IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
2.5V / 3.3V 20-BIT DUAL PORT,
HIGH BANDWIDTH BUS SWITCH
FEATURES:
IDTQS3VH16862
DESCRIPTION:
• N channel FET switches with no parasitic diode to Vcc
− Isolation under power-off conditions
− No DC path to Vcc or GND
− 5V tolerant in OFF and ON state
• 5V tolerant I/Os
Ω typical
• Low RON - 4Ω
• 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
• High bandwidth - up to 500 MHz
• LVTTL-compatible control Inputs
• Undershoot Clamp Diodes on all switch and control Inputs
• Low I/O capacitance, 4pF typical
• Available in TSSOP package
The QS3VH16862 HotSwitch with 20-bit dual port is a high bandwidth
bus switch. The QS3VH16862 has very low ON resistance, resulting in
under 250ps propagation delay through the switch. The switches are
controlled by independent active low enable (BEx) LVTTL compatible
control inputs. 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 QS3VH16862 ideal for high performance communications applications.
The QS3VH16862 is characterized for operation from -40°C to +85°C.
APPLICATIONS:
•
•
•
•
•
Hot-swapping
10/100 Base-T, Ethernet LAN switch
Low distortion analog switch
Replaces mechanical relay
ATM 25/155 switching
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A 10
B 10
A4
B4
A 14
B 14
BE3
BE1
A5
B5
A 15
B 15
A9
B9
A 19
B 19
BE4
BE2
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
c
2013 Integrated Device Technology, Inc.
JUNE 2013
1
DSC-5879/7
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
Description
Max.
Unit
VTERM(2)
Supply Voltage to Ground
– 0.5 to 4.6
V
V
BE2
1
48
VCC
VTERM(3)
DC Switch Voltage VS
– 0.5 to 5.5
A0
2
47
BE1
VTERM(3)
DC Input Voltage VIN
– 0.5 to 5.5
V
A1
3
46
B0
–3
V
A2
4
45
120
mA
-65 to +150
°C
VAC
AC Input Voltage (pulse width ≤20ns)
B1
IOUT
DC Output Current (max. current/pin)
TSTG
Storage Temperature
A3
5
44
B2
A4
6
43
B3
A5
7
42
B4
A6
8
41
B5
A7
9
40
B6
A8
10
39
B7
A9
11
38
B8
GND
12
37
B9
BE4
13
36
VCC
A10
14
35
A11
15
34
BE3
B10
A12
16
33
B11
A13
17
32
B12
A14
18
31
B13
A15
19
30
B14
A16
20
29
B15
A17
21
28
B16
A18
22
27
B17
A0 - A19
Bus A
A19
23
26
B18
B 0 - B19
Bus B
GND
24
25
B19
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
o
(TA = +25 C, f = 1MHz, VIN = 0V, VOUT = 0V)
Symbol
Parameter(1)
Typ.
Max.
Unit
CIN
Control Inputs
3
5
pF
CI/O
Quickswitch Channels (Switch OFF)
4
6
pF
CI/O
Quickswitch Channels (Switch ON)
8
12
pF
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Pin Names
BEx
Description
Bus Enable Inputs (Active LOW)
TSSOP
TOP VIEW
FUNCTION TABLE(1)
BEx
A0 - A19
Function
H
Z
Disconnect
L
B0 - B19
Connect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
2
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, 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
VIH
Parameter
Test Conditions
Input HIGH Voltage
VIL
Input LOW Voltage
IIN
Input Leakage Current (Control Inputs)
I OZ
IOFF
Typ.(1)
Max.
Unit
V
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
1.7
—
—
for Control Inputs
VCC = 2.7V to 3.6V
2
—
—
Guaranteed Logic HIGH
VCC = 2.3V to 2.7V
—
—
0.7
for Control Inputs
VCC = 2.7V to 3.6V
—
V
—
0.8
—
—
±1
μA
Off-State Current (Hi-Z)
≤ VCC
0V ≤ VOUT ≤ 5V, Switches OFF
—
—
±1
μA
Data Input/Output Power Off Leakage
VIN or VOUT 0V to 5V, VCC = 0V
—
—
±1
μA
ION = 30mA
—
6
8
(Typ. at VCC = 2.5V) VIN = 1.7V
ION = 15mA
—
7
9
VCC = 3V
VIN = 0V
ION = 30mA
—
4
6
VIN = 2.4V
ION = 15mA
—
5
8
0V ≤ VIN
VCC = 2.3V
RON
Min.
Switch ON Resistance
VIN = 0V
NOTE:
1. Typical values are at VCC = 3.3V and TA = 25°C, unless otherwise noted.
TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V
16
R ON
14
(ohms)
12
10
8
6
4
2
0
0.0
0.5
1.0
1.5
2.0
2.5
V IN
(Volts)
3
3.0
3.5
4.0
4.5
5.0
Ω
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Parameter
Test Conditions(1)
ICCQ
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC, f = 0
ΔICC
Power Supply Current
ICCD
Dynamic Power Supply Current(4)
Symbol
(2,3)
per Input HIGH
VCC = Max., VIN = 3V, f = 0 per Control Input
VCC = 3.3V, A and B Pins Open, Control Inputs
Min.
Typ.
Max.
Unit
—
1.5
3
mA
—
—
30
μA
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.
TYPICAL ICCD vs ENABLE FREQUENCY CURVE AT VCC = 3.3V
20
18
16
ICCD (mA)
14
12
10
8
6
4
2
0
0
2
4
6
8
10
12
ENABLE FREQUENCY (MHZ)
4
14
16
18
20
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C
VCC = 2.5 ± 0.2V (1)
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
fBEx
Parameter
Data Propagation Delay(2,3)
A to B or B to A
Switch Turn-On Delay
BEx to xA or xB
Switch Turn-Off Delay
BEx to xA or xB
Operating Frequency - Enable (2,5)
Min. (4)
⎯
VCC = 3.3 ± 0.3V (1)
Max.
Min. (4)
Max.
Unit
0.2
⎯
0.2
ns
1.5
8
1.5
8
ns
1.5
7.5
1.5
7.5
ns
⎯
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 BEx control input (pass voltage > VCC, VIN = 5V, RLOAD > 1MΩ, no CLOAD).
5
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SOME APPLICATIONS FOR HOTSWITCH PRODUCTS
NFET
0 to +5V
Vcc = 3.3V
+6.5V
CHARGE PUMP
OE
0 to +5V
DRIVER
SINGLE HOT
SWITCH
Rail-to-Rail Switching
PHY
3VH
SWITCH
4.5VPP
10Mbps to 100Mbps
Z = 100 Ω
LOGIC
SIDE
Z = 100 Ω
>100m
4.5VPP
TWISTED PAIR
LOGIC
SIDE
2VPP
Fast Ethernet Data Switching (LAN Switch)
ZERO DOWN TIME SYSTEM
PLUGGABLE CARD/ LIVE SYSTEM
CARD I/O
ON CARD
LOGIC
CONNECTOR
QS3VHXXX
CPU
CARD I/O
ON CARD
LOGIC
CONNECTOR
QS3VHXXX
RAM
BUS
Hot Swapping
6
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
VCC(1)= 3.3V ± 0.3V
VCC(2)= 2.5V ± 0.2V
Unit
VLOAD
6
2 x Vcc
V
SAME PHASE
INPUT TRANSITION
VIH
3
Vcc
V
OUTPUT
VT
1.5
VCC/2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
tPLH
tPHL
tPLH
tPHL
VIH
VT
0V
VOH
VT
VOL
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
Propagation Delay
VLOAD
VCC
500Ω
Pulse(1, 2)
Generator
VIN
CONTROL
INPUT
GND
tPZL
VOUT
D.U.T.
RT
DISABLE
ENABLE
Open
OUTPUT
SWITCH
NORMALLY
CLOSED
LOW
tPZH
OUTPUT SWITCH
NORMALLY
OPEN
HIGH
500Ω
CL
Test Circuits for All Outputs
SWITCH POSITION
tPLZ/tPZL
VLOAD
tPHZ/tPZH
GND
tPD
Open
tPHZ
VT
0V
Enable and Disable Times
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2ns; tR ≤ 2ns.
Switch
VLOAD/2
VT
VLOAD/2
VOL + VLZ
VOL
VOH
VOH -VHZ
0V
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Test
tPLZ
VIH
VT
0V
7
IDTQS3VH16862
2.5V / 3.3V 20-BIT DUAL PORT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
QS
XXXXX
XX
Device Type Package
X
Blank
8
Tube or Tray
Tape and Reel
PAG
Thin Shrink Small Outline Package-TSSOP Green
3VH16862
2.5V / 3.3V 20-Bit Dual Port High Bandwidth Bus Switch
Datasheet Document History
06/10/2013
Pg. 1, 8
Updated the Ordering Information by removing non green package version, the “IDT” notation and
Adding Tape and Reel information.
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www.idt.com
8
for Tech Support:
logichelp@idt.com
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