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PI5C6801C
10-Bit Bus Switch with Precharged Outputs for Live Insertion and -2V Undershoot Protection
Product Features
RON is 5 Ohm typical Undershoot protection on A-port only Industrial Operation Temperature: 40C to +85C Near Zero propagation delay VCC Operating Range: +4.0V to +5.5V Outputs are pre-charged by bias voltage to minimize signal distortion during live insertion Packages options: -24-pin 150 mil-wide plastic QSOP (Q) -24-pin 173 mil-wide plastic TSSOP (L)
Product Description
Pericoms Semiconductors PI5C series of logic circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. The PI5C6801C is a 10-bit bus switch with low on-state resistance. The bus switch creates no additional propagation delay. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise. 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
Notes: 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
1
PS8374B
05/02/00
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PI5C6801C 10-Bit BusSwitch with PrechargedOutputs for Live Insertion and -2V Undershoot Protection
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 Supply Voltage Range ................................................................ 0.5V to +7V DC Input Voltage(1) .................................................................................... 0.5V to +7V Input Clamp Current, IIK (V1<0) .......................................................... 50mA DC Output Current .............................................................................. 120mA Power Dissipation(2) .................................................................................................. 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.
Notes: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperature of 150C and a board trace length of 750 mils.
Recommended Operating Conditions
Parame te r VCC BIASV VIH VIL TA Supply voltage Supply voltage High- Level input voltage Low- level input voltage Operating free- air temperature 40 De s cription M in. 4 1.3 2 0.8 85 C M ax. 5.5 VCC V Units
Electrical Characteristics (Over Recommended Operating Free-air Temperature Range)
Parame te r VIK II IO ICC ICCE CI CO(O FF) RON* VCC = 4.5V Control pins Control pins VCC = 4.5V VCC = 5.5V VCC = 4.5V VCC = 5.5V VCC = 5.5V VI = 3V or 0V VO = 3V or 0V VCC = 4V Switch O ff VI = 2.4V VI = 0V VI = 0V VI = 2.4V II = 15mA II = 64mA II = 30mA II = 15mA Te s t Conditions II = 18mA VI = 5.5V or GND BIASV = 2.4V IO = 0A O ne input at 3.4V VO= 0V VI = VCC or GND O ther at VCC or GND 3.5 4.5 9 5.5 5 9 28 8 8 16 0.20 100 2.5 M in. Typ= M ax. 1.8 5 Units V A mA A mA pF
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. E This is the increase in supply current for each input that is at the specified TTL voltage level rather the VCC or GND. = All typical values are at VCC = 5V, TA = 25C.
2
PS8374B
05/02/00
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PI5C6801C 10-Bit BusSwitch with PrechargedOutputs for Live Insertion and -2V Undershoot Protection
Switching Characteristics (Over Recommended Operating Free-air Temperature Range, CL = 50pF)
Parame te r tpd tPZH tPZL tPHZ tPLZ BIASV = GND BIASV = 3V BIASV = GND BIASV = 3V Te s t Conditions (1) From (Input) A or B ON To (Output) B or A A or B 20 20 20 20 VCC = 5V 0.5V M in. M ax. 0.25 30 30 30 30 22 22 22 22 VCC = 4V M in. M ax. 0.25 36 36 36 36 ns Units
ON
A or B
Notes: 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).
Parameter Measurements
7V S1 From Output Under Test CL = 50pF (See note 1) Open GND
Te s t tpd tPLZ/tPZL tPHZ/tPZH
Output Control (Low Level Enabling)
S1 O pen 7V O pen
3V
LOAD CIRCUIT
1.5V tPZL 1.5V tPLZ
1.5V 0V 3.5V VOL +0.3V VOL VOH
3V Input tPLH 1.5V 1.5V 1.5V 0V tPHL VOH Output 1.5V VOL
Output Waveform 1 S1 at 6V (see Note 2) Output Waveform 2 S1 at Open (see Note 2)
tPZH 1.5V
tPHZ VOH -0.3V 0V
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.
3
PS8374B
05/02/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C6801C 10-Bit BusSwitch with PrechargedOutputs for Live Insertion and -2V Undershoot Protection
24-pin QSOP (Q)
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
4
PS8374B
05/02/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C6801C 10-Bit BusSwitch with PrechargedOutputs for Live Insertion and -2V Undershoot Protection
24-pin TSSOP (L)
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 PI5C6801CQ PI5C6801CL Pin 24 24 Package QSOP (Q ) TSSOP (L) Width 150- mil 173- mil
Applications Information
Logic Inputs The logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a +5.0V supply, IN may be driven low to 0V and high to 5.5V. 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 the 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
5
PS8374B 05/02/00

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