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IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH(R) PRODUCTS 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
.EATURES:
* 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 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
IDTQS3VH16212 PRELIMINARY
DESCRIPTION:
The QS3VH16212 Bus Exchange HotSwitch with 24-bits is a high bandwidth bus switch. The QS3VH16212 has very low ON resistance, resulting in under 250ps propagation delay through the switch. The device operates as a 24-bit bus switch or a 12-bit bus exchanger, which provides data exchanging between the four signal ports through the data-select (S0 - S2) terminals. In the OFF and ON states, the switches are 5V-tolerant. 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 QS3VH16212 ideal for high performance communications applications. The QS3VH16212 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
.UNCTIONAL BLOCK DIAGRAM
1 of 12 Channels 1A1 1B1
1A2
1B2
Flow Control S0 S1 S2
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 2002 Integrated Device Technology, Inc.
MARCH 2002
DSC-5884/3
IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CON.IGURATION
S0 1A1 1A2 2A1 2A2 3A1 3A2 GND 4A1 4A2 5A1 5A2 6A1 6A2 7A1 7A2 VCC 8A1 GND 8A2 9A1 9A2 10A1 10A2 11A1 11A2 12A1 12A2 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 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 S1 S2 1B1 1B2 2B1 2B2 3B1 GND 3B2 4B1 4B2 5B1 5B2 6B1 6B2 7B1 7B2 8B1 GND 8B2 9B1 9B2 10B1 10B2 11B1 11B2 12B1 12B2
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) VTERM(3) VAC IOUT TSTG Description Supply Voltage to Ground DC Switch Voltage VS DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current (max. current/pin) Storage Temperature Max. - 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
Symbol CIN CI/O CI/O Parameter(1) Control Inputs
(TA = +25 C, f = 1MHz, VIN = 0V, VOUT = 0V) Typ. 3 6 12 Max. 5 8 16 Unit pF pF pF
o
Quickswitch Channels (Switch OFF) Quickswitch Channels (Switch ON)
NOTE: 1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
1Ax 1Bx
I/O I/O I/O I Bus A Bus B
Description
-
12Ax 12Bx
S0 - S2
Data Select
.UNCTION TABLE(1)
S2 L L S1 L L H H L L H H S0 L H L H L H L Z xA1 Z xB1 xB2 Z Z Z xB1 xB2 xA2 Z Z Z xB1 xB2 Z xB2 xB1 Function Disconnect xA1 to xB1 xA1 to xB2 xA2 to xB1 xA2 to xB2 Disconnect xA1 to xB1, xA2 to xB2 xA1 to xB2, xA2 to xB1
SSOP/ TSSOP TOP VIEW
L L H H H H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedence
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IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE(1)
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 Test Conditions Guaranteed Logic HIGH for Control Inputs Guaranteed Logic HIGH for Control Inputs 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 -- -- -- -- -- ION = 30mA ION = 15mA ION = 30mA ION = 15mA -- -- -- -- Typ.(1) -- -- -- -- -- -- -- 6 7 4 5 Max. -- -- 0.7 0.8 1 1 1 8 9 6 8 A A A V Unit V
VCC 0V VOUT 5V, Switches OFF
VIN or VOUT 0V to 5V, VCC = 0V VCC = 2.3V VCC = 3V VIN = 0V VIN = 0V VIN = 2.4V (Typ. at VCC = 2.5V) VIN = 1.7V
0V VIN
NOTE: 1. Typical values are at VCC = 3.3V and TA = 25C, unless otherwise noted.
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16 14
RON
(ohms)
12 10 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
IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current
(2,3)
Test Conditions(1) VCC = Max., VIN = GND or VCC, f = 0 VCC = Max., VIN = 3V, f = 0 per Control Input VCC = 3.3V, A and B Pins Open, Control Inputs Toggling @ 50% Duty Cycle per Input HIGH
Min. -- --
Typ. 1.5 --
Max. 3 30
Unit mA A
Dynamic Power Supply Current(4)
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 .REQUENCY CURVE AT VCC = 3.3V
20
18 16
14
ICCD (mA)
12
10
8 6
4 2
0 0 2 4 6 8 10 12 14 16 18 20
ENABLE FREQUENCY (MHz)
4
IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE 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 tPSX fSx Parameter Data Propagation Delay(2,3) xAx to xBx or xBx to xAx Switch Turn-On Delay Sx to xAx, xBx Switch Turn-Off Delay Sx to xAx, xBx Propagation Delay Sx to xAx, xBx Operating Frequency - Enable (2,5) Min. (4) 1.5 1.5 1.5
Max.
VCC = 3.3 0.3V (1) Min. (4) 1.5 1.5 1.5
Max.
Unit ns ns ns ns MHz
0.2 11.5 11 11 10
0.2 11 10.5 9 20
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 Sx control input (pass voltage > VCC, VIN = 5V, RLOAD > 1M, no CLOAD).
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IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SOME APPLICATIONS .OR HOTSWITCH PRODUCTS
NFET
0 to +5V
0 to +5V
Vcc = 3.3V
CHARGE PUMP
+6.5V
OE
DRIVER SINGLE HOT SWITCH
Rail-to-Rail Switching
PHY 4.5VPP 3VH SWITCH
LOGIC SIDE 4.5VPP
Z = 100
10M bps to 100Mbps >100m TWISTED PAIR
Z = 100
LOGIC SIDE 2VPP
Fast Ethernet Data Switching (LAN Switch)
PLUGGABLE CARD/ LIVE SYSTEM CONNECTOR
ZERO DOWN TIME SYSTEM QS3 VH XXX
CARD I/O
ON CARD LOGIC
CPU
CONNECTOR
QS3 VH XX X
CARD I/O
ON CARD LOGIC
RAM
Hot Swapping 6
BUS
IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVE.ORMS TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 3.3V 0.3V 6 3 1.5 300 300 50 VCC(2)= 2.5V 0.2V 2 x Vcc Vcc VCC/2 150 150 30 Unit V V V mV mV pF
tPLH OPPOSITE PHASE INPUT TRANSITION tPHL SAME PHASE INPUT TRANSITION tPLH OUTPUT tPHL
VIH VT 0V VOH VT VOL VIH VT 0V
Propagation Delay
VLOAD ENABLE Open 500 Pulse Generator
(1, 2)
VCC
DISABLE
GND
CONTROL INPUT tPZL OUTPUT SW ITCH NORM ALLY CLO SE D LOW tPZH OUTPUT SW ITCH NORM ALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ
VIH VT 0V VLOAD/2 VOL V OL VOH VOH 0V
+
VIN D.U.T.
VOUT
V LZ
RT
500 CL
-V H Z
Test Circuits for All Outputs
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 1.0MHz; tF 2.5ns; tR 2.5ns. 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2ns; tR 2ns.
NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
SWITCH POSITION
Test tPLZ/tPZL tPHZ/tPZH
tPD
Switch VLOAD GND Open
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IDTQS3VH16212 2.5V / 3.3V 24-BIT BUS EXCHANGE HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING IN.ORMATION
IDTQS XXXXX Device Type XX Package
PV PA
Shrink Small Outline Package Thin Shrink Small Outline Package
3VH16212
2.5V / 3.3V 24-Bit Bus Exchange High Bandwidth 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
for Tech Support: logichelp@idt.com (408) 654-6459
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