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SN54LS191  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
厂商: TI[Texas Instruments] 查看供应商
SN54LS191FK  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
厂商: TI[Texas Instruments] 查看供应商
SN54LS191J  SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
厂商: TI[Texas Instruments] 查看供应商
DM54LS191  Synchronous 4-Bit Up/Down Counters with Mode Control
厂商: NSC[National Semiconductor] 查看供应商
DM54LS191J  Synchronous 4-Bit Up/Down Counters with Mode Control
厂商: NSC[National Semiconductor] 查看供应商
DM54LS191W  Synchronous 4-Bit Up/Down Counters with Mode Control
厂商: NSC[National Semiconductor] 查看供应商

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