Overview
The SN74AS21D is a logic Gate made by Texas Instruments in a SOIC-14 package with 14 pins. 0℃~+70℃ 2 20mA 2V 2mA 4 4.5V~5.5V 6ns@5V,50pF 74AS Series 800mV AND Gate SOIC-14 Logic Gates ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:SN74LS21N(XBLW), from EasyEDA) and its footprint (Package_SO:SOIC-14_3.9x8.7mm_P1.27mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C4469902).
Symbol
Footprint
Parameters
12- Current - Output High(IOH)
- 2mA
- Current - Output Low(IOL)
- 20mA
- Input Logic Level - High
- 2V
- Input Logic Level - Low
- 800mV
- Input Number
- 4
- Logic Type
- AND Gate
- Number of Channels
- 2
- Operating Temperature
- 0℃~+70℃
- Output Logic Level - Low
- 500mV
- Propagation Delay
- 6ns@5V,50pF
- Series
- 74AS Series
- Voltage - Supply
- 4.5V~5.5V
Order codes
1- SN74AS21DLCSC C4469902
Pinout
14| Pin | Name | Type |
|---|---|---|
| 1 | 1A | Unspecified |
| 2 | 1B | Unspecified |
| 3 | NC | Unspecified |
| 4 | 1C | Unspecified |
| 5 | 1D | Unspecified |
| 6 | 1Y | Unspecified |
| 7 | GND | Unspecified |
| 8 | 2Y | Unspecified |
| 9 | 2A | Unspecified |
| 10 | 2B | Unspecified |
| 11 | NC | Unspecified |
| 12 | 2C | Unspecified |
| 13 | 2D | Unspecified |
| 14 | VCC | Unspecified |
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Is there a KiCad symbol and footprint for the SN74AS21D?
Yes. The symbol is EasyEDA_Cloud:SN74LS21N(XBLW) and the footprint Package_SO:SOIC-14_3.9x8.7mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the SN74AS21D?
SOIC-14, with 14 pins. Its footprint is drawn on this page.
Where is the SN74AS21D datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the SN74AS21D?
JLCPCB lists it as part C4469902, with 0 in stock; the sellers' links on this page open their listings.
What can replace the SN74AS21D?
Parts like it in the library: the CD4093BM96 by Texas Instruments, the CD4078BM96 by Texas Instruments, the SN74LS21D by Texas Instruments and the CD4030BM96 by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Parts like it
8
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SOIC-14-55℃~+125℃ 1uA 2 3.6V~10.8V 3V~18V 4 4.95V~5V、9.95V~10V、14.95V~15V 4000B Series 50mV 8.8mA 8.8mA 80ns@15V,50pF 900mV~4V NAND Gate SOIC-14 Logic Gates ROHSonsemiLogic Gates