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IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE
OCTOBER 2008
2000 Integrated Device Technology, Inc. DSC-5551/3c
INDUSTRIAL TEMPERATURE RANGE
FEATURES:
• Low ON resistance: rDS(ON) = 5ΩΩ
ΩΩ
Ω
• Fast transition time: tTRAN = 6ns
• Wide bandwidth: 830MHz (-3dB point)
• Crosstalk: -115dB at 50KHz, -100dB at 5MHz, -66dB at 30MHz
• Off-isolation: -90dB at 50KHz, -60dB at 5MHz, -50dB at 30MHz
• Single 5V supply
• Can be used as multiplexer or demultiplexer
• TTL-compatible control inputs
• Ultra-low quiescent current: 3μμ
μμ
μA
• Available in QSOP package
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
APPLICATIONS:
• High-speed video signal switching/routing
• HDTV-quality video signal routing
• Audio signal switching/routing
• Data acquisition
• ATE systems
• Telecomm routing
• Switch between multiple video sources
• Token Ring transceivers
• High-speed networking
FUNCTIONAL BLOCK DIAGRAM
IDTQS4A205
QUICKSWITCH® PRODUCTS
HIGH-PERFORMANCE CMOS
ANALOG FOUR-CHANNEL
SPDT MUX/DEMUX
CONTROL
LOGIC
I1D
I0D
I1C
I0C
S
I1B
I0B
I1A
I0A
YA
YB
YC
YD
E
DESCRIPTION:
The QS4A205 is a high-performance CMOS analog Four-Channel
SPDT multiplexer/demultiplexer with individual enables. The low On-
resistance of the QS4A205 allows inputs to be connected to outputs with low
insertion loss and high bandwidth. TTL-compatible control circuitry with
“Break-Before-Make” feature prevents contention.
The QS4A205 with 830MHz bandwidth makes it ideal for high-perfor-
mance video signal switching, audio signal switching, and telecomm routing
applications. High performance and low power dissipation makes this
device ideal for battery operated and remote instrumentation applications.
The QS4A205 is offered in the QSOP package and has several advan-
tages over conventional packages such as PDIP and SOIC including:
• Reduced signal delays due to denser component packaging on circuit
boards
• Reduced system noise due to less pin inductance resulting in lower
ground bounce
The QS4A205 is characterized for operation at -40°C to +85°C.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX
PIN CONFIGURATION
QSOP
TOP VIEW
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
— Analog Input Voltage –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 0.7 W
TSTG Storage Temperature –65 to +150 °C
ABSOLUTE MAXIMUM RATINGS(1)
Pin Names I/ O Description
IxA I/O Demux Port A
IxB I/O Demux Port B
IxC I/O Demux Port C
IxD I/O Demux Port D
EI Enable Input
S I Select Input
YA-YD I/O Mux Port A-D
PIN DESCRIPTION
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 .
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
Enable Select MUX/DEMUX Ports
ES YA YB YC YD Function
H X Z Z Z Z Disable
L L I0A I0B I0C I0D Select 0
L H I1A I1B I1C I1D Select 1
FUNCTION TABLE(1)
16 VCC
15 E
14 I0D
13 I1D
12 YD
11 I0C
9YC
10 I1C
S1
I0A 2
I1A 3
YA 4
I0B 5
I1B 6
GND 8
YB 7
Symbol Parameter(1) Conditions Typ. Max. Unit
CMUX (OFF) MUX Off E = VCC, VIN = VOUT = 0V 5.6 −pF
Capacitance
CDEMUX (OFF) DEMUX Off E = VCC, VIN = VOUT = 0V 7.4 −pF
Capacitance
CMUX (ON) MUX On E = 0V, VIN = VOUT = 0V 12 −pF
Capacitance
CDEMUX (ON) DEMUX On E = 0V, VIN = VOUT = 0V 15 −pF
Capacitance
CAPA CITANCE (TA = +25°C, f = 1MHz , V IN = 0V, VOUT = 0V)
NOTE:
1. As applicable to the device type.
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IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5V ± 5%
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
Analog Switch
VIN Analog Signal Range(2) –0.5 1 Vcc - 1 V
rDS(ON) Drain-source ON resistance(2,3) Vcc = Min., VIN = 0V, ION = 30mA — 5 7 Ω
Vcc = Min., VIN = 2.4V, ION = 15mA — 13 17
IC(OFF) Channel Off Leakage Current IN = Vcc or 0V; YN = 0V or Vcc; E = Vcc — 2 — nA
IC(ON) Channel On Leakage Current IN = YN = 0V — 2 — nA
(each channel is turned on sequentially)
Digital Control
VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Pins 2 — — V
VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V
Dynamic Characteristics
tTRANS Switching Time of MUX S to Y RL = 1KΩ, CL = 100pF 0.5 — 6.6 ns
tON(EN)Enable Turn-On Time, E to Y RL = 1KΩ, CL = 100pF 0.5 — 6 ns
tOFF(EN)Enable Turn-Off Time, E to Y RL = 1KΩ, CL = 100pF 0.5 — 6 ns
tPD Group Delay(2,4) RL = 1KΩ, CL = 100pF — — 250 ps
f3dB -3dB Bandwidth VIN = 1Vp-p, RL = 75Ω— 830 — MHz
Off-isolation VIN = 1Vp-p, RL = 75Ω, f = 5MHz — -60 — dB
XTALK Crosstalk VIN = 1Vp-p, RL = 75Ω, f = 5MHz — -100 — dB
QCI Charge Injection — 1.5 — pC
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Max value is guaranteed but not production tested.
3. Measured by voltage drop between A and C pins or B and D pins at indicated current through the switch. ON resistance is determined by the lower of the voltages on the
two (A, C, or B, D) pins.
4. The bus switch contributes no group delay other than the RC delay of the ON resistance of the switch and load capacitance. Group 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.
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions Max. Unit
ICCQ Quiescent Power VCC = Max., VIN = GND or VCC, f = 0 3 µA
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INDUSTRIAL TEMPERATURE RANGE
IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX
TYPICAL CHARACTERISTICS
NOTES:
1. Crosstalk = 20 log |VO/VS|
2. Off-isolation = 20 log |VO/VS|
NOTES:
1. Crosstalk = 20 log |VO/VS|
2. Off-isolation = 20 log |VO/VS|
NOTES:
1. Crosstalk = 20 log |VO/VS|
2. Off-isolation = 20 log |VO/VS|NOTE:
1. Insertion Loss = 20 log |VO/VS|
Off-isolation and Crosstalk vs. Frequency Off-isolation and Crosstalk vs. Frequency
Off-isolation and Crosstalk vs. Frequency
Insertion Loss vs. Frequency
1K 10K 100K
Frequency (Hz)
(dB)
1M 10M 100M 1G
Crosstalk
Off-isolation
150
120
90
60
30
0
VCC = 5V
RL = 75
60
50
40
30
20
10
0
VCC = 5V
RL = 75Ω
100M 200M 300M
Frequency (Hz)
(dB)
400M 500M 600M 700M
Crosstalk
Off-isolation
160
140
120
100
80
60
40
10K 20K 30K
Frequency (Hz)
(dB)
40K 50K 60K 70K
Crosstalk
Off-isolation
VCC = 5V
RL = 75Ω
4
2
0
2
4
6
1K 10K 100K
Frequency (Hz)
(dB)
1M 10M 100M 1G
RL = 1KΩ
RL = 75Ω
VCC = 5V
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IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE
TYPICAL CHARACTERISTICS (CONTINUED)
Insertion Loss vs. Frequency
On-Resistance vs. VIN
NOTE:
1. Insertion Loss = 20 log |VO/VS|
16
14
12
10
8
0.0 0.5 1.0 1.5 2.0 2.5 3.0
6
4
VIN (Volts)
r
DS(On)
- Drain Source On-resistance(Ω)
VCC = 4.75V
18
RON LINK
Transition Time
TEST CIRCUITS
2
1
0
1
2
3
4
100M 200M 300M
Frequency (Hz)
(dB)
400M 500M 600M 700M 800M 900M
RL = 1KΩ
RL = 75Ω
VCC = 5V
tTRANS tTRANS
3.0V
1.5V
0V
1.5V
SELECT
INPUT
I0A
I0B, I1B
I0D, I1D
YC
YA
5V
5V
50 Ω
500 Ω50pF
0V
GND
QS4A205
E
S
SWITCH
OUTPUT
I1A
I0C, I1C
YB
YD
VOUT
VIN
VCC
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INDUSTRIAL TEMPERATURE RANGE
IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX
Insertion Loss
NOTE:
1. Insertion Loss = 20 log |VO/VS|
Crosstalk
NOTE:
1. Crosstalk = 20 log |VO/VS|
Off-Isolation
NOTE:
1. Off-isolation = 20 log |VO/VS|
Enable Switching Time
TEST CIRCUITS (CONTINUED)
+5V
Vcc
GND
QS4A205
E
I0A
S
VS
RS = 50Ω
RL
75Ω
YO
YA
+5V
GND
QS4A205
E
I0A
IxA
IxD
S
Vcc
VIN
RS = 50Ω
RL
75Ω
YOYA
I0A
I0B, I1B
I0D, I1D
YC
YA
5V
5V
50Ω
500 50pF
0V
GND
QS4A205
E
I1A
I0C, I1C
YB
YD
S
3.0V
1.5V
0V
0.3V
0.3V
CONTROL
INPUT
OUTPUT
OUTPUT
tOFF(EN)
tON(EN)
VIN
VCC
VOUT
+5V
+5V
GND
QS4A205
E
IxA
IxD
S
Vcc
VS
RS = 50ΩRL
75Ω
YO
YA
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IDTQS4A205
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPDT MUX/DEMUX INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
QS XXXXX XX
Package
Device Type
4A205 High Performance CMOS Analog Four-Channel
SPDT MUX/DEMUX
Q
QG
Quarter Size Small Outline Package
QSOP - Green
CORPORATE HEADQUARTERS for SALES: for Tech Support:
6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 logichelp@idt.com
San Jose, CA 95138 fax: 408-284-2775
www.idt.com
