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PI3B16212 PI3B162212 (25 Ohms)
3.3V, 24-Bit Bus Exchange Switch
Product Features
Near-zero propagation delay 5-ohm switches connect inputs to outputs Direct bus connection when switches are ON Fast Switching Speed: 5ns (max.) VCC Operating Range: 3.0V to 3.6V Industrial operating temperature: 40C to +85C Packages available: 56-pin 240-mil wide thin plastic TSSOP (A) 56-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI3B series of logic circuits are produced using the Companys advanced submicron CMOS technology. The PI3B16212 and PI3B162212 are 3.3 volt, 24-bit bus exchange switches designed with low ON resistance allowing inputs to be connected directly to outputs. The devices operate as a 24-bit bus switch or as a 12-bit exchanger, providing data exchange between the four signal ports via the data select pins (S0-S2). The PI3B162212 device has a built-in 25-ohm series resistor to reduce reflection noise, thus eliminating the need for an external terminating resistor.
Logic Block Diagram
ONE OF TWELVE CHANNELS 1A1 1B1
Product Pin Configuration
S0 1A1 1A2 2A1 2A2 3A1 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 S1 S2 1B1 1B2 2B1 2B2 3B1 GND 3B2 4B1 4B2 5B1 5B2 6B1 6B2 7B1 7B2 8B1 GND 8B2 9B1 9B2 10B1 10B2 11B1 11B2 12B1 12B2
1A2
1B2
3A2 GND 4A1 4A2 5A1
FLOW CONTROL
S0 S1 S2
5A2 6A1 6A2 7A1 7A2
56-Pin A, V
46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
Truth Table
Function Disconnect A1 to B1 A1 to B2 A2 to B1 A2 to B2 Disconnect A1 to B1, A2 to B2 A1 to B2, A2 to B1 S2 L L L L H H H H S1 L L H H L L H H S0 L H L H L H L H A1 Z B1 B2 Z Z Z B1 B2 A2 Z Z Z B1 B2 Z B2 B1
VCC 8A1 GND 8A2 9A1 9A2 10A1 10A2 11A1 11A2 12A1 12A2
Product Pin Description
Pin Name S0- S2 xAx xBx
1
Note: 1. H = High Voltage Level L = Low Voltage Level Z = High Impedance
I/O I I/O I/O Bus A Bus B
De s cription Select Inputs
PS8180A
08/21/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16212 PI3B162212 3.3V, 24-Bit Bus-Exchange Switch
Maximum Ratings
(Above which 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 Range .................................................... 0.5V to +4.6V DC Input Voltage ............................................................ 0.5V to +4.6V 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 = 3.0V to 3.6V)
Parame te rs VIH VIL II IOZH VIK RON D e s cription Input HIGH Voltage Input LO W Voltage Input Current Te s t Conditions (1) Guaranteed Logic High Level Guaranteed Logic Low Level VCC = Max., VIN = VCC or GND VCC = 0, VIN = VCC VCC = Min., IIN = 18mA VCC = Min., VIN = 0.0V, ION = 64mA VCC = Min., VIN = 2.4V, ION = 15mA 16212 162212 16212 162212 20 20 0.7 5 28 10 35 M in. 2.0 0.5 0.8 1 10 1 1.2 8 40 15 48 V A Typ.(2) M ax. Units V
High Impedance O utput Current 0 A, B VCC, Switches O ff Clamp Diode Voltage Switch O N Resistance(3)
Capacitance (TA = 25C, f = 1 MHz)
Parame te rs (4) CIN C O FF CON D e s cription Input Capacitance A/B Capacitance, Switch O ff A/B Capacitance, Switch O n VIN = 0V Te s t Conditions Typ 3.0 14.0 30.0 pF Units
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, 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.
2
PS8180A
08/21/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16212 PI3B162212 3.3V, 24-Bit Bus-Exchange Switch
Power Supply Characteristics
Parame te rs ICC ICC ICCD De s cription Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max. VCC = Max. VCC = Max., VIN = 3V, A & B Pins Open Control Input Toggling, 50% Duty Cycle Te s t Conditions (1) VIN = GND or VCC VIN = 3.0V(3) M in. Typ(2) M ax. 10 A 750 0.25 mA/ MHz Units
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for applicable device. 2. Typical values are at VCC = 3.3V, +25C ambient. 3. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. 4. Per TTL driven input (control inputs only); A and B pins do not contribute to ICC. 5. 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.
PI3B16212 Switching Characteristics over Operating Range
PI3B16212 Com. Parame te rs tPLH tPHL tPZH tPZL tPHZ tPLZ De s cription Propagation Ax to Bx, Bx to Ax Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx Delay(2,3) Conditions (1) CL = 50pF, RL = 500 ohms CL = 50pF, RL = 500 ohms R = 500 ohms 16212 162212 M ax. 1 1 M in. 0.25 1.25 4.5 5.0 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
PS8180A
08/21/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16212 PI3B162212 3.3V, 24-Bit Bus-Exchange Switch
56-Pin TSSOP (A) Package
56-Pin SSOP (V) Package
56
.291 .299 7.39 7.59
.396 .416 10.06 10.56 Gauge Plane .010 0.25 .02 .04 0.51 1.01
1 .720 18.29 .730 18.54 .015 0.381 x 45 .025 0.635
.008 0.20 Nom.
.110 2.79 Max .025 BSC 0.635 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .008 .0135 0.20 0.34 .008 0.20 .016 0.40
0-8
Ordering Information
Part PI3B16212A PI3B16212V Pin 56 Package TSSOP SSO P Width 240- mil 300- mil Te mpe rature 40C to 85C
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
4
PS8180A 08/21/01

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