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| 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 1 2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74ALVCH162827 20-Bit Buffer Driver with 3-STATE Outputs Product Features * * * * * * * * * PI74ALVCH162827 is 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 = 25C Typical VOHV (Output VOH Undershoot) < 2.0V at VCC = 3.3V, TA = 25C Output ports have equivalent 26 series resistors; no external resistors are required Bus Hold retains last active bus state during 3-STATE, eliminating the need for external pullup resistors Industrial operation at 40C to +85C Packages available: 56-pin 240 mil wide plastic TSSOP (A) 56-pin 300 mil wide plastic SSOP (V) Product Description Pericom Semiconductors PI74ALVCH series of logic circuits are produced in the Companys advanced 0.5 micron CMOS technology, achieving industry leading speed. The PI74ALVCH162827 is a 20-bit non-inverting buffer/driver designed for 2.3V to 3.6V VCC operation. The buffer/driver is composed of two 10-bit sections with separate output-enable signals. For either 10-bit buffer section, the two output-enable (1OE1 and 1OE2 or 2OE1 and 2OE2) inputs must both be low for the corresponding Y outputs to be active. If either output-enable input is HIGH, the outputs of that 10-bit buffer section are in the high-impedance state. The outputs, which are designed to sink up to 12mA, include 26 resistors to reduce overshoot and undershoot. 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 PI74ALVCH162827 has Bus Hold which retains the data inputs last state whenever the data input goes to high-impedance preventing floating inputs and eliminating the need for pullup/ down resistors. Logic Block Diagram 1OE1 1OE2 1 56 2OE1 2OE2 28 29 1A1 55 2 1Y1 2A1 42 15 2Y1 To 9 Other Channels To 9 Other Channels 1 PS8095B 10/07/98 Product Pin Description Pin Name OE Ax Yx GND VCC Description Output Enable Input (Active LOW) Data Inputs 3-State Outputs Ground Power 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74ALVCH162827 20-Bit Buffer Driver with 3-STATE Outputs Truth Table(1) Inputs OE1 L L H X OE2 L L X H A L H X X Outputs Y L H Z Z Product Pin Configuration Notes: 1. H = High Signal Level L = Low Signal Level X = Don't Care or Irrelevant Z = High Impedance 1OE1 1Y1 1Y2 GND 1Y3 1Y4 VCC 1Y5 1Y6 1Y7 GND 1Y8 1Y9 1Y10 2Y1 2Y2 2Y3 GND 2Y4 2Y5 2Y6 VCC 2Y7 2Y8 GND 2Y9 2Y10 2OE1 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 56-PIN 50 V56 49 1OE2 1A1 1A2 GND 1A3 1A4 VCC 1A5 1A6 1A7 GND 1A8 1A9 1A10 2A1 2A2 2A3 GND 2A4 2A5 2A6 VCC 2A7 2A8 GND 2A9 2A10 2OE2 A56 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 2 PS8095B 10/07/98 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74ALVCH162827 20-Bit Buffer Driver with 3-STATE Outputs Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................ 65C to +150C Ambient Temperature with Power Applied .......................... 40C to +85C Input Voltage Range, VIN .................................................... 0.5V to VCC +4.6V Output Voltage Range, VOUT ............................................. 0.5V to VCC +0.5V DC Input Voltage ................................................................... 0.5V to +5.0V DC Output Current ................................................................................ 50 mA Power Dissipation ................................................................................... 1.0W 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. DC Electrical Characteristics (Over the Operating Range, TA = 40C to +85C, VCC = 3.3V 10%) Parame te rs VCC VIH(3) VIL(3) VIN(3) VOUT(3) D e s cription Supply Voltage Input HIGH Voltage VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V 0 0 IOH = - 100mA, VCC = Min. to Max. O utput HIGH Voltage VIH = 1.7V, IOH = - 4mA, VCC = 2.3V VIH = 1.7V, IOH = - 6mA, VCC = 2.3V VIH = 2.0V, IOH = - 6mA, VCC = 2.7V VIH = 2.0V, IOH = - 8mA, VCC = 3.0V VIH = 2.0V, IOH = - 12mA, VCC = 3.0V IOL = 100mA, VIL = Min. to Max. VOL O utput LO W Voltage VIL = 0.7V, IOL = 4mA, VCC = 2.3V VIL = 0.7V, IOL = 6mA, VCC = 2.3V VIL = 0.8V, IOL = 6mA, VCC = 2.7V VIL = 0.8V, IOL = 12mA, VCC = 3.0V O utput HIGH Current VCC = 2.3V VCC = 2.7V VCC = 3.0V VCC = 2.3V VCC = 2.7V VCC = 3.0V 3 Te s t Conditions (1) M in. 2.3 1.7 2.0 Typ.(2) M ax. 3.6 Units Input LO W Voltage Input Voltage O utput Voltage 0.7 0.8 VCC VCC VCC - 0.2 1.9 1.7 2.4 2.0 2.0 0.2 0.4 0.55 0.55 0.8 -6 -8 - 12 6 8 12 PS8095B 10/07/98 V VOH IOH(3) mA IOL(3) O utput LO W Current 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74ALVCH162827 20-Bit Buffer Driver with 3-STATE Outputs M in. Typ.(2) M ax. 5 45 - 45 75 - 75 500 10 40 750 3.5 6 7 pF mA Units DC Electrical Characteristics-Continued (Over the Operating Range, TA = 40C to +85C, VCC = 3.3V 10%) Parame te rs De s cription IIN Input Current Te s t Conditions (1) VIN = VCC or GND, VCC = 3.6V VIN = 0.7V, VCC = 2.3V IIN (HOLD) Input Hold Current VIN = 1.7V, VCC = 2.3V VIN = 0.8V, VCC = 3.0V VIN = 2.0V, VCC = 3.0V VIN = 0 to 3.6V, VCC = 3.6V IOZ ICC DICC Output Current (3- STATE Outputs) Supply Current Supply Current per Input @ TTL HIGH Control Inputs Data Inputs Outputs VOUT = VCC or GND, VCC = 3.6V VCC = 3.6V, IOUT = 0mA, VIN = GND or VCC VCC = 3.0V to 3.6V One Input at VCC - 0.6V Other Inputs at VCC or GND VIN = VCC or GND, VCC = 3.3V VO = VCC or GND, VCC = 3.3V CI CO 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, +25C 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 tPD tEN tDIS Dt/Dv(3) From (INPUT) A OE OE D e s cription Input Transition Rise or Fall 0 10 0 10 0 10 ns/V Notes: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Recommended operating condition. To (OUTPUT) Y Y Y VCC = 2.5V 0.2V M in.(2) 1.3 1.5 2.4 M ax. 4.4 7.2 5.9 VCC = 2.7V M in.(2) M ax. 4.4 6.2 5.2 VCC = 3.3V 0.3V M in.(2) 1.5 1.6 1.8 M ax. 3.8 5.2 4.7 Units ns Operating Characteristics, TA = 25C Parame te r CPD Power Dissipation Capacitance Outputs Enabled Outputs Disabled Te s t Conditions VCC = 2.5V 0.2V Typ. 16 4 18 6 VCC = 3.3V 0.3V Units CL = 50pF, f = 10 MHz pF Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com 4 PS8095B 10/07/98 |
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