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SN54LS490

Part Number	SN54LS490
Manufacturer	Motorola Inc
Description	DUAL DECADE COUNTER
Published	Apr 16, 2005
Detailed Description	SN54/74LS490 DUAL DECADE COUNTER The SN54 / 74LS490 contains a pair of high-speed 4-stage ripple counters. Each half of ...
Datasheet	SN54LS490 PDF File

Overview

SN54/74LS490 DUAL DECADE COUNTER The SN54 / 74LS490 contains a pair of high-speed 4-stage ripple counters.
Each half of the SN54 / 74LS490 has individual Clock, Master Reset and Master Set (Preset 9) inputs.
Each section counts in the 8, 4, 2, 1 BCD code.
• • • • Dual Version of SN54 / 74LS490 Individual Asynchronous Clear and Preset to 9 for Each Counter Count Frequency — Typically 65 MHz Input Clamp Diodes Limit High-Speed Termination Effects DUAL DECADE COUNTER LOW POWER SCHOTTKY CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 CPb 15 MRb 14 Q0b 13 MSb 12 Q1b 11 Q2b 10 Q3b 9 16 1 J SUFFIX CERAMIC CASE 620-09 1 CPa 2 MRa 3 Q0a 4 MSa 5 Q1a 6 Q2a 7 Q3a 8 GND 16 1 N SUFFIX PLASTIC CASE ...

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