That's the TSSOP version, while the DIP is $0.92: https://www.digikey.com/en/products/detail/microchip-technology/47L04-I-P/6236462 https://www.digikey.com/en/

That's the TSSOP version, while the DIP is $0.92: https://www.digikey.com/en/products/detail/microchip-technology/47L04-I-P/6236462 https://www.digikey.com/en/products/detail/microchip-technol... I'd prefer even the SOIC version which is $0.69 if I'm soldering it: https://www.digikey.com/en/products/detail/microchip-technology/47L04-I-SN/6236463 https://www.digikey.com/en/products/detail/microchip-technol... but the author used the DIP in a holder/socket on the perfboard.