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MC74AC299N bảng dữ liệu(PDF) 1 Page - ON Semiconductor |
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1 / 12 page © Semiconductor Components Industries, LLC, 2003 April, 2003 − Rev. 6 1 Publication Order Number: MC74AC299/D MC74AC299, MC74ACT299 8−Input Universal Shift/ Storage Register with Common Parallel I/O Pins The MC74AC299/74ACT299 is an 8−bit universal shift/storage register with 3−state outputs. Four modes of operation are possible: hold (store), shift left, shift right and load data. The parallel load inputs and flip−flop outputs are multiplexed to reduce the total number of package pins. Additional outputs are provided for flip−flops Q0, Q7 to allow easy serial cascading. A separate active LOW Master Reset is used to reset the register. • Common Parallel I/O for Reduced Pin Count • Additional Serial Inputs and Outputs for Expansion • Four Operating Modes: Shift Left, Shift Right, Load and Store • 3−State Outputs for Bus−Oriented Applications • Outputs Source/Sink 24 mA • ′ACT299 Has TTL Compatible Inputs Figure 1. Pinout: 20−Lead Packages Conductors (Top View) 19 20 18 17 16 15 14 2 1 3 4567 VCC 13 8 12 9 11 10 S1 DS7 Q7 I/O7 I/O5 I/O3 I/O1 CP DS0 S0 OE1 OE2 I/O6 I/O4 I/O2 I/O0 Q0 MR GND PIN ASSIGNMENT PIN FUNCTION CP Clock Pulse Input DS0 Serial Data Input for Right Shift DS7 Serial Data Input for Left Shift S0, S1 Mode Select Inputs MR Asynchronous Master Reset OE1, OE2 3−State Output Enable Inputs I/O0−I/O7 Parallel Data Inputs or 3−State Parallel Outputs Q0, Q7 Serial Outputs 1 20 PDIP−20 N SUFFIX CASE 738 1 20 SO−20 DW SUFFIX CASE 751 Device Package Shipping ORDERING INFORMATION MC74AC299N PDIP−20 18 Units/Rail MC74ACT299N PDIP−20 18 Units/Rail MC74AC299DW SOIC−20 38 Units/Rail MC74AC299DWR2 SOIC−20 1000 Tape & Reel MC74ACT299DW SOIC−20 38 Units/Rail MC74ACT299DWR2 SOIC−20 1000 Tape & Reel See general marking information in the device marking section on page 9 of this data sheet. DEVICE MARKING INFORMATION http://onsemi.com |
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Mô tả tương tự - MC74AC299N |
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