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74ALVCH162721GRE4 датащи(PDF) 1 Page - Texas Instruments |
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74ALVCH162721GRE4 датащи(HTML) 1 Page - Texas Instruments |
1 / 14 page www.ti.com FEATURES DESCRIPTION DGG OR DL PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 OE Q1 Q2 GND Q3 Q4 VCC Q5 Q6 Q7 GND Q8 Q9 Q10 Q11 Q12 Q13 GND Q14 Q15 Q16 VCC Q17 Q18 GND Q19 Q20 NC CLK D1 D2 GND D3 D4 VCC D5 D6 D7 GND D8 D9 D10 D11 D12 D13 GND D14 D15 D16 VCC D17 D18 GND D19 D20 CLKEN NC − No internal connection SN74ALVCH162721 3.3-V 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS SCES055G – DECEMBER 1995 – REVISED SEPTEMBER 2004 • Member of the Texas Instruments Widebus™ Family • EPIC™ (Enhanced-Performance Implanted CMOS) Submicron Process • Output Ports Have Equivalent 26- Ω Series Resistors, So No External Resistors Are Required • ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) • Latch-Up Performance Exceeds 250 mA Per JESD 17 • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors • Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages NOTE: For tape-and-reel order entry, the DGGR package is abbreviated to GR. This 20-bit flip-flop is designed for low-voltage 1.65-V to 3.6-V VCC operation. The 20 flip-flops of the SN74ALVCH162721 are edge-triggered D-type flip-flops with qualified clock storage. On the positive transition of the clock (CLK) input, the device provides true data at the Q outputs if the clock-enable (CLKEN) input is low. If CLKEN is high, no data is stored. A buffered output-enable (OE) input places the 20 outputs in either a normal logic state (high or low level) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. The outputs, which are designed to sink up to 12 mA, include equivalent 26- Ω resistors to reduce overshoot and undershoot. The SN74ALVCH162721 is characterized for operation from -40 °C to 85°C. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Widebus, EPIC are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 1995–2004, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Аналогичный номер детали - 74ALVCH162721GRE4 |
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Аналогичное описание - 74ALVCH162721GRE4 |
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