|Category||Logic => Bus Interface => Bus Oriented Circuits|
|Title||Bus Oriented Circuits|
|Description||16-Bit Bus Switch W/25 Ohm Resistor (FCT16244 Pinout)|
|Company||Pericom Semiconductor Corporation|
|Datasheet||Download PI5C162244 datasheet
|Cross ref.||Similar parts: FST162244MTD|
Near-zero propagation delay 5 switches connect inputs to outputs when enabled Direct bus connection when switches are ON Ultra-low quiescent power (0.2 µA typical) Ideally suited for notebook applications Pin compatible with 74 series16244 Industrial operating temperature: to +85°C Packages available: 48-pin 240 mil wide thin plastic TSSOP (A) 48-pin 300 mil wide plastic SSOP (V) 48-pin 150 mil wide plastic BQSOP (B)
Pericom Semiconductor's PI5C series of logic circuits are produced in the Company's advanced 0.6 micron CMOS technology. The PI5C16244 and PI5C162244 are 16-bit, 4-port bus switches that are pin compatible with the 74 series 16244 16-bit driver. Four enable signals (nBE) turn the switches on similar to the enable signals of the 16244. The bus switch creates no additional propagation delay or ground bounce noise. The PI5C162244 device has a built-in 25-ohm series resistor to reduce noise because of reflections, thus eliminating the need for an external terminating resistor.
Note: H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
Pin Name nBE nA0-nA7 nB0-nB7 I/O I I/O Description Bus Output Enable (Active LOW) Bus A Bus B
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature.................................................................. to +150°C Ambient Temperature with Power Applied................................. to +85°C Supply Voltage to Ground Potential (Inputs & Vcc Only)........... to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only)....... +7.0V DC Input Voltage......................................................................... +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.
Parameters Description VIH VIL IIH IIL IOZH VIK IOS VH RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC = Max., VIN = GND A, B VCC = Min., IIN mA A (B) 0V, B (A) = VCC = Min., VIN = 0.0V, ION 48 mA VCC = Min., VIN = 2.4V, ION 15 mAInput Hysteresis at Control Pins Switch On Resistance
Parameters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On Test Conditions VIN = 0V VIN = 0V VIN = 0V Typ. Max. 6 8 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 = 25°C 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.
Parameters Description 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 nBE = GND Control Input Toggling 50% Duty Cycle VIN = GND or VCC VIN = 3.4V(3) Min. Typ(2) 0.1 Max. 2.5 0.25 Units µA mA 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, +25°C 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 or DC currents as they transition. This parameter is not tested, but is guaranteed by design.Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ
Description Propagation Delay xAx to xBx Bus Enable Time XBE to xAx or xBx Bus Disable Time XBE to xAx or xBx
Description Propagation Delay(2,3) xAx to xBx Bus Enable Time XBE to xAx or xBx Bus Disable Time XBE to xAx or xBx
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 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. Pericom Semiconductor Corporation 2380 Bering Drive San Jose, 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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