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PI3B34X245
3.3V, 32-Bit, 2-Port NanoSwitch
Product Features
Fast Switching Speed - 4.5ns max. Near-zero propagation delay 5 Ohm switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power (1.0A typical) Ideally suited for notebook applications Industrial operating temperature: 40C to +85C TTL - compatible control of input levels Package available: 80-pin, 150-mil wide plastic BQSOP (B)
Product Description
Pericom Semiconductors PI3B series of logic circuits are produced in the companys advanced submicron CMOS technology. The PI3B34X245 is a 3.3V, 32-bit, 2-port bus switch. Four enable signals (BEn) turn the switches on. The bus switch creates no additional propagational delay or additional ground bounce noise.
Product Pin Configuration
NC A0 A1 A2 A3 A4 A5 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 29 30 31 32 33 34 35 36 37 38 39 40 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 80-PIN 64 B 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 VCC BE1 B0 B1 B2 B3 B4 B5 B6 B7 VCC BE2 B8 B9 B10 B11 B12 B13 B14 B15 VCC BE3 B16 B17 B18 B19 B20 B21 B22 B23 VCC BE4 B24 B25 B26 B27 B28 B29 B30 B31
Logic Block Diagram
A0 A7 BE1 A8 A15 BE2 A16 A23 BE3 A24 A31 BE4
SW SW SW
SW
B0 B7
A6 A7 GND NC A8 A9 A10 A11 A12 A13 A14 A15 GND NC A16 A17 A18 A19 A20 A21 A22 A23
SW
B8 B15
SW
B16 B23
SW
B24
SW
GND NC A24 A25 A26 A27 A28 A29 A30 A31 GND
SW
B31 A B
BE
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PS8335B
02/26/02
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PI3B34X245 3.3V, 32-Bit, 2-Port NanoSwitch
Truth Table(1)
Function Disconnect Connect BEn H L A031 Hi-Z B031
Notes: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
Product Pin Description
Pin Name BEn A0-A31 B0-B31 I/O I
I/O I/O
Description Bus Enable Input (Active LOW) Bus A Bus B
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 +7.0V DC Input Voltage ........................................................................ 0.5V to +7.0V 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 IOZH VIK RON De s cription Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedence Output Current Clamp Diode Voltage Switch On Resistance Te s t Conditions Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., INN = -18mA VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA M in. 2.0 -0.5 Typ. 5 10 -0.8 8 17 V 1 M ax. 0.8 Units V
Capacitance (TA = 25C, f = 1 MHz)
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. 3.5 8.0 16.0 Units pF pF 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.
2
PS8335B
02/26/02
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B34X245 3.3V, 32-Bit, 2-Port NanoSwitch
Power Supply Characteristics
Parame te rs 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 M in. Typ.(2) 1.0 M ax. 10 A CC VCC = Max. VIN = 3.0V(3) 750 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, +25C ambient. 3. Per TTL driven input (control input 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.
Switching Characteristics over Operating Range
PI3B34X245 Parame te rs D e s cription Conditions (1) Com. M in. tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation Delay (2,3) Ax to Bx, Bx to Ax Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx CL = 50pF RL = 500 CL = 50pF RL = 500 R = 500 1.0 1.0 M ax. 0.25 4.0 4.5 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.
3
PS8335B
02/26/02
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B34X245 3.3V, 32-Bit, 2-Port NanoSwitch
Packaging Mechanical: 80-pin BQSOP (B)
80
41
.150 .157 3.80 4.00
.228 .244 5.80 6.20
.008 NOM 0.203 Gauge Plane 5
1 0.803 0.811 20.40 20.60
40
.019 0.50 .029 0.75
.010 0.254 BSC
0.50 .019 REF
.010 .016 .063 1.60 Nom .078 2.0 Max
0.254 x 45 0.406
.0197 BSC 0.50
.007 .010 0.17 0.27
5 .002 .009 0.05 0.25
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
Ordering Information
Orde ring Code PI3B34X245B Package Type 80- pin, 150- mil wide plastic BQSO P
Applications Information
Logic Inputs The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a + 3.3V supply, IN may be driven low to 0V and high to 3.6V. Driving IN Rail-to-Rail(R) minimizes power consumption. Power-Supply Sequencing and Hot-Plug Information Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC and GND before applying signals to input/output or control pins.
Rail-to-Rail is a registeredtrademark of Nippon Motorola, Ltd.
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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PS8335B 02/26/02

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