IDTQS3VH800QG [IDT]
Bus Driver, CB3Q/3VH/3C/2B Series, 1-Func, 10-Bit, True Output, PDSO24, GREEN, QSOP-24;
| 型号： | IDTQS3VH800QG |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Bus Driver, CB3Q/3VH/3C/2B Series, 1-Func, 10-Bit, True Output, PDSO24, GREEN, QSOP-24 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总8页 (文件大小：103K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 10-BIT HIGH
IDTQS3VH800
BANDWIDTH BUS SWITCH
WITH PRECHARGED OUTPUTS
DESCRIPTION:
FEATURES:
• N channel FET switches with no parasitic diode to VCC
– Isolation under power-off conditions
– No DC path to VCC or GND
The QS3VH800 HotSwitch is a high bandwidth, 10-bit bus switch. The
QS3VH800 has very low ON resistance, resulting in under 250ps propaga-
tion delay through the switch. The QS3VH800 precharges the B port to a
user selectable bias voltage (VBIAS) to minimize live insertion noise. The
switches can be turned ON under the control of the LVTTL-compatible
Output Enable (OE) signal for bidirectional data flow with no added delay
or ground bounce. In the ON state, the switches can pass signals up to 5V.
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 QS3VH800 ideal for high perfor-
mance communication applications.
– 5V tolerant in OFF and ON state
• 5V tolerant I/Os
• B port precharged to user-selectable VBIAS
• Low RON - 4Ω typical
• Flat RON characteristics over operating range
• 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
The QS3VH800 is characterized for operation from -40°C to +85°C.
• High bandwidth - up to 500MHz
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low I/O capacitance, 4pF typical
• Available in QSOP and TSSOP packages
APPLICATIONS:
• Hot-swapping
• 10/100 Base-T, Ethernet LAN switch
• Low distortion analog switch
• Replaces mechanical relay
• ATM 25/155 switching
FUNCTIONAL BLOCK DIAGRAM
VBIAS
B0
A0
A9
B9
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
SEPTEMBER 2008
1
c
2008 Integrated Device Technology, Inc.
DSC-5880/16
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
Description
Max
–0.5 to +4.6
–0.5 to +5.5
–0.5 to +5.5
–3
Unit
V
(2)
VTERM
SupplyVoltage to Ground
DC Switch Voltage VS
(3)
VTERM
V
(3)
VTERM
DC Input Voltage VIN
V
OE
A0
A1
A2
A3
A4
A5
A6
A7
A8
1
24
23
22
21
20
19
18
17
16
15
14
13
VCC
B0
VAC
IOUT
AC Input Voltage (pulse width ≤20ns)
DC Output Current (max. sink current/pin)
Storage Temperature
V
2
120
mA
°C
TSTG
–65 to +150
3
B1
NOTES:
4
B2
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.
5
B3
6
B4
2. VCC terminals.
3. All terminals except VCC .
7
B5
8
B6
9
B7
10
11
12
B8
CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT =
Symbol
Parameter(1)
Typ.
3
Max. Unit
0V)
A9
B9
CIN
Control Inputs
5
6
pF
pF
GND
VBIAS
CI/O
Quickswitch Channels (Switch OFF)
VBIAS = OPEN
4
CI/O
Quickswitch Channels (Switch ON)
8
12
pF
QSOP/ TSSOP
TOP VIEW
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
OE
I/O
I
Description
Bus Switch Enable
Bias Voltage
Bus A
VBIAS
I
A0 - A9
B0 - B9
I/O
I/O
Bus B
FUNCTION TABLE(1)
OE
B0 - B9
A0 - A9
VBIAS
Function
L
Connect
H
Disconnect A0 - A9 = Z
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
2
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
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
Input HIGH Voltage
Test Conditions
Min.
1.7
2
Typ.(1)
—
—
—
—
—
—
—
—
—
—
6
Max.
—
—
0.7
0.8
5
Unit
VIH
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
V
for Control Inputs
VIL
Input LOW Voltage
Bias Voltage
Guaranteed Logic LOW
for Control Inputs
—
—
0
V
V
VBIAS
VCC = 3V to 3.6V, IO = 0
VCC = 2.3V to 2.7V, IO = 0
0
3.3
—
±1
±1
±1
8
IO
IIN
Bias Current(2)
VCC = 3V, VBIAS = 2.4V, VO = 0, OE = HIGH
0V ≤ VIN ≤ VCC
0.25
—
—
—
—
—
—
—
mA
µA
µA
µA
Input Leakage Current (Control Inputs)
Off-State Current (Hi-Z)
IOZ
IOFF
0V ≤ VOUT ≤ 5V, Switches OFF
VIN or VOUT 0V to 5V, VCC = 0V
Data Input/Output Power Off Leakage
VCC = 2.3V
VIN = 0V
VIN = 1.7V
VIN = 0V
VIN = 2.4V
ION = 30mA
ION = 15mA
ION = 30mA
ION = 15mA
RON
Switch ON Resistance
Typical at VCC = 2.5V
VCC = 3V
7
9
Ω
4
6
5
8
NOTES:
1. Typical values are at VCC = 3.3V and TA = 25°C.
2. Bias resistance is 5kΩ typical at VCC = 3.3V; VBIAS = 2.4V, 25°C.
IN
CC
TYPICAL ON RESISTANCE vs V AT V
= 3.3V
16
14
RON
(ohms)
12
10
8
6
4
2
0
0.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1.0
0.5
VIN
(Volts)
3
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
POWER SUPPLY CHARACTERISTICS
Symbol
ICCQ
Parameter
Test Conditions(1)
Min.
—
Typ.
2
Max.
4
Unit
mA
µA
Quiescent Power Supply Current
Power Supply Current (2,3) per Input HIGH
Dynamic Power Supply Current (4)
VCC = Max., VIN = GND or VCC, f = 0
VCC = Max., VIN = 3V, f = 0 per Control Input
∆ICC
—
—
30
ICCD
VCC = 3.3V, A and B Pins Open, Control Inputs See Typical ICCD vs Enable Frequency graph below
Toggling @ 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per input driven at the specified level. A and B pins do not contribute to ∆Icc.
3. This parameter is guaranteed but not tested.
4. This parameter represents the current required to switch internal capacitance at the specified frequency. The A and B inputs do not contribute to the Dynamic Power Supply Current. This
parameter is guaranteed but not production tested.
CCD
TYPICAL I
CC
vs ENABLE FREQUENCY CURVE AT V
= 3.3V
12
10
8
6
4
2
0
0
2
4
6
8
10
12
14
16
18
20
ENABLE FREQUENCY (MHz)
4
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C
VCC = 2.5 ± 0.2V (1)
VCC = 3.3 ± 0.3V (1)
(4)
(4)
Symbol
tPLH
Parameter
Test Conditions
Min.
Max.
Min.
Max.
Unit
(2,3)
Data Propagation Delay
Ax to Bx or Bx to Ax
⎯
0.2
⎯
0.2
ns
tPHL
tPZL
tPZH
tPLZ
tPHZ
fOE
Switch Turn-On Delay
OE to Ax to Bx
VBIAS = 3V
1.5
8
7
1.5
1.5
⎯
7.5
7
ns
ns
VBIAS = GND
VBIAS = 3V
Switch Turn-Off Delay
1.5
OE to Ax to Bx
Operating Frequency - Enable(2,5)
VBIAS = GND
VBIAS = OPEN
⎯
10
20
MHz
NOTES:
1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS.
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 0.2ns 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. Minimums are guaranteed but not production tested.
5. Maximum toggle frequency for OE control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD).
5
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
NFET
0 to +5V
0 to +5V
+6.5V
Vcc = 3.3V
CHARGE PUMP
DRIVER
OE
SINGLE HOT
SWITCH
Rail-to-Rail Switching
PHY
3VH
SWITCH
4.5VPP
10Mbps to 100Mbps
>100m
LOGIC
SIDE
LOGIC
SIDE
Z = 100 Ω
Z = 100 Ω
4.5VPP
TWISTED PAIR
2VPP
Fast Ethernet Data Switching (LAN Switch)
ZERO DOWN TIME SYSTEM
PLUGGABLE CARD/ LIVE SYSTEM
ON CARD
CARD I/O
CPU
LOGIC
ON CARD
LOGIC
CARD I/O
RAM
BUS
Hot-Swapping
6
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
VIH
VT
0V
SAME PHASE
INPUT TRANSITION
(1)
(2)
Symbol
VLOAD
VIH
VCC = 3.3V ± 0.3V
VCC = 2.5V ± 0.2V
Unit
tPHL
tPHL
tPLH
tPLH
6
2 x Vcc
Vcc
V
VOH
VT
VOL
OUTPUT
3
V
VT
1.5
300
300
50
VCC/2
150
V
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
VLZ
mV
mV
pF
VHZ
150
CL
30
Propagation Delay
VLOAD
Open
GND
VCC
DISABLE
ENABLE
VIH
VT
0V
CONTROL
INPUT
500Ω
tPZL
tPLZ
VIN
VOUT
(1, 2)
Pulse
VLOAD/2
VT
D.U.T.
VLOAD/2
VOL + VLZ
VOL
OUTPUT
NORMALLY
LOW
Generator
SWITCH
CLOSED
500Ω
tPHZ
RT
tPZH
CL
VOH
VOH -VHZ
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
VT
0V
0V
Test Circuits for All Outputs
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
Enable and Disable Times
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.
SWITCH POSITION
Test
tPLZ/tPZL
tPHZ/tPZH
tPD
Switch
VLOAD
GND
Open
7
IDTQS3VH800
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 10-BIT HIGH BANDWIDTH BUS SWITCH WITH PRECHARGED OUTPUTS
ORDERING INFORMATION
Datasheet Document History
09/01/08
Pg. 4, 8
Revise ICCQ Typ. and Max. Remove non green package version and updated the ordering
information by removing the “IDT” notation.
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6024 Silver Creek Valley Road
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for Tech Support:
logichelp@idt.com
800-345-7015 or 408-284-8200
fax: 408-284-2775
www.idt.com
8
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