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CD74FCT821AEN Fiches technique(PDF) 1 Page - Texas Instruments |
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CD74FCT821AEN Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 7 page 8-1 Data sheet acquired from Harris Semiconductor SCHS264 Features • Buffered Inputs • Typical Propagation Delay: 7.5ns at VCC = 5V, TA = 25 oC, C L = 50pF • CD74FCT821A - Noninverting • CD74FCT822A - Inverting • SCR Latchup Resistant BiCMOS Process and Circuit Design • Speed of Bipolar FAST™/AS/S • 48mA Output Sink Current • Output Voltage Swing Limited to 3.7V at VCC = 5V • Controlled Output Edge Rates • Input/Output Isolation to VCC • BiCMOS Technology with Low Quiescent Power Description The CD74FCT821A and CD74FCT822A ten bit, D-Type, three-state, positive edge triggered flip-flops use a small geometry BiCMOS technology. The output stage is a combi- nation of bipolar and CMOS transistors that limits the output HIGH level to two diode drops below VCC. This resultant lowering of output swing (0V to 3.7V) reduces power bus ringing (a source of EMI) and minimizes VCC bounce and ground bounce and their effects during simultaneous output switching. The output configuration also enhances switching speed and is capable of sinking 48 milliamperes. The ten flip-flops enter data into their registers on the LOW to HIGH transition of the clock(CP). The Output Enable (OE) controls the three state outputs and is independent of the register operation. When the Output Enable (OE) is HIGH, the outputs are in the high impedance state. The CD74FCT821A and CD74FCT822A share the same config- urations, but the CD74FCT821A outputs are noninverted while the CD74FCT822A devices have inverted outputs. Ordering Information Pinouts PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD74FCT821AEN 0 to 70 24 Ld PDIP E24.3 CD74FCT822AEN 0 to 70 24 Ld PDIP E24.3 CD74FCT821AM 0 to 70 24 Ld SOIC M24.3 NOTE: When ordering the suffix M packages, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel. CD74FCT821A (PDIP, SOIC) TOP VIEW CD74FCT822A (PDIP, SOIC) TOP VIEW 1 2 3 4 5 6 7 8 9 10 11 12 OE D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 GND 16 17 18 19 20 21 22 23 24 15 14 13 VCC Q1 Q2 Q3 Q4 Q6 Q8 Q9 CP Q0 Q5 Q7 1 2 3 4 5 6 7 8 9 10 11 12 16 17 18 19 20 21 22 23 24 15 14 13 OE D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 GND VCC Q1 Q2 Q3 Q4 Q6 Q8 Q9 CP Q0 Q5 Q7 January 1997 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. FAST™ is a trademark of Fairchild Semiconductor. Copyright © Harris Corporation 1997 CD74FCT821A, CD74FCT822A BiCMOS FCT Interface Logic, 10- Bit D-Type Flip-Flops, Three-State File Number 2390.2 NOT RECOMMENDED FOR NEW DESIGNS Use CMOS Technology |
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Description similaire - CD74FCT821AEN |
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