器件名称:
MC74AC299
功能描述:
8-Input Universal Shift/ Storage Register with Common Parallel I/O Pins
文件大小:
117.15KB 共12页
简 介:
MC74AC299, MC74ACT299 8Input Universal Shift/ Storage Register with Common Parallel I/O Pins The MC74AC299/74ACT299 is an 8bit universal shift/storage register with 3state outputs. Four modes of operation are possible: hold (store), shift left, shift right and load data. The parallel load inputs and flipflop outputs are multiplexed to reduce the total number of package pins. Additional outputs are provided for flipflops Q0, Q7 to allow easy serial cascading. A separate active LOW Master Reset is used to reset the register. http://onsemi.com PDIP20 N SUFFIX CASE 738 20 1 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 3State Outputs for BusOriented Applications Outputs Source/Sink 24 mA ′ACT299 Has TTL Compatible Inputs VCC 20 S1 19 DS7 18 Q7 17 I/O7 16 I/O5 15 I/O3 14 I/O1 13 CP 12 DS0 11 20 1 SO20 DW SUFFIX CASE 751 ORDERING INFORMATION Device MC74AC299N MC74ACT299N MC74AC299DW Package PDIP20 PDIP20 SOIC20 SOIC20 SOIC20 SOIC20 Shipping 18 Units/Rail 18 Units/Rail 38 Units/Rail 1000 Tape & Reel 38 Units/Rail 1000 Tape & Reel 1 S0 2 OE1 3 OE2 4 I/O6 5 I/O4 6 I/O2 7 I/O0 8 Q0 9 MR 10 GND MC74AC299DWR2 MC74ACT299DW MC74ACT299DWR2 Figure 1. Pinout: 20Lead Packages Conductors (Top View) DEVICE MARKING INFORMATION PIN ASSIGNMENT PIN CP DS0 DS7 S0, S1 MR OE1, OE2 I/O0I/O7 Q 0 , Q7 FUNCTION Clock Pulse Input Serial Data Input for Right Shift Serial Data ……
