19-0673; Rev 1; 1/07
KIT
ATION
EVALU
BLE
AVAILA
Hex SPDT Data Switch
Features
♦
♦
♦
♦
♦
♦
Multiplex SDIO or Memory Stick Interfaces
1.8V to 5.5V Supply Voltage Range
Low On-Resistance 4Ω (typ)
Low-Capacitance Switches, 30pF (typ)
Rail-to-Rail Signal Handling
Small 25-Bump UCSP™ (2.5mm x 2.5mm) and
24-TQFN (4mm x 4mm)
General Description
The MAX4947/MAX4948 analog switches operate from a
single +1.8V to +5.5V supply. These switches feature a
low 30pF (typ) capacitance for high-speed data switch-
ing applications.
The MAX4947 is a triple double-pole/double-throw (DPDT)
switch, and the MAX4748 is a hex single-pole/double-
throw (SPDT) switch with one control logic input. The
MAX4947 has three logic inputs to control the switches in
pairs. The MAX4948 has one logic input and an enable
input (EN) to disable the switches.
The MAX4947/MAX4948 are available in small 24-pin
(4mm x 4mm) TQFN and 25-bump (2.5mm x 2.5mm)
chip-scale packages (UCSP™).
MAX4947/MAX4948
Ordering Information
PART
MAX4947EBA+*
MAX4947ETG+
MAX4948EBA+*
MAX4948ETG+
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
25 UCSP-25
24 TQFN-EP
25 UCSP-25
24 TQFN-EP
PKG
CODE
B25-1
T2444-4
B25-1
T2444-4
Applications
USB Signal Switching
UART Signal Switching
SDIO/Memory Stick
Cell Phones
PDAs
*
Future product—contact factory for availability.
+
Denotes lead-free package.
EP = Exposed paddle.
UCSP is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit appears at end of data sheet.
Functional Diagram
V
CC
CB12
NO1
COM1
S1
NC1
NO2
COM2
S2
NC2
CB34
NO3
COM3
S3
NC3
NO4
COM4
S4
NC4
CB56
NO5
COM5
S5
NC5
NO6
COM6
S6
NC6
COM6
EN
S6
NC6
COM5
S5
NC5
NO6
NO5
COM4
S4
NC4
COM3
S3
NC3
NO4
NO3
COM2
S2
NC2
COM1
S1
NC1
NO2
V
CC
CB
NO1
MAX4947
GND
MAX4948
GND
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Hex SPDT Data Switch
MAX4947/MAX4948
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +6.0V
All other pins to GND (Note 1) ......................-0.3V to V
CC
+ 0.3V
Continuous Current
NO_, NC_, COM_ .......................................................±100mA
Peak Current NO_, NC_, COM_
(pulsed at 1ms, 50% Duty Cycle)................................±200mA
(pulsed at 1ms, 10% Duty Cycle)................................±300mA
Continuous Power Dissipation (T
A
= +70°C)
25-Bump UCSP (derate 12.2mW/°C above +70°C) ....976mW
24-Pin TQFN (derate 20.8mW/°C above +70°C) .......1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ........................................................150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering)
Infrared (15s) ...............................................................+220°C
Vapor Phase (60s) ...........................................................+215°C
Lead Temperature (soldering) .........................................+300°C
Note 1:
Signals on CB_, NO_, NC_, COM_,
EN
exceeding V
CC
or GND are clamped by internal diodes. Limit forward-diode current
to maximum current rating.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3V, T
A
= +25°C.) (Notes 2, 3)
PARAMETER
POWER SUPPLY
Power-Supply Range
V
CC
V
CC
= 5.5V, V
CB
_ = 0V or V
CC
Power-Supply Current
ANALOG SWITCH
Analog Signal Range
V
NO
_, V
NC
_,
V
COM
_,
V
CC
= 2.7V, I
COM
_ = 10mA;
V
NC
_ or V
NO
_ = 0 or V
CC
V
CC
= 2.7V, I
COM
_ = 10mA;
V
NO
_ or V
NC
_ = 0 or V
CC
V
CC
= 2.7V, I
COM
_ = 10mA;
V
NC
_ or V
NO
_ = 0 or V
CC
T
MIN
to
T
MAX
+25°C
On-Resistance (Note 4)
R
ON
T
MIN
to
T
MAX
+25°C
On-Resistance Match Between
Channels (Notes 4, 5)
ΔR
ON
T
MIN
to
T
MAX
+25°C
On-Resistance Flatness
(Notes 4, 6)
R
FLAT
T
MIN
to
T
MAX
+25°C
NO_ or NC_ Off-Leakage
Current
I
NO
_
(OFF)
or V
CC
= 3.6V; V
COM
_ = 3.6V, 0;
I
NC
_
(OFF)
V
NO
_ or V
NC
_ = 0, 3.6V
V
CC
= 3.6V; V
COM
_ = 3.6V, 0;
V
NO
_ or V
NC
_ = 3.6V, 0 or
unconnected
T
MIN
to
T
MAX
+25°C
T
MIN
to
T
MAX
-3
-10
-6
-10
0.5
0.3
0
4.0
V
CC
5.5
6.5
0.5
0.6
1
1.2
+3
+10
+6
+10
nA
nA
Ω
Ω
Ω
V
I
CC
V
CC
= 2.7V, V
CB
_ = 1.6V or 0.5V
V
CC
= 5.5V, V
CB
_ = 1.6V or 0.5V
T
MIN
to
T
MAX
T
MIN
to
T
MAX
1.8
5.5
1.0
5
10
µA
V
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
COM_ On-Leakage Current
I
NO
_
(ON)
2
_______________________________________________________________________________________
Hex SPDT Data Switch
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3V, T
A
= +25°C.) (Notes 2, 3)
PARAMETER
COM_ Off-Leakage Current
DYNAMIC
Turn-On Time
t
ON
V
CC
= 2.7V; V
NO
_ or V
NC
_= 1.5V;
R
L
= 50Ω;
C
L
= 35pF, Figure 1
V
CC
= 2.7V; V
NO
_ or V
NC
_= 1.5V;
R
L
= 50Ω;
C
L
= 35pF, Figure 1
V
CC
= 2.7V; V
NO
_ or V
NC
_= 1.5V;
R
L
= 50Ω; C
L
= 35pF, Figure 2
(Note 7)
V
CC
= 2.7V; R
S
= 39Ω; C
L
= 50pF,
Figure 3
V
GEN
= 0, R
GEN
= 0, C
L
= 1nF ,
Figure 4
Signal = 0dBm, C
L
= 5pF,
R
L
= 50Ω, Figure 5
C
L
= 5pF; R
L
= 50Ω;
V
COM
_ = 1V
P-P
, f = 1MHz,
Figure 5 (Note 8)
C
L
= 5pF; R
L
= 50Ω; f = 1MHz,
V
COM
_ = 1V
P-P
, Figure 5 (Note 9)
NC_ = NO_ = 0V, f = 1MHz
Figure 6
V
COM
= GND, f = 1MHz
(MAX4948), Figure 6
COM_ = 0V, f = 1MHz, Figure 6
+25°C
T
MIN
to
T
MAX
+25°C
T
MIN
to
T
MAX
+25°C
T
MIN
to
T
MAX
T
MIN
to
T
MAX
+25°C
+25°C
2
100
ns
300
400
800
800
800
800
ns
ns
SYMBOL
I
COM
_
(OFF)
CONDITIONS
V
CC
= 3.6V (MAX4948);
V
COM
_ = 3.3V, 0.3V;
V
NO
_ or V
NC
_ = 0, 3V, 3.3V
T
A
+25°C
T
MIN
to
T
MAX
MIN
-6
-10
TYP
MAX
+6
+10
nA
UNITS
MAX4947/MAX4948
Turn-Off Time
t
OFF
Break-Before-Make
t
BBM
HIGH-SPEED TIMING CHARACTERISTICS (rising time = 20ns)
Skew
Charge Injection
-3dB Bandwidth
t
SKEW
Q
BW
0.2
10
300
ns
pC
MHz
Off-Isolation
V
ISO
+25°C
-70
dB
Crosstalk
NC_ or NO_ Off-Capacitance
COM_ Off-Capacitance
COM_ On-Capacitance
DIGITAL I/O (EN, CB_)
Input-Logic High
Input-Logic Low
Input Leakage Current
V
CT
C
NC
_
(OFF)
C
NO
_
(OFF)
C
COM_(OFF)
C
COM
_
(ON)
+25°C
+25°C
+25°C
+25°C
T
MIN
to
T
MAX
T
MIN
to
T
MAX
-90
15
25
30
dB
pF
pF
pF
V
IH
V
IL
I
CB
V
CB_
= 0 or V
CC
1.6
0.5
1
V
V
µA
T
MIN
to
T
MAX
_______________________________________________________________________________________
3
Hex SPDT Data Switch
MAX4947/MAX4948
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3V, T
A
= +25°C.) (Notes 2, 3)
Note 2:
The algebraic convention is used. The most negative value is shown in the minimum column.
Note 3:
UCSP parts are 100% tested at T
A
= +25°C. Limits across the full temperature range are guaranteed by correlation and
design. TQFN parts are guaranteed by correlation and design at - 40°C.
Note 4:
R
ON
and
ΔR
ON
matching specifications are guaranteed by design.
Note 5:
ΔR
ON
= R
ON(MAX)
- R
ON(MIN)
.
Note 6:
Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 7:
Guaranteed by design, not production tested.
Note 8:
Off-Isolation = 20log
10
[V
COM_
/ (V
NO_
or V
NC_
)], V
COM_
= output, V
NO_
or V
NC_
= input to off switch.
Note 9:
Between any two switches.
Typical Operating Characteristics
(V
CC
= 3V, T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
COM
MAX4947/48 toc01
ON-RESISTANCE
vs. V
COM
TEMPERATURE
MAX4947/48 toc02
ON-RESISTANCE
vs. V
COM
AND TEMPERATURE
V
CC
= 5V
4
T
A
= +85°C
R
ON
(Ω)
3
T
A
= +25°C
MAX4947/48 toc03
40
35
30
ON-RESISTANCE (Ω)
25
20
15
10
5
0
0
1
2
3
V
COM
(V)
4
5
V
CC
= 2.7V
V
CC
= 3.0V
V
CC
= 2.0V
V
CC
= 1.8V
7
V
CC
= 3V
6
5
R
ON
(Ω)
4
3
2
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
5
V
CC
= 2.3V
2
T
A
= -40°C
V
CC
= 5.0V
1
1
0
0
0.5
1.0
1.5
V
COM
(V)
2.0
2.5
3.0
0
0
1
2
3
V
COM
(V)
4
5
NO/NC OFF-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4947/48 toc04
COM ON-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4947/48 toc05
COM OFF-LEAKAGE CURRENT
vs. TEMPERATURE (MAX4748)
V
CC
= 3V/5V
COM OFF-LEAKAGE CURRENT (nA)
1
MAX4947/48 toc06
10
V
CC
= 3V/5V
NO/NC OFF-LEAKAGE CURRENT (nA)
1
10
COM ON-LEAKAGE CURRENT (nA)
V
CC
= 3V/5V
10
1
0.1
V
CC
= 5V
0.01
V
CC
= 3V
0.1
0.1
0.01
V
CC
= 5V
V
CC
= 3V
0.01
V
CC
= 5V
V
CC
= 3V
0.001
0.001
0.001
0.0001
-40
-15
10
35
60
85
TEMPERATURE (°C)
0.0001
-40
-15
10
35
60
85
TEMPERATURE (°C)
0.0001
-40
-15
10
35
60
85
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Hex SPDT Data Switch
Operating Characteristics (continued)
(V
CC
= +3V, T
A
= +25°C, unless otherwise noted.)
MAX4947/MAX4948
CHARGE INJECTION vs. V
COM
MAX4947/48 toc07
SUPPLY CURRENT vs. SUPPLY VOLTAGE
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
2
3
4
SUPPLY VOLTAGE (V)
5
6
MAX4947/48 toc08
SUPPLY CURRENT vs. TEMPERATURE
MAX4947/48 toc09
25
C
L
= 1nF
20
CHARGE INJECTION (pC)
V+ = 5V
V+ = 3V
10
100
SUPPLY CURRENT (nA)
SUPPLY CURRENT (nA)
10
15
V
CC
= 5V
V
CC
= 3V
1
5
0
0
1
2
3
V
COM
(V)
4
5
0.1
-40
-15
10
35
TEMPERATURE (°C)
60
85
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4947/48 toc10
TURN-ON/-OFF TIME
vs. SUPPLY VOLTAGE
MAX4947/48 toc11
TURN-ON/-OFF TIMES vs. TEMPERATURE
400
350
300
t
ON
/t
OFF
(ns)
250
200
150
100
50
0
t
OFF
, V+ = 5V
t
ON
, V+ = 5V
t
OFF
, V+ = 3V
t
ON
, V+ = 3V
MAX4947/48 toc12
2.0
1000
900
800
700
t
ON
/t
OFF
(ns)
450
1.6
LOGIC THRESHOLD (V)
1.2
V
IH
0.8
V
IL
600
500
400
300
t
OFF
t
ON
0.4
200
100
0
1.5
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
5.5
0
1.5
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
5.5
-40
-15
10
35
TEMPERATURE (°C)
60
85
FREQUENCY RESPONSE
MAX4947/48 toc13
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX4947/48 toc14
SUPPLY CURRENT vs. LOGIC VOLTAGE
V
CC
= 5.5V
6
SUPPLY CURRENT (μA)
5
4
3
2
1
MAX4947/48 toc15
20
0
-20
ON-LOSS (dB)
-40
-60
-80
-100
CROSSTALK
-120
-140
0.0001
OFF-ISOLATION
ON-LOSS
1
R
L
= 600Ω
7
THD+N (%)
0.1
0.01
0.01
1
100
0.01
0.1
FREQUENCY (MHz)
1
10
FREQUENCY (kHz)
100
0
0 0.5 1.0 1.6 2.0
3.0
4.0
LOGIC VOLTAGE (V)
5.0
6.0
_______________________________________________________________________________________
5
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