SN74LS190N

SN74LS191D

計數器 IC 4-Bit Sync Up/Down

SN74LS191DE4

計數器 IC 4-Bit Sync Up/Down

SN74LS191DG4

計數器 IC Sync 4B Up Down Counters

SN74LS191DR

計數器 IC 4-Bit Sync Up/Down

SN74LS191DRE4

計數器 IC 4-Bit Sync Up/Down

SN74LS191DRG4

計數器 IC Sync 4B Up Down Counters

SN74LS191J

SN74LS191N

計數器 IC 4-Bit Sync Up/Down

SN74LS191NE4

計數器 IC 4-Bit Sync Up/Down

SN74LS191NSR

計數器 IC 4-Bit Sync Up/Down

SN74LS191NSRE4

計數器 IC 4-Bit Sync Up/Down