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TTL MSI
TYPES SN54LS168A SNS4LS169A, SN54S168, SN54S169, SN74LS168A. SN74LS169A, SN74S168, SN74S169 SYNCHRONOUS 4 -B IT U P/DO W N COUNTERS
B U L L E T I N N O . D L -S 7 7 1 2 0 6 8 , O C T O B E