PI74ALVCH16244 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 16-Bit Buffer Driver with 3-State Outputs Features Description • • • • Pericom Semiconductor’s PI74ALVCH16244 is an non-inverting 16-bit buffer/driver designed for low-voltage 2.3V to 3.6V VCC operation. • • • • Designed for low-voltage operation VCC = 2.3V to 3.6V Hysteresis on all inputs Typical VOLP (Output Ground Bounce) < 0.8V at VCC = 3.3V, TA = 25°C Typical VOHV (Output VOH Undershoot) < 2.0V at VCC = 3.3V, TA = 25°C Bus Hold retains last active bus state during 3-State, eliminating the need for external pullup resistors Industrial operation at –40°C to +85°C Packaging: – 48-pin 240-mil wide plastic TSSOP (A) The 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 non-inverting 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 in which the minimum value is determined by the current-sinking capability of the driver. The PI74ALVCH16244 has “Bus Hold” which retains the data input’s last state whenever the data input goes to high-impedance preventing “floating” inputs and eliminating the need for pullup/ down resistors. Block Diagram 1OE 1 1A1 47 2 1A2 46 3 1A3 44 5 1A4 43 6 2OE 48 2A1 41 8 2A2 40 9 2A3 38 11 2A4 37 12 1Y1 3OE 25 3A1 36 1Y2 3A2 35 14 1Y3 3A3 33 16 1Y4 3A4 32 17 2Y1 4OE 24 4A1 30 19 2Y2 4A2 29 20 2Y3 4A3 27 22 2Y4 4A4 26 23 1 13 3Y1 3Y2 3Y3 3Y4 4Y1 4Y2 4Y3 4Y4 PS8087C 10/05/04 PI74ALVCH16244 16-Bit Buffer Driver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Pin Description Truth Table(1) Pin Name De s cription nOE 3- State Output Enable Inputs (Active LOW) nAx Inputs nYx 3- State Outputs GND Ground VCC Power Inputs Outputs nOE nAx nYx L H H L L L H X Z Notes: 1. H = High Signal Level L = Low Signal Level X = Don't Care or Irrelevant Z = High Impedance Pin Configuration 1OE 1 48 2OE 1Y1 2 47 1A1 1Y2 3 46 1A2 GND 4 45 GND 1Y3 5 44 1A3 1Y4 6 43 1A4 VCC 7 42 2Y1 8 41 VCC 2A1 2Y2 9 40 2A2 GND 10 39 GND 2Y3 11 38 2A3 2Y4 12 37 2A4 3Y1 13 36 3A1 3Y2 14 35 3A2 GND 15 34 GND 3Y3 16 33 3A3 3Y4 VCC 4Y1 17 32 18 31 3A4 VCC 19 30 4A1 4Y2 20 29 4A2 GND 21 28 GND 4Y3 22 27 4A3 4Y4 23 26 4A4 4OE 24 25 3OE 2 PS8087C 10/05/04 PI74ALVCH16244 16-Bit Buffer Driver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .............................................................. –65°C to +150°C Ambient Temperature with Power Applied ........................... –40°C to +85°C Input Voltage Range, VIN ......................................................... –0.5V to VCC +0.5V Output Voltage Range, VOUT .................................................. –0.5V to VCC +0.5V DC Input Voltage ...................................................................... –0.5V to +5.0V DC Output Current ............................................................................... 100mA Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Power Dissipation ..................................................................................... 1.0W DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%) Parame te rs De s cription VCC Supply Voltage VIH(3) Input HIGH Voltage VIL(3) Input LOW Voltage VIN (3) VOUT(3) VOH VOL IOH(3) IOL(3) Te s t Conditions (1) M in. 2.3 VCC = 2.3V to 2.7V 1. 7 VCC = 2.7V to 3.6V 2.0 Typ.(2) M ax. 3.6 VCC = 2.3V to 2.7V 0.7 VCC = 2.7V to 3.6V 0.8 Input Voltage 0 VCC Output Voltage 0 VCC Output HIGH Voltage Output LOW Voltage Output HIGH Current Output LOW Current IOH = –100µA, VCC = Min. to Max. VCC - 0.2 VIH = 1.7V, IOH = –6mA, VCC = 2.3V 2.0 VIH = 1.7V, IOH = –12mA, VCC = 2.3V 1.7 VIH = 2.0V, IOH = –12mA, VCC = 2.7V 2.2 VIH = 2.0V, IOH = –12mA, VCC = 3.0V 2.4 VIH = 2.0V, IOH = –24mA, VCC = 3.0V 2.0 V IOL = 100µA, VIL = Min. to Max. 0.2 VIL = 0.7V, IOL = 6mA, VCC = 2.3V 0.4 VIL = 0.7V, IOL = 12mA, VCC = 2.3V 0.7 VIL = 0.8V, IOL = 12mA, VCC = 2.7V 0.4 VIL = 0.8V, IOL = 24mA, VCC = 3.0V 0.55 VCC = 2.3V –12 VCC = 2.7V –12 VCC = 3.0V –24 VCC = 2.3V 12 VCC = 2.7V 12 VCC = 3.0V 24 3 Units PS8087C mA 10/05/04 PI74ALVCH16244 16-Bit Buffer Driver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 DC Electrical Characteristics-Continued (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%) Parame te rs De s cription IIN Input Current Te s t Conditions (1) Typ.(2) M ax. VIN = VCC or GND, VCC = 3.6V Input Hold Current IIN (HOLD) M in. ±5 VIN = 0.7V, VCC = 2.3V 45 VIN = 1.7V, VCC = 2.3V –4 5 VIN = 0.8V, VCC = 3.0V 75 VIN = 2.0V, VCC = 3.0V –75 VIN = 0 to 3.6V, VCC = 3.6V ± 500 IOZ Output Current (3- State Outputs) VOUT = VCC or GND, VCC = 3.6V ±10 ICC Supply Current VCC = 3.6V, IOUT = 0µA, VIN = GND or VCC 40 ∆ICC Supply Current per Input @ TTL HIGH VCC = 3.0V to 3.6V One Input at VCC - 0.6V Other Inputs at VCC or GND 750 CI Control Inputs Outputs CO µA 3 VIN = VCC or GND, VCC = 3.3V Data Inputs Units 6 VO = VCC or GND, VCC = 3.3V pF 7 Notes: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, +25°C ambient and maximum loading. 3. Unused Control Inputs must be held HIGH or LOW to prevent them from floating. Switching Characteristics over Operating Range(1) Parame te rs From (Input) To (Output) tPD A tEN tDIS VCC = 2.5V ± 0.2V M in.(2) M ax. Y 1.0 OE Y OE Y VCC = 2.7V M in.(2) VCC = 3.3V ± 0.3V M ax. M in.(2) M ax. 3.7 3.6 1.0 3.0 1.0 5.7 5.4 1.0 4.4 1.0 5.2 4.6 1.0 4.1 0 10 10 0 10 Units ns Description ∆t/∆v(3) Input Transition Rise or Fall 0 ns/V Notes: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Recommended operating condition. Operating Characteristics, TA = 25ºC Parame te r CPD Power Dissipation Capacitance Te s t Conditions Outputs Enabled Outputs Disabled C L = 50pF f = 10 MHz 4 VCC = 2.5V ± 0.2V VCC = 3.3V ± 0.3V Typical 16 19 4 5 Units pF PS8087C 10/05/04 PI74ALVCH16244 16-Bit Buffer Driver with 3-State Outputs 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical 48-pin TSSOP (A) 48 .236 .244 1 6.0 6.2 .488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE .004 0.09 .008 0.20 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS .0197 BSC 0.50 0.45 .018 0.75 .030 .002 .006 0.05 0.15 .007 .010 0.17 0.27 .319 BSC 8.1 Ordering Information Ordering Code PI74ALVCH16244A Package Code A Package Type 48-pin TSSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 5 PS8087C 10/05/04