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PI5C34171C
17-Bit to 34-Bit, Demux PCI Hot-Plug Bus Switch with -2V Undershoot Protection
Product Features
* * * * * * * * RON is 5 Ohm typical Undershoot protection on A port only: -2V Industrial Operation Temperature: -40C to +85C Near Zero propagation delay Channel ON Capacitance: 15pF max. VCC Operating Range: +5V10% ESD>2000V....Human Body Model >100 MHz switching (enable clock rate) at 20pF load capacitance * Packages: - 56-pin plastic TSSOP (A)
Product Description
Pericom Semiconductor's PI5C series of logic circuits are produced using the Company's advanced submicron CMOS technology, achieving industry leading performance. The PI5C34171C is a 17 to 34-bit demultiplexer bus switch. It is intended for PCI Hot-Plug applications. Industry leading advantages include a propagation delay of 250ps, resulting from 5-Ohm channel resistance, and low I/O Capacitance. A port demultiplexes to either 1B and 2B or to both. The switch is bidirectional. The A port can handle up to -2V undershoot during switch disable. Application Provides PCI Hot Plugging
Logic Block Diagram
1A 1B1 1B2 17A 17B1 17B2 SEL1 SEL2
Pin Description
Function nA to nB1 nA to nB2 nA to nB1 and nB2 nB1, nB2 = Hi- Z
SEL1 L H L H
SEL2 H L L H
1B1 2B1 2A 3B1 4B1 4A 5B1 6B1 6A 7B1 8B1 8A GND V CC 9B1 10B1 10A 11B1 12B1 12A 13B1 14B1 14A 15B1 16B1 16A 17B1 SEL1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
56-Pin A
1A 1B2 2B2 3A 3B2 4B2 5A 5B2 6B2 7A 7B2 8B2 GND 9A 9B2 10B2 11A 11B2 12B2 13A 13B2 14B2 15A 15B2 16B2 17A 17B2 SEL2
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PS8498A
11/15/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34171C 17-Bit to 34-Bit, Demux PCI Hot-Plug Bus Switch with -2V Undershoot Protection
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.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5V 10%)
Parame te rs De s cription VIH VIL IIH IIL IO ZH VIK RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Switch On Resistance(4) Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VC C = Max., Vin = VC C VC C = Max., Vin = GND 0 A, B VC C VC C = Min., IIN = -18mA VC C = Min., VIN = 0.0V, IO N = 48mA VC C = Min., VIN = 2.4V, IO N = 15mA VUP Undershoot Protection Voltage(3) Max. Inputs, Undershoot Pulse Duration <25ns M in. 2.0 -0.5 -- -- -- -- -- -- -- Typ(2) -- -- -- -- -- -0.7 5 10 -- -1.8 8 18 -2.0 V V 1 A M ax. -- 0.8 Units V
Notes: 1. For Min. or max. conditions, use appropriate value specfied under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, TA = 25C ambient and maximum loading. 3. On AN (Data Input) pins only. 4. Measured by the voltage drop between A and B pins at indicated current through the switch. On resistance is determined by the lower of the voltages on the two (A & B) pins.
Capacitance (TA = 25C, f = 1 MHz)
Parame te rs (1) C IN CO F F (B) CO N De s cription Input Capacitance B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Te s t Conditions Typ. 3.5 4.5 13 . 5 M a x. -- -- -- 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 pins 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
PS8498A
11/15/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34171C 17-Bit to 34-Bit, Demux PCI Hot-Plug Bus Switch with -2V Undershoot Protection
Power Supply Characteristics
Parame te rs (1) ICC ICC De s cription Quiescent Power Supply Current VCC = Max. Te s t Conditions VIN = GND or VCC VIN = 3.4V(3) other pin = VCC or GND M in. -- -- Typ.(2) M ax. -- 200 2.5 Units A mA mA/ MHz
Supply Current per VCC = Max. Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max., A & B Pins Open Control Input Toggling 50% Duty Cycle
ICCD
--
--
0.60
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. 5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
Switching Characteristics over Operating Range
PI5C34171C Com Parame te rs tP LH tP HL tP ZH tP ZL tP HZ tP LZ De s cription Propagation Delay(2,3) A to B Bus Enable Time SEL to A,B Bus Disable Time SEL to A,B C L = 50pF RL = 500 Conditions M in. - 10 1 Typ 0.25 - - M ax. - 40 6 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.
3
PS8498A
11/15/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C34171C 17-Bit to 34-Bit, Demux PCI Hot-Plug Bus Switch with -2V Undershoot Protection
56-pin TSSOP (A)
56
.236 .244
6.0 6.2
1
.547 .555
13.9 14.1 1.20 .047 Max. SEATING PLANE
.004 0.09 .008 0.20 0.45 .018 0.75 .030 .319 BSC 8.1
.0197 BSC 0.50 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.007 .011 0.17 0.27
.002 .006 0.05 0.15
Ordering Information
Part PI5C34171CA Pin - Package 56- TSSOP (A) Width 240- 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 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
4
PS8498A 11/15/00

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