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PI74ALVCH16245
3.3V 16-Bit Bidirectional Transceiver with 3-State Outputs
Product Features
* * * * * * * * PI74ALVCH16245 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: 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 using the Companys advanced 0.5 micron CMOS technology, achieving industry leading speed grades. The PI74ALVCH16245 is a 16-bit bidirectional transceiver designed for asynchronous two-way communication between data buses. The direction control input pin (xDIR) determines the direction of data flow through the bidirectional transceiver. The Direction and Output Enable controls are designed to operate this device as either two independent 8-bit transceivers or one 16-bit transceiver. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition. 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. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
2DIR
Logic Block Diagram
1DIR
1OE
2OE
1A0
2A0
1B0 1A1 2A1
2B0
1B1 1A2 2A2
2B1
1B2 1A3 2A3
2B2
1B3 1A4 2A4
2B3
1B4 1A5 2A5
2B4
1B5 1A6 2A6
2B5
1B6 1A7 2A7
2B6
1B7
2B7
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PS8088C
04/10/00
Product Pin Description
Pin Name xOE xDIR xAx xBx GND VCC Description 3-State Output Enable Inputs (Active LOW) Direction Control Input Side A Inputs or 3-STATE Inputs Side B Outputs or 3-STATE Outputs Ground Power
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PI74ALVCH16245 3.3V 16-Bit Bidirectional Tranceiver with 3-State Outputs
Truth Table(1)
Inputs ( 1 ) xOE L L H xDIR L H X Bus B Data to Bus A Bus A Data to Bus B Z Outputs ( 1 )
Product Pin Configuration
Notes: 1. H = High Voltage Level L = Low Voltage Level X = Don't Care Z = High Impedance
48-pin A, V
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PS8088C
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PI74ALVCH16245 3.3V 16-Bit Bidirectional Tranceiver 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)
D e s cription Supply Voltage Input HIGH Voltage Input LO W Voltage Input Voltage O utput Voltage
Te s t Conditions (1) VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V
M in. 2.3 1.7 2.0
Typ.(2)
M ax. 3.6
Units
0.7 0.8 0 0 VCC VCC
VOUT(3)
IOH = - 100A, 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 = 100A, 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 IOH(3) 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
VOH
IOL(3)
O utput LO W Current
3
PS8088C
04/10/00
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PI74ALVCH16245 3.3V 16-Bit Bidirectional Tranceiver with 3-State Outputs
M in. Typ.(2) M ax. 5 45 45 75 75 500 10 40 750 4 7 A Units
DC Electrical Characteristics-Continued (Over the Operating Range, TA = 40C to +85C, VCC = 3.3V 10%)
Parame te rs IIN D e s cription 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 ICC CI CIO O utput Current (3- STATE O utputs) Supply Current Supply Current per Input @ TTL HIGH Control Inputs A or B Ports VOUT = VCC or GND, VCC = 3.6V VCC = 3.6V, IOUT = 0A, VIN = GND or VCC VCC = 3.0V to 3.6V O ne Input at VCC - 0.6V O ther Inputs at VCC or GND VIN = VCC or GND, VCC = 3.3V VO = VCC or GND, VCC = 3.3V
pF
Notes: 1. For Max. or Min. conditions, 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 t/v(3) From (Input) A or B OE OE D e s cription Input Transition Rise or Fall 0 10 0 10 0 10 ns/V To (Output) B or A B or A B or A VCC = 2.5V 0.2V M in.
(2)
VCC = 2.7V M in.(2) M ax. 3.6 5.4 4.6
VCC = 3.3V 0.3V M in.(2) 1.0 1.0 1.0 M ax. 3 4.4 4.1
M ax. 3.7 5.7 5.2
Units
1.0 1.0 1.5
ns
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 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 22 4 29 5 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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PS8088C 04/10/00

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