- 74LS21PCLCSC C4470831
Open-source boards using it
All 40- 4 layers239.4 × 165.7 mm
- 4 layers340 × 210 mm
- 2 layers83.1 × 74.4 mm
MSXIOSlot
jedimatt42/MSXIOSlot
PCBoard design for an MSX expansion slot adapter to 1 full expansion slot + 1 IO Slot.
14 parts11Unlicense - 4 layers99.9 × 100 mm
- 2 layers281 × 79 mm
- 2 layers
- 2 layers190 × 125 mm
68hc11
mggates39/68hc11_SBC
Building a Single Board Computer around the MC68HC11. It will include my first attempt with KiCad designing a PCB
58 parts4GPL-3.0
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<iframe src="https://pcbkit.io/embed/parts/onsemi/74LS21PC" title="74LS21PC in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/74LS21PC.jpg" alt="74LS21PC" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/74LS21PC)Questions
Is there a KiCad symbol and footprint for the 74LS21PC?
Yes. the footprint Package_DIP:DIP-14_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 74LS21PC?
DIP-14, with 5 pins. Its footprint is drawn on this page.
Where is the 74LS21PC datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the 74LS21PC?
JLCPCB lists it as part C4470831, with 0 in stock; the sellers' links on this page open their listings.
What can replace the 74LS21PC?
Parts like it in the library: the CD4093BE by Texas Instruments, the CD4078BE by HGSEMI, the CD4093BE(XBLW) by XBLW and the CD4030BE by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the 74LS21PC?
40 boards in 34 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
CD4093BE
PDIP-14-55℃~+125℃ 130ns@15V,50pF 2 3.4mA 3.4mA 3.6V~10.8V 3V~18V 4 4.95V~5V、9.95V~10V、14.95V~15V 4000B Series 4uA 50mV NAND Gate DIP-14 Logic Gates ROHSTexas InstrumentsLogic GatesCD4078BE
DIP-14-40℃~+85℃ 1 1.5V、3V、4V 110ns@15V,50pF 3.5V、7V、11V 4.95V、9.95V、14.95V 4000 Series 50mV 5V~18V 5uA 6.8mA 6.8mA 8 NOR Gate、OR Gate DIP-14 Logic Gates ROHSHGSEMILogic GatesCD4093BE(XBLW)
DIP-14-40℃~+85℃ 10V 2 2.6mA 3V~15V 4 4uA 50mV 6.8mA 90ns CD4 NAND Gate Schmitt trigger DIP-14 Logic Gates ROHSXBLWLogic GatesCD4030BE
PDIP-14-55℃~+125℃ 1.5V~4V 100ns@15V,50pF 1uA 3.4mA 3.4mA 3.5V~11V 3V~18V 4 4000B Series XOR Gate PDIP-14 Logic Gates ROHSTexas InstrumentsLogic GatesSN74LS20N(LX)
DIP-14-40℃~+105℃ 1.5V~4.2V 15ns@6V,50pF 2 2V~6V 2uA 500mV~1.8V 74LS Series NAND Gate DIP-14 Logic Gates ROHSlingxingicLogic GatesCD4082BE(XBLW)
DIP-14-40℃~+105℃ 2 2.6mA 3.5V、7V、11V 3V 3V~15V 4 500nA 50mV 5V 6.8mA 60ns AND Gate CD4 DIP-14 Logic Gates ROHSXBLWLogic GatesSN74LS21N(XBLW)
DIP-14-20℃~+85℃ 1.5V、3.15V、4.2V 1.9V、3.98V、5.48V 100mV、330mV、330mV 19ns@6V,50pF 2 20uA 2V~6V 4 5.2mA 5.2mA 500mV、1.35V、1.8V 74LS AND Gate DIP-14 Logic Gates ROHSXBLWLogic GatesSN74HC13N(LX)
DIP-14-40℃~+125℃ 1.9V~5.34V 100mV~330mV 12ns@6V,50pF 2 20uA 2V~6V 4 4mA 4mA 74 Series NAND Gate DIP-14 Logic Gates ROHSlingxingicLogic Gates