IDTQS3VH245SOG [IDT]
Bus Driver, CB3Q/3VH/3C/2B Series, 1-Func, 8-Bit, True Output, PDSO20, GREEN, SOIC-20;
| 型号： | IDTQS3VH245SOG |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Bus Driver, CB3Q/3VH/3C/2B Series, 1-Func, 8-Bit, True Output, PDSO20, GREEN, SOIC-20 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总8页 (文件大小：265K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QUICKSWITCH® PRODUCTS
IDTQS3VH245
2.5V / 3.3V 8-BIT HIGH
BANDWIDTH BUS SWITCH
FEATURES:
DESCRIPTION:
• N channel FET switches with no parasitic diode to VCC
– Isolation under power-off conditions
– No DC path to VCC or GND
The QS3VH245 HotSwitch 8-bit bus switch is a high bandwidth bus
switch. The QS3VH245 has very low ON resistance, resulting in under
250ps propagation delay through the switch. The switches can be turned
ON under the control of the LVTTL-compatible Output Enable signal for
bidirectional data flow with no added delay or ground bounce. In the ON
state,theswitchescanpasssignalsupto5V. IntheOFFstate,theswitches
offer very high impedence at the terminals.
– 5V tolerant in OFF and ON state
• 5V tolerant I/Os
• Low RON - 4Ω typical
• Flat RON characteristics over operating range
• Rail-to-rail switching 0 - 5V
The combination of near-zero propagation delay, high OFF impedance,
and over-voltage tolerance makes the QS3VH245 ideal forhigh perfor-
mance communications applications.
• Bidirectional dataflow with near-zero delay: no added ground
bounce
• Excellent RON matching between channels
• VCC operation: 2.3V to 3.6V
The QS3VH245 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, SOIC, and TSSOP packages
APPLICATIONS:
• Hot-swapping
• 10/100 Base-T, Ethernet LAN switch
• Low distortion analog switch
• Replaces mechanical relay
• ATM 25/155 switching
• Bus switching and isolation
FUNCTIONAL BLOCK DIAGRAM
A0
A1
A2
A3
A4
A5
A6
A7
OE
B0
B1
B2
B3
B4
B5
B6
B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEBRUARY 2014
INDUSTRIAL TEMPERATURE RANGE
1
c
2014 Integrated Device Technology, Inc.
DSC-5775/10
IDTQS3VH245
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
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
VCC
NC
1
2
3
20
19
18
17
16
15
14
13
12
11
VAC
IOUT
AC Input Voltage (pulse width ≤20ns)
DC Output Current (max. sink current/pin)
Storage Temperature
V
A0
A1
A2
OE
B0
120
mA
°C
TSTG
–65 to +150
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.
4
5
B1
B2
B3
B4
B5
B6
B7
A3
A4
6
2. VCC terminals.
3. All terminals except VCC .
A5
7
8
A6
9
A7
CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT =
10
GND
Parameter(1)
Typ.
Max. Unit
0V)
Symbol
CIN
Control Inputs
3
4
8
5
6
pF
pF
pF
CI/O
CI/O
Quickswitch Channels (Switch OFF)
Quickswitch Channels (Switch ON)
QSOP/ SOIC/ TSSOP
TOP VIEW
12
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
Description
OE
Ax
Bx
Output Enable
Data I/Os
Data I/Os
FUNCTION TABLE(1)
OE
Outputs
H
Disconnected
Ax = Bx
L
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
2
IDTQS3VH245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH 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 = 3.3V ±0.3V
Symbol
Parameter
Input HIGH Voltage
Test Conditions
Min.
1.7
2
Typ.(1) Max.
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
—
—
—
—
—
—
—
6
—
—
0.7
0.8
±1
±1
±1
8
V
for Control Inputs
Guaranteed Logic LOW
for Control Inputs
0V ≤ VIN ≤ VCC
VIL
Input LOW Voltage
—
—
—
—
—
—
—
—
—
V
IIN
IOZ
Input Leakage Current (Control Inputs)
Off-State Current (Hi-Z)
μA
μA
μA
0V ≤ VOUT ≤ 5V, Switches OFF
VIN or VOUT 0V to 5V, VCC = 0V
VCC = 2.3V
IOFF
Data Input/Output Power Off Leakage
VIN = 0V
ION = 30mA
ION = 15mA
ION = 30mA
ION = 15mA
RON
Switch ON Resistance
Typical at VCC = 2.5V
VCC = 3V
VIN = 1.7V
VIN = 0V
7
9
Ω
4
6
VIN = 2.4V
5
8
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C.
IN
CC
TYPICAL ON RESISTANCE vs V AT V
= 3.3V
16
14
RON
(ohms)
12
10
8
6
4
2
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
1.0
0.0
0.5
VIN
(Volts)
3
IDTQS3VH245
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
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
ΔICC
—
—
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 ΔIcc.
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
CC
TYPICAL I
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
IDTQS3VH245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
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
Parameter
Min.
Max.
Min.
Max.
Unit
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
Data Propagation Delay(2,3)
Ax to/from Bx
Switch Turn-On Delay
OE to Ax/Bx
Switch Turn-Off Delay
OE to Ax/Bx
Operating Frequency - Enable(2,5)
⎯
1.5
1.5
⎯
0.2
⎯
0.2
ns
8
1.5
1.5
7
ns
ns
7
6.5
fOE
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
IDTQS3VH245
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
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
IDTQS3VH245
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
VIH
VT
0V
SAME PHASE
INPUT TRANSITION
Symbol
VLOAD
VIH
VCC(1)= 3.3V ± 0.3V
VCC(2)= 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
IDTQS3VH245
INDUSTRIAL TEMPERATURE RANGE
2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH
ORDERING INFORMATION
XXXXX
XX
QS
X
Package
Device Type
Blank
8
Tube or Tray
Tape and Reel
SOG
QG
PAG
SOIC - Green
QSOP - Green
TSSOP - Green
2.5V / 3.3V 8-Bit High Bandwidth Bus Switch
3VH245
Datasheet Document History
09/01/08
Pg. 4, 8
Revise ICCQ Typ. and Max. Remove non green package version and updated the ordering
informationbyremovingthe“IDT”notation.
02/24/14
Pg. 8
UpdatedtheOrderingInformationbyAddingTapeandReelinformation.
CORPORATE HEADQUARTERS
6024 Silver Creek Valley Road
San Jose, CA 95138
for SALES:
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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