19-0271; Rev 2; 8/02
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
_______________General Description
The MAX308/MAX309 precision, monolithic, CMOS ana-
log multiplexers (muxes) offer low on-resistance (less
than 100Ω), which is matched to within 5Ω between
channels and remains flat over the specified analog sig-
nal range (7Ω max). They also offer low leakage over
temperature (NO-off leakage current less than 5nA at
+85°C) and fast switching speeds (transition time less
than 250ns). The MAX308 is a single-ended 1-of-8
device, and the MAX309 is a differential 2-of-4 device.
The MAX308/MAX309 are fabricated with Maxim’s
improved 44V silicon-gate process. Design improve-
ments yield extremely low charge injection (less than
10pC) and guarantee electrostatic discharge protection
greater than 2000V.
These muxes operate with a single +5V to +30V supply
or bipolar ±5V to ±20V supplies, while retaining
TTL/CMOS-logic input compatibility and fast switching.
CMOS inputs provide reduced input loading. These
improved parts are plug-in upgrades for the industry-
standard DG408, DG409, DG508A, and DG509A.
____________________________Features
o
Guaranteed On-Resistance Match Between
Channels, <5Ω Max
o
Low On-Resistance, <100Ω Max
o
Guaranteed Flat On-Resistance over Specified
Signal Range, 7Ω Max
o
Guarateed Low Charge Injection, <10pC
o
NO-Off Leakage Current <5nA at +85°C
o
COM-Off Leakage Current <20nA at +85°C
o
ESD Protection >2000V
o
Plug-In Upgrade for Industry-Standard
DG408/DG409/DG508A/DG509A
o
Single-Supply Operation (+5V to +30V)
Bipolar-Supply Operation (±5V to ±20V)
o
Low Power Consumption, <300µW
o
Rail-to-Rail Signal Handling
o
TTL/CMOS-Logic Compatible
MAX308/MAX309
______________Ordering Information
PART
MAX308CPE
MAX308CSE
MAX308C/D
MAX308CUE
MAX308EPE
MAX308ESE
MAX308EJE
MAX308EUE
MAX308MJE
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
16 TSSOP
16 Plastic DIP
16 Narrow SO
16 CERDIP
16 TSSOP
16 CERDIP**
________________________Applications
Sample-and-Hold Circuits
Automatic Test Equipment
Heads-Up Displays
Guidance and Control Systems
Military Radios
Communications Systems
Battery-Operated Systems
PBX, PABX
Audio Signal Routing
Ordering Information continued at end of data sheet.
*Contact
factory for dice specifications.
**Contact
factory for availability.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
A0
1
EN
2
V-
3
NO1
4
NO2
5
NO3
6
NO4
7
COM
8
16
A1
15
A2
14
GND
NO1
NO2
NO3
NO4
NO5
NO6
NO7
NO8
CMOS DECODE LOGIC
COM
V+
V-
GND
MAX308
13
V+
12
NO5
11
NO6
10
NO7
9
NO8
DIP/SO/TSSOP
Continued at end of data sheet.
A2
A1
A0
EN
MAX308 8-CHANNEL SINGLE-ENDED MULTIPLEXER
________________________________________________________________
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.
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
MAX308/MAX309
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to V-
V+ ............................................................................-0.3V, 44V
GND .........................................................................-0.3V, 25V
Digital Inputs, NO, COM (Note 1)...........(V- - 2V) to (V+ + 2V) or
30mA, (whichever occurs first)
Continuous Current (any terminal) ......................................30mA
Peak Current, NO or COM
(pulsed at 1ms, 10% duty cycle max) ..........................100mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW
Narrow SO (derate 8.70mW/°C above +70°C) ............696mW
CERDIP (derate 10.00mW/°C above +70°C) ...............800mW
TSSOP (derate 6.7mW/°C above +70°C) ....................457mW
Operating Temperature Ranges
MAX30_C_ _ .......................................................0°C to +70°C
MAX30_E_ _.....................................................-40°C to +85°C
MAX30_MJE ..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1:
Signals on NO, COM, EN, A0, A1, or A2 exceeding V+ or V- are clamped by internal diodes. Limit forward current to
maximum current ratings.
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—Dual Supplies
(V+ = +15V, V- = -15V, GND = 0V, V
AH
= +2.4V, V
AL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SWITCH
Analog Signal Range
On-Resistance
On-Resistance Matching
Between Channels
On-Resistance Flatness
NO-Off Leakage Current
(Note 5)
V
NO
,
V
COM
R
ON
∆R
ON
R
FLAT
(Note 3)
I
NO
= -1.0mA,
V
COM
= ±10V
I
NO
= -1.0mA,
V
COM
= ±10V (Note 4)
I
NO
= -1.0mA,
V
COM
= ±5V or 0V
V
COM
= +10V,
V
NO
= ±10V,
V
EN
= 0V
V
NO
= ±10V,
V
COM
= +10V, MAX308
V
EN
= 0V
I
COM(OFF)
V
NO
= +10V,
V
COM
= ±10V, MAX309
V
EN
= 0V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
COM-On Leakage Current
(Note 5)
V
COM
= ±10V, MAX308
V
NO
= ±10V,
sequence
each switch
MAX309
on
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
C, E
M
C, E
M
C, E
M
C, E
M
C, E
M
-0.5
-2.5
-5.0
-0.75
-10
-20
-0.75
-5
-10
-0.75
-10
-20
-0.75
-5
-10
0.02
0.02
0.02
0.02
0.01
1.8
1.5
-15
60
15
100
125
5
8
7
10
0.5
2.5
5.0
0.75
10
20
0.75
5
10
0.75
10
20
0.75
5
10
nA
nA
nA
V
Ω
Ω
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
(Note 2)
UNITS
I
NO(OFF)
COM-Off Leakage Current
(Note 5)
I
COM(ON)
2
_______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +15V, V- = -15V, GND = 0V, V
AH
= +2.4V, V
AL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
INPUT
Input Current with
Input Voltage High
Input Current with
Input Voltage Low
SUPPLY
Power-Supply Range
V
EN
= V
A
= 0V or 4.5V
Positive Supply Current
I+
V
EN
= 2.4V,
V
A(ALL)
= 0V or 2.4V
V
EN
= 2.4V,
V
A(ALL)
= 0V or 2.4V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
I
AH
I
AL
V
A
= 2.4V or 15V
V
EN
= 0V or 2.4V,
V
A
= 0V
-1.0
-1.0
1.0
1.0
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
(Note 2)
UNITS
MAX308/MAX309
±5
16
0.075
-1
-10
85
10
40
85
±20
30
75
0.5
1
10
175
250
150
225
150
300
10
V
µA
mA
µA
Negative Supply Current
DYNAMIC
Transistion Time
Break-Before-Make Interval
Enable Turn-On Time
Enable Turn-Off Time
Charge Injection
(Note 3)
Off Isolation
(Note 6)
I-
t
TRANS
t
OPEN
t
ON(EN)
t
OFF(EN)
Q
Figure 2
Figure 4
Figure 3
Figure 3
C
L
= 1.0nF,
V
NO
= 0V,
R
S
= 0Ω, Figure 5
V
EN
= 0V,
R
L
= 1kΩ,
f = 100kHz, Figure 6
V
EN
= 2.4V,
f = 100kHz,
V
GEN
= 1V
P-P
,
R
L
= 1kΩ, Figure 7
f = 1MHz
f = 1MHz,
V
EN
= V
NO
= 0V,
Figure 8
MAX308
ns
ns
ns
ns
pC
2
V
ISO
T
A
= +25°C
-75
dB
Crosstalk Between Channels
V
CT
C
IN
C
NO(OFF)
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
-92
dB
Logic Input Capacitance
NO-Off Capacitance
8
3
26
pF
pF
COM-Off Capacitance
COM-On Capacitance
f = 1MHz,
V
EN
= 0.8V
C
COM(OFF)
V
COM
= 0V,
Figure 8
f = 1MHz,
V
EN
= 2.4V
C
COM(ON)
V
COM
= 0V,
Figure 8
T
A
= +25°C
MAX309
MAX308
T
A
= +25°C
MAX309
25
14
37
pF
pF
_______________________________________________________________________________________
3
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
MAX308/MAX309
ELECTRICAL CHARACTERISTICS—Single Supply
(V+ = +12V, V- = 0V, GND = 0V, V
AH
= +2.4V, V
AL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SWITCH
Analog Signal Range
On-Resistance
DYNAMIC
Transition Time
(Note 3)
t
TRANS
V
NO1
= 8V,
V
NO8
= 0V,
V
IN
= 2.4V,
Figure 2
V
INH
= 2.4V,
V
INL
= 0V,
V
NO1
= 5V,
Figure 3
V
INH
= 2.4V,
V
INL
= 0V,
V
NO1
= 5V,
Figure 3
C
L
= 1.0nF,
V
NO
= 0V,
R
S
= 0Ω
T
A
= +25°C
115
450
ns
V
NO
,
V
COM
R
ON
(Note 3)
I
NO
= -1.0mA
V
COM
= 3V or 10V
T
A
= +25°C
0
120
12
175
V
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
(Note 2)
UNITS
Enable Turn-On Time
(Note 3)
t
ON(EN)
T
A
= +25°C
100
600
ns
Enable Turn-Off Time
(Note 3)
Charge Injection
(Note 3)
t
OFF(EN)
T
A
= +25°C
75
300
ns
Q
T
A
= +25°C
2
10
pC
Note 2:
The algebraic convention where the most negative value is a minimum and the most positive value a maximum is used in
this data sheet.
Note 3:
Guaranteed by design.
Note 4:
∆R
ON
= R
ON(MAX)
- R
ON(MIN).
On-resistance match between channels and flatness are guaranteed only with specified
voltages. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured at
the extremes of the specified analog signal range.
Note 5:
Leakage parameters are 100% tested at the maximum rated hot temperature and guaranteed by correlation at +25°C.
Note 6:
Off isolation = 20log V
COM
/V
NO
, where V
COM
= output and V
NO
= input to off switch.
4
_______________________________________________________________________________________
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
MAX308/MAX309
ON-RESISTANCE vs. V
COM
(DUAL SUPPLIES)
MAX308/9 TOC-01
ON-RESISTANCE vs. V
COM
AND
TEMPERATURE (DUAL SUPPLIES)
MAX308/9 TOC-02
ON-RESISTANCE vs. V
COM
(SINGLE SUPPLY)
360
320
280
R
ON
(Ω)
5V
240
200
160
120
10V
15V
20V
0
5
10
V
COM
(V)
15
20
MAX308/9 TOC-03
160
140
±5V
120
100
R
ON
(Ω)
80
60
40
±15V
±20V
20
0
-20
±10V
120
100
80
R
ON
(Ω)
60
40
20
0
400
V+ = +15V
V- = -15V
+125°C
+85°C
+25°C
-55°C
80
40
-15
-10
-5
0
V
COM
(V)
5
10
15
-15 -10
-5
0
5
10
15
20
V
COM
(V)
ON-RESISTANCE vs. V
COM
AND
TEMPERATURE (SINGLE SUPPLY)
MAX308/9 TOC-04
OFF LEAKAGE vs. TEMPERATURE
MAX308/9 TOC-05
ON LEAKAGE vs. TEMPERATURE
V+ = 15V
V- = -15V
MAX308/9 TOC-05
160
140
120
100
R
ON
(Ω)
80
60
40
20
0
0
V+ = 15V
V- = 0V
+125°C
+85°C
+25°C
-55°C
1000
100
OFF LEAKAGE (nA)
10
1
0.1
0.01
0.001
0.0001
I
COM (ON)
V+ = 15V
V- = -15V
1000
100
ON LEAKAGE (nA)
10
1
0.1
0.01
I
NO (OFF)
0.001
0.0001
-55 -35 -15
5
25 45
65
85 105 125
-55 -35 -15
5
I
COM (ON)
5
V
COM
(V)
10
15
25 45
65
85 105 125
TEMPERATURE (°C)
TEMPERATURE (°C)
CHARGE INJECTION vs. V
COM
MAX308/9 TOC-07
SUPPLY CURRENT vs. TEMPERATURE
I+
10
MAX4308/9-TOC8
30
20
10
Q
j
(pC)
0
-10
-20
-30
-15
-10
-5
0
V
COM
(V)
5
10
V+ = 12V
V- = 0V
V+ = +15V
V- = -15V
100
I+, I- (µA)
1
0.1
I-
0.01
V+ = +15V
V- = -15V
V
EN
= V
A
= 0V, 4.5V
-55 -35 -15
5
25 45
65
85 105 125
0.001
15
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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