Details, datasheet, quote on part number: PI5C16215C
CategoryLogic => Bus Interface => Bus Oriented Circuits
TitleBus Oriented Circuits
Description20-Bit Bus Switch W/undershoot Protection
CompanyPericom Semiconductor Corporation
DatasheetDownload PI5C16215C datasheet
Cross ref.Similar parts: CBT6820


Features, Applications

20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection

Undershoot protection 1.5V, 25ns width Near zero propagation delay 5 Ohm switches connect between two ports Fast switching speed: 4.5ns max. Permits hot insertion Isolation during power-off conditions B-Port outputs are precharged by bias voltage to minimize signal distortion during live insertion. Package options include: 48-pin 150-mil wide plastic BQSOP (B) 48-pin 240-mil wide plastic TSSOP (A)

Pericom Semiconductors PI5C series of logic circuits are produced using the companys advanced submicron CMOS technology. The PI5C16215C provides 20-bits of high-speed bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device also precharges the B-port to a user-selectable bias voltage (BIASV) to minimize liveinsertion noise. The device incorporates an internal charge pump to handle input undershoot to 1.5V and 25ns width. The device is organized as dual 10-bit bus switches with individual output-enable (OE) inputs. When OE is low, the corresponding 10-bit bus switch is on and port A is connected to port B. When OE is high, the switch is open, a high-impedance state exists between the two ports, and port B is precharged to BIASV through the equivalent a 10-k ohm resistor. To ensure the high-impedance state on power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver connected to OE.

PI5C16215C 20-Bit, Hot Insertion, BusSwitch with Precharged Outputs & Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

Absolute Maximum Ratings Over Free-Air Temperature Range

(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature..................................... to +150C Supply Voltage Range........................................ +7V DC Input to +7V Input Clamp Current, IIK (VI 50mA DC Output Current....................................................... 120mA Power Dissipation(2).................................................................... 0.5W Notes: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. The maximum package power dissipation is calculated using a junction temperatue of 150C and a board trace length of 750 mils. 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.

Recommended Operating Conditions (Over Recommended Operating Free-air Temperature Range)

Parame te r VIK II IO ICC ICCE Control pins CI Control pins CO (OFF) rON* VCC = 4.5V VCC = 4.5V VCC = 5.5V VCC = 4.5V VCC = 5.5V VCC or 0 VCC = 4V Switch Off = 15mA

De s cription Supply voltage Supply voltage High- Level input voltage Low- level input voltage Operating free- air temperature

Electrical Characteristics (Over Recommended Operating Free-air Temperature Range)

Notes: * Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages of the two or B) terminals. E This is the increase in supply current for each input that is at the specified TTL voltage level rather the VCC or GND. = All typical values are at VCC 25C. 2

L H Function A port = B port A port Z, B Port = BIASV
Switching Characteristics (Over Recommended Operating Free-air Temperature Range, = 50pF)

Parame te r tPD tPZH tPZL tPHZ tPLZ BIASV = GND BIASV = 3V BIASV = GND BIASV s t Conditions From (Input) ON To (Output) or B VCC 0.5V M in. M ax. VCC 4V M in. M ax. ns Units

Notes: 1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state resistance of the switch and a load capacitance of 50pF, when driven by an ideal voltage source (zero output impedance).

7V From Output Under Test = 50pF (See note 500ohm S1 Open GND


Output Waveform at 6V (see Note 2) Output Waveform S1 at Open (see Note 2)

Notes: 1. CL includes probe and jig capacitance. 2. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. 3. All input pulses are supplied by generators having the following characteristics: 2.5ns. 4. The outputs are measured one at a time with one transition per measurement. 5. tPLZ and tPHZ are the same as tdis. 6. tPZL and tPZH are the same as ten. 7. tPLH and tPHL are the same as tpd.


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Some Part number from the same manufacture Pericom Semiconductor Corporation
PI5C16215CA 20-Bit Bus Switch W/undershoot Protection
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