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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3VT3384
10-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: 24-pin, 150 mil wide plastic QSOP (Q) 24-pin, 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductors PI3VT series of logic circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. The PI3VT3384, is a 2.5V or 3.3V 8-bit, 2-port bus switch, is 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
A0 B0
Product Pin Configuration
BEA B0
A4 B4
1 2 3 4
24 23 22 21
VCC B9 A9 A8 B8 B7 A7 A6 B6 B5 A5 BEB
A0 A1 B1 B2
5 20-Pin 20 6 7 8 9 10 11 12
L,Q
19 18 17 16 15 14 13
A5
B5
A2 A3
A9
B9
B3 B4 A4
BEA BEB
GND
Truth Table(1)
Function Disconnect Connect Connect Connect BEA H L H L BEB H H L L B0-B4 Hi- Z A0- A4 Hi- Z A0- A4 B5B9 Hi- Z Hi- Z A5- A9 A5- A9
Product Pin Description
Pin Name BEA, BEB A0- A9 B0- A9 GND VCC D e s cription Bus Enable Input (Active LO W) Bus A Bus B Ground Power
Notes: 1. H = High Voltage Level; X = Low Voltage Level L = Low Voltage Level; Hi-Z = High Impedance
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PS8529
03/19/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3VT3384 10-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 D e s cription Input HIGH Voltage Input LO W Voltage Input HIGH Current Input LO W Current High Impedance O utput Current Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LO W Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., VIN = 0.0V, ION = 8mA RON Switch O n 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
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PS8529
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PI3VT3384 10-Bit, 2-Port, Low Voltage Translator Bus Switch
Capacitance (TA = 25C, f = 1 MHz)
Parame te rs ( 5 ) CI N CO F F CO N
De s cription Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On
Te s t Conditions VIN = 0V
Typ. 3.5 5.0 10.0
Units 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, 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.
Power Supply Characteristics
Parame te rs ICC ICC De s cription Quiescent Power Supply Current Supply 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 r tPLH tPHL tPZH tPZL tPHZ tPLZ Te s t Conditions Propagation Delay (2,3), Ax to Bx Bus Enable Time; BE to Ax or Bx Bus Disable Time; BE to Ax or Bx Conditions (1) CL = 50pF RL = 500 Ohms CL = 50pF RL = 500 Ohms R = 500 Ohms Com. M in. 1.5 1.5 M ax. 0.25 6.5 5.5 ns Units
3
PS8529
03/19/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3VT3384 10-Bit, 2-Port, Low Voltage Translator Bus Switch
Switching Characteristics over 2.5V 0.2V Operating Range
Parame te r tPLH tPHL tPZH tPZL tPHZ tPLZ Te s t Conditions Propagation Delay (2,3), Ax to Bx Bus Enable Time; BE to Ax or Bx Bus Disable Time; BE to Ax or Bx Conditions (1) CL = 50pF RL = 500 Ohms CL = 50pF RL = 500 Ohms R = 500 Ohms Com. M in. 1.5 1.5 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.
24-pin QSOP package (Q24)
24
.150 .157
3.81 3.99 .015 x 45 0.38
1 .337 .344 8.56 8.74 .016 .050 .053 .069 1.35 1.75 0.406 1.27 .228 .244 5.79 6.20 .007 .010 0.178 0.254
.033 0.84
SEATING PLANE .004 0.101 .010 0.254
.025 typical 0.635
.008 0.203 .012 0.305
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
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PS8529
03/19/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3VT3384 10-Bit, 2-Port, Low Voltage Translator Bus Switch
24-pin TSSOP package (L24)
24
.169 .177
4.3 4.5
1
.303 .311 7.7 7.9 .047 1.20 Max
.004 .008 0.45 0.75 SEATING PLANE .018 .030
0.09 0.20
.252 BSC 6.4
.0256 BSC 0.65
.007 .012 0.19 0.30
.002 .006
0.05 0.15
X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS
Ordering Information
Part PI3VT3384L PI3VT3384Q Pin-Package 24- TSSOP (L) 24- QSOP (Q) Te mpe rature 40C to +85C 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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PS8529 03/19/01

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