IDTQS32X384 HIGH-SPEED CMOS 20-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS 20-BIT BUS SWITCH FEATURES: • • • • • • • • IDTQS32X384 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 Undershoot clamp diodes on all switch and control pins Four enables control five bits each TTL-compatible input and output levels Available in 48-pin QVSOP package The QS32X384 provides a set of twenty high-speed CMOS TTLcompatible bus switches. The low ON resistance of the QS32X384 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Bus Enable (BE) signals turn the switches on. Four Bus Enable signals are provided, one for each of five bits of the 20-bit bus. The ‘384 family of QuickSwitch products is ideal for switching wide digital buses, as well as hotplug buffering, and 5V to 3V conversion. The QS32X384 is characterized for operation at -40°C to +85°C. APPLICATIONS: • • • • • • Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Power conservation Capacitance reduction and isolation Bus isolation Clock gating FUNCTIONAL BLOCK DIAGRAM A0 B0 A10 B10 A4 B4 A14 B14 A5 B5 A15 B15 A9 B9 A19 B19 BEA BEC BED BEB The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE c 2002 Integrated Device Technology, Inc. APRIL 2002 1 DSC-5729/1 IDTQS32X384 HIGH-SPEED CMOS 20-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol Description Max Unit VTERM(2) Supply Voltage to Ground –0.5 to +7 V VTERM(3) DC Switch Voltage VS –0.5 to +7 V VTERM(3) DC Input Voltage VIN –0.5 to +7 V BEA 1 48 VCC B0 2 47 B19 A0 3 46 A19 VAC AC Input Voltage (pulse width ≤20ns) –3 V IOUT DC Output Current 120 mA PMAX Maximum Power Dissipation (TA = 85°C) TSTG Storage Temperature A1 4 45 A18 B1 5 44 B18 B2 6 43 B17 A2 7 42 A17 A3 8 41 A16 B3 9 40 B16 B4 10 39 B15 A4 11 38 A15 GND 12 37 BEB BEC 13 36 VCC B5 14 35 B14 A5 15 34 A14 A6 16 33 A13 B6 17 32 B13 B7 18 31 B12 A7 19 30 A12 A8 20 29 A11 B8 21 28 B11 B9 22 27 B10 A9 23 26 A10 GND 24 25 BED CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT = 0V) A0 - A19 I/O Bus A B0 - B19 I/O Bus B BEA I Enable, 0 - 4 BEB I Enable, 15 - 19 BEC I Enable, 5 - 9 BED I Enable, 10 - 14 Pins Typ. Max.(1) Unit Control Inputs 3 5 pF Quickswitch Channels (Switch OFF) 5 7 pF NOTE: 1. This parameter is guaranteed but not production tested. FUNCTION TABLE(1) PIN DESCRIPTION I/O W °C 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 . QVSOP TOP VIEW Pin Names 0.5 –65 to +150 Description BEA BEB B0 - B 4 B15 - B19 H H Hi-Z Hi-Z Disconnect L H A0 - A4 Hi-Z Connect H L Hi-Z A15 - A19 Connect L L A0 - A4 A15 - A19 Connect BEC BED B5 - B 9 B10 - B14 Function H H Hi-Z Hi-Z Disconnect L H A5 - A9 Hi-Z Connect H L Hi-Z A10 - A14 Connect L L A5 - A9 A10 - A14 Connect NOTE: 1. H = L = X = Z = 2 Function HIGH Voltage Level LOW Voltage Level Don’t care High-Impedence IDTQS32X384 HIGH-SPEED CMOS 20-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 ± 5% Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Inputs 2 — — V VIL Input LOW Voltage Guaranteed Logic LOW for Control Inputs — — 0.8 V IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC — ±0.01 ±1 µA IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ VCC, Switches OFF — ±0.01 ±1 µA RON Switch ON Resistance VCC = Min, VIN = 0V, ION = 30mA — 5 7 Ω VCC = Min, VIN = 2.4V, ION = 15mA — 10 15 VP Pass Voltage(2) VCC = 5V, IOUT = -5µA 3.7 4 4.2 NOTES: 1. Typical values are at VCC = 5V and TA = 25°C. 2. 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 V IN (Volts) 3 2.5 3.0 3.5 V IDTQS32X384 HIGH-SPEED CMOS 20-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 mA ∆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, 0.25 mA/MHz Control Input Toggling at 50% Duty Cycle 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, 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 but not production tested. SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40°C to +85°C, VCC = 5.0V ± 5% CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted. Symbol Min. (1) Parameter tPLH Data Propagation Delay (2,4) tPHL Ax to Bx, Bx to Ax tPZL Switch Turn-on Delay tPZH BEn to Ax, Bx tPLZ Switch Turn-off Delay (2) tPHZ BEn to Ax, Bx Typ. Max. Unit — — 0.25 (3) ns 1.5 — 6.5 ns 1.5 — 5.5 ns NOTES: 1. Minimums are guaranteed but not production tested. 2. This parameter is guaranteed but not production tested. 3. The time constant for the switch alone is of the order of 0.25ns for CL = 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 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 IDTQS32X384 HIGH-SPEED CMOS 20-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package X Process Blank Industrial (-40°C to +85°C) Q1 48-Pin QVSOP 32X384 High Speed CMOS 20-Bit Bus Switch DATA SHEET DOCUMENT HISTORY 4/8/2002 Changed Pin layout diagram 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