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Logic Block Diagram
A0 C0
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PI5C3400 4-BIT, 4-PORT BUS EXCHANGE SWITCH
PI5C3400
4-Bit, 4-Port Bus Exchange Switch
Product Features:
* Zero propagation delay * Zero ground bounce in flow-through mode * 5 switches connect inputs to outputs * Direct bus connection when switches are ON * Ultra Low Quiescent Power (0.2 A Typical) - Ideally suited for notebook applications * Packages available: - 24-pin 300 mil wide plastic PDIP (P) - 24-pin 150 mil wide plastic QSOP (Q) - 24-pin 300 mil wide plastic SOIC (S)
Product Description:
Pericom Semiconductor's PI5C series of logic circuits are produced in the Company's advanced 0.8 micron CMOS technology, achieving industry leading speed grades. The PI5C3400 is a 4-bit, 4-port bus switch with individual exchanges designed with a low ON resistance (5) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or ground bounce noise. The switches are turned ON by the Bus Enable (BE) input signal, and the Bus Exchange (BX0-BX3) input signals offer individual bit swapping of the AB and CD signal pairs. This exchange configuration allows bit swapping of buses in systems.
Product Pin Configuration
B0
D0
A1 B1
C1 D1
A2 B2
C2 D2
A3 B3
C3 D3
BE C0 A0 B0 D0 C1 A1 B1 D1 BX0 BX1 GND
1 2 3 4 5 6 7 8 9 10 11 12
24-PIN P Q S
24 23 22 21 20 19 18 17 16 15 14 13
Vcc D3 B3 A3 C3 D2 B2 A2 C2 NC BX3 BX2
BX0 BX1 BX2 BX3 BE
Truth Table(1)
Function Disconnect Connect Exchange BE H L L BX0 X BX1 BX2 X X BXi = L BXi = H BX3 X A0-3 Hi-Z C0-3 D0-3 B0-3 Hi-Z D0-3 C0-3 Note: 1. H X L Hi-Z i = High Voltage Level = Don't Care = Low Voltage Level = High Impedance = 0, 1, 2, or 3
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PI5C3400 4-BIT, 4-PORT BUS EXCHANGE SWITCH
Product Pin Description
Pin Name BE Ax, Bx, Cx, Dx BX0 BX1 BX2 BX3 NC GND VCC Description Bus Enable Input (Active LOW) Bus A, Bus B, Bus C, Bus D Bus Exchange (Bit 0) Bus Exchange (Bit 1) Bus Exchange (Bit 2) Bus Exchange (Bit 3) No Connect Ground Power
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 +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) .. -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.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5V 5%)
Parameters Description VIH VIL IIH IIL IOZH VIK IOS VH RON Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current
(3)
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., IIN = -18 mA A (B) = 0V, B (A) = VCC
Min. 2.0 -0.5
Typ(2)
Max. 0.8 1 1 1
Units V V A A A V mA mV
-0.7 100 150
-1.2
Input Hysteresis at Control Pins Switch On Resistance(4) VCC = Min., VIN = 0.0V, ION = 48 mA VCC = Min., VIN = 2.4V, ION = 15 mA
5 10
7 15
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 Max. 6 6 8 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 = 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.
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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.
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 0.25 ns for 50 pF 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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PI5C3400 4-BIT, 4-PORT BUS EXCHANGE SWITCH
Power Supply Characteristics
Parameters Description ICC ICC ICCD Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open BE = GND Control Input Toggling 50% Duty Cycle Test Conditions(1) VIN = GND or VCC VIN = 3.4V(3) Min. Typ(2) 0.1 Max. 3.0 2.5 0.25 Units A mA mA/ MHz
Switching Characteristics over Operating Range
PI5C3400 Com.
(1)
Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ tBX
Description Propagation Delay(2,3) Ax to Cx, Bx to Dx Bus Enable Time BE to Cx or Dx Bus Disable Time BE to Cx or Dx Bus Exchange Time BXX to Cx or Dx
Conditions CL = 50 pF RL = 500
Min.
Max.
Unit
0.25 1.5 1.5 1.5 6.5 5.5 6.5
ns ns ns ns
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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