IDT IDTQS3VH16861PV

IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS 2.5V/
IDTQS3VH16861
3.3V 20-BIT FLOW-THROUGH PIN OUT,
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
− 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 SSOP and TSSOP packages
The QS3VH16861 HotSwitch with 20-bit flow-though pin out is a high
bandwidth bus switch. The QS3VH16861 has very low ON resistance,
resulting in under 250ps propagation delay through the switch. The switches
are controlled by active low enable (BEx) controls. 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 QS3VH16861 ideal for high performance communications applications.
The QS3VH16861 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
A9
B9
A 19
B 19
BE 1
BE2
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 2001
1
c
2001 Integrated Device Technology, Inc.
DSC-5875/3
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, HIGH BANDWIDTH BUS SWITCH
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
NC
1
INDUSTRIAL TEMPERATURE RANGE
48
VCC
A0
2
47
BE1
A1
3
46
B0
A2
4
45
B1
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
Symbol
Description
Max.
Unit
VTERM(2)
Supply Voltage to Ground
– 0.5 to 4.6
V
VTERM(3)
DC Switch Voltage VS
– 0.5 to 5.5
V
VTERM(3)
DC Input Voltage VIN
– 0.5 to 5.5
V
–3
V
120
mA
-65 to +150
°C
VAC
AC Input Voltage (pulse width ≤20ns)
IOUT
DC Output Current (max. current/pin)
TSTG
Storage Temperature
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
Symbol
Parameter(1)
o
(TA = +25 C, f = 1MHz, VIN = 0V, VOUT = 0V)
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
NC
13
36
VCC
A10
14
35
BE2
A11
15
34
B10
A12
16
33
B11
A13
17
32
B12
A14
18
31
B13
Pin Names
A15
19
30
B14
BEx
A16
20
29
B15
A17
21
28
B16
A18
22
27
B17
A19
23
26
B18
BE1
BE2
A0 - A9
A10 - A19
Function
GND
24
25
B19
L
L
B0 - B9
B10 - B19
Connect
L
H
B0 - B9
Z
NOTE:
1. This parameter is guaranteed but not production tested.
PIN DESCRIPTION
Description
Active LOW Bus Enable
A0 - A19
Bus A
B 0 - B19
Bus B
FUNCTION TABLE(1)
Connect B0 - B9,
Disconnect B10 - B19
SSOP/ TSSOP
TOP VIEW
H
L
Z
B10 - B19
Disconnect B0 - B9,
Connect B10 - B19
H
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedence
2
Z
Z
Disconnect
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE(1)
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)
IOZ
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
VIN
(Volts)
3
3.0
3.5
4.0
4.5
5.0
Ω
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, 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
∆ICC
Power Supply Current
ICCD
Dynamic Power Supply Current(4)
Symbol
(2,3)
per Input HIGH
Min.
Typ.
Max.
Unit
—
1.5
3
mA
—
—
30
µA
VCC = Max., VIN = 3V, f = 0 per Control Input
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.
TYPICAL ICCD vs ENABLE FREQUENCY CURVE AT VCC = 3.3V
14
12
ICCD (mA)
10
8
6
4
2
0
0
2
4
6
8
10
12
14
ENABLE FREQUENCY (MHz)
4
16
18
20
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, 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
Parameter
Min. (4)
VCC = 3.3 ± 0.3V (1)
Min. (4)
Max.
Data Propagation Delay(2,3)
A to B or B to A

0.2

Unit
tPLH
tPHL
0.2
ns
tPZH
tPZL
Switch Turn-On Delay
BEx to xA or xB
1.5
8.5
1.5
8
ns
tPHZ
tPLZ
Switch Turn-Off Delay
BEx to xA or xB
1.5
7.5
1.5
7.5
ns
fBEx
Operating Frequency - Enable (2,5)

10

20
MHz
Max.
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
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, 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
4.5V PP
LOGIC
SIDE
10M bps to 100Mbps
Z = 100 Ω
Z = 100 Ω
>100m
4.5V PP
TWISTED PAIR
LOGIC
SID E
2V PP
Fast Ethernet Data Switching (LAN Switch)
ZERO DOWN TIME SYSTEM
PLUGGABLE CARD/ LIVE SYSTEM
CARD I/O
ON CARD
LOGIC
CONN ECTOR
QS3VH XXX
CARD I/O
ON CARD
LOGIC
C ON NEC TOR
QS3VH XX X
Hot Swapping
6
CPU
RAM
BUS
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, 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
SAM E PHAS E
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
t PLH
t PH L
t PLH
t PHL
V IH
VT
0V
V OH
VT
V OL
V IH
VT
0V
OPPOSITE PHASE
INPUT TRANSITIO N
Propagation Delay
V LOAD
V CC
500 Ω
(1, 2)
Pulse
G enerator
V IN
CONTROL
INPUT
GND
t PZL
V OUT
D.U.T.
RT
DISABLE
ENABLE
Open
OUTPUT
SW ITCH
NORMALLY
CLOSED
LOW
t PZH
OUTPUT SW ITCH
NO RM ALLY
OPEN
HIGH
500 Ω
CL
Test Circuits for All Outputs
SWITCH POSITION
tPLZ/tPZL
VLOAD
tPHZ/tPZH
GND
tPD
Open
V LO AD/2
V L O A D /2
VT
V OL
V OL
t PH Z
+
V LZ
VT
VOH
V O H -V H Z
0V
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
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
t PLZ
V IH
VT
7
IDTQS3VH16861
2.5V / 3.3V 20-BIT FLOW-THROUGH PIN OUT, HIGH BANDWIDTH BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS
XXXXX
Device Type
XX
Package
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
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PA
PAG
Shrink Small Outline Package
Thin Shrink Small Outline Package
TSSOP - Green
3VH16861
2.5V / 3.3V 20-Bit Flow Though Pin Out, High
Bandwidth Bus Switch
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
8
for Tech Support:
[email protected]
(408) 654-6459