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74VHCT74A Arkusz danych(PDF) 1 Page - Fairchild Semiconductor |
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74VHCT74A Arkusz danych(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page July 1997 Revised April 1999 © 1999 Fairchild Semiconductor Corporation DS500026.prf www.fairchildsemi.com 74VHCT74A Dual D-Type Flip-Flop with Preset and Clear General Description The VHCT74A is an advanced high speed CMOS Dual D- Type Flip-Flop fabricated with silicon gate CMOS technol- ogy. It achieves the high speed operation similar to equiva- lent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The signal level applied to the D INPUT is transferred to the Q OUTPUT during the positive going transition of the CK pulse. CLR and PR are independent of the CK and are accomplished by setting the appropriate input LOW. Protection circuits ensure that 0V to 7V can be applied to the input pins without regard to the supply voltage and to the output pins with VCC = 0V. These circuits prevent device destruction due to mismatched supply and input/ output voltages. This device can be used to interface 3V to 5V systems and two supply systems such as battery backup. Features s High speed: fMAX = 160 MHz (typ) at TA = 25°C s High noise immunity: VIH = 2.0V, VIL = 0.8V s Power down protection is provided on all inputs and outputs s Low power dissipation: ICC = 2 µA (max) at TA = 25°C s Pin and function compatible with 74HCT74 Ordering Code: Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol IEEE/IEC Pin Descriptions Connection Diagram Truth Table Order Number Package Number Package Description 74VHCT74AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 74VHCT74ASJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHCT74AMTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74VHCT74AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Pin Names Description D1, D2 Data Inputs CK1, CK2 Clock Pulse Inputs CLR1, CLR2 Direct Clear Inputs PR1, PR2 Direct Preset Inputs Q1, Q1, Q2, Q2 Outputs Inputs Outputs Function CLR PR DCK Q Q L H X X L H Clear HL X X H L Preset LL X X H H HH L LH HH H HL HH X Qn Qn No Change |
Podobny numer części - 74VHCT74A_99 |
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Podobny opis - 74VHCT74A_99 |
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