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RS2251
CMOS Single 8-Channel
Analog Multiplexer/Demultiplexer
FEATURES
•
•
•
•
•
•
•
•
-3dB Bandwidth: 180MHz
Single Supply Operation +2.5V to +5.5V
Low ON Resistance, 48Ω(TYP) With
5V Supply
High Off-Isolation: -83dB (RL = 50Ω,
f = 1MHz)
Break-Before-Make Switching
Binary Address Decoding on Chip
Operating Temperature Range:
-40° to +125°
C
C
PACKAGES: SOIC-16(SOP16), SSOP-16,
TSSOP-16 and QFN-3×3-16L
DESCRIPTION
The RS2251 is a CMOS analog IC configured as an
8-channel multiplexer. This CMOS device can
operate from 2.5 V to 5.5 V.
The RS2251 device are digitally-controlled analog
switches. It has low on-resistance (48Ω TYP) and
very low off-leakage current (1nA TYP).
The RS2251 is available in Green SOIC-16, SSOP-
16, TSSOP-16 and QFN-3×3-16L packages. It
operates over an ambient temperature range of -40°
C
to +125°
C.
Functional Diagrams of RS2251
APPLICATIONS
•
•
•
•
•
•
•
•
Sensors
Analog and Digital Multiplexing and
Demultiplexing
A/D and D/A Conversion
Signal Gating
Battery-Operated Equipment
Factory Automation
Appliances
Communications Circuits
X
EN AB LE
C
B
A
C BA
00 0
00 1
01 0
01 1
10 0
10 1
11 0
11 1
X0
X1
X2
X3
X4
X5
X6
X7
R S2 25 1
RevC.1
1
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RS2251
PIN CONFIGURATIONS
(TOP VIEW)
X6
(TOP VIEW)
X4
15
VCC
14
X
X2
13
12
X4
X6
1
2
16
15
VCC
X2
X
1
16
X1
X
X7
X5
ENABLE
NC
GND
3
4
5
6
7
8
14
13
12
11
10
9
SOIC-16(SOP16)/SSOP-16/
TSSOP-16
X1
X0
X3
X5
3
X7
X7
2
11
X0
RS2251
10
X3
A
EP
B
C
5
6
7
8
ENABLE
4
9
A
NC
GND
C
B
QFN-3×3-16L
PIN DESCRIPTION
NAME
X0-X7
X
V
CC
A
B
C
GND
NC
ENABLE
EP
PIN
(SOIC-16/SSOP-16/TSSOP-16)
13,14,15,12,1,5,2,4
3
16
11
10
9
8
7
6
—
PIN
(QFN-3×3-16L)
11,12,13,10,15,3,16,2
1
14
9
8
7
6
5
4
Exposed Pad
FUNCTION
Analog Switch Inputs X0-X7.
Analog Switch “X” Output.
Positive Analog and Digital Supply
Voltage Input
Digital Address “A” Input.
Digital Address “B” Input.
Digital Address “C” Input.
Ground. Connect to digital ground.
No Connect.
Digital Enable Input. Normally
connected to GND.
Exposed Pad. Connect EP to
GND.
FUNCTION TABLE
ENABLE
INPUT
1
0
0
0
0
0
0
0
0
INPUT STATES
C
X
0
0
0
0
1
1
1
1
B
X
0
0
1
1
0
0
1
1
A
X
0
1
0
1
0
1
0
1
ON CHANNEL(S)
NONE
X0
X1
X2
X3
X4
X5
X6
X7
X=Don’t care
NOTE: Input and output pins are identical and inter-
changeable. Either may be considered an input or
output; signals pass equally well in either direction.
2
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RS2251
ABSOLUTE MAXIMUM RATINGS
(1)
V
CC
to GND..........................................................−0.3 to 6V
Input Terminals, Voltage.
(2)
.................– 0.3 to (V+) + 0.3V
Continuous Current into Any Terminal......................±
20mA
Peak Current, X_
(Pulsed at 1ms,10% duty cycle)…………………….. ±
40mA
Storage Temperature ……….…………… −65° to +150°
C
C
Operating Temperature ……….…….…… −40° to +125°
C
C
Junction Temperature...............................................+150°
C
Package Thermal Resistance @ T
A
= +25°
C
QFN-3×3-16L………………….…………..…………. 80°
C/W
SSOP-16……….…………........................................64°
C/W
SOIC-16, TSSOP-16………….……….…………….100°
C/W
Lead Temperature (Soldering, 10s) …………….........260°
C
ESD Susceptibility
HBM ….......................................................................1000V
MM ……………………….........………………...……….100V
(1)
Stresses above these ratings may cause permanent damage. Exposure
to absolute maximum conditions for extended periods may degrade
device reliability. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those
specified is not implied.
(2)
Input terminals are diode-clamped to the power-supply rails. Input
signals that can swing more than 0.3V beyond the supply rails should
be current-limited to 10mA or less.
ESD SENSITIVITY CAUTION
ESD damage can range from subtle performance
degradation to complete device failure. Precision
integrated circuits may be more susceptible to
damage because very small parametric changes
could cause the device not to meet its published
specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT
ORDERING NUMBER
RS2251XS16
RS2251
RS2251XSS16
RS2251XTSS16
RS2251XTQC16
TEMPERATURE
RANGE
-40° ~+125°
C
C
-40° ~+125°
C
C
-40° ~+125°
C
C
-40° ~+125°
C
C
PACKAGE LEAD
SOIC-16(SOP16)
SSOP-16
TSSOP-16
QFN-3×3 -16L
PACKAGE
MARKING
RS2251
RS2251
RS2251
RS2251
PACKAGE OPTION
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,3000
3
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RS2251
ELECTRICAL CHARACTERISTICS
V
CC
= 5.0 V or 3.3V, FULL= –40° to +125° Typical values are at TA = +25° (unless otherwise noted)
C
C,
C.
PARAMETER
ANALOG SWITCH
Analog Signal Range
V
X_
，V
X
5V
On-Resistance
R
ON
3.3V
On-Resistance Match
Between Channels
On-Resistance Flatness
FULL
+25°C
FULL
+25°C
FULL
+25°C
FULL
+25°C
FULL
+25°C
+25°C
1
1
17
1.5
100
GND
48
V
CC
58
67
130
140
5
5.3
25
28
1000
1000
V
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
nA
nA
SYMBOL
CONDITIONS
V
CC
T
A
MIN
TYP
MAX UNITS
∆R
ON
5V
R
FLAT(ON)
5V
5V
3.3V
X_ Off, X Off, X On
Leakage Current
I
x_(OFF)
I
x(OFF)
I
x(ON)
DIGITAL CONTROL INPUTS
(1)
Logic Input Logic
Threshold High
Logic Input Logic
Threshold Low
Input-Current High
Input-Current Low
V
AH
, V
BH
, V
CH
,
V
̅̅̅̅̅̅̅̅̅̅̅̅
ENABLE
V
AL
, V
BL
, V
CL
V
̅̅̅̅̅̅̅̅̅̅̅̅
ENABLE
I
AH
, I
BH
, I
CH
I
̅̅̅̅̅̅̅̅̅̅̅̅
ENABLE
I
AL
, I
BL
, I
CL
I
̅̅̅̅̅̅̅̅̅̅̅̅
ENABLE
V
ENABLE
̅̅̅̅̅̅̅̅̅̅̅̅
V
ENABLE
̅̅̅̅̅̅̅̅̅̅̅̅
5V
3.3V
5V
3.3V
+25°C
+25°C
+25°C
+25°C
1.7
1.7
0.5
0.5
1
1
1000
1000
V
V
V
V
nA
nA
3.3V to 5V +25°C
3.3V to 5V +25°C
(1) All unused digital inputs of the device must be held at V
IO
or GND to ensure proper device operation.
4
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RS2251
ELECTRICAL CHARACTERISTICS (continued)
V
CC
= 5.0 V or 3.3V, FULL= –40° to +125° Typical values are at TA = +25° (unless otherwise noted)
C
C
C
PARAMETER
DYNAMIC CHARACTERISTICS
5V
Address Transition Time
t
TRANS
3.3V
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
230
65
110
80
130
50
80
60
85
60
90
6
4
-83
180
180
4.7
12.7
16
0.7
ns
ns
ns
ns
ns
ns
ns
ns
pC
pC
dB
MHz
MHz
pF
pF
pF
%
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
5V
5V
3.3V
5V
5V
5V
Ω
SYMBOL
CONDITIONS
V
CC
TEMP
MIN
TYP
MAX UNITS
+25°C
150
ns
ENABLE
Turn-On Time
ENABLE
Turn-Off Time
Internal A, B, C Rise Time
Internal A, B, C Fall Time
Break-Before-Make Time Delay
t
ON
t
OFF
t
R
t
F
t
D
Charge Injection
Off Isolation
-3dB Bandwidth
Input Off-Capacitance
Output Off-Capacitance
Output On- Capacitance
Total Harmonic Distortion
POWER REQUIREMENTS
Power Supply Range
Power Supply Current
Q
O
ISO
BW
C
X_(OFF)
C
X(OFF)
C
X(ON)
THD
5V
V
CC
I
CC
V
ENABLE
̅̅̅̅̅̅̅̅̅̅̅̅
V
ENABLE
̅̅̅̅̅̅̅̅̅̅̅̅
FULL
5V
3.3V
+25°C
+25°C
2.5
0.001
0.001
5.5
6
3
V
μA
μA
5
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