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PI3C16226
3.3V, High-Bandwidth, 12-Bit to 24-Bit, Mux/Demux Bus Switch
Product Features
* * * * * * * * * RON is 9-Ohm typical Pulldown on B ports Industrial Operation Temperature: 40C to +85C Near Zero propagation delay Switching speed: 4.5ns max. Channel on capacitance: 9pF max. (3.3V operation) VCC Operating Range: +2V to +3.6V >100 MHz bandwidth Package available: 40-pin BQSOP (B)
Product Description
Pericom Semiconductors PI3C series of bus switch circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. PI3C16226 is a 12-to 24-bit multiplexer/demultiplexer bus switch. Industry leading advantages include a zero propagation delay of 500ps, resulting from 9-ohm channel resistance and low I/O capacitance. A1 port demultiplexes to either 1B or 2B and the switch is bidirectional.
Application
Provides Memory Module switching.
Logic Block Diagram
1A1 1B1
Pin Description
1A1 2B1 2B2
1B2
12A1
12B1
12B2
SEL
Function nA1 to nB1 nA1 to nB2
SEL L H
3A1 GND 4B1 4B2 5A1 6B1 6B2 7A1 V CC 8B1 8B2 9A1 10 B 1 10 B 2 11 A 1 12 B 1 12 B 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
40-Pin B
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21
SEL 1B 1 1B 2 2A 1 3B 1 3B 2 4A 1 5B 1 5B 2 6A 1 7B 1 7B 2 8A 1 GND 9B 1 9B 2 10A 1 11B 1 11B 2 12A 1
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PS8457D
03/13/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C16226 3.3V, High Bandwidth, 12-Bit to 24-Bit, Mux/Demux Bus 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 (Inputs & Vcc Only) ...... 0.5V to +4.6V Supply Voltage to Ground Potential (Outputs & D/O Only) ... 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 VIK IO D e s cription Input HIGH Voltage Input LO W Voltage Input HIGH Current Input LO W Current Clamp Diode Voltage B port pulldown Current Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LO W Level VC C = Max., VIN = VC C VC C = Max., VIN
=
M in. 2.0 0.5 2.5
Typ.(2) 0.73 3.8 9 16
M ax. 0.8 1 1 1.2 12
Units V A V mA
GND
VC C = Min., IIN = 18mA VC C = Min., VO = VC C SEL = High for B1 SEL = Low for B2 VC C = Min., VIN = 0.0V IO N = 48mA or 64mA VC C = Min., VIN = 2.4V IO N = 15mA
RO N
Switch O n
Resistance(4)
23
Capacitance (TA = 25C f = 1 MHz)
Parame te rs (5) CIN CON D e s cription Input Capacitance A/B Capacitance, Switch O n Te s t Conditions VIN = 0V Typ. 3.5 9.3 M ax. 11 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. 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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PI3C16226 3.3V, High Bandwidth, 12-Bit to 24-Bit, Mux/Demux Bus Switch
Power Supply Characteristics
Parame te rs ICC ICC De s cription Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Te s t Conditions (1) VCC = Max., VIN = GND or VCC VCC = Max., VIN = 3.0V(3) M in. Typ.(2) 260 M ax. 850 750 Units A
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. 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.
PI3C16226 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 SEL to Ax or Bx Bus Disable Time SEL to Ax or Bx Conditions (1) CL = 25pF RL = 500 CL = 25pF RL = 500 R = 500 Com. M in. 1.3 1.3 M ax. 0.5 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 0.5ns for 25pF 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
PS8457D
03/13/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C16226 3.3V, High Bandwidth, 12-Bit to 24-Bit, Mux/Demux Bus Switch
40-Pin BQSOP (B) Package
X.XX X.XX
DENOTES DIMENSION IN MILLIMETERS
Notes: 1. Controlling dimensions in millimeters 2. Ref.: JEDEC MO - 154 BB
Ordering Information
Part PI3C16226B Pin - Pack age 40 - BQ SO P (B) 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
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PS8457D 03/13/01

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