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PI5C34X245
32-Bit, 2-Port Bus Switch
Features
* * * *
Near-Zero propagation delay 5 switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power (0.2A typical) - Ideally suited for notebook applications * Pin compatible with QS32X245 * Industrial operating temperature: -40C to +85C * Packaging (Pb-free & Green available): - 80-pin BQSOP (B) - 80-pin DFN (ZA)
Description
Pericom Semiconductor's PI5C series of logic circuits are produced in the Company's advanced submicron CMOS technology. The PI5C34X245 is a 32-bit, 2-port bus switch. Two enable signals (BEn) turn the switches on. The bus switch creates no additional propagational delay or additional ground bounce noise.
Block Diagram
A0 B0
Pin Configuration
NC A0 A1 A2 A3 A4 A5 A6 A7 GND NC A8 A9 A10 A11 A12 A13 A14 A15 GND NC A16 A17 A18 A19 A20 A21 A22 A23 GND NC A24 A25 A26 A27 A28 A29 A30 A31 GND
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 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
A7 BE1 A8
B7
B8
A15 BE2 A16
B15
B16
A23 BE3 A24
B23
B24
A31 BE4
B31
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
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PI5C34X245 32-Bit, 2-Port BusSwitch 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............................................................................120 mA 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.
Truth Table(1)
Function Connect
Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
Pin Description
BEn H L A0-A31 Hi-Z B0-31 Pin Name BEX A0-A31 B0-B31 I/O I I/O I/O Description Bus Enable Input (Active LOW) Bus A Bus B
Disconnect
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5V 10%)
Parameters VIH VIL IIH IIL IOZH VIK IOS VH RON Description Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current(3) Input Hystersis at Control Pins Switch On-Resistance(4) VCC = Min., VIN = 0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA -- -- Test Conditions(1) Min. 2.0 -0.5 -- -- -- -- 100 Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 - A, B - VCC VCC = Min., IIN = -18mA A (B) = 0V, B (A) = VCC
Typ(2) -- -- -- -- -- -0.7 -- 5 10
Max. -- 0.8 1 1 1 -1.2 -- 7 15
Units V
A V mA
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PI5C34X245 32-Bit, 2-Port BusSwitch Capacitance (TA = 25C, f = 1 MHz)
Paramaters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch OFF A/B Capacitance, Switch ON VIN = 0V Test Conditions Max. 6 6 12 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 = 5.0V, 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.
Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4)
Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., A & B Pins Open BEn = GND, Control Input Toggling 50% Duty Cycle VIN = GND or VCC VIN = 3.4V(3)
Min. Typ(2) Max. -- -- 0.1 -- 3.0 2.5
Units A mA
ICCD
--
--
0.25
mA/ MHz
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V, 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.
Switching Characteristics over Operating Range
PI5C34X245 Parameter tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2,3) AX to Bx, Bx to Ax Bus Enable Time BEx to Ax or Bx Bus Disable Time BEx to Ax or Bx CL = 50pF RL = 500 1.5 1.5 Conditions(1) Min. Com. Max. 0.25 5.6 5.2 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
PS7058F
08/2/04
PI5C34X245 32-Bit, 2-Port BusSwitch Packaging Mechanical: 80-Pin, 150 Mil Wide Plastic BQSOP (B)
80 41
.150 .157 3.80 4.00
.228 .244 5.80 6.20
.008 NOM 0.203
Gauge Plane
5
1
40
0.50 .019 REF
0.803 0.811 20.40 20.60
.019 0.50 .029 0.75
.010 0.254 BSC
.010 .016 .063 1.60 Nom
.007 .010 0.17 0.27
.078 2.0 Max
0.254 x 45 0.406
5
.002 .009 0.05 0.25
.0197 BSC 0.50
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
Packaging Mechanical: 80-Pin, Plastic Very Fine Pitch Dual Flat No-lead DFN (ZA)
.033 0.84 MAX
.020 0.50 BSC
.00 .0016 0.00 STANDOFF 0.04
LEAD THICKNESS
.008 0.20 NOM
.232 .240 5.90 6.10
.007 .011 0.17 0.27
0.10 M C A B
.803 .811 20.40 20.60
.115 2.925 NOM 2 PLACES
.033 0.85 NOM
2 PLACES
.014 .016 0.35 4 PLACES .040
.035 0.90 NOM
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PI5C34X245 32-Bit, 2-Port BusSwitch Ordering Information
Ordering Code PI5C34X245B PI5C34X245BE PI5C34X245ZA PI5C34X245ZAE Packaging Code B B ZA ZA Package Type 80-Pin 150 Mil Wide Plastic BQSOP Pb-free & Green, 80-Pin 150 Mil Wide Plastic BQSOP 80-Pin Plastic Very Fine Pitch Dual Flat No lead (DFN) Pb-free & Green, 80-Pin Plastic Very Fine Pitch Dual Flat No lead (DFN)
Notes: 1. This product has always shipped as only a lead free product, but since it was introduced prior to Pericom's strategy of adding an E to all Green/ Lead free parts many customers order it without the E suffix. Please migrate new designs and qualification to include the E suffix. Pericom at this point in time will continue to offer devices marked both ways, but may at a later date eliminate the non-E part number. 2. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ 3. Number of transistors = TBD
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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PS7058F 08/2/04

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