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PI3C6800
2.5V/3.3V, 2-Port, 10-Bit Bus Switch with Precharged Outputs for Live Insertion
Product Features
Near zero propagation delay 5 switch connection between two ports High Bandwidth (>400 MHz) Rail-to-Rail 3.3V or 2.5V Switching Outputs are precharged by bias voltage to minimize signal distortion during live insertion 5V I/O Tolerant 2.5V Supply Voltage Operation Package options: 24-pin 150 mil wide plastic QSOP (Q) 24-pin 173 mil wide TSSOP (L)
Product Description
Pericom Semiconductors PI3C series of logic circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. The PI3C6800 is a 10-bit bus switch with low on-state resistance. The bus switch creates no additional propagation delay. To minimize live-insertion noise, the device also precharges the B port to a userselectable bias voltage (BIASV). The switch is turned on by a single enable (ON) input. When ON is LOW, the switch is on and port A is connnected to port B. When ON is HIGH, the switch between port A and port B is open and the B port is precharged to BIASV through the equivalent of a 10-k resistor.
Logic Diagram
13
Product Pin Configuration
A1
23
B1
A10
14
B10
ON
Truth Table(1)
Function Connect Precharge Note: 1. H = High Voltage Level L = Low Voltage Level ON L H B1 - B10 A1 - A10 BIASV
ON A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 GND
1 2 3 4 5 6 7 8 9 10 11 12
24-Pin L, Q
24 23 22 21 20 19 18 17 16 15 14 13
VCC B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 BIASV
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PI3C6800 2.5V/3.3V, 2-Port, 10-Bit Bus Switch with Precharged Outputs for Live Insertion
Absolute Maximum Ratings Over Free-Air Temperature Range*
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ........................................ 65C to +150C Note: Stresses greater than those listed under MAXIMUM RATINGS Supply Voltage Range .......................................... 0.5V to 4.6V may cause permanent damage to the device. This is a stress rating DC Input Voltage(1) ............................................... 0.5V to +7V only and functional operation of the device at these or any other Input Clamp Current, IIK (V1< 0) .....................................50mA conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum DC Output Current ......................................................... 120 mA rating conditions for extended periods may affect reliability. (2) Power Dissipation .......................................................... 0.5W Notes: 1. Input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. Maximum package power dissipation is calculated using a junction temperatue of 150C and a board trace length of 750 mils.
1 2 3 4 5 6 7
Recommended Operating Conditions
M in. VCC BIASV VIH VIL TA Supply voltage Supply voltage High- level input voltage Low- level input voltage O perating free- air temperature 40 2.3 1.3 2 0.8 85 C Typ. 3.3 VCC V Units
Electrical Characteristics (Over Recommended Operating Free-air Temperature Range)
Parame te rs VIK II IO ICC ICC CIN C O FF De s cription Clamp Diode Voltage Input Current Output Current Quiescent Power Supply Current Power Supply Current per Input Input Capacitance A/B Capacitance Te s t Conditions VCC = 3.0V, IIN = 18mA VCC = 3.6V, VIN = VCC or GND VCC = 3.0V, BIASV = 2.4V, VO = 0 0.25 260 500 2.5 3.5 5.0 5 8.0 8.0 7 15 15 M in. Typ. M ax. 1.2 5 Units V A mA A
8 9 10 11
VCC = 3.6V, IO = 0, VIN = VCC or GND VCC = 3.6V, One input at 2.7V Other at VCC or GND VCC = 0V VCC = 0V, Switch Off VIN = 0, IIN = 64mA
mA
12
pF
13 14 15
RON*
Switch ONResistance
VCC = 3.0V
VIN = 2.4V, IIN = 30mA VIN = 2.4V, IIN = 15mA
Notes: * Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages of the two (A or B) terminals. This is the increase in supply current for control input. All typical values are at VCC = 3.3V, TA = 25C.
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VOUT, (V)
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PI3C6800 2.5V/3.3V, 2-Port, 10-Bit Bus Switch with Precharged Outputs for Live Insertion
3.3V Switching Characteristics (Over Recommended Operating Free-air Temperature Range, CL = 50pF)
Parame te r tPD(1) tPZH tPZL tPHZ tPLZ BIASV = GND BIASV = 3V BIASV = GND BIASV = 3V Te s t Conditions From (Input) A or B ON To (Output) B or A A or B 1.5 1.5 1.5 1.5 M in. M ax. 0.25 6.5 6.5 5.5 5.5 ns Units
1 2 3 4
ON
A or B
2.5V Switching Characteristics (Over Recommended Operating Free-air Temperature Range, CL = 50pF)
Parame te r tPD(1) tPZH tPZL tPHZ tPLZ BIASV = GND BIASV = 3V BIASV = GND BIASV = 3V Te s t Conditions From (Input) A or B ON To (Output) B or A A or B 1.5 1.5 1.5 1.5 M in. M ax. 0.25 9.8 9.8 8.3 8.3 ns Units
5 6 7 8 9 10 11
ON
A or B
Note: 1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on state resistance of the switch and a load capacitance of 50pF, when driven by an ideal voltage source (zero output impedance).
4.0
VCC = 3.3V 3.1V 2.9V 2.7V 2.5V 2.3V
3.8V 3.6V 3.4V 3.2V 3.0V 2.8V
2.0
12 13 14
0.0 0.0
1.0
2.0 VIN, (V)
3.0
4.0
5.0
15
Output Voltage vs. Input Voltage over Various Supply Voltages
PS8191D 05/03/00
Output Voltage vs. Input Voltage over Various Supply Voltages
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PI3C6800 2.5V/3.3V, 2-Port, 10-Bit Bus Switch with Precharged Outputs for Live Insertion
1
Parameter Measurements
S1 6V Open GND
Te s t tPD tPLZ/tPZL
S1 Open 6V GND
2 3 4
From Output Under Test CL = 50pF (See note 1)
500
500
tPHZ/tPZH
LOAD CIRCUIT
Output Control (Low Level Enabling) Output Waveform 1 S1 at 6V (see Note 2) Output Waveform 2 S1 at Open (see Note 2)
3V 1.5V tPZL 1.5V VOL +0.3V tPZH 1.5V tPHZ VOH VOH -0.3V 0V VOL tPLZ 3.5V 1.5V 0V
5 6 7 8 9 10 11 12 13 14 15
VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES
Notes: 1. CL includes probe and jig capacitance. 2. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. 3. All input pulses are supplied by generators having the following characteristics: PRR<10MHz, ZO = 50, tR 2.5ns, tF 2.5ns. 4. The outputs are measured one at a time with one transition per measurement. 5. tPLZ and tPHZ are the same as tDIS. 6. tPZL and tPZH are the same as tEN. 7. tPLH and tPHL are the same as tPD.
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PI3C6800 2.5V/3.3V, 2-Port, 10-Bit Bus Switch with Precharged Outputs for Live Insertion
24-Pin TSSOP (L) Package
24
1 2
.004 .008 0.09 0.20
.169 .177
4.3 4.5
1
.303 .311 7.7 7.9 .047 1.20 Max
3 4 5 6
0.45 0.75 SEATING PLANE
.018 .030
.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
24-Pin QSOP (Q) Package
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
7 8 9 10
.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
11
Te mpe rature 40C to 85C 40C to 85C
Ordering Information
Part PI3C6800L PI3C6800Q Pin - Package 24 - TSSOP (L) 24 - QSOP (Q )
Logic Inputs
Applications Information
12 13 14 15
The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, IN may be driven low to 0V and high to 3.6V. Driving IN Rail-to-Rail(R) minimizes power consumption.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying VBIAS and signals to input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
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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