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PI74ALVCHR162245
3.3V 16-Bit Bidirectional Transceiver with 3-State Output
Product Features
PI74ALVCHR162245 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 All output ports have equivilent 26 series resistors: No external resistors are required Bus Hold retains last active bus state during 3-state eliminating the need for external pull-up 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 to achieve industry-leading speed grades. The PI74ALVCHR162245 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.
Logic Block Diagram
1DIR 2DIR
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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PI74ALVCHR162245 3.3V 16-Bit Bidirectional Transceiver with 3-State Outputs
Product Pin Description
Pin Name xO E xDIR
XAX XBX
Truth Table(1)
Inputs xOE L L H xD IR L H X Outputs Bus B Data to Bus A Bus A Data to Bus B Z
De s cription 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
GND VCC
Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance
Product Pin Configuration
1DIR 1B0 1B1
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
48 47 46 45 44 43 42 41 40 39
1OE 1A0 1A1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48-PIN V48 A48
GND
1B2 1B3
GND
1A2 1A3
Storage Temperature ............................................. 65C to +150C Ambient Temperature with Power Applied ........... 40C to +85C Input Voltage Range, VIN ........................................ 0.5V to +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
VCC
1B4 1B5
VCC
1A4 1A5
GND
1B6 1B7 2B0 2B1
GND
1A6 1A7 2A0 2A1
38 37 36 35 34 33 32 31 30 29 28 27 26 25
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.
GND
2B2 2B3
GND
2A2 2A3
VCC
2B4 2B5
VCC
2A4 2A5
GND
2B6 2B7 2DIR
GND
2A6 2A7 2OE
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PI74ALVCHR162245 3.3V 16-Bit Bidirectional Transceiver with 3-State Outputs
M in. 2.3 1.7 2.0 0.7 0.8 0 0 VCC VCC Typ.(2) M ax. 3.6 Units
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) De s cription Supply Voltage Input HIGH Voltage Input LOW Voltage Input Voltage Output Voltage IOH = - 100 A, 2.3V to 3.6V IOH = - 4mA VOH Output HIGH Voltage IOH = - 6mA IOH = - 8mA IOH = - 12mA IOL = 100A, 2.3V to 3.6V IOL = 4mA VOL Output LOW Voltage IOL = 6mA IOL = 8mA IOL = 12mA VCC = 2.3V IOH(3) Output HIGH Current VCC = 2.7V VCC = 3.0V VCC = 2.3V IOL(3) IIN Output LOW Current Input Current VCC = 2.7V VCC = 3.0V 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 Output Current (3- State Outputs) 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 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 4 9 45 - 45 75 - 75 500 10 40 750 pF A VIL = 0.7V VIH = 2V VIL = 0.7V VIL = 0.8V VIL = 0.8V VIL = 0.8V 2.3V 2.7V 2.3V 3V 2.7V 3V VIH = 1.7V VIH = 2V VIH = 1.7V VIH = 2V VIH = 2V VIH = 2V 2.3V 2.7V 2.3V 3V 2.7V 3V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V Te s t Conditions (1)
Vcc - 0.2 1.9 2.2 1.7 2.4 2 2 0.2 0.4 0.4 0.55 0.55 0.6 0.8 -6 -8 - 12 6 8 12 5 mA V
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.
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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 B or A To (OUTPUT) 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) M ax. 4.7 6.7 5.7 VCC = 3.3V 0.3V M in.(2) 1.0 1.0 1.0 M ax. 4.2 5.6 5.5 ns Units
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCHR162245 3.3V 16-Bit Bidirectional Transceiver with 3-State Outputs
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 rs Cpd Power Dissipation Capacitance O utputs Enabled O utputs Disabled Te s t Conditions CL = 50pF, f = 10 MHz VCC = 2.5V 0.2V Typ. 24 4 VCC = 3.3V 0.3V Typ. 32 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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