QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 10-BIT BUS SWITCHES QS3384 QS32384 FEATURES/BENEFITS DESCRIPTION * * * * * * * The QS3384 and QS32384 provide a set of ten high-speed CMOS, TTL-compatible bus switches. The low ON resistance of QS3384 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce. Two banks of 5 switches are controlled by independent Bus Enable (BE) signals. The QS32384 adds an internal series resistor with each switch to reduce reflection noise in high speed applications. When closed, the switch acts as the source (series) termination for the driver connected to it. Enhanced N channel FET with no inherent diode to VCC bidirectional switches connect inputs to outputs 5 Zero propagation delay (QS3384), zero ground bounce Undershoot clamp diodes on all switch and control pins version for low noise QS32384 is 25 Two enables control five bits each Available in TSSOP, SOIC, QSOP AND HQSOP APPLICATIONS * Hot-swapping, hot-docking (Application Note AN-13) * Voltage translation (5V to 3.3V; Application Note AN-11) * Power conservation * Capacitance reduction and isolation * Bus isolation * Clock gating FUNCTIONAL BLOCK DIAGRAM A0 B0 A4 B4 A5 B5 A9 B9 BEA BEB JULY 1999 1 1999 Integrated Device Technology, Inc DSC-XXXXXX QS3384 AND QS32384 IDT PIN CONFIGURATION PIN DESCRIPTION (ALL PINS TOP VIEW) Name I/O Function A0-A9 I/O Bus A B0-B9 I/O Bus B BEA, BEB I TSSOP, SOIC, QSOP, HQSOP BEA B0 A0 A1 B1 B2 A2 A3 B3 B4 A4 GND Bus Switch Enable FUNCTION TABLE BEA BEB B0-B4 B5-B9 H H Hi-Z Hi-Z Disconnect L H A0-A4 Hi-Z Connect H L Hi-Z A5-A9 Connect L L A0-A4 A5-A9 Connect Function 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC B9 A9 A8 B8 B7 A7 A6 B6 B5 A5 BEB ABSOLUTE MAXIMUM RATINGS Supply Voltage to Ground ........................................................................ -0.5V to 7.0V DC Switch Voltage VS .............................................................................. -0.5V to 7.0V DC Input Voltage VIN ................................................................................ -0.5V to 7.0V AC Input Voltage (for a pulse width 20ns) .......................................................... -3.0V DC Output Current Max. Sink Current/Pin ........................................................... 120mA Maximum Power Dissipation ............................................................................ 0.5 watts TSTG Storage Temperature ...................................................................... -65 to 150C Note: ABSOLUTE MAXIMUM CONTINUOUS RATINGS are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute-maximum conditions is not implied. CAPACITANCE TA = 25C, f = 1MHz, VIN = 0V, VOUT = 0V Pins SOIC, QSOP Typ Max Unit Control Inputs 3 5 pF QuickSwitch Channels (Switch OFF) 5 7 pF Note:Capacitance is guaranteed but not production tested. For total capacitance while the switch is ON, please see Section 1 under "Input and Switch Capacitance." 2 1999 Integrated Device Technology, Inc DSC-XXXXXX IDT QS3384 AND QS32384 DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Commercial: TA = -40C to 85C, VCC = 5.0V 5% Symbol Military: TA = -55C to 125C, VCC = 5.0V 10% Parameter Test Conditions Min Typ(1) Max Unit VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Inputs 2.0 -- -- V VIL Input LOW Voltage Guaranteed Logic LOW for Control Inputs -- -- 0.8 V Input Leakage Current 0 VIN VCC -- 0.01 1 A | IIN | (Control Inputs) | IOZ | Off-State Current (Hi-Z) 0 VOUT VCC, Switches OFF -- 0.01 1 A RON (2) Switch ON Resistance VCC = Min., VIN = 0.0V ION = 30mA 3384 (Com) 3384 (Mil) 32384 (Com) 32384 (Mil) -- -- 20 -- 5 10 28 35 7 15 40 45 RON Switch ON Resistance(2) VCC = Min., VIN = 2.4V ION = 15mA 3384 (Com) 3384 (Mil) 32384 (Com) 32384 (Mil) -- -- 20 -- 10 15 35 40 15 20 48 55 VP Pass Voltage(3) VIN = VCC = 5V, IOUT = -5A 3.7 4 4.2 V Notes: 1. Typical values indicate VCC = 5.0V and TA = 25C. 2. For a diagram explaining the procedure for RON measurement, please see Section 1 under "DC Electrical Characteristics." Max. value of RON guaranteed, but not production tested. 3. Pass Voltage is guaranteed but not production tested. TYPICAL ON RESISTANCE VS VIN AT VCC = 5.0V (QS3384) RON (ohms) 16 14 12 10 8 6 4 2 0 0.0 0.5 1.5 1.0 2.0 2.5 3.0 3.5 VIN (Volts) Note: For QS32384, add 23 to RON shown. 3 1999 Integrated Device Technology, Inc DSC-XXXXXX QS3384 AND QS32384 IDT POWER SUPPLY CHARACTERISTICS OVER OPERATING RANGE Commercial: TA = -40C to 85C, VCC = 5.0V 5% Symbol Military: TA = -55C to 125C, VCC = 5.0V 10% Parameter Test Conditions(1) Max Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 1.5 mA ICC Power Supply Current per Input HIGH(2) VCC = Max., VIN = 3.4V, f = 0 per Control Input 2.5 mA QCCD Dynamic Power Supply Current per MHz(3) VCC = Max., A and B Pins Open, Control Inputs Toggling @ 50% Duty Cycle 0.25 mA/ MHz Notes: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC specifications. 2. Per TTL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ICC. 3. This current applies to the control inputs only and represents 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 guaranteed by characterization, but not production tested. SWITCHING CHARACTERISTICS OVER OPERATING RANGE Commercial: TA = -40C to 85C, VCC = 5.0V 5% CLOAD = 50pF, RLOAD = 500 unless otherwise noted. Military: TA = -55C to 125C, VCC = 5.0V 10% QS3384 Symbol Description(1) QS32384 Min Typ Max Min Typ Max Unit tPLH tPHL Data Propagation Delay(2,4) Ai to Bi, Bi to Ai COM MIL -- -- -- -- 0.25(3) 0.75(3) -- -- -- -- 1.25(3) 1.75(3) ns tPZL tPZH Switch Turn-on Delay BEA, BEB to Ai, Bi COM MIL 1.5 1.5 -- -- 6.5 7.5 1.5 1.5 -- -- 7.5 8.5 ns tPLZ tPHZ Switch Turn-off Delay(2) BEA, BEB to Ai, Bi COM MIL 1.5 1.5 -- -- 5.5 6.5 1.5 1.5 -- -- 5.5 6.5 ns Notes: 1. See Test Circuit and Waveforms. Minimums guaranteed but not production tested. 2. This parameter is guaranteed by but not production tested. 3. The time constant for the switch alone is of the order of 0.25ns for QS3384 and 1.25ns for QS3284 for C L = 50pF. 4. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagation delay to the system. Propagation 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. CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. The IDT logo is a registered trademark of Integrated Device Technology, Inc. 4 1999 Integrated Device Technology, Inc DSC-XXXXXX