IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS 24-BIT BUS SWITCH FEATURES: • • • • • • DESCRIPTION: Enhanced N channel FET with no inherent diode to Vcc Ω bidirectional switches connect inputs to outputs 5Ω Zero propagation delay, zero ground bounce TTL-compatible input and output levels Undershoot clamp diodes on all switch and control inputs Available in SSOP and TSSOP packages The QS316211 provides a set of 24 high-speed CMOS TTL-compatible bus switches. The low ON resistance of the QS316211 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. When 1OE is low, 1An is connected to 1Bn. When 2OE is low, 2An is connected to 2Bn. The QS316211 is ideal for switching wide digital buses, 5V to 3.3V translation, and for hot plug buffering. The QS316211 is characterized for operation at -40°C to +85°C. APPLICATIONS: • • • • • • • IDTQS316211 Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Logic replacement (data processing) Power conservation Capacitance reduction and isolation Bus isolation Clock gating FUNCTIONAL BLOCK DIAGRAM 1A1 1B1 1A12 1B12 1OE 2A1 2B1 2A12 2B12 2OE The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE NOVEMBER 1999 1 c 1999 Integrated Device Technology, Inc. DSC-5570/2 IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS(1) NC 1 56 1A 1 2 55 1OE 2OE Symbol Description VTERM(2) Max Unit VTERM(3) Supply Voltage to Ground –0.5 to +7 V DC Switch Voltage VS –0.5 to +7 V VTERM(3) DC Input Voltage VIN –0.5 to +7 V VAC AC Input Voltage (pulse width ≤20ns) –3 V 1A 2 3 54 1B1 IOUT DC Output Current 120 mA 1A 3 4 53 1B2 PMAX Maximum Power Dissipation (TA = 85°C) 0.93 W 1A 4 5 52 1B3 TSTG Storage Temperature –65 to +150 °C 1A 5 6 51 1B4 1A 6 7 50 1B5 GND 8 49 GND 1A 7 9 48 1B 6 1A 8 10 47 1B7 1A 9 11 46 1B8 1A10 12 45 1B9 1A11 13 44 1B10 1A12 14 43 1B11 2A 1 15 42 1B12 2A 2 16 41 2B 1 VCC 17 40 2B 2 2A 3 18 39 2B 3 GND 19 38 GND 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 = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V) Pins Typ. Max. (1) Unit Control Inputs 4.5 6 pF Quickswitch Channels (Switch OFF) 5.5 7 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names I/O xA1 - xA12 I/O Bus A Description xB1 - xB12 I/O Bus B 1OE - 2OE I Data Select 2A 4 20 37 2B 4 2A 5 21 36 2B 5 2A 6 22 35 2B 6 2A 7 23 34 2B 7 2A 8 24 33 2B 8 1OE 2OE xA xY 2A 9 25 32 2B 9 L L 1 Bx 2 Bx 1Ax to 1Bx, 2Ax to 2Bx 2A10 26 31 2B10 L H 1 Bx Z 1Ax to 1Bx 2A11 27 30 2B11 H L Z 2 Bx 2Ax to 2Bx 2A12 28 29 2B12 H H Z Z FUNCTION TABLE(1) NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance SSOP/ TSSOP TOP VIEW 2 Function Disconnect IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5V ± 10% Symbol Parameter VIH Input HIGH Voltage VIL IIN Test Conditions Min. Guaranteed Logic HIGH for Control Inputs 2 Input LOW Voltage Guaranteed Logic LOW for Control Inputs Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC Typ.(1) Max. Unit — — V — — 0.8 V — 0.01 ±1 µA IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ VCC, Switches OFF — 0.01 ±1 µA RON Switch ON Resistance(2) VCC = Min., VIN = 0V, ION = 30mA — 5 7 Ω VCC = Min., VIN = 2.4V, ION = 15mA — 10 12 VP Pass Voltage(3) VIN = VCC = 5V, IOUT = -5µA 3.7 4 4.2 NOTES: 1. Typical values are at VCC = 5V and TA = 25°C. 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 R ON (ohms) 14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 VIN (Volts) 3 2.5 3.0 3.5 V IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Max. Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 3 µA ∆ICC Power Supply Current per Control Input HIGH(2) VCC = Max., VIN = 3.4V, f = 0 2.5 mA ICCD 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 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 = -40°C to +85°C, VCC = 5V ± 10% CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted. Symbol Min. (1) Parameter Typ. Max. Unit 0.25(3) ns tPLH tPHL Data Propagation Delay(2) tPZL tPZH Switch Turn-On Delay xOE to xAx, xBx 1.5 6.5 ns tPLZ Switch Turn-Off Delay(2) 1.5 6.2 ns tPHZ xOE to xAx, xBx xAx to xBx, xBx to xAx 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 IDTQS316211 HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package X Process Blank Industrial (-40°C to +85°C) PV PA PAG Shrink Small Outline Package Thin Shrink Small Outline Package TSSOP - Green 316211 High Speed CMOS 24-Bit Bus 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 5 for Tech Support: [email protected] (408) 654-6459