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IDTQS3LR384
HIGH-SPEED CMOS 10-BIT LOW POWER, LOW RESISTANCE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1999 Integrated Device Technology, Inc. DSC-5547/-c
IDTQS3LR384
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
10-BIT LOW POWER, LOW
RESISTANCE BUS SWITCH
DESCRIPTION:
The QS3LR384 provides a set of ten high-speed CMOS TTL-compatible
bus switches. Two banks of 5 switches are controlled by independent Bus
Enable (BE) signals. The very low RON resistance (2.5Ω) of the QS3LR384
allows inputs to be connected without adding propagation delay and without
generating additional ground bounce noise.
The low ON resistance of the QS3LR384 makes it ideal for PCI hot-
plugging or hot-swapping applications.
The QS3LR384 is characterized for operation at -40°C to +85°C.
A0B0
A4B4
B5
B9
A5
A9
BEB
BEA
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
− Enhanced N channel FET with no inherent diode to Vcc
− 2.5Ω bidirectional switches connect in puts to outputs
− Zero propagation delay, zero ground bounce
− Undershoot clamp diodes on all switch and control pins
− Ultra low power with 0.2 µA typical Icc
− Two enables control five bits each
− Available in SOIC and QSOP Packages
APPLICATIONS
− Hot -swapping and hot-docking (low resistance for PCI and
Compact PCI applications)
− Voltage translation (5V to 3.3V)
− Power conservation
− Capacitance reduction and isolation
− Bus isolation
− Clock gating
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3LR384
HIGH-SPEED CMOS 10-BIT LOW POWER, LOW RESISTANCE BUS SWITCH
PIN CONFIGURATION
BEA
GND
B9
A9
A8
A6
1
2
3
4
5
6
7
8
9
10
12 13
14
15
16
17
18
19
20
21
22
23
24
11
SO24-2
SO24-8
Vcc
B8
B7
A7
B6
B5
A5
BEB
B0
A0
A1
B1
B2
A2
A3
B3
B4
A4
SOIC/ QSOP
TOP VIEW
ABSOLUTE MAXIMUM RATINGS (1)
Symbol Description Max. Unit
VTERM(2) Supply Voltage to Ground – 0.5 to +7 V
VTERM(3) DC Switch Voltage VS– 0.5 to +7 V
VTERM(3) DC Input Voltage VIN – 0.5 to +7 V
VAC AC Input Voltage (pulse width ≤20ns) -3 V
IOUT DC Output Current 120 mA
PMAX Maximum Power Dissi pation .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 abov e those i ndicated in the operational s ections
of this specification is not implied. Exposure to absolute maximum
rating con dit ions f or extended periods may affect reliabilit y.
2. Vc c Terminals.
3. All terminals except Vcc.
CAPACITANCE
(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)
Pins Typ. Max. (1) Unit
Control Inputs 3 5 pF
Quickswitch Channels (Switch OFF) 5 7 pF
NOTE:
1. This parameter is guaranteed but not production tes ted.
PIN DESCRIPTION
Pin Names I/O Description
A0 - A9I/O Bus A
B0 - B9I/O Bus B
BEA, BEB I Bus Switch Enable
FUNCTION TABLE(1)
BEA BEB B0 - B4B5 - B9Function
H H Hi-Z Hi-Z Disconnect
LHA
0
- A4Hi-Z Connect
HLHi-ZA
5
- A9Connect
LLA
0
- A4A5 - A9Connect
NOTE:
1. H
=
HIGH V olta
g
e Level
L
=
LOW Volta
g
e Level
Z
=
High-Impedence
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IDTQS3LR384
HIGH-SPEED CMOS 10-BIT LOW POWER, LOW RESISTANCE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
0
2
4
6
8
10
12
14
16
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
RON
(ohms)
VIN
(Volts)
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10%
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Pins 2 — — V
VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V
IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ Vcc — ±0.01 ±1 µA
IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ Vcc, Switches OFF — ±0.01 ±1 µA
RON Switch ON Resistance Vcc = Min., VIN = 0V, ION = 30mA —2.5 5 Ω
R
ON Switch ON Resistance Vcc = Min., VIN = 2.4V, ION = 15mA —48.5
Ω
V
PPass Voltage (2) VIN = Vcc = 5V, IOUT = -5µA3.7 4 4.3 V
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Pas s voltage is guaranteed but not product i on tested.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3LR384
HIGH-SPEED CMOS 10-BIT LOW POWER, LOW RESISTANCE BUS SWITCH
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Typ. Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 0.2 3 µA
∆ICC Power Supply Current per Control Input HIGH (2) VCC = Max., VIN = 3.4V, f = 0 — 2.5 mA
ICCD Dynamic Power Supply Current per MHz(3) VCC = Max., A and B pins open
Control Input Toggling at 50% Duty Cycle — 0.25 mA/MHz
NOTES:
1. For conditions shown as Min. or M ax., use t he appropri ate values specified under DC Electrical Characteristi cs.
2. Per TLL driven input (VIN = 3.4V, c ont rol i nputs only). 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 int ernal capacitance at the specif ied frequency. The A
and B inputs generate no signifi c ant AC or DC currents as they trans i t i on. This parameter i s guaranteed but not produc t i on tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol Parameter Min. (1) Typ. Max. Unit
tPLH
tPHL Data Propagation Delay (2,4)
Ax to Bx, Bx to Ax — — 0.12 (3) ns
tPZL
tPZH Switch Turn-on Delay
BEA, BEB to Ax, Bx 1.5 — 6.5 ns
tPLZ
tPHZ Switch Turn-off Delay (2)
BEA, BEB to Ax, Bx 1.5 — 5.5 ns
NOTES:
1. Mini m um s are guaranteed but not produc tion tested.
2. This param et er i s guaranteed but not produc tion tested.
3. The time constant f or the switch al one i s of the order of 0. 12ns for CL = 50pF.
4. The bus s wi tch contributes no propagation delay other than the RC delay of the ON resis t ance of the switch and the load cap acitance. Since this
time c onstant is m uch smaller t han the rise and fall times of t ypical driv i ng signals, i t adds very little propagation delay to the system. Propagation
delay of t he bus switch, when used in a system, is determined by the driving circuit on the driving side of the swi t ch and its int eraction with t he l oad
on the driven side.
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IDTQS3LR384
HIGH-SPEED CMOS 10-BIT LOW POWER, LOW RESISTANCE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX XX
Package
De vice Type
Blank Industrial (-40°C to +85°C)
Small Outlin e IC (SO 2 4-2)
Quarter Size O utline Package (S O 24-8)
SO
Q
3LR384 High Speed CM O S 10-Bit Low Pow er, Low
Re sistance Bu s S w itch
X
Process
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