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PI3C16212
3.3V, High Bandwidth, 24-Bit Bus Exchange Switch
Product Description
Pericom Semiconductors PI3C series of bus switch circuits are produced using the Companys advanced submicron CMOS technology.
Product Features
Near-zero propagation delay 6 switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power (0.2mA typical) Ideally suited for notebook applications Industrial operating temperature: 40C to +85C Packages available: 56-pin 240-mil wide thin plastic TSSOP (A)
The PI3C16212 is 24-bit bus exchange switch designed with a low ON resistance allowing inputs to be connected directly to outputs. This device operates as a 24-bit bus switch or a 12-bit exchanger, which provides data exchanging between the four signal ports via the data select pins (S0-S2).
Logic Block Diagram
ONE OF TWELVE CHANNELS 1A1 1B1
Product Pin Configuration
S0
1A1 1A2 2A 1 2A2 3A1
1A2
1B2
3A2
GND 4A1
4A2 5A1 5A2 6A1 6A2 7A1 7A2
FLOW CONTROL S0 S1 S2
VCC 8A1
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
GND
8A2 9A1 9A2 10A1 10A2 11 A1 11 A2 12A1 12A2
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 1B 2 2B1 2B 2 3B1
GND
3B 2 4B1 4B 2 5B1 5B 2 6B1 6B 2 7B1 7B 2 8B 1
56-Pin A
46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
GND
8B 2 9B1 9B 2 10B1 10B2 11 B1 11 B2 12B1 12B2
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
Description Select Inputs Bus A Bus B
PS8454C 01/11/02
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PI3C16212 3.3V, High Bandwidth 24-Bit Bus Exchange Switch
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 .......................................... 0.5V to +4.6V DC I/O Voltage .......................................................................... 0.5V to +5.5V 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 = 3.3V 10%)
Parame te rs VIH VIL IIH IIL IO ZH VIK De s cription Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High- Impedence Output Current Clamp diode Voltage 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 or 64mA VC C = Min.,VIN = 2.4V IO N = 15mA M in. 2.0 0.5 Typ.(2 ) 0.73 6.5 10 M ax. 0.8 1 1 1 1.2 8.5 15 V A Units V
RO N
Switch On
Resistance(4 )
Capacitance (TA = 25C f = 1 MHz)
Parame te rs (5) CIN C O FF CON De s cription Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Te s t Conditions Typ. 3.5 4.0 12.0 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 = 3.3V, 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 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.
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PI3C16212 3.3V, High Bandwidth 24-Bit Bus Exchange Switch
Power Supply Characteristics
Parame te rs ICC ICC D e s cription Q uiescent Power Supply Current Supply Current per Input @ TTL HIGH Te s t Conditions (1) VCC = Max., VIN = GND or VCC VCC = Max., VIN
=
M in.
Typ.(2) 260
M ax. 850 750
Units A
3.0V(3)
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.
PI3C16212 Switching Characteristics Over Operating Range
Parame te rs tPLH tPHL tPZH tPZL tPHZ tPLZ De s cription Propogation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time Sn to Ax or Bx Bus Disable Time Sn to Ax or Bx Conditions (1) CL = 50pF RL = 500 CL = 50pF RL = 500 Com. M in. 1.5 1.5 M ax. 0.50 6.5 5.5 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.
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PS8454C
01/11/02
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PI3C16212 3.3V, High Bandwidth 24-Bit Bus Exchange Switch
56-Pin TSSOP (A) Package
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 PI3C16212A Pin - Package 56 - TSSO P (A) Width 240- mil Te mpe rature 0C to 85C
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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PS8454C 01/11/02

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