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| IDTQS316212 HIGH-SPEED CMOS 24-BIT BUS-EXCHANGE SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH(R) PRODUCTS HIGH-SPEED CMOS 24-BIT BUS-EXCHANGE SWITCH FEATURES: * * * * * IDTQS316212 Enhanced N channel FET with no inherent diode to Vcc Low propagation delay TTL-compatible input and output levels Undershoot clamp diodes on all switch and control inputs Available in SSOP and TSSOP packages DESCRIPTION: APPLICATIONS: * * * * The QS316212 provides a set of 24 high-speed CMOS TTL-compatible bus-exchange switches. The low ON resistance of the QS316212 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The device operates as a 24-bit bus switch or a 12-bit bus exchanger, which provides data exchanging between the four signal ports through the data-select (S0-S2) terminals. The QS316212 is characterized for operation at -40C to +85C. Resource sharing Crossbar switching Hot-docking Voltage translation (5V to 3.3V) FUNCTIONAL BLOCK DIAGRAM 1 of 12 Chann els 1A1 1B1 1A2 1B2 Flow Control S0 S1 S2 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE 1 c 1999 Integrated Device Technology, Inc. NOVEMBER 1999 DSC-5569/1 IDTQS316212 HIGH-SPEED CMOS 24-BIT BUS-EXCHANGE SWITCH INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION S0 1A1 1A2 2A1 2A2 3A1 3A2 GND 4A1 4A2 5A1 5A2 6A1 6A2 7A1 7A2 V CC 8A1 GND 8A2 9A1 9A2 10A1 10A2 11A1 11A2 12A1 12A2 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 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 S1 S2 1B1 1B2 2B1 2B2 3B1 GND 3B2 4B1 4B2 5B1 5B2 6B1 6B2 7B1 7B2 8B1 GND 8B2 9B1 9B2 10B1 10B2 11B1 11B2 12B1 12B2 ABSOLUTE MAXIMUM RATINGS(1) Symbol VTERM(2) VTERM(3) VTERM(3) VAC IOUT PMAX TSTG Description Supply Voltage to Ground DC Switch Voltage VS DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current Maximum Power Dissipation (TA = 85C) Storage Temperature SSOP TSSOP Max -0.5 to +7 -0.5 to +7 -0.5 to +7 -3 120 0.93 0.77 -65 to +150 C Unit V V V V mA W NOTES: 1. Stresses greater than those listed under ABSOLUTE 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. 2. VCC terminals. 3. All terminals except VCC . CAPACITANCE (TA = +25C, f = 1MHz, VIN = 0V, VOUT = 0V) Pins Control Inputs Quickswitch Channels (Switch OFF) Typ. 4 7.5 Max. (1) 5 9 Unit pF pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names 1Ax 1Bx I/O I/O I/O I Bus A Bus B Data Select Description - 12Ax 12Bx S0 - S2 FUNCTION TABLE(1) S2 S1 L L H H L L H H S0 L H L H L H L H xA1 Z xB1 xB2 Z Z Z xB1 xB2 xA2 Z Z Z xB1 xB2 Z xB2 xB1 Function Disconnect xA1 to xB1 xA1 to xB2 xA2 to xB1 xA2 to xB2 Disconnect xA1 to xB1, xA2 to xB2 xA1 to xB2, xA2 to xB1 L L L L H H H H SSOP/ TSSOP TOP VIEW NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance 2 IDTQS316212 HIGH-SPEED CMOS 24-BIT BUS-EXCHANGE SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5V 10% Symbol VIH VIL IIN IOZ RON VP Parameter Input HIGH Voltage Input LOW Voltage Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Switch ON Resistance(2) Pass Voltage(3) Test Conditions Guaranteed Logic HIGH for Control Inputs Guaranteed Logic LOW for Control Inputs 0V VIN VCC 0V VOUT VCC, Switches OFF VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION = 15mA VIN = VCC = 5V, IOUT = -5A Min. 2 -- -- -- -- -- 3.7 Typ.(1) Max. -- -- -- -- 5 10 4 -- 0.8 1 1 7 12 4.2 V Unit V V A A NOTES: 1. Typical values are at VCC = 5V and TA = 25C. 2. RON is guaranteed but not production tested. 3. Pass voltage is guaranteed but not production tested. TYPICAL ON RESISTANCE vs VIN AT VCC = 5V 16 RON (ohms) 14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VIN (Volts) 3 IDTQS316212 HIGH-SPEED CMOS 24-BIT BUS-EXCHANGE SWITCH INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current per Control Input HIGH(2) Dynamic Power Supply Current per MHz (3) Test Conditions(1) VCC = Max., VIN = GND or VCC, f = 0 VCC = Max., VIN = 3.4V, f = 0 VCC = Max., A and B Pins Open, Control Inputs Toggling @ 50% Duty Cycle Max. 3 2.5 0.25 Unit A mA mA/MHz NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TTL-driven input (VIN = 3.4V). 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 but not production tested. SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40C to +85C, VCC = 5V 10% CLOAD = 50pF, RLOAD = 500 unless otherwise noted. Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ Parameter Data Propagation Delay(2) xAx to xBx, xBx to xAx Switch Turn-On Delay Sx to xAx, xBx Switch Turn-Off Delay(2) Sx to xAx, xBx 1.5 1.5 6.5 6.2 ns ns Min. (1) Typ. Max. 0.25(3) Unit ns NOTES: 1. Minimums are guaranteed but not production tested. 2. This parameter is guaranteed but not production tested. 3. The bus switch contributes no propagation 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 at CL = 50pF. Since this time constant is much smaller than the rise and 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. 4 IDTQS316212 HIGH-SPEED CMOS 24-BIT BUS-EXCHANGE SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package X Process Blank Industrial (-40C to +85C) PV PA Shrink Small Outline Package Thin Shrink Small Outline Package 316212 High Speed CMOS 24-Bit Bus-Exchange Switch 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 for Tech Support: logichelp@idt.com (408) 654-6459 5 |
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