PI74VCX16244AE

PI74VCX16244 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 16-Bit Buffer/Driver with 3-State Outputs Features Description • The PI74VCX Family is designed for low voltage operation, CD = 1.8V to 3.6V • 3.6V Tolerant Inputs and Outputs • Supports Live Insertion • Balanced Drive, ±24mA • Uses patented Noise Reduction Circuitry • Typical VOLP (Output Ground Bounce) < 0.6V at VDD = 2.5V, TA = 25ºC • Typical VOHV (Output VOH Undershoot) < –0.6V at VDD = 2.5V, TA = 25ºC • Power-Off high impedance inputs and outputs • Industrial operation at –40°C to +85°C • Packaging (Pb-free & Green available): – 48-pin 240-mil wide plastic TSSOP (A) Pericom Semiconductor’s PI74VCX16244 buffer/driver is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The device can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. It provides true outputs and symmetrical active-low output-enable (OE) inputs. 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. The PI74VCX family is I/O Tolerant, allowing it to operate in 1.8/3.6V systems. Block Diagram 1OE 1A1 1A2 1A3 1A4 2OE 2A1 2A2 2A3 2A4 08-0291 1 3OE 47 2 46 3 44 5 43 6 1Y1 3A1 1Y2 3A2 1Y3 3A3 1Y4 3A4 48 4OE 41 8 40 9 38 11 37 12 2Y1 4A1 2Y2 4A2 2Y3 4A3 2Y4 4A4 1 25 36 13 35 14 33 16 32 17 3 Y1 3 Y2 3 Y3 3 Y4 24 30 19 29 20 27 22 26 23 4 Y1 4 Y2 4 Y3 4 Y4 PS8160E 11/10/08 PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Truth Table(1) Pin Description Pin Name nOE nAx nYx GND VCC Inputs Description 3-State Output Enable Inputs (Active LOW) Inputs 3-State Outputs Ground Power 1 48 1Y 1 2 47 1Y 2 3 46 1A 2 GND 4 45 GND 1Y 3 5 44 1A 3 1Y 4 6 43 1A 4 VCC 7 42 VCC 2Y 1 8 41 2A 1 2Y 2 9 40 2A 2 GND 10 39 GND 2Y 3 11 38 2A 3 2Y 4 12 37 2A 4 3Y 1 13 36 3A 1 3Y 2 14 35 3A 2 GND 15 34 GND 3Y 3 16 33 3A 3 nAX nYx L H H L L L H X Z 2OE 1A 1 3Y 4 17 32 3A 4 VCC 18 31 VCC 4Y 1 19 30 4A 1 4Y 2 20 29 4A 2 GND 21 28 GND 08-0291 nOE Notes: 1. H = High Signal Level L = Low Signal Level X = Don’t Care or Irrelevant Z = High Impedance Pin Configuration 1OE Outputs 4Y 3 22 27 4A 3 4Y 4 23 26 4A 4 4OE 24 25 3OE 2 PS8160E 11/10/08 PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Supply Voltage Range, VDD ........................................... 0.5V to 4.6V Input Voltage Range, VI ............................................... -0.5V to 4.6V Output Voltage Range, VO (3-Stated) ........................... -0.5V to 4.6V Output Voltage Range, VO(1) (Active) ..................... -0.5V to VCC+0.5 DC Input Diode Current (IIK) VI