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MC74ACT161DG Datasheet(PDF) 1 Page - ON Semiconductor |
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MC74ACT161DG Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 12 page © Semiconductor Components Industries, LLC, 2015 January, 2015 − Rev. 8 1 Publication Order Number: MC74AC161/D MC74AC161, MC74ACT161, MC74AC163, MC74ACT163 Synchronous Presettable Binary Counter The MC74AC161/74ACT161 and MC74AC163/74ACT163 are high−speed synchronous modulo−16 binary counters. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters. The MC74AC161/74ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW. The MC74AC163/74ACT163 has a Synchronous Reset input that overrides counting and parallel loading and allows the outputs to be simultaneously reset on the rising edge of the clock. Features • Synchronous Counting and Loading • High−Speed Synchronous Expansion • Typical Count Rate of 125 MHz • Outputs Source/Sink 24 mA • ′ACT161 and ′ACT163 Have TTL Compatible Inputs • These are Pb−Free Devices 15 16 14 13 12 11 10 2 1 3 4 567 VCC 9 8 TC Q0 Q1 Q2 Q3 CET PE *R CP P0 P1 P2 P3 CEP GND Figure 1. Pinout: 16−Lead Packages Conductors (Top View) PIN ASSIGNMENT PIN FUNCTION CEP Count Enable Parallel Input CET Count Enable Trickle Input CP Clock Pulse Input MR ( ′161) Asynchronous Master Reset Input SR ( ′163) Synchronous Reset Input P0−P3 Parallel Data Inputs PE Parallel Enable Input Q0−Q3 Flip−Flop Outputs TC Terminal Count Output www.onsemi.com See detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ORDERING INFORMATION SOIC−16 D SUFFIX CASE 751B 1 16 MARKING DIAGRAM xxx = AC or ACT y = 1 or 3 A = Assembly Location WL = Wafer Lot Y = Year WW = Work Week G = Pb−Free Package 1 16 xxx16yG AWLYWW |
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