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PI3B16210 PI3B162210 (25)
3.3V, Hot Insertion 20-Bit, 2-Port BusSwitch
Product Description
Product Features
* * * * * * * * Near-zero propagation delay 5 or 25 switches connect inputs to outputs Fair Switching Speed - 4.5ns max. 32X384 function with flow through pinout make board layout easier Permits Hot Insertion. Vcc Operating Range: 3.0V to 3.6V Industrial operating temperature: -40C to +85C Packages available: - 48-pin 150-mil wide plastic QSOP (B) - 48-pin 240-mil wide plastic TSSOP (A) - 48-pin 300-mil wide plastic SSOP (V)
Pericom Semiconductor's PI3B series of BusSwitch circuits are produced in the Company's advanced 0.35 micron CMOS technology, achieving industry leading speed. The PI3B16210 is configured as 3.3 volt 20-bit, 2-port bus switches designed with a low ON resistance (5) 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 (xOE) input signal. The PI3B162210 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor.
Logic Block Diagram
1A1 1B1
Product Pin Configuration
1A10
1B10
1OE
48-Pin
2A1
2B1
2A10
2B10
2OE
Truth Table(1)
Inputs 1OE L L H H 2OE L H L H Inputs/Outputs 1A,1B 1A = 1B 1A = 1B Z Z 2A,2B 2A = 2B Z 2A = 2B Z
Product Pin Description
Pin Name 1OE, 2OE 1A1-1A10, 2A1-2A10 1B1 - 1B10, 2B1 - 2B10
1
Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
Description Bus Enable Inputs (Active LOW) Bus A Bus B
PS8193B 11/09/98
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PI3B16210/162210 3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch
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 .................................. -0C to +85C Supply Voltage Range .................................................................. -0.5V to +4.6V DC Input Voltage ......................................................................... -0.5V to +4.6V 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 = 3.0V to 3.6V)
Parameters Description VIH VIL II IOZH VIK RON Input HIGH Voltage Input LOW Voltage Input Current High Impedance Output Current Clamp Diode Voltage Switch On Resistance
(3)
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VIN = VCC or GND VCC = 0V, VIN = VCC 0 A, B VCC VCC = Min, IIN = -18mA VCC = 3V, VIN = 0.0V, ION = 24 mA, 64mA VCC = 3V, VIN = 2.4V, ION = 15mA 16210 162210 16210 162210
Min. 2.0 -0.5 -- -- -- -- -- 20 -- 20
Typ(2) -- -- -- -- -- -0.7 5 28 -- 35
Max. -- 0.8 1 1 10 -1.2 8 40 15 48
Units V V A A A V
Capacitance (TA = 25C, f = 1 MHz)
Parameters(4) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch OFF A/B Capacitance, Switch ON Test Conditions VIN = 0V VIN = 0V VIN = 5V Typ 3.0 8.5 17.0 Units pF
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 = 3.3V, TA = 25C ambient and maximum loading. 3. 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. 4. This parameter is determined by device characterization but is not production tested.
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PS8193B
11/09/98
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PI3B16210/162210 3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch
Power Supply Characteristics
Parameters Description ICC ICC ICCD Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) Test Conditions(1) VCC = Max. VCC = Max. VCC = Max. A and B Pins Open BE = GND Control Input Toggling 50% Duty Cycle VIN = GND or VCC VIN = 3.0V(3) Min. Typ(2) Max. 10 750 0.25 Units A A 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 = 3.3V, +25C ambient. 3. Per TTL driven input (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
Com.
Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay Ax to Bx, Bx to Ax Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx
(2,3)
Conditions CL = 50pF RL = 500 CL = 50pF, RL = 500, R = 500
(1)
Min 16210 162210 1 1
Max 0.25 1.25 4.5 5.0
Units
ns
Notes: 1. See test circuit and wave forms. 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.
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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PS8193B 11/09/98

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