IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS™ COMPATIBLE BUS SWITCH FEATURES: • • • • • • • • IDTQS316245 DESCRIPTION: Enhanced N channel FET with no inherent diode to Vcc Ω bidirectional switches connect inputs to outputs 5Ω Pin compatible with FCT16245 Flowthrough pinout for easy layout Zero propagation delay, zero ground bounce TTL-compatible input and output levels Undershoot clamp diodes on all switch and control inputs Available in SSOP package The QS316245 provides a set of 16 high-speed CMOS TTL-compatible bus switches (two banks of 8 switches each) in a flow-thru pinout. The low ON resistance of the QS316245 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Output Enable (OEx) signal turns the switches on similar to the OEx signal of the 74’245. The QS316245 is ideally suited for 5V to 3.3V translation, bus switching and isolation, and hot insertion. QuickSwitch devices provide an order of magnitude faster speed than conventional logic devices. APPLICATIONS: • • • • • Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Bus switching, isolation Power conservation, clock gating Logic replacement FUNCTIONAL BLOCK DIAGRAM A0 A1 A2 A3 A4 A5 A6 A7 B0 B1 B2 B3 B4 B5 B6 B7 A8 A9 A 10 A 11 A 12 A 13 A 14 A 15 B8 B9 B 10 B 11 B 12 B 13 B 14 B 15 OE 1 OE 2 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE JANUARY 2000 1 c 2000 Integrated Device Technology, Inc. DSC-5720/1 IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol Description VTERM(2) Max Unit Supply Voltage to Ground –0.5 to +7 V VTERM(3) DC Switch Voltage to Ground –0.5 to +7 V NC 1 48 OE1 B0 2 47 A0 VTERM(3) DC Input Voltage VIN –0.5 to +7 V B1 3 46 A1 VAC AC Input Voltage (pulse width ≤20ns) –3 V GND 4 45 GND IOUT DC Output Current 120 mA B2 5 44 A2 PMAX Maximum Power B3 6 43 A3 TSTG Storage Temperature Vcc 7 42 Vcc B4 8 41 A4 B5 9 40 A5 GND 10 39 GND B6 11 38 A6 B7 12 37 A7 B8 13 36 A8 B9 14 35 A9 GND 15 34 GND B10 16 33 A10 B11 17 32 A11 Vcc 18 31 Vcc B12 19 30 A12 B13 20 29 A13 GND 21 28 GND B14 22 27 A14 Pin Names I/O B15 23 26 A15 Ax I/O Bus A NC 24 Bx I/O Bus B OEx I 25 0.5 W –65 to +150 °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 . CAPACITANCE (TA = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V) Pins Max. (1) Typ. Control Inputs 3 5 pF Quickswitch Channels (Switch OFF) 5 7 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION OE2 Description Bus Enable SSOP TOP VIEW FUNCTION TABLE(1) OEx Ax L Bx H Z NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = High-Impedance 2 Unit Function Connect Disconnect IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS 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. Typ.(1) Max. Unit Guaranteed Logic HIGH for Control Inputs 2 — — V Input LOW Voltage Guaranteed Logic LOW for Control Inputs — — 0.8 V Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC — — ±1 µA IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ VCC, Switches OFF — — ±1 µA RON Switch ON Resistance VCC = Min., VIN = 0V, ION = 30mA — 5 7 Ω VCC = Min., VIN = 2.4V, ION = 15mA — 10 12 VP Pass Voltage(2) VIN = 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 VIN (Volts) 3 2.5 3.0 3.5 V IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS 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 1.5 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 OEx to Ax/Bx 1.5 6.5 ns tPLZ Switch Turn-Off Delay(2) 1.5 5.5 ns tPHZ OEx to Ax/Bx Ax to Bx, Bx to Ax 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 IDTQS316245 HIGH-SPEED CMOS QUICKSWITCH 16-BIT WIDEBUS INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package X Process CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Blank Industrial (-40°C to +85°C) PV Shrink Small Outline Package 316245 High Speed CMOS QuickSwitch 16-Bit Widebus™ Compatible Bus Switch 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