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PI74ALVCH16827
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20-Bit Buffer/Driver with 3-STATE Outputs Product Features
* PI74ALVCH16827 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 * 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 Semiconductor's PI74ALVCH series of logic circuits are produced in the Company's advanced 0.5 micron CMOS technology, achieving industry leading speed grades. The PI74ALVCH16827 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 outputenable input is HIGH, the outputs of that 10-bit buffer section 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 pull-up resistor; the minimum value of the resistor is determined by the current sinking ability of the driver. The PI74ALVCH16827 has the "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.
Logic Block Diagram
1 56 1OE2 55 2 2OE2 42 15 28 29
1OE1
2OE1
1A1
1Y1
2A1
2Y1
To 9 other channels
To 9 other channels
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PI74ALVCH16827 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 Description
Pin Name OE AX YX GND VCC D e s cription O utput Enable Inputs (Active LOW) Data Inputs 3- State O utputs Ground Power
Product Pin Configuration
1OE1 1Y1 1Y2
Note: 1. H = L= X= Z=
High Signal Level Low Signal Level Irrelevant High Impedance
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
1OE2 1A1 1A2
GND
1Y3 1Y4
GND
1A3 1A4
VCC
1Y5 1Y6 1Y7
VCC
1A5 1A6 1A7
GND
1Y8 1Y9 1Y10 2Y1 2Y2 2Y3
GND
1A8 1A9 1A10 2A1 2A2 2A3
56-PIN 43 V56 A56 42
41 40 39 38 37 36 35 34 33 32 31 30 29
44
GND
2Y4 2Y5 2Y6
GND
2A4 2A5 2A6
VCC
2Y7 2Y8
VCC
2A7 2A8
GND
2Y9 2Y10 2OE1
GND
2A9 2A10 2OE2
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PS8091A 03/26/97
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PI74ALVCH16827 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 +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 = - 6mA, VCC = 2.3V VIH = 1.7V, IOH = - 12mA, VCC = 2.3V VIH = 2.0V, IOH = - 12mA, VCC = 2.7V VIH = 2.0V, IOH = - 12mA, VCC = 3.0V VIH = 2.0V, IOH = - 24mA, VCC = 3.0V IOL = 100mA, VIL = Min. to Max. VOL O utput LO W Voltage VIL = 0.7V, IOL = 6mA, VCC = 2.3V VIL = 0.7V, IOL = 12mA, VCC = 2.3V VIL = 0.8V, IOL = 12mA, VCC = 2.7V VIL = 0.8V, IOL = 24mA, 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 VCC - 0.2 2.0 1.7 2.2 2.4 2.0 0.2 0.4 0.7 0.4 0.55 - 12 - 12 - 24 12 12 24 mA V Te s t Conditions (1) M in. 2.3 1.7 2.0 0.7 0.8 VCC VCC Typ.(2) M ax. 3.6 Units
Input LO W Voltage Input Voltage O utput Voltage
VOH
IOH(3)
IOL(3)
O utput LO W Current
3
PS8091A 03/26/97
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PI74ALVCH16827 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 7.5 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(1) VCC = 2.5V 0.2V VCC = 2.7V From To (INPUT) (OUTPUT) M in.(2) M ax. M in.(2) M ax. A OE OE Transition Rise or Fall Y 1.0 1.0 1.9 0 4.7 6.5 5.8 10 0 3.9 5.7 4.9 10 VCC = 3.3V 0.3V M in.(2) 1.0 1.0 1.3 0 M ax.(2) 3.4 4.7 4.5 10 Units MHz ns ns/V
Notes: 1. See test circuit and wave forms. 2. Minimum limits are guaranteed but not tested on Propagation Delays.
Operating Characteristics, TA = 25C
Parame te r CPD Power Dissipation Capacitance Outputs Enabled 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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PS8091A 03/26/97

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