SN54HCT04 SN54HCT244-SP SN54HCT04-SP SN54HCT14 SN54HCT245-SP SN54HCT238 SN54HCT138 SN54HCT240 SN54HCT244 SN54HCT245 SN54HCT373 SN54HCT373-SP SN54HCT374 SN54HCT540 SN54HCT541 SN54HCT74