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PI5C3401 6-Bit, 3-Port Bus Exchange Switch
Features:
* Zero propagation delay * 5 switches connect inputs to outputs * Direct bus connection when switches are ON * Ultra Low Quiescent Power (0.2A Typical) - Ideally suited for notebook applications * Packaging (Pb-free & Green available): 24-pin 150-mil wide plastic QSOP (Q) 24-pin 300-mil wide plastic SOIC (S)
Description:
Pericom Semiconductor's PI5C3401 is a 6-bit, 3-port bus exchange switch designed with a low On-Resistance (5) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagation delay or additional ground bounce noise. The switches are turned OFF by S0 = H and S1 = H. The A bus can be connected to B bus by S0 = L and S1 = L. The B bus can be connected to C bus by S0 = H and S1 = L. The C bus can be connected to A bus by S0 = L and S1 = H.
Block Diagram
B0
Pin Configuration
A0
C0
B5
A5
C5
S0 S1
DECODER
Pin Description
Pin Name Description Bus Direction Bus A Bus B Bus C No Connect Ground Power S0, S1 A0-5
Truth Table(1)
Function Disconnect Connect A-B Connect B-C Connect C-A S0 H L H L S1 H L L H A0-5 Hi-Z B0-5 Hi-Z C0-5 B0-5 Hi-Z A0-5 C0-5 Hi-Z C0-5 Hi-Z Hi-Z B0-5 A0-5
B0-5 C0-5 NC GND VCC
Note: 1. H = High Voltage Level, L = Low Voltage Level, Hi-Z = High Impedance
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PS7020D
09/16/04
PI5C3401 6-Bit, 3-Port Bus Exchange 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 +7.0V DC Input Voltage ..................................................................-0.5V to +7.0V DC Output Current............................................................................120 mA 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 the Operating Range, TA = -40C to +85C, VCC = 5V 5%)
Parameters VIH VIL IIH IIL IOZH VIK IOS VH RON Description Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current(3) Input Hysteresis at Control Pins Switch On-Resistance(4) VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA Test Conditions(1) Min. 2.0 -0.5 Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., IIN = -18 mA A (B) = 0V, B (A) = VCC 100
Typ(2)
Max. 0.8 1 1 1
Units V
A V mA mV
-0.7 150 5 10
-1.2
7 15
Capacitance (TA = 25C, f = 1 MHz)
Parameters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Test Conditions Typ. Max. 6 6 8 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 = 5.0V, 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.
2
PS7020D
09/16/04
PI5C3401 6-Bit, 3-Port Bus Exchange Switch Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open BE = GND Control Input Toggling 50% Duty Cycle
Test Conditions(1) VIN = GND or VCC VIN = 3.4V(3)
Min.
Typ(2) 0.1
Max. 3.0 2.5
Units A mA
ICCD
0.25
mA/ MHz
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to ICC. 4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Switching Characteristics over Operating Range
Parameters tPLH tPHL tS Description Propagation Delay(2,3) Ax to Bx, Bx to Cx or Cx to Ax Bus Direction Time SX to Ax or Bx or Cx Conditions(1) Com. Min. Max. 0.25 1.5 6.5 Unit
CL = 50pF RL = 500
ns
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 0.25 ns for 50 pF 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.
3
PS7020D
09/16/04
PI5C3401 6-Bit, 3-Port Bus Exchange Switch Packaging Mechanical: 24-pin QSOP (Q)
24
.008 0.20 MIN.
.008 .013 0.20 0.33
.150 .157
3.81 3.99
Guage Plane
.010 0.254
1
.337 .344
Detail A
.016 .035 0.41 0.89
.041 1.04 REF
0-6
8.56 8.74
.015 x 45 0.38
.033 0.84
.053 .069
1.35 1.75
Detail A
SEATING PLANE
.007 .010
0.178 0.254
.016 .050
0.406 1.27
.025 typical 0.635
.008 0.203 .012 0.305
.004 0.101 .010 0.254
.228 .244 5.79 6.20
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
Packaging Mechanical: 24-pin SOIC (S)
24
.2914 .2992
7.40 7.60
.010 .029
0.254 x 45 0.737
1
.5985 15.20 .6141 15.60
0-8
.0091 .0125
0.23 0.32
.021 0.533 .031 0.787
0.41 .016 1.27 .050
.0926 2.35 .1043 2.65
.394 .419 10.00 10.65
SEATING PLANE
.050 BSC
1.27
.013 .020 0.33 0.51
.0040 .0118
0.10 0.30
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
4
PS7020D
09/16/04
PI5C3401 6-Bit, 3-Port Bus Exchange Switch Ordering Information
Ordering Code PI5C3401S PI5C3401SE PI5C3401Q PI5C3401QE Package Code S S Q Q 24-pin SOIC Pb-free & Green, 24-pin SOIC 24-pin QSOP Pb-free & Green, 24-pin QSOP Package Description
Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
5
PS7020D 09/16/04

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