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PI74ALVCH162244
16-Bit Buffer Driver with 3-STATE Outputs
Product Features
* * * * * * * * * PI74ALVCH162244 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: 48-pin 240 mil wide plastic TSSOP (A) 48-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 PI74ALVCH162244 is an non-inverting 16-bit buffer/driver designed for low voltage 2.3V to 3.6V VCC operation. 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 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 PI74ALVCH162244 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
1OE
3OE
1A0
1Y0
3A0
3Y0
1A1
1Y1
3A1
3Y1
1A2
1Y2
3A2
3Y2
1A3
1Y3
3A3
3Y3
2OE
4OE
2A0
2Y0
4A0
4Y0
2A1
2Y1
4A1
4Y1
2A2
2Y2
4A2
4Y2
2A3
2Y3
4A3
4Y3
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Product Pin Description
Pin Name OE Ax Yx GND VCC Description 3-State Output Enable Inputs (Active LOW) Inputs 3-State Outputs Ground Power
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PI74ALVCH162244 16-Bit Buffer Driver with 3-STATE Outputs
Truth Table(1)
Inputs OE L L H Ax H L X Outputs Yx H L Z
Product Pin Configuration
Notes: 1. H = High Signal Level L = Low Signal Level X = Don't Care or Irrelevant Z = High Impedance
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCH162244 16-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 +0.5V Output Voltage Range, VOUT ............................................. 0.5V to VCC +0.5V DC Input Voltage ................................................................... 0.5V to +5.0V DC Output Current ............................................................................. 100 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 = 2.3V VIH = 2.0V, IOH = - 8mA, VCC = 2.7V 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 = 3.0V 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
PS8092B 07/14/00
V
VOH
IOH(3)
mA
IOL(3)
O utput LO W Current
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PI74ALVCH162244 16-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 To (OUTPUT) Y Y Y VCC = 2.5V 0.2V M in.(2) 1.0 1.0 1.0 M ax. 4.9 6.8 6.3 VCC = 2.7V M in.(2) 4.7 6.7 5.7 VCC = 3.3V 0.3V M ax. 4.2 5.6 5.5 ns 1.0 1.0 1.0 M ax. M in.(2) Units
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.
Operating Characteristics, TA = 25C
Parame te r CPD Power Dissipation Outputs Enabled Capacitance Outputs Disabled Te s t Conditions CL = 50pF, f = 10 MHz VCC = 2.5V 0.2V VCC = 3.3V 0.3V Typical 16 4 18 6 Units
pF
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
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PS8092B 07/14/00

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