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IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1999 Integrated Device Technology, Inc. DSC-5570/2c
INDUSTRIAL TEMPERATURE RANGE
FEATURES:
• Enhanced N channel FET with no inherent diode to Vcc
•5
ΩΩ
ΩΩ
Ω bidirectional switches connect inputs to outputs
• 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 IDT logo is a registered trademark of Integrated Device Technology, Inc.
APPLICATIONS:
• Hot-swapping, hot-docking
• Voltage translation (5V to 3.3V)
• Logic replacement (data processing)
• Power conservation
• Capacitance reduction and isolation
• Bus isolation
• Clock gating
IDTQS316211
FUNCTIONAL BLOCK DIAGRAM
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
24-BIT BUS SWITCH
DESCRIPTION:
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 gener-
ating 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.
1A11B1
1A12 1B12
2B1
2B12
2A1
2A12
2OE
1OE
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH
PIN CONFIGURATION
SSOP/ TSSOP
TOP VIEW
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
1OE 2OE xA xY Function
LL1Bx 2Bx 1Ax to 1Bx, 2Ax to 2Bx
LH1Bx Z 1Ax to 1Bx
HL Z2Bx 2Ax to 2Bx
H H Z Z Disconnect
FUNCTION TABLE(1)
Pins Typ. Max. (1) Unit
Control Inputs 4.5 6 pF
Quickswitch Channels (Switch OFF) 5 . 5 7 p F
CAPA CITANCE (TA = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V)
NOTE:
1. This parameter is guaranteed but not production tested.
Pin Names I/ O Description
xA1 - xA12 I/ O Bus A
xB1 - xB12 I/ O Bus B
1OE - 2OE I Data Select
PIN DESCRIPTION
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 Dissipation (TA = 85°C) 0.93 W
TSTG Storage Temperature –65 to +150 °C
ABSOLUTE MAXIMUM RATINGS(1)
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 .
NC
GND
VCC
GND
2OE
GND
GND
47
37
38
39
40
41
42
43
44
45
46
33
34
35
36
56
55
49
50
51
52
53
54
48
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
11
21
22
23
24
29
30
31
3225
26
27
28
1B6
1B12
2B1
2B2
2B3
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1A8
1A9
1A10
1A11
1A12
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2A8
2A9
2A10
2A11
2A12
2B4
2B5
2B6
2B7
2B8
2B9
2B10
2B11
2B12
1B7
1B8
1B9
1B10
1B11
1B1
1B2
1B3
1B4
1B5
1OE
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IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
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 — 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
VPPass Voltage(3) VIN = VCC = 5V, IOUT = -5µA 3.7 4 4.2 V
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5V ± 10%
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 RESIST ANCE vs VIN AT VCC = 5V
RON
(ohms)
VIN
(Volts)
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
4
INDUSTRIAL TEMPERATURE RANGE
IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH
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.
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or V CC, 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
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol Parameter Min. (1) Typ. Max. Unit
tPLH Data Propagation Delay(2) 0.25(3) ns
tPHL xAx to xBx, xBx to xAx
tPZL Switch Turn-On Delay 1.5 6.5 ns
tPZH xOE to xAx, xBx
tPLZ Switch Turn-Off Delay(2) 1.5 6.2 ns
tPHZ xOE to xAx, xBx
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.
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IDTQS316211
HIGH-SPEED CMOS 24-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
CORPORATE HEADQUARTERS for SALES: for Tech Support:
2975 Stender Way 800-345-7015 or 408-727-6116 logichelp@idt.com
Santa Clara, CA 95054 fax: 408-492-8674 (408) 654-6459
www.idt.com
IDTQS XXXXX XX
Package
Device Type
Blank Industrial (-40°C to +85 °C)
Shrink Small Outline Package
Th in Shrink Small Outli ne Pack age
TSSOP - Gr een
PV
PA
PAG
316211 Hi gh Speed CMOS 24-Bit Bus Switch
X
Process
