1
INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH126
3.3V QUAD ACTIVE HIGH SWITCH FOR HOT SWAP APPLICATIONS
MARCH 2000
1999 Integrated Device Technology, Inc. DSC-5774/-c
IDTQS3VH126
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
3.3V QUAD ACTIVE HIGH SWITCH
FOR HOT SWAP APPLICATIONS
(HOTSWITCH™)
DESCRIPTION:
FUNCTIONAL BLOCK DIAGRAM
The QS3VH126 HotSwitch Quad bus switch is specially designed for a
hot-swapping environment. The QS3VH126 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 active high Output Enable signals for bidirectional data flow with
no added delay or ground bounce. 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 QS3VH126 ideal for hot-swapping
applications.
The QS3VH126 is characterized for operation from -40°C to +85°C.
4OE
1A
1Y2Y3Y4Y
2A3A4A
3OE
2OE
1OE
FEATURES:
− N channel FET switches with no parasitic diode to Vcc
• No DC path to Vcc or GND
• 5V tolerant in OFF and ON state
− 5V tolerant I/Os
− Low RON - 4Ω typical
− Flat RON characteristics from 0 - 5V
− 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
− Maximum operating frequency for data - 150MHz
− LVTTL-compatible control Inputs
− Undershoot Clamp Diodes on all switch and control Inputs
− Low I/O capacitance, 4pF typical
− Available in QSOP and SOIC packages
APPLICATIONS:
− PCI/Compact PCI hot-swapping
− 10/100 Base-T, Ethernet LAN switch
− Low distortion analog switch
− Replaces mechanical relay
− ATM 25/155 switching
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH126
3.3V QUAD ACTIVE HIGH SWITCH FOR HOT SWAP APPLICATIONS
PIN CONFIGURATION
QSOP
TOP VIEW
SOIC
TOP VIEW
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
1OE
1A
1Y
2OE
2A
2Y
GND
VCC
4OE
4A
4Y
3OE
3A
3Y
NC
SO16-7
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1OE
1A
1Y
2OE
2A
2Y
GND
VCC
4OE
4A
4Y
3OE
3A
3Y
SO14-1
ABSOLUTE MAXIMUM RATING(1)
Symbol Description Max. Unit
V
TERM(2) Supply Voltage to Ground – 0.5 to 4.6 V
V
TERM(3) DC Switch Voltage VS– 0.5 to 5.5 V
V
TERM(3) DC Input Voltage VIN – 0.5 to 5.5 V
VAC AC Input Voltage (pulse width ≤20ns) – 3 V
VOUT DC Output Current 120 mA
PMAX Maximum Power Dissipation 0.5 W
TSTG Storage Temperature -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 = +25oC, f = 1MHz, VIN = 0V, VOUT = 0V)
Symbol Parameter(1) Typ. Max. Unit
CIN Control Inputs 3 5 pF
CI/O Quickswitch Channels (Switch OFF) 4 6 pF
NOTE:
1. This pa ram eter is guaranteed but not product ion tested.
PIN DESCRIPTION
Pin Names I/O Description
1A - 4AI/O Bus A
1Y - 4YI/O Bus Y
1OE - 4OE I Bus Switch Enable
FUNCTION TABLE (1)
OE A Y Function
H H H Connect
H L L Connect
L X X Disconnect
NOTE:
1. H = HIGH V ol tage Level
L = LOW Volt age Level
X = Don’t Care
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH126
3.3V QUAD ACTIVE HIGH SWITCH FOR HOT SWAP APPLICATIONS
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16
14
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 5.04.5
RON
(ohms)
VIN
(Volts)
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 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 ——±1µA
I
OZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ VCC, Switches OFF ——±1µA
R
ON Switch ON Resistance VCC = Min., VIN = 0V, ION = 30mA — 4 6 Ω
VCC = Min., VIN = 2.4V, ION = 15mA — 5 8
NOTE:
1. Typical v al ues are at VCC = 3.3V and T A = 25° C.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH126
3.3V QUAD ACTIVE HIGH SWITCH FOR HOT SWAP APPLICATIONS
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 3 mA
∆ICC Power Supply Current(2, 3) per Input HIGH VCC =Max., VIN = 3V, f = 0 per Control Input 30 µA
ICCD Dynamic Power Supply Current per MHz (4) VCC = Max., A and Y Pins Open, Control Inputs Toggling @ 50% Duty
Cycle 0.25 mA/MHz
NOTES:
1. For conditi ons shown as Mi n. or Max., use the appropriate values s pecified under DC E l ectrical Characteristics.
2. Per LVTLL driv en i nput. A and Y pi ns do not cont ri bute to ∆Icc.
3. This paramet er i s guaranteed but not t ested.
4. This paramet er represents t he current required to switch i nt ernal capacitance at the s pecified f requency. The A and Y i nputs do not contribute to the
Dynamic Power Supply Current . This parameter is guaranteed but not product i on t ested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 3.3V ± 0.3V
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted
Symbol Parameter Min. (3) Typ. Max. Unit
tPLH
tPHL Data Propagation Delay(1,2)
A to Y 0.2 ns
tPZH
tPZL Switch Turn-On Delay
OE to nA/nY 1.5 9ns
t
PHZ
tPLZ Switch Turn-Off Delay(1)
OE to nA/nY 1.5 8ns
f
S
Operating Frequency - Data(1,4)
OE = HIGH
150(6) MHz
fOE Operating Frequency - Enable (1,5) 1MHz
NOTES:
1. This parameter is guaranteed but not product i on t ested.
2. The bus switch cont ri butes no propagation del ay other than t he RC del ay of the ON resi stance of the switch and the load cap acitance. The time
const ant for the switch alone is of the order of 0. 2ns at CL = 50pF. Since t hi s time constant i s much sm al l er than the rise and fall times of t y pi cal
driving s i gnal s, it adds very li ttle propagati on del ay to the system. Propagation delay of the bus switch, when us ed i n a system, is determined by the
driving c i rcuit on the dri ving side of the switch and its i nteraction wi th the load on the dri v en side.
3. Minimum s are guaranteed but not production tested.
4. Maxim um frequency f or bi di rectional dat a flow.
5. Maxim um toggle frequency for OE c ont rol i nput.
6. Measured at CLOAD = 30pF.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH126
3.3V QUAD ACTIVE HIGH SWITCH FOR HOT SWAP APPLICATIONS
PHY
3VH
SWITCH
4.5VPP
LOGIC
SIDE Z = 100 Ω10M bps to 100M b ps
2VPP
4.5VPP
LOGIC
SIDE
Z = 100 Ω
TW ISTED PAIR
>100m
CH AR GE PUM P
OE
Vcc = 3.3V
0 to +5V NFET
+6.5V
DRIVER
0 to +5V
SINGLE HO T
SWITCH
CARD I/O ON CARD
LOGIC
CONNECTOR
QS3VHXXX
CPU
RAM
PCI/CO M PA CT P CI
BUS
CARD I/O ON CARD
LOGIC
CONNECTOR
QS3VHXXX
PLUGGABLE CARD/ LIVE SYSTEM ZERO DOWN TIME SYSTEM
RAIL-TO-RAIL SWITCHING
HOT SWAPPING: PCI/COMPACT PCI
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
FAST ETHERNET DATA SWITCHING (LAN SWITCH)
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3VH126
3.3V QUAD ACTIVE HIGH SWITCH FOR HOT SWAP APPLICATIONS
ORDERING INFORMATION
CORPORATE HEADQUARTERS for SALES:
2975 Stender Way 800-345-7015 or 408-727-6116
Santa Clara, CA 95054 fax: 408-492-8674
www.idt.com*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo, QuickSwitch, and SynchroSwitch are registered trademarks of Integrated Device Technology, Inc.
IDTQS XXXXX XX X
Package Process
Device Type
Blank
3VH126
Ind u s tria l (-40 ° C to + 8 5° C )
3.3V Quad Active High Sw itch for Hot Sw ap
Applications
Q
DC Quarter Size Outline Package (SO16-7)
S m all O u tlin e IC (SO1 4-1 )
