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IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
IDTQS34XVH245 PRELIMINARY
FEATURES:
* 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 * Low RON , 4 typical * 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 500MHz * LVTTL-compatible control Inputs * Undershoot Clamp Diodes on all switch and control Inputs * Low I/O capacitance, 4pF typical * Available in 80-pin QVSOP package
DESCRIPTION:
The QS34XVH245 HotSwitch is a high bandwidth 32-bit bus switch. The QS34XVH245 has very low ON resistance, resulting in under 250ps propagation delay through the switch. The switches can be turned ON under the control of individual LVTTL-compatible Output Enable (OEx) signals for bidirectional data flow with no added delay or ground bounce. In the ON state, the switches can pass up to 5V. In the OFF state, the switches offer very high impedence at the terminals. The combination of near-zero propagation delay, high OFF impedance, and over-voltage tolerance makes the QS34XVH245 ideal for high performance communications applications. The QS34XVH245 is characterized for operation from -40C to +85C.
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 A 16 A 17 A 18 A 19 A 20 A 21 A 22 A 23
OE 1
OE 3
B0
B1
B2
B3
B4
B5
B6
B7
B 16
B 17
B 18
B 19
B 20
B 21 B 22
B 23
A8
A9
A 10 A 11
A 12
A 13 A 14 A 15
A 24
A 25
A 26
A 27
A 28
A 29 A 30
A 31
OE 2
OE 4
B8
B9
B 10 B 11
B 12
B 13 B 14 B 15
B 24
B 25
B 26
B 27
B 28
B 29
B 30
B 31
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 2003 Integrated Device Technology, Inc.
MARCH 2003
DSC-5593/8
IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC A0 A1 A2 A3 A4 A5 A6 A7 GND NC A8 A9 A10 A11 A12 A13 A14 A15 GND NC A16 A17 A18 A19 A20 A21 A22 A23 GND NC A24 A25 A26 A27 A28 A29 A30 A31 GND 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 29 30 31 32 33 34 35 36 37 38 39 40 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 Vcc OE1 B0 B1 B2 B3 B4 B5 B6 B7 Vcc OE2 B8 B9 B10 B11 B12 B13 B14 B15 Vcc OE3 B16 B17 B18 B19 B20 B21 B22 B23 Vcc OE4 B24 B25 B26 B27 B28 B29 B30 B31
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) VTERM(3) VAC IOUT TSTG Description Max SupplyVoltage to Ground DC Switch Voltage VS DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current (max. sink current/pin) Storage Temperature -0.5 to +4.6 -0.5 to +5.5 -0.5 to +5.5 -3 120 -65 to +150
Unit V V V V mA 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 = +25C, F = 1MHz, VIN = 0V, VOUT = 0V)
Symbol CIN CI/O CI/O Parameter(1) Control Inputs Quickswitch Channels (Switch OFF) Quickswitch Channels (Switch ON) Typ. 3 4 8 Max. 5 6 12 Unit pF pF pF
NOTE: 1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names OEx Ax Bx I/O I I/O I/O Bus A Bus B Description Output Enable
FUNCTION TABLE(1)
OEx H L
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
Function Disconnected Connect (Ax = Bx)
QVSOP TOP VIEW 2
IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 3.3V 0.3V
Symbol VIH VIL IIN IOZ IOFF RON Parameter Input HIGH Voltage Input LOW Voltage Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Data Input/Output Power Off Leakage Switch ON Resistance for Control Inputs Guaranteed Logic LOW for Control Inputs 0V VIN VCC 0V VOUT 5V, Switches OFF VIN or VOUT 0V to 5V, VCC = 0V VCC = 2.3V Typical at VCC = 2.5V VCC = 3V
NOTE: 1. Typical values are at VCC = 3.3V and TA = 25C.
Test Conditions Guaranteed Logic HIGH VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V
Min. 1.7 2 -- -- -- -- --
Typ.(1) Max. -- -- -- -- -- -- -- 6 7 4 5 -- -- 0.7 0.8 1 1 1 8 9 6 8
Unit V V A A A
VIN = 0V VIN = 1.7V VIN = 0V VIN = 2.4V
ION = 30mA ION = 15mA ION = 30mA ION = 15mA
-- -- -- --
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16 14 12 10
RON
(ohms)
8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIN
(Volts)
3
IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current (2,3) per Input HIGH Dynamic Power Supply Current per Output Enable Control Input
(4)
Test Conditions(1) VCC = Max., VIN = GND or VCC, f = 0 VCC = Max., VIN = 3V, f = 0 per Control Input Toggling @ 50% Duty Cycle
Min. -- --
Typ. 4 --
Max. 12 30
Unit mA A
VCC = 3.3V, A and B Pins Open, Control Inputs See Typical ICCD vs Enable Frequency graph below
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
12
10
8
ICCD (mA)
6
4
2
0 0 2 4 6 8 10 12 14 16 18 20
ENABLE FREQUENCY (MHZ)
4
IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40C to +85C
VCC = 2.5 0.2V (1) Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ fOEx Parameter Data Propagation Delay(2,3) Ax to/from Bx Switch Turn-On Delay OEx to Ax/Bx Switch Turn-Off Delay OEx to Ax/Bx Operating Frequency - Enable(2,5) Min. (4) VCC = 3.3 0.3V (1) Min. (4) 1.5 1.5 Max. 0.2 7 6.5 20 Unit ns ns ns MHz Max. 0.2 8 7 10
1.5 1.5
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 1M, no CLOAD).
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IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
0 to +5V
NFET
0 to +5V
Vcc = 3.3V
CHARGE PUMP
+6.5V
OE
DRIVER SINGLE HOT SW ITCH
Rail-to-Rail Switching
PHY 4.5VPP 3VH SW ITCH
LOGIC SID E 4.5VPP
Z = 100
10M bps to 100Mbps >100m TW ISTED PAIR
Z = 100
LOGIC SID E 2VPP
Fast Ethernet Data Switching (LAN Switch)
PLUGGABLE CAR D/ LIVE SYSTEM CONNECTOR
ZERO DOW N TIME SYSTEM QS34VHXXX
CARD I/O
ON CARD LOGIC
CPU
QS34VHXXX
CONNEC TOR
CARD I/O
ON CARD LOGIC
RAM
Hot-Swapping
BUS
6
IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC = 3.3V 0.3V
(1)
VCC = 2.5V 0.2V
(2)
Unit V V V mV mV pF
SAM E PHASE INPUT TRANSITION tPLH OUTPUT tPLH O PPOSITE PHASE INPUT TRANSITION tPHL tPHL
VIH VT 0V VOH VT VOL VIH VT 0V
6 3 1.5 300 300 50
2 x Vcc Vcc VCC/2 150 150 30
Propagation Delay
VCC 500 Pulse Generator
(1, 2)
VLOAD ENABLE Open G ND CONTRO L INPUT tPZL OUTPUT SW ITCH NORMALLY CLO SED LOW tPZH OUTPUT SW ITCH NORMALLY OPEN HIGH VLOAD/2 VT
DISABLE
VIH VT 0V VLOAD/2 VOL VOL VOH VOH 0V
+
VIN D.U.T.
VOUT
tPLZ
VLZ
RT
500 CL
tPHZ VT 0V
-V H Z
Test Circuits for All Outputs
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. NOTES: 1. Pulse Generator for All Pulses: Rate 10MHz; tF 2.5ns; tR 2.5ns. 2. Pulse Generator for All Pulses: Rate 10MHz; tF 2ns; tR 2ns.
Enable and Disable Times
SWITCH POSITION
Test tPLZ/tPZL tPHZ/tPZH
tPD
Switch VLOAD GND Open
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IDTQS34XVH245 2.5V / 3.3V 32-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX Device Type XX Package
Q3
80-Pin QVSOP
34XVH245
2.5V / 3.3V 32-Bit High Bandwidth Bus Switch
DATA SHEET DOCUMENT HISTORY
8/6/2002 3/3/2003 Updated according to PCN Logic-0206-11 Changed Icc limits
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
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