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PI5C32X384/32X384C
20-Bit, 2-Port Bus Switch
Features
* * * * Near-Zero propagation delay 5 switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power 32X384 (0.2A typical) - Ideally suited for notebook applications * Packaging (Pb-free & Green Available): - 48-pin 150-mil wide plastic BQSOP (B) - 48-pin 240-mil wide plastic TSSOP (A)
Description
Pericom Semiconductor's PI5C32X384 and PI5C32X384C are 20-bit bus switches designed with a low On-Resistance allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BE) input signal. Four bus enable signals are provided, one for each of the upper and lower five bits of the two 10-bit buses.
Block Diagram
A0 B0 A5 B5
Pin Configuration
BEA B0 A0 A1 B1 B2 A2 A3 B3 B4 A4 GND BEC B5 A5 A6 B6 B7 A7 A8 B8 B9 A9 GND
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
A4 A15
B4 B15
A9 A10
B9 B10
VCC B19 A19 A18 B18 B17 A17 A16 B16 B15 A15 BEB VCC B14 A14 A13 B13 B12 A12 A11 B11 B10 A10 BED
A19 BEA BEB BEC BED
B19
A14
B14
Pin Description
Pin Name BEX A19-A0 B19-B0 GND VCC Description Bus Enable Inputs (Active LOW) Bus A Bus B Ground Power
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PS7027F
09/09/04
PI5C32X384/PI5C32X384C 20-Bit, 2-Port 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 (Inputs & Vcc Only) ......-0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ...-0.5V to +7.0V DC Input Voltage .....................................................................-0.5V to +7.0V 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.
Truth Table(1)
Function Disconnect Connect Connect Connect Function Disconnect Connect Connect Connect BEA H L H L BEC H L H L BEB H H L L BED H H L L B4-B0 Hi-Z A4-A0 Hi-Z A4-A0 B9-B5 Hi-Z A9-A5 Hi-Z A9-A5 B19-B15 Hi-Z Hi-Z A19-A15 A19-A15 B14-B10 Hi-Z Hi-Z A14-A10 A14-A10
Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5V 5%)
Parameters VIH VIL IIH IIL IOZH IOS VH RON Description Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Short Circut Switch Current(3) Input Hysteresis at Control Pins On-Resistance(4) Test Condidtions(1) Min. 2.0 Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 (A, B) (C, D) VCC A,B (C, D) = 0V, C, D (A, B) = VCC VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA
Typ.(2) 300 5 10
Max. 0.8 1 1 1 7 15
Units V
mA mV
2
PS7027F
09/09/04
PI5C32X384/PI5C32X384C 20-Bit, 2-Port Bus Switch
Capacitance (TA = 25C, f = 1 MHz)
Parameters(5) CIN COFF CON Descritption Input Capacitance A/B Capacitance, Switch OFF A/B Capacitance, Switch On Test Condidtions VIN = 0V VIN = 0V VIN = 0V Type 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 AB and CD pin at indicated current through the switch. On-Resistance is determined by the lower of the voltages on the two (A or B, C or D) pins. 5. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4)
Test Condidtions(1) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open BE1 or BE2 = GND Control Input Toggling 50% Duty Cycle VIN = GND PI5C32X384C or VCC PI5C32X384
Min.
Typ.(2) 60 0.1
Max. 200 3.0 2.5
Units A mA
ICCD
0.25
mA/ MHz
Notes: 1. For Max. or Min. conditons, 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.
3
PS7027F
09/09/04
PI5C32X384/PI5C32X384C 20-Bit, 2-Port Bus Switch
Switching Characteristics over Operating Range
Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BEx to Ax or Bx Bus Disable Time BEx to Ax or Bx CL = 50 pF, RL = 500 Conditions(1) PI5C32X384/PI5C32X384C Min. 1.5 1.5 Typ. 0.25 Max. ns 6.5 5.5 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.
Package Mechanical: 48-pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.488 12.4 .496 12.6
.047 1.20 Max
SEATING PLANE
.004 0.09 .008 0.20
0.45 .018 0.75 .030
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010
0.17 0.27
.002 .006 0.05 0.15
.319 BSC 8.1
4
PS7027F
09/09/04
PI5C32X384/PI5C32X384C 20-Bit, 2-Port Bus Switch Package Mechanical: 48-pin BQSOP (B)
48
.150 .157 3.80 4.00
.228 .244 5.80 6.20
Gauge Plane
1
.010 0.25 BSC
.386 .394 9.80 10.00
.020 .029 0.50 0.75
.015 0.381 x 45
.014 0.356 REF
.008 0.20 Nom
Nom .063 1.60
.079 2.0 Max .002 0.05 .009 0.25
.0157 BSC 0.40
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.0051 .009 0.13 0.23
5
Ordering Information
Ordering Code PI5C32X384B PI5C32X384BE PI5C32X384A PI5C32X384AE PI5C32X384CA PI5C32X384CAE PI5C32X384CB PI5C32X384CBE Package Code B B A A A A B B Package Description 48-pin 150-mil wide plastic BQSOP Pb-free & Green, 48-pin 150-mil wide plastic BQSOP 48-pin 240-mil wide plastic TSSOP Pb-free & Green, 48-pin 240-mil wide plastic TSSOP 48-pin 240-mil wide plastic TSSOP Pb-free & Green, 48-pin 240-mil wide plastic TSSOP 48-pin 150-mil wide plastic BQSOP Pb-free & Green, 48-pin 150-mil wide plastic BQSOP
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
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PS7027F 09/09/04

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