Crosstalk: -110dB at 50KHz, -68dB 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: 3µA
µ
Available in QSOP package
APPLICATIONS:
•
•
•
•
•
•
•
•
•
High-speed video signal switching/routing
HDTV-quality video signal multiplexing
Audio signal switching/routing
Data acquisition
ATE systems
Telecomm routing
Switch between multiple video sources
Token Ring transceivers
High-speed networking
The QS4A210 is a high-performance CMOS two-channel SP4T multi-
plexer/demultiplexer with individual enables. The low On-resistance of the
QS4A210 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 QS4A210 with 700MHz bandwidth makes it ideal for high-perfor-
mance video signal switching, audio signal switching, and telecom routing
applications. Low power dissipation makes this device ideal for battery
operated and remote instrumentation applications.
The QS4A210 is offered in the QSOP package which has several
advantages over conventional packages such as PDIP and SOIC, includ-
ing:
• 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 QS4A210 is characterized for operation at -40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
I0A
I1A
YA
I2A
I3A
I0B
I1B
YB
I2B
I3B
S0
S1
EA
EB
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
CO NTROL
LO GIC
INDUSTRIAL TEMPERATURE RANGE
1
c
2000 Integrated Device Technology, Inc.
AUGUST 2000
DSC-5550/1
IDTQS4A210
HIGH-PERFORMANCE CMOS TWO-CHANNEL SP4T MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
EA
S
1
I3A
I2A
I1A
I0A
YA
GND
1
2
3
4
5
6
7
8
QSOP
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Supply Voltage to Ground
DC Switch Voltage V
S
Analog Input Voltage
DC Input Voltage V
IN
AC Input Voltage (pulse width
≤20ns)
DC Output Current
Maximum Power Dissipation
Storage Temperature
Max
–0.5 to +7
–0.5 to +7
–0.5 to +7
–0.5 to +7
–3
120
0.7
–65 to +150
Unit
V
V
V
V
V
mA
W
°C
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
V
CC
EB
S
0
I3B
I2B
I1B
I0B
YB
V
TERM
(2)
V
TERM
(3)
—
V
TERM
(3)
V
AC
I
OUT
P
MAX
T
STG
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. V
CC
terminals.
3. All terminals except V
CC
.
PIN DESCRIPTION
Pin Names
IxA
IxB
EA, EB
S
0
, S
1
YA, YB
I/O
I/O
I/O
I
I
I/O
Description
Demux Port A
Demux Port B
Enable Inputs
Select Inputs
Mux Port A, B
FUNCTION TABLE
(1)
Enable
EA
H
X
L
L
L
L
EB
X
H
L
L
L
L
S
1
X
X
L
L
H
H
Select
S
0
X
X
L
H
L
H
Mux/Demux
Ports
YA
Z
X
1
0
A
1
1
A
1
2
A
1
3
A
YB
X
Z
1
0
B
1
1
B
1
2
B
1
3
B
Function
Disable A
Disable B
S
1
- 0 = 0
S
1
- 0 = 1
S
1
- 0 = 2
S
1
- 0 = 3
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
2
IDTQS4A210
HIGH-PERFORMANCE CMOS TWO-CHANNEL SP4T MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= –40°C to +85°C, V
CC
= 5V ± 5%
Symbol
Analog Switch
V
IN
r
DS
(
ON
)
I
C(OFF)
I
C(ON)
Analog Signal Range
(2)
Drain-source ON resistance
(2,3)
Channel Off Leakage Current
Channel On Leakage Current
Vcc = Min., V
IN
= 0V, I
ON
= 30mA
Vcc = Min., V
IN
= 2.4V, I
ON
= 15mA
I
N
= Vcc or 0V; Y
N
= 0V or Vcc;
EA
=
EB
= Vcc
I
N
= Y
N
= 0V
(each channel is turned on sequentially)
Digital Control
V
IH
V
IL
t
TRANS
t
ON(EN)
t
OFF(EN)
t
PD
f
3dB
X
TALK
C
MUX(OFF)
C
DEMUX(OFF)
C
MUX(ON)
C
DEMUX(ON)
Q
CI
Input HIGH Voltage
Input LOW Voltage
Switching Time of Mux
Sx to Y
Enable Turn-On Time
EA
=
EB
to Y
Enable Turn-Off Time
EA
=
EB
to Y
Group Delay
(2,4)
-3dB Bandwidth
Off-isolation
Crosstalk
Mux Off Capacitance
Demux Off Capacitance
Mux On Capacitance
Demux On Capacitance
Charge Injection
Guaranteed Logic HIGH for Control Pins
Guaranteed Logic LOW for Control Pins
R
L
= 1KΩ, C
L
= 100pF
(See Transition Time)
R
L
= 1KΩ, C
L
= 100pF
(See Switching Time)
R
L
= 1KΩ, C
L
= 100pF
(See Switching Time)
R
L
= 1KΩ, C
L
= 100pF
V
IN
= 1Vp-p, R
L
= 75Ω
V
IN
= 1Vp-p, R
L
= 75Ω, f = 5.5MHz
V
IN
= 1Vp-p, R
L
= 75Ω, f = 5.5MHz
EA
=
EB
= Vcc, V
IN
= V
OUT
= 0V
EA
=
EB
= Vcc, V
IN
= V
OUT
= 0V
EA
=
EB
= 0V, V
IN
= V
OUT
= 0V
EA
=
EB
= 0V, V
IN
= V
OUT
= 0V
—
—
—
—
—
—
—
—
—
—
700
-60
-68
5.6
7.4
12
15
1.5
250
—
—
—
—
—
—
—
—
ps
MHz
dB
dB
pF
pF
pF
pF
pC
0.5
—
6
ns
0.5
—
6
ns
2
—
0.5
—
—
—
—
0.8
6.6
V
V
ns
–0.5
—
—
—
—
1
5
13
2
2
Vcc - 1
7
17
—
—
nA
nA
V
Ω
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
Dynamic Characteristics
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 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 (I, Y) 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.
射频识别(Radio Frequency Identification，RFID)技术是一种利用无线射频通信实现的非接触式自动识别技术，与目前广泛采用的条形码技术相比，RFID具有容量大、识别距离远、穿透能力强、抗污性强等特点。RFID技术已经发展得比较成熟并获得了大规模商用，但超高频RFID技术相对滞后。本文分析了射频芯片nRF9E5的功能特性，并将其用于RFID系统中，设计了一套有源超高频(...[详细]
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
