IDT IDTQS34X2245Q3

IDTQS34X2245
HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH 32-BIT
MULTIWIDTH™ BUS SWITCHES
FEATURES:
•
•
•
•
•
•
•
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DESCRIPTION:
Enhanced N channel FET with no inherent diode to Vcc
Bidirectional switches connect inputs to outputs
Zero propagation delay, zero ground bounce
Ω resistors for low noise
Internal 25Ω
Flow-through pinout for easy layout
Undershoot clamp diodes on all switch and control inputs
TTL-compatible control inputs
Available in 80-pin MilliPaQ™ package
The QS34X2245 is a member of the MultiWidthTM family of QuickSwitch
devices and provides a set of 32 high-speed CMOS compatible bus switches
in a flow-through pinout. This device is available in the MillipaQ package,
the worlds first small outline 32-bit solution. The low ON-resistance of the
QS34X2245 allows inputs to be connected to outputs without adding
propagation delay and without generating additional ground bounce noise.
Internal 25Ω resistors reduce reflection noise in high-speed applications.
When Output Enable (OEn) is low, the switches are turned on, connecting
bus A to bus B. When OEn is high, the switches are turned off. This device
is ideally suited for 32/64 bit applications where board space is at a premium.
QuickSwitch devices provide speeds an order of magnitude faster than
conventional logic devices.
The QS34X2245 is characterized for operation at -40°C to +85°C.
APPLICATIONS:
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•
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IDTQS34X2245
Hot-swapping, hot-docking
Voltage translation (5V to 3.3V)
Bus switching and isolation
Power conservation
Logic replacement (data processing)
Capacitance isolation
Clock gating
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
B7
B 16 B 17 B 18 B 19
B 20 B 21 B 22 B 23
A 13 A 14 A 15
A 24 A 25 A 26 A 27
A 28 A 29 A 30 A 31
B 24 B 25 B 26 B 27
B 28 B 29 B 30 B 31
OE3
OE1
B0
B1
B2
B3
B4
A8
A 9 A 10 A 11
A 12
B5
B6
OE4
OE2
B8
B 9 B 10 B 11
B 12 B 13 B 14 B 15
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
MARCH 2002
1
c
2002 Integrated Device Technology, Inc.
DSC-5556/3
IDTQS34X2245
HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES
PIN CONFIGURATION
NC
A0
1
ABSOLUTE MAXIMUM RATINGS(1)
80
79
2
INDUSTRIAL TEMPERATURE RANGE
Symbol
Description
Max
Unit
VCC
VTERM(2)
Supply Voltage to Ground
–0.5 to +7
V
OE1
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 Dissipation (TA =70°C)
1.4
W
TSTG
Storage Temperature
–65 to +150
°C
A1
3
78
B0
A2
4
77
B1
A3
5
76
B2
A4
6
75
B3
A5
7
74
B4
A6
8
73
B5
A7
9
72
B6
GND
10
71
B7
NC
11
70
VCC
A8
12
69
OE2
A9
13
68
B8
A10
14
67
B9
A11
15
66
B10
A12
16
65
B11
A13
17
64
B12
A14
18
63
B13
NOTE:
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 = 1.0MHZ, VIN = 0V, VOUT = 0V)
A15
19
62
B14
GND
20
61
B15
Pins
Typ.
Max.(1)
Unit
Control Pins
3
4
pF
7
8
pF
NC
21
60
VCC
A16
22
59
OE3
A17
23
58
B16
A18
24
57
B17
A19
25
56
B18
A20
26
55
B19
A21
27
54
B20
A22
28
53
B21
A23
29
52
B22
GND
30
51
B23
Pin Names
NC
31
50
VCC
OEn
An
Data I/Os
Bn
Data I/Os
Quickswitch Channels (Switch OFF)
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Description
Output Enable
A24
32
49
OE4
A25
33
48
B24
A26
34
47
B25
A27
35
46
B26
A28
36
45
B27
A29
37
44
B28
OEn
Outputs
A30
38
43
B29
H
Disconnected
A31
39
42
B30
L
An = Bn
GND
40
41
B31
MILLIPAQ
TOP VIEW
FUNCTION TABLE(1)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
2
IDTQS34X2245
HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
Symbol
Parameter
Test Conditions
VIH
Input HIGH Level
Guaranteed Logic HIGH for Control Pins
VIL
Input LOW Level
Guaranteed Logic LOW for Control Pins
IIN
Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC
IOZ
Off-State Output Current (Hi-Z)
Switch ON Resistance
RON(3)
VP
Pass Voltage(2)
Min.
Typ.(1)
Max.
Unit
2
—
—
V
—
—
0.8
V
—
—
±1
µA
0V ≤ VOUT ≤ VCC, Switches OFF
—
—
±1
µA
VCC = Min., VIN = 0V, ION = 30mA
VCC = Min., VIN = 2.4V, ION =15mA
VIN = VCC = 5V, IOUT = -5µA
18
18
3.7
23
25
4
35
40
4.2
Ω
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Pass Voltage is guaranteed but not production tested.
3. ROUT changed on March 8, 2002. See rear page for more information.
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
R ON
(ohms)
70
60
50
40
30
20
10
0
0.0
0.5
1.0
1.5
2.0
V IN
(Volts)
3
2.5
3.0
3.5
V
IDTQS34X2245
HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES
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
12
µA
∆ICC
Power Supply Current per Control Input HIGH (2)
VCC = Max., VIN = 3.4V, f = 0
1.5
mA
ICCD
Dynamic Power Supply Current per MHz(3)
VCC = Max., A and B pins open
0.25
mA/MHz
Control Inputs Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TLL driven input (VIN = 3.4V, control inputs 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 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 = 5.0V ± 5%;
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter
tPLH
Data Propagation Delay (1,2)
tPHL
An to/from Bn
tPZL
Switch Turn-on Delay
tPZH
OE to An/Bn
tPLZ
Switch Turn-off Delay (1)
tPHZ
OE to An/Bn
Min. (1)
Typ.
Max.
Unit
—
—
1.25
ns
0.5
—
6.6
ns
0.5
—
5.2
ns
NOTES:
1. Minimums are guaranteed but not production tested.
2. 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 1.25ns for 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
IDTQS34X2245
HIGH-SPEED CMOS QUICKSWITCH 32-BIT MULTIWIDTH BUS SWITCHES
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXXX
Device Type
XX
Package
X
Process
Blank
Industrial (-40°C to +85°C)
Q3
Q3G
80-pin Millipaq
80-pin Millipaq - Green
34X2245
High-Speed CMOS Quickswitch
32-Bit Multiwidth Bus Switches
As per PCN L0201-02, the Output Resistance (RON) specifications have changed as of March 8, 2002. The original specifications were:
Parameter
RON
Description
Min.
Typ.
Max.
Unit
VCC = Min, VIN = 0V, ION = 30mA
20
28
40
Ω
VCC = Min, VIN = 2.4V, ION = 15mA
20
35
48
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5
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