_______________General Description
The MAX333A is a precision, quad, single-pole double-
throw (SPDT) analog switch. The four independent
switches operate with bipolar supplies ranging from
4.5V to 20V, or with a single-ended supply between
+10V and +30V. The MAX333A offers low on resistance
(less than 35
), guaranteed to match within 2
between
channels and to remain flat over the analog signal range
(
3
max). It also offers break-before-make switching
(10ns typical), with turn-off times less than 145ns and
turn-on times less than 175ns. The MAX333A is ideal for
portable operation since quiescent current runs less
than 50A with all inputs high or low.
This monolithic, quad switch is fabricated with Maxim's
new improved silicon-gate process. Design improvements
guarantee extremely low charge injection (10pC), low
power consumption (3.75mW), and electrostatic discharge
(ESD) greater than 2000V.
Logic inputs are TTL and CMOS compatible and guaranteed
over a +0.8V to +2.4V range--regardless of supply voltage.
Logic inputs and switched analog signals can range any-
where between the supply voltages without damage.
________________________Applications
Test Equipment
Communications Systems
PBX, PABX
Heads-Up Displays
Portable Instruments
____________________________Features
o
Upgraded Replacement for a DG211/DG212 Pair
or Two DG403s
o
Low On Resistance < 17
Typical (35
Max)
o
Guaranteed Matched On Resistance Between
Channels < 2
o
Guaranteed Flat On Resistance over Analog
Signal Range
3
Max
o
Guaranteed Charge Injection < 10pC
o
Guaranteed Off-Channel Leakage < 6nA at +85C
o
ESD Guaranteed > 2000V per Method 3015.7
o
Single-Supply Operation (+10V to +30V)
Bipolar-Supply Operation (4.5V to 20V)
o
TTL-/CMOS-Logic Compatibility
o
Rail-to-Rail Analog Signal Handling Capability
______________Ordering Information
* Contact factory for dice specifications.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
________________________________________________________________
Maxim Integrated Products
1
INPUTS
V
1
V
2
OSC
IN
V
3
V
4
FLYING CAPACITOR
LEVEL TRANSLATOR
(2-CHANNEL)
OUTPUTS
V
1
- V
2
V
3
- V
4
__________Typical Operating Circuit
SWITCHES ARE SHOWN WITH LOGIC "0" INPUT
N.C. = NOT INTERNALLY CONNECTED
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
IN4
NO4
COM4
NC4
NC1
COM1
NO1
IN1
MAX333A
V+
N.C.
NC3
COM3
COM2
NC2
GND
V-
NO3
IN3
IN2
NO2
TOP VIEW
DIP/SO/TSSOP
__________________Pin Configuration
PART
TEMP. RANGE
PIN-PACKAGE
MAX333ACPP
0C to +70C
20 Plastic DIP
MAX333ACWP
0C to +70C
20 Wide SO
MAX333ACUP
0C to +70C
20 TSSOP
MAX333AEPP
-40C to +85C
20 Plastic DIP
MAX333AEWP
-40C to +85C
20 Wide SO
MAX333AEUP
-40C to +85C
20 TSSOP
19-0189; Rev 1; 6/99
MAX333AC/D
0C to +70C
Dice*
MAX333AMJP
-55C to +125C
20 CERDIP
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V+ to V- ..................................................................................44V
V
IN
, V
COM
, V
NO
, V
NC
......................................................V- to V+
(V
NO
- V
NC
) ............................................................................32V
V+ to Ground..........................................................................30V
V- to Ground..........................................................................-30V
Current, Any Terminal Except V
COM
, V
NO
, or V
NC
.............30mA
Continuous Current, V
COM
, V
NO
, or V
NC
............................20mA
Peak Current, V
COM
, V
NO
, or V
NC
(Pulsed at 1ms, 10% duty cycle max) ............................70mA
ESD ....................................................................................2000V
Continuous Power Dissipation (T
A
= +70C) (Note 1)
Plastic DIP (derate above +70C by 11.11mW/C) .....889mW
SO (derate above +70C by 10.00mW/C) ..................800mW
CERDIP (derate above +70C by 11.11mW/C) ..........889mW
TSSOP (derate above +70C by 7mW/C) ..................559mW
Operating Temperature Ranges:
MAX333AC_ _ .....................................................0C to +70C
MAX333AE_ _ ..................................................-40C to +85C
MAX333AMJP ................................................-55C to +125C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
ELECTRICAL CHARACTERISTICS--Dual Supplies
(GND = 0V, V+ = +15V, V- = -15V, T
A
= +25C, unless otherwise noted.)
Note 1:
Device mounted with all leads soldered to PC board.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and function-
al 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.
PARAMETER
SYMBOL
MIN
TYP
MAX
(Notes 2, 3)
UNITS
Input Voltage Low
V
IL
V-
0.8
V
Negative Supply Current
I-
0.01
1
A
V+
10
30
Input Voltage High
V
IH
2.4
V+
V
Input Current
I
IN
-1.0
0.0001
1.0
A
Analog Signal Range
V
COM,
V
NO,
V
NC
V-
V+
V
Positive Supply Current
I+
0.05
0.25
mA
Supply Voltage Range
V+/V-
4.5V
20
V
On Circuit Resistance
R
ON
20
35
On Resistance Match
Between Channels (Note 4)
R
ON
On Resistance Flatness
(Note 4)
R
ON
I
(NC
or
NO)
= -10mA, V
D
= 5V
or -5V, V+ =15V, V- = -15V
On Circuit Leakage
Current
I
COM
-0.75
0.75
nA
Off Circuit Leakage
Current
I
NC
or
I
NO
-0.25
0.01
0.25
nA
Turn-Off Time
t
OFF
145
ns
Turn-On Time
t
ON
175
ns
Break-Before-Make Time
t
OPEN
10
ns
Off Capacitance
C
OFF
5
pF
On Capacitance
C
ON
5
pF
Charge Injection
Q
2
10
pC
OIRR
72
dB
CONDITIONS
V
IN
= 0V/5V,V+ = 16.5V, V- = -16.5V
Single supply, V- = GND
V
IN
= V-, V+
Figure 1
V
IN
= 0V/5V,V+ = 16.5V, V- = -16.5V
Dual supply,
V+
=
V-
C
L
= 10nF, V
GEN
= 0V,
R
GEN
= 0
, Figure 6
f = 1MHz, RL = 75
,
V
COM
= 2.3V
RMS
CCRR
78
dB
V
COM
= +10V, I
(NC
or
NO)
= 1mA;
V
COM
= -10V, I
(NC
or
NO)
= 1mA
2
T
A
= +25C
3
M
T
A
= +25C
V
COM
= 15.5V, V
NC
or V
NO
= +15.5V,
V+ = 16.5V, V- = -16.5V
V
COM
= 15.5V V
NC
or V
NO
= +15.5V,
V+ = 16.5V, V- = -16.5V
M
M
T
A
= T
MIN
to T
MAX
T
A
= T
MIN
to T
MAX
C, E
C, E
C, E
T
A
= +25C
45
4
5
-1.00
0.20
1.00
-0.50
0.02
0.05
Off Isolation
Crosstalk
I
(NC
or
NO)
= -10mA, V
D
= 10V
or -10V, V+ =15V, V- = -15V
POWER REQUIREMENTS
LOGIC INPUT
SWITCH
DYNAMIC
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICSDUAL SUPPLIES (continued)
(GND = 0V, V+ = +15V, V- = -15V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS--Single Supply
(GND = 0V, V+ = +12V, V- = 0V, T
A
= +25C, unless otherwise noted.)
PARAMETER
SYMBOL
MIN
TYP
MAX
(Notes 2, 3)
UNITS
On Circuit Resistance
R
ON
45
Analog Signal Range
V
COM
V-
V+
V
Input Current
I
IN
-1.0
0.0001
1.0
A
On Circuit Leakage Current
I
COM
-10
10
nA
On Circuit Leakage Current
I
NC
or I
NO
-6
6
nA
Input Voltage Low
V
IL
V-
0.8
V
Input Voltage High
V
IH
2.4
V+
V
CONDITIONS
V
IN
= V-, V+
PARAMETER
Off Circuit Leakage Current
SYMBOL
MIN
TYP
MAX
(Notes 2, 3)
I
NC
or
I
NO
0.25
UNITS
Input Current
I
IN
nA
1
A
Input Voltage High
V
INHI
2.4
V+
V
Input Voltage Low
V
INLO
0
0.8
V
Turn-Off Time
Analog Signal Range
V
COM
,
V
NO
, V
NC
V-
V+
V
t
OFF
45
ns
Turn-On Time
On Circuit Resistance
t
ON
r
ON
35
75
90
On Circuit Leakage Current
ns
I
COM
0.75
nA
Break-Before-Make Time
t
OPEN
5
10
ns
Off Isolation
Supply Voltage Range
OIRR
70
dB
Crosstalk
CCRR
72
dB
V
+
10
30
V
Positive Supply Current
l+
0.25
mA
CONDITIONS
V
COM
= 11V
V
NC
or V
NO
= 1V
V
IN
= V+, 0V
Figure 1
V
COM
= 10V, I(
NC
or
NO)
= 1mA,
V
COM
= 1V, I(
NC
or
NO)
= 1mA
V
COM
= 11V, V
NC
or V
NO
= 0V
V
COM
= 1V, V
NC
or V
NO
= V+
f = 1MHz, R
L
= 75
, V
COM
= 2.3V
RMS
Single supply, V- = GND
V
COM
= 10V, I
(NC
or
NO)
= 1mA;
V
COM
= -10V, I
(NC
or
NO
= 1mA
V
COM
= 15V, V
NC
or V
NO
= -15V,
V+ = 16.5V, V- = -16.5V
V
COM
= 15V, V
NC
or V
NO
= -15V,
V+ = 16.5V, V- = -16.5V
C, E
C, E
C, E
M
M
M
45
-60
60
Note 2:
The algebraic convention, whereby the most negative value is a minimum and the most positive is a maximum, is used in
this data sheet.
Note 3:
Typical values are for design aid only, not guaranteed or subject to production testing.
Note 4:
On resistance match between channels and flatness are guaranteed only with bipolar-supply operation.
LOGIC INPUT
SWITCH
DYNAMIC
SWITCH
INPUT
SUPPLY
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted).
45
5
-20
-10
10
ON RESISTANCE
vs. V
COM
AND POWER SUPPLY VOLTAGE
15
35
MAX333A-01
V
COM
(V)
R
ON
(
)
0
20
25
40
10
30
20
50
A
B
C
D
A: V+ = 5V,
V- = -5V
B: V+ = 10V,
V- = -10V
C: V+ = 15V,
V- = -15V
D: V+ = 20V,
V- = -20V
5
-20
-10
10
ON RESISTANCE
vs. V
COM
AND TEMPERATURE
30
MAX333A-02
V
COM
(V)
R
ON
(
)
0
20
20
10
25
15
35
V+ = 15V
V- = -15V
T
A
= +125C
+85C
+25C
-55C
20
0
5
15
ON RESISTANCE
vs. V
COM
AND TEMPERATURE
120
MAX333A-03
V
COM
(V)
R
ON
(
)
10
20
80
40
100
60
140
V- = 0V
V+ = 5V
V+ = 10V
V+ = 15V
V+ = 20V
10
0
5
15
ON RESISTANCE
vs. V
COM
AND SINGLE SUPPLY
60
MAX333A-04
V
COM
(V)
R
ON
(
)
10
20
40
20
50
30
70
V+ = 12V
V- = 0V
T
A
= +125C
T
A
= +85C
T
A
= +25C
-75
-20
CHARGE INJECTION vs. V
COM
50
MAX333A-07
V
COM
(V)
Q (pC)
0
20
0
-50
25
-25
75
-15 -10
-5
5
10
15
V
SUPPLY
= +15V
0.0001
-55
OFF LEAKAGE CURRENTS
vs. TEMPERATURE
10
MAX333A-05
TEMPERATURE (C)
OFF LEAKAGE
+25
+125
0.1
0.001
1
0.01
100
V+ = 16.5V
V- = -16.5V
V
COM
= 15V
V
NC
OR V
NO
= 15V
0.0001
-55
ON LEAKAGE CURRENTS
vs. TEMPERATURE
10
MAX333A-06
TEMPERATURE (C)
ON LEAKAGE
+25
+125
0.1
0.001
1
0.01
100
V+ = 16.5V
V- = -16.5V
V
COM
= 15V
V
NC
OR V
NO
= 15V
0.0001
-55
SUPPLY CURRENT vs. TEMPERATURE
10
MAX333A-08
TEMPERATURE (C)
I+, I-, I
L
(
A)
+25
+125
0.1
0.001
1
0.01
100
I+ AT V+ = +16.5V
I- AT V+ = +16.5V
__________Applications Information
Operation with Supply Voltages
Other than 15V
o
The main limitation of supply voltages other than 15V is
a reduction in the analog signal range. The MAX333A
operates with 5V to 20V bipolar supplies. The
Typical Operating Characteristics and graphs show typ-
ical on resistance for 15V, 10V, 5 supplies.
Switching times increase by a factor of two or more for
5V operation. The MAX333A can operate from +10V
to +24V unipolar supplies. It can be powered from a
single +10V to +24V supply, as well as from unbalanced
supplies such as +24V and -5V. Connect V- to 0V when
operating with a single supply.
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. It is important not to exceed the
absolute maximum ratings because stresses beyond
the listed ratings may cause permanent damage to the
devices. Always sequence V+ on first, followed by VL,
V-, and logic inputs. If power-supply sequencing is not
possible, add two small signal diodes in series with the
supply pins (Figure 1). Adding the diodes reduces the
analog signal range to 1V below V+ and 1V below V-,
but low switch resistance and low leakage characteris-
tics are unaffected.
MAX333A
Precision, Quad, SPDT, CMOS Analog Switch
_______________________________________________________________________________________
5
PIN
FUNCTION
15
Not Internally Connected
6
Ground
5
Negative Power Supply
4, 7, 14, 17
Normally Closed Switches
16
Positive Power Supply
1, 10, 11, 20
Logic-Level Inputs
2, 9, 12, 19
Normally Open Switches
3, 8, 13, 18
Common Switch Poles
NAME
N.C.
GND
V-
NC1-NC4
V+
IN1-IN4
NO1-NO4
COM1-COM4
_____________________Pin Description
t
R
< 20ns
t
F
< 20ns
50%
0V
+10V
LOGIC
INPUT
V-
-15V
300
COM_
GND
(REPEAT TEST FOR IN2, IN3, AND IN4.)
V
IN
+10V
IN_
NO_
50%
t
OPEN
50%
50%
50%
50%
3V
t
OPEN
t
ON
t
OFF
t
ON
t
OFF
0V
-10V
V
COM
+15V
V+
NC_
-10V
SWITCH OUTPUT
Figure 2. Switching-Time Test Circuit
V
g
NO_
( OR NC_)
V+
COM_
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
______________________________________________Test Circuits/Timing Diagrams
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