IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH FEATURES: IDTQS3VH16245 DESCRIPTION: • N channel FET switches with no parasitic diode to Vcc − Isolation under power-off conditions − No DC path to Vcc or GND − 5V tolerant in OFF and ON state • 5V tolerant I/Os Ω typical • Low RON - 4Ω • Flat RON characteristics over operating range • Rail-to-rail switching 0 - 5V • Bidirectional dataflow with near-zero delay: no added ground bounce • Excellent RON matching between channels • Vcc operation: 2.3V to 3.6V • High bandwidth - up to 500 MHz • LVTTL-compatible control Inputs • Undershoot Clamp Diodes on all switch and control Inputs • Low I/O capacitance, 4pF typical • Available in SSOP and TSSOP packages The QS3VH16245 HotSwitch is a 16-bit high bandwidth bus switch. The QS3VH16245 has very low ON resistance, resulting in under 250ps propagation delay through the switch. The switches can be turned ON under the control of the LVTTL-compatible Output Enable signals (OEx) for bidirectional data flow with no added delay or ground bounce. In the ON state, the switches can pass signals up to 5V. In the OFF state, the switches offer very high impedance at the terminals. The combination of near-zero propagation delay, high OFF impedance, and over-voltage tolerance makes the QS3VH16245 ideal for high performance communications applications. The QS3VH16245 is characterized for operation from -40°C to +85°C. APPLICATIONS: • • • • • Hot-swapping 10/100 Base-T, Ethernet LAN switch Low distortion analog switch Replaces mechanical relay ATM 25/155 switching FUNCTIONAL BLOCK DIAGRAM A0 A1 A2 A3 A4 A5 A6 A7 OE 1 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 2 B0 B1 B2 B3 B4 B5 B6 B7 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE MARCH 2002 1 c 2002 Integrated Device Technology, Inc. DSC-5876/4 IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION NC B0 B1 GND B2 B3 VCC B4 B5 GND B6 B7 B8 B9 GND B10 B11 VCC B12 B13 GND B14 B15 NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 OE1 A0 A1 GND A2 A3 42 41 40 VCC A4 A5 39 38 37 GND A6 A7 36 35 34 33 32 31 30 29 28 27 26 A8 A9 GND A10 A11 VCC A12 A13 GND A14 A15 OE2 25 Symbol Description Max. Unit VTERM(2) Supply Voltage to Ground – 0.5 to 4.6 V VTERM(3) DC Switch Voltage VS – 0.5 to 5.5 V VTERM(3) DC Input Voltage VIN – 0.5 to 5.5 V –3 V 120 mA -65 to +150 °C VAC AC Input Voltage (pulse width ≤20ns) IOUT DC Output Current (max. current/pin) TSTG Storage Temperature 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 Symbol Parameter(1) o (TA = +25 C, f = 1MHz, VIN = 0V, VOUT = 0V) Typ. Max. Unit CIN Control Inputs 3 5 pF CI/O Quickswitch Channels (Switch OFF) 4 6 pF CI/O Quickswitch Channels (Switch ON) 8 12 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names Description OEx Output Enables Ax Data I/Os Bx Data I/Os FUNCTION TABLE(1) OE1 SSOP/ TSSOP TOP VIEW OE2 A0 - A7 A8 - A15 Function Connect L L B0 - B7 B8 - B15 L H B0 - B7 Z H L Z B8 - B15 A0 - A7 = B0 - B7, B8 - B15 Disconnect B0 - B7, Disconnect, A8 - A15 = B8 - B15 H H NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedence 2 Z Z Disconnect IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH 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 = 3.3V ± 0.3V Symbol VIH Parameter Test Conditions Input HIGH Voltage VIL Input LOW Voltage IIN Input Leakage Current (Control Inputs) IOZ IOFF Typ.(1) Max. Unit V Guaranteed Logic HIGH VCC = 2.3V to 2.7V 1.7 — — for Control Inputs VCC = 2.7V to 3.6V 2 — — Guaranteed Logic HIGH VCC = 2.3V to 2.7V — — 0.7 for Control Inputs VCC = 2.7V to 3.6V — — 0.8 — — ±1 µA Off-State Current (Hi-Z) — — ±1 µA Data Input/Output Power Off Leakage VIN or VOUT 0V to 5V, VCC = 0V — — ±1 µA ION = 30mA — 6 8 (Typ. at VCC = 2.5V) VIN = 1.7V ION = 15mA — 7 9 VCC = 3V VIN = 0V ION = 30mA — 4 6 VIN = 2.4V ION = 15mA — 5 8 Switch ON Resistance VIN = 0V NOTE: 1. Typical values are at VCC = 3.3V and TA = 25°C, unless otherwise noted. TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V 16 R ON (ohms) V ≤ VCC 0V ≤ VOUT ≤ 5V, Switches OFF 0V ≤ VIN VCC = 2.3V RON Min. 14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 V IN (Volts) 3 3.0 3.5 4.0 4.5 5.0 Ω IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Parameter Test Conditions(1) ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 ∆ICC Power Supply Current ICCD Dynamic Power Supply Current(4) Symbol (2,3) per Input HIGH VCC = Max., VIN = 3V, f = 0 per Control Input VCC = 3.3V, A and B Pins Open, Control Inputs Min. Typ. Max. Unit — 1.5 3 mA — — 30 µA See Typical ICCD vs Enable Frequency graph below Toggling @ 50% Duty Cycle NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per input driven at the specified level. A and B pins do not contribute to ∆Icc. 3. This parameter is guaranteed but not tested. 4. This parameter represents the current required to switch internal capacitance at the specified frequency. The A and B inputs do not contribute to the Dynamic Power Supply Current. This parameter is guaranteed but not production tested. TYPICAL ICCD vs ENABLE FREQUENCY CURVE AT VCC = 3.3V 20 18 16 ICCD (mA) 14 12 10 8 6 4 2 0 0 2 4 6 8 10 12 ENABLE FREQUENCY (MHZ) 4 14 16 18 20 IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40°C to +85°C VCC = 2.5 ± 0.2V (1) VCC = 3.3 ± 0.3V (1) Max. Min. (4) Max. Unit tPLH tPHL Data Propagation Delay(2,3) Ax to/from Bx 0.2 0.2 ns tPZH tPZL Switch Turn-On Delay OEx to Ax/Bx 1.5 8 1.5 8 ns tPHZ tPLZ Switch Turn-Off Delay OEx to Ax/Bx 1.5 7.5 1.5 7.5 ns fOEx Operating Frequency - Enable (2,5) 10 20 MHz Symbol Parameter Min. (4) NOTES: 1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS. 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 0.2ns 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. Minimums are guaranteed but not production tested. 5. Maximum toggle frequency for OEx control input (pass voltage > VCC, VIN = 5V, RLOAD > 1MΩ, no CLOAD). 5 IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SOME APPLICATIONS FOR HOTSWITCH PRODUCTS NFET 0 to +5V Vcc = 3.3V +6.5V CHARGE PUMP OE 0 to +5V DRIVER SINGLE HOT SWITCH Rail-to-Rail Switching PHY 3VH SWITCH 4.5VPP Z = 100 Ω LOGIC SIDE 10Mbps to 100Mbps Z = 100 Ω >100m 4.5VPP TWISTED PAIR LOGIC SIDE 2VPP Fast Ethernet Data Switching (LAN Switch) ZERO DOWN TIME SYSTEM PLUGGABLE CARD/ LIVE SYSTEM CARD I/O ON CARD LOGIC CONNECTOR QS3VHXXX CPU CARD I/O ON CARD LOGIC CONNECTOR QS3VHXXX RAM BUS Hot Swapping 6 IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS Symbol VCC(1)= 3.3V ± 0.3V VCC(2)= 2.5V ± 0.2V Unit VLOAD 6 2 x Vcc V SAM E PHAS E INPUT TRANSITION VIH 3 Vcc V OUTPUT VT 1.5 VCC/2 V VLZ 300 150 mV VHZ 300 150 mV CL 50 30 pF t PLH t PH L t PLH t PHL V IH VT 0V V OH VT V OL V IH VT 0V OPPOSITE PHASE INPUT TRANSITIO N Propagation Delay V LOAD V CC 500 Ω (1, 2) Pulse G enerator V IN CONTROL INPUT GND t PZL V OUT D.U.T. RT DISABLE ENABLE Open OUTPUT SW ITCH NORMALLY CLOSED LOW t PZH OUTPUT SW ITCH NO RM ALLY OPEN HIGH 500 Ω CL Test Circuits for All Outputs SWITCH POSITION tPLZ/tPZL VLOAD tPHZ/tPZH GND tPD Open V LO AD/2 V L O A D /2 VT V OL V OL t PH Z + V LZ VT VOH V O H -V H Z 0V 0V Enable and Disable Times NOTES: 1. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns. 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2ns; tR ≤ 2ns. Switch 0V NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. Test t PLZ V IH VT 7 IDTQS3VH16245 2.5V / 3.3V 16-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 PV PA Shrink Small Outline IC Thin Shrink Small Outline Package 3VH16245 2.5V / 3.3V 16-Bit High Bandwidth Bus Switch for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 8 for Tech Support: [email protected] (408) 654-6459