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Truth Table(1)
BEn X* H L An Hi- Z Hi- Z Bn Bn Hi- Z Hi- Z An VCC GND VCC VCC Function Disconnect Disconnect Connect
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PI3VT3306
2-Bit, 2-Port, Low Voltage Translator Bus Switch
Product Features
Near zero propagation delay Low ON resistance switches connect inputs to outputs 2.5V Supply Voltage Operation 2.5V or 1.8V switching Packages available: 8-pin, 173 mil wide plastic TSSOP (L) 8-pin, 118 mil wide plastic MSOP (U)
Product Description
Pericom Semiconductors PI3VT series of logic circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. The PI3VT3306 is a 2.5V or 3.3V 2-bit, 2-port bus switch designed with a low ON resistance (5 ohms). The switches are turned ON or enabled by the Bus Enable (BEn) input signal. Given a 3.3V supply and an input voltage of 3.3V, the switch translates to an output voltage of 2.5V. Similarly, when operated with a 2.5V supply and given 2.5V inputs, the device translates the outputs to 1.8V.
Applications
3.3V to 2.5V level shifting (voltage translation) 2.5V to 1.8V level shifting (voltage translation)
Logic Block Diagram
A1 BE1 B1
Product Pin Configuration
A2 BE2
B2
BE1 A1 B1 GND
8-Pin L, U
VCC BE2 B2 A2
Product Pin Description
Pin Name BEn A2- A1 B2- B1 VCC GND De s cription Switch Enable Bus A Bus B Power Ground
Notes: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance X = Don't Care * A pull-up resistor should be provided for power-up protection
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PS8533
03/22/01
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PI3VT3306 2-Bit, 2-Port, Low Voltage Translator Bus Switch
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 Supply Voltage to Ground Potential ......................................... 0.5V to +4.6V DC Input Voltage .................................................................. 0.5V to +5.5V DC Output Current ............................................................................ 120mA Power Dissipation ................................................................................ 0.5W 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 Operating Range, TA = 40C to +85C, VCC = 3.3V 10%)
Parame te rs VIH VIL IIH IIL IOZH De s cription Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND VCC = Min., VIN = 0.0V, ION = 8mA RON Switch On Resistance VCC = Min., VIN = 1.7V, ION = 8mA VCC = 2.3V, VIN = 0.0V, ION = 8mA VCC = 2.3V, VIN = 1.3V, ION = 8mA VP Pass Voltage VIN = VCC = 3.3V, IOUT = 5A VIN = VCC = 2.5V, IOUT = 5A 2.3 5 10 6 25 2.5 1.8 M in. 1.8 0.5 Typ.(2) M ax. VCC +0.3V 0.8 1 1 1 8 22 9 30 2.9 V A Units V
High Impedance Output Current 0 A, B VCC
Capacitance (TA = 25C, f = 1 MHz)
Parame te rs (5) CIN C O FF CON De s cription Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Te s t Conditions Typ. 3.5 5.0 10.0 pF Units
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, TA = 25C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. Measured by the voltage drop between A and B pin at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (A,B) pins. 5. This parameter is determined by device characterization but is not production tested.
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03/22/01
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PI3VT3306 2-Bit, 2-Port, Low Voltage Translator Bus Switch
Power Supply Characteristics
Parame te rs ICC ICC De s cription Quiescent Power Supply Current Quiescent Current per Input HIGH Te s t Conditions (1) VIN = GND or VCC VCC = Max. VIN
=
M in.
Typ.(2)
M ax. 3
Units
A 3V(3) 50
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 3.3V, +25C ambient. 3. Per driven input (control input only); A and B pins do not contribute to ICC.
Switching Characteristics over 3.3V 0.3V Operating Range
Parame te rs tPLH tPHL tPZH tPZL tPHZ tPLZ De s cription Propagation Delay(2,3) Ax to Bx Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx Condition(1) CL = 50pF, RL = 500 Ohms CL = 50pF, RL = 500 Ohms R = 500 Ohms 1.5 1.5 Com M in. M ax. 0.25 6.5 5.5 ns Units
Switching Characteristics over 2.5V 0.2V Operating Range
Parame te rs tPLH tPHL tPZH tPZL tPHZ tPLZ De s cription Propagation Delay(2,3) Ax to Bx Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx Condition(1) CL = 50pF, RL = 500 Ohms CL = 50pF, RL = 500 Ohms R = 500 Ohms 1.5 1.5 Com M in. M ax. 0.25 9.8 8.3 ns Units
Notes: 1. See test circuit and waveforms. 2. This parameter is guaranteed but not tested on Propagation Delays. 3. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
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PS8533
03/22/01
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PI3VT3306 2-Bit, 2-Port, Low Voltage Translator Bus Switch
8-pin TSSOP package (L)
8-pin MSOP package (U)
Ordering Information
Part PI3VT3306L PI3VT3306UX Pin-Package 8- TSSOP (L) 8- MSOP (U) Te mpe rature 40C to +85C
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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PS8533 03/22/01

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