产品比较：M74HC688B1R
- M74HC688B1R L4949E L4947H
- M74HC688B1R L4945 ST2L05R3325PS
- M74HC688B1R ST2L05R3318PT ST2L05R3300PT
- M74HC688B1R ST2L05R3300K5 ST2L05R2500PT
- M74HC688B1R ST2L05R1825PT ST2L05R1800PT
- M74HC688B1R ST2L05-3325PT ST2L05-3300PT
- M74HC688B1R ST2L05-3300K5 ST2L05-2500PT
- M74HC688B1R ST2L05-1825PT ST2L05-1800PT
- M74HC688B1R ST2L05-1500PT ST2L01PTR
- M74HC688B1R ST2L01K5 LD3985G25R
- M74HC688B1R LD3985G18R LP2994M/NOPB
- M74HC688B1R LM2614BTL LM2614ATL/NOPB
- M74HC688B1R LP2975IMMX-3.3 LP2975IMMX-12
- M74HC688B1R LP2975AIMMX-3.3 LP2975AIMMX-12
- M74HC688B1R LM2685MTCX/NOPB LP2975IMM-12/NOPB
- M74HC688B1R LP2975AIMM-12/NOPB LM2685MTC/NOPB
- M74HC688B1R 2954989 2942454
- M74HC688B1R LD2985BM15R LD2985AM50R
- M74HC688B1R LD2985AM33R LD2985AM15R
- M74HC688B1R LD2982BM50R LD2982BM33R
- M74HC688B1R LD2982AM50R LD2982AM33R
- M74HC688B1R LD2982AM25R LM723CD
- M74HC688B1R LM350K LM338K
- M74HC688B1R LM323K LM317D2T
- M74HC688B1R LF33CDT LD1117DT33
- M74HC688B1R L7905CD2T L78M05CDT
- M74HC688B1R L78L06ACZ L78L05ACD
- M74HC688B1R L7812CD2T L7805CD2T
- M74HC688B1R L387A ST2L01K5R
- M74HC688B1R LM723CD013TR LM2931AV50
- M74HC688B1R LF85CDT LF80ABDT
- M74HC688B1R LF50ABDT LE40CZ
- M74HC688B1R LE30CZ LD2981ABU18TR
- M74HC688B1R LD2981ABM18TR LD2980ABM18TR
- M74HC688B1R LD29300V80 LD29300V33
- M74HC688B1R LD29300V25 LD29300V18
- M74HC688B1R LD29300D2T33R LD29300D2T15R
- M74HC688B1R LD29300D2M33R LD29300D2M15R
- M74HC688B1R LD29150V80 LD29150PT25R
- M74HC688B1R LD29150DT15R L4931CV50
- M74HC688B1R L4931CV33 LD1117DT30
- M74HC688B1R LD1117D50 LD1117D33
- M74HC688B1R LD1117D25 LD1117D18
- M74HC688B1R LD1117AV18 L7924CV
- M74HC688B1R L7918CV L7906CV
- M74HC688B1R L78M18ABDT L78M06CV
- M74HC688B1R L7824CD2T L7820CV
- M74HC688B1R L7818ABV L7812CP
- M74HC688B1R L7805ACD2T L4947PD
- M74HC688B1R L4940V12 L4931ABV50
- M74HC688B1R L4931ABV33 L4931ABV25
