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厂商:
SN74LS191  
厂商: TI 查看供应商
74LS191D  PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS
厂商: MOTOROLA 查看供应商
SN74LS191  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
厂商: TI[Texas Instruments] 查看供应商
DM74LS191  Synchronous 4-Bit Up/Down Counter with Mode Control
厂商: FAIRCHILD[Fairchild Semiconductor] 查看供应商
DM74LS191M  Synchronous 4-Bit Up/Down Counter with Mode Control
厂商: FAIRCHILD[Fairchild Semiconductor] 查看供应商
DM74LS191N  Synchronous 4-Bit Up/Down Counter with Mode Control
厂商: FAIRCHILD[Fairchild Semiconductor] 查看供应商
SN74LS191D  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
厂商: TI[Texas Instruments] 查看供应商
SN74LS191N  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
厂商: TI[Texas Instruments] 查看供应商
74LS191  Synchronous Up/Down 4-bit Binary Counters(single clock line)
厂商: HITACHI[Hitachi Semiconductor] 查看供应商
HD74LS191  Synchronous Up/Down 4-bit Binary Counters(single clock line)
厂商: HITACHI[Hitachi Semiconductor] 查看供应商

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