IDT IDTQS316211

IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
24-BIT BUS SWITCH
FEATURES:
•
•
•
•
•
•
DESCRIPTION:
Enhanced N channel FET with no inherent diode to Vcc
Ω bidirectional switches connect inputs to outputs
5Ω
Zero propagation delay, zero ground bounce
TTL-compatible input and output levels
Undershoot clamp diodes on all switch and control inputs
Available in SSOP and TSSOP packages
The QS316211 provides a set of 24 high-speed CMOS TTL-compatible
bus switches. The low ON resistance of the QS316211 allows inputs to be
connected to outputs without adding propagation delay and without generating additional ground bounce noise. The device operates as a 24-bit bus
switch. When 1OE is low, 1An is connected to 1Bn. When 2OE is low, 2An
is connected to 2Bn.
The QS316211 is ideal for switching wide digital buses, 5V to 3.3V
translation, and for hot plug buffering.
The QS316211 is characterized for operation at -40°C to +85°C.
APPLICATIONS:
•
•
•
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IDTQS316211
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Logic replacement (data processing)
Power conservation
Capacitance reduction and isolation
Bus isolation
Clock gating
FUNCTIONAL BLOCK DIAGRAM
1A1
1B1
1A12
1B12
1OE
2A1
2B1
2A12
2B12
2OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1
c
1999 Integrated Device Technology, Inc.
DSC-5570/2
IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
NC
1
56
1A 1
2
55
1OE
2OE
Symbol
Description
VTERM(2)
Max
Unit
VTERM(3)
Supply Voltage to Ground
–0.5 to +7
V
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
1A 2
3
54
1B1
IOUT
DC Output Current
120
mA
1A 3
4
53
1B2
PMAX
Maximum Power Dissipation (TA = 85°C)
0.93
W
1A 4
5
52
1B3
TSTG
Storage Temperature
–65 to +150
°C
1A 5
6
51
1B4
1A 6
7
50
1B5
GND
8
49
GND
1A 7
9
48
1B 6
1A 8
10
47
1B7
1A 9
11
46
1B8
1A10
12
45
1B9
1A11
13
44
1B10
1A12
14
43
1B11
2A 1
15
42
1B12
2A 2
16
41
2B 1
VCC
17
40
2B 2
2A 3
18
39
2B 3
GND
19
38
GND
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 = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V)
Pins
Typ.
Max. (1)
Unit
Control Inputs
4.5
6
pF
Quickswitch Channels (Switch OFF)
5.5
7
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
I/O
xA1 - xA12
I/O
Bus A
Description
xB1 - xB12
I/O
Bus B
1OE - 2OE
I
Data Select
2A 4
20
37
2B 4
2A 5
21
36
2B 5
2A 6
22
35
2B 6
2A 7
23
34
2B 7
2A 8
24
33
2B 8
1OE
2OE
xA
xY
2A 9
25
32
2B 9
L
L
1 Bx
2 Bx
1Ax
to 1Bx, 2Ax to 2Bx
2A10
26
31
2B10
L
H
1 Bx
Z
1Ax
to 1Bx
2A11
27
30
2B11
H
L
Z
2 Bx
2Ax
to 2Bx
2A12
28
29
2B12
H
H
Z
Z
FUNCTION TABLE(1)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
SSOP/ TSSOP
TOP VIEW
2
Function
Disconnect
IDTQS316211
HIGH-SPEED CMOS 24-BIT 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 = 5V ± 10%
Symbol
Parameter
VIH
Input HIGH Voltage
VIL
IIN
Test Conditions
Min.
Guaranteed Logic HIGH for Control Inputs
2
Input LOW Voltage
Guaranteed Logic LOW for Control Inputs
Input Leakage Current (Control Inputs)
0V ≤ VIN ≤ VCC
Typ.(1) Max.
Unit
—
—
V
—
—
0.8
V
—
0.01
±1
µA
IOZ
Off-State Current (Hi-Z)
0V ≤ VOUT ≤ VCC, Switches OFF
—
0.01
±1
µA
RON
Switch ON Resistance(2)
VCC = Min., VIN = 0V, ION = 30mA
—
5
7
Ω
VCC = Min., VIN = 2.4V, ION = 15mA
—
10
12
VP
Pass Voltage(3)
VIN = VCC = 5V, IOUT = -5µA
3.7
4
4.2
NOTES:
1. Typical values are at VCC = 5V and TA = 25°C.
2. RON is guaranteed but not production tested.
3. Pass voltage is guaranteed but not production tested.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16
R ON
(ohms)
14
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
VIN
(Volts)
3
2.5
3.0
3.5
V
IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
Test Conditions(1)
Parameter
Max.
Unit
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC, f = 0
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 Inputs Toggling @ 50% Duty Cycle
0.25
mA/MHz
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TTL-driven input (VIN = 3.4V). 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 internal capacitance at the specified frequency. The A and B inputs generate no significant
AC or DC currents as they transition. This parameter is guaranteed but not production tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Min. (1)
Parameter
Typ.
Max.
Unit


0.25(3)
ns
tPLH
tPHL
Data Propagation Delay(2)
tPZL
tPZH
Switch Turn-On Delay
xOE to xAx, xBx
1.5

6.5
ns
tPLZ
Switch Turn-Off Delay(2)
1.5

6.2
ns
tPHZ
xOE to xAx, xBx
xAx to xBx, xBx to xAx
NOTES:
1. Minimums are guaranteed but not production tested.
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 0.25ns 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
IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C)
PV
PA
PAG
Shrink Small Outline Package
Thin Shrink Small Outline Package
TSSOP - Green
316211 High Speed CMOS 24-Bit 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
5
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[email protected]
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