_______________General Description
The MAX308/MAX309 precision, monolithic, CMOS ana-
log multiplexers (muxes) offer low on-resistance (less
than 100
), which is matched to within 5
between
channels and remains flat over the specified analog sig-
nal range (7
max). They also offer low leakage over
temperature (NO-off leakage current less than 5nA at
+85C) 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 +4.5V to +30V sup-
ply or bipolar 4.5V 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.
________________________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
____________________________Features
o
Guaranteed On-Resistance Match Between
Channels, <5
Max
o
Low On-Resistance, <100
Max
o
Guaranteed Flat On-Resistance over Specified
Signal Range, 7
Max
o
Guarateed Low Charge Injection, <10pC
o
NO-Off Leakage Current <5nA at +85C
o
COM-Off Leakage Current <20nA at +85C
o
ESD Protection >2000V
o
Plug-In Upgrade for Industry-Standard
DG408/DG409/DG508A/DG509A
o
Single-Supply Operation (+4.5V to +30V)
Bipolar-Supply Operation (4.5V to 20V)
o
Low Power Consumption, <300W
o
Rail-to-Rail Signal Handling
o
TTL/CMOS-Logic Compatible
______________Ordering Information
MAX308/MAX309
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
________________________________________________________________
Maxim Integrated Products
1
CMOS DECODE LOGIC
A2
A1
A0
EN
NO8
NO7
NO6
NO5
NO4
NO3
NO2
NO1
COM
V+
V-
GND
MAX308 8-CHANNEL SINGLE-ENDED MULTIPLEXER
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
A2
GND
V+
NO1
V-
EN
A0
TOP VIEW
MAX308
NO5
NO6
NO7
NO8
COM
NO4
NO3
NO2
DIP/SO
Continued at end of data sheet.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
Call toll free 1-800-998-8800 for free samples or literature.
19-0271; Rev 0; 7/94
PART
MAX308
CPE
MAX308CSE
MAX308C/D
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
** Contact factory for availability.
MAX308EPE
-40C to +85C
16 Plastic DIP
MAX308ESE
-40C to +85C
16 Narrow SO
MAX308EJE
-40C to +85C
16 CERDIP
MAX308MJE
-55C to +125C
16 CERDIP**
MAX308/MAX309
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.)
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.
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
= +70C)
Plastic DIP (derate 10.53mW/C above +70C) ..........842mW
Narrow SO (derate 8.70mW/C above +70C) ............696mW
CERDIP (derate 10.00mW/C above +70C) ...............800mW
Operating Temperature Ranges
MAX30_C_ _ .......................................................0C to +70C
MAX30_E_ _.....................................................-40C to +85C
MAX30_MJE ..................................................-55C to +125C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
V
COM
= 10V,
V
NO
= 10V,
sequence
each switch
on
V
NO
= +10V,
V
COM
= 10V,
V
EN
= 0V
V
COM
= +10V,
V
NO
= 10V,
V
EN
= 0V
I
NO
= -1.0mA,
V
COM
= 10V
I
NO
= -1.0mA,
V
COM
= 10V (Note 4)
V
NO
= 10V,
V
COM
= +10V,
V
EN
= 0V
CONDITIONS
nA
-10
10
I
COM(ON)
COM-On Leakage Current
(Note 5)
-5
5
-0.75
0.02
0.75
-20
20
-10
10
-0.75
0.02
0.75
nA
-10
10
I
COM(OFF)
COM-Off Leakage Current
(Note 5)
-5
5
-0.75
0.02
0.75
-20
20
60
100
-10
10
-0.75
0.02
0.75
nA
-5.0
5.0
I
NO(OFF)
NO-Off Leakage Current
(Note 5)
-2.5
2.5
125
R
ON
On-Resistance
1.5
5
8
R
ON
On-Resistance Matching
Between Channels
UNITS
MIN
TYP
MAX
(Note 2)
SYMBOL
PARAMETER
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.
V
-15
15
V
NO
,
V
COM
Analog Signal Range
I
NO
= -1.0mA,
V
COM
= 5V or 0V
1.8
7
10
R
FLAT
On-Resistance Flatness
(Note 3)
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
-0.5
0.01
0.5
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
MAX309
MAX308
MAX309
MAX308
C, E
M
C, E
M
C, E
M
C, E
M
C, E
M
SWITCH
MAX308/MAX309
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
_______________________________________________________________________________________
3
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.)
Off Isolation
(Note 6)
dB
-75
V
ISO
2
10
Q
Charge Injection
(Note 3)
ns
300
150
t
OFF(EN)
Enable Turn-Off Time
ns
225
t
ON(EN)
Enable Turn-On Time
85
150
ns
10
40
t
OPEN
Break-Before-Make Interval
85
175
A
-1.0
1.0
I
AL
Input Current with
Input Voltage Low
A
-1.0
1.0
I
AH
Input Current with
Input Voltage High
A
-10
10
I-
Negative Supply Current
-1
1
mA
I+
Positive Supply Current
0.075
0.5
V
4.5
20
Power-Supply Range
16
30
A
75
UNITS
MIN
TYP
MAX
(Note 2)
SYMBOL
PARAMETER
Crosstalk Between Channels
V
CT
-92
dB
Logic Input Capacitance
C
IN
8
pF
NO-Off Capacitance
C
NO(OFF)
3
pF
26
COM-Off Capacitance
C
COM(OFF)
f = 1MHz,
V
EN
= 0.8V
V
COM
= 0V,
Figure 8
14
pF
37
COM-On Capacitance
C
COM(ON)
f = 1MHz,
V
EN
= 2.4V
V
COM
= 0V,
Figure 8
25
pF
T
A
= +25C
V
EN
= 0V or 2.4V,
V
A
= 0V
T
A
= +25C
V
A
= 2.4V or 15V
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= +25C
T
A
= +25C
T
A
= T
MIN
to T
MAX
T
A
= +25C
T
A
= +25C
T
A
= +25C
T
A
= T
MIN
to T
MAX
CONDITIONS
T
A
= +25C
T
A
= +25C
T
A
= +25C
T
A
= +25C
T
A
= +25C
V
EN
= 0V,
R
L
= 1k
,
f = 100kHz, Figure 6
C
L
= 1.0nF,
V
NO
= 0V,
R
S
= 0
, Figure 5
Figure 3
Figure 3
V
EN
= 2.4V,
V
A(ALL)
= 0V or 2.4V
Figure 4
V
EN
= 2.4V,
V
A(ALL)
= 0V or 2.4V
V
EN
= V
A
= 0V or 4.5V
V
EN
= 2.4V,
f = 100kHz,
V
GEN
= 1V
P-P
,
R
L
= 1k
, Figure 7
f = 1MHz
f = 1MHz,
V
EN
= V
NO
= 0V,
Figure 8
MAX308
MAX309
MAX308
MAX309
ns
250
t
TRANS
Transistion Time
T
A
= T
MIN
to T
MAX
Figure 2
INPUT
SUPPLY
DYNAMIC
pC
MAX308/MAX309
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
4
_______________________________________________________________________________________
(Note 3)
CONDITIONS
C
L
= 1.0nF,
V
NO
= 0V,
R
S
= 0
V
INH
= 2.4V,
V
INL
= 0V,
V
NO1
= 5V,
Figure 3
V
INH
= 2.4V,
V
INL
= 0V,
V
NO1
= 5V,
Figure 3
V
NO1
= 8V,
V
NO8
= 0V,
V
IN
= 2.4V,
Figure 2
I
NO
= -1.0mA
V
COM
= 3V or 10V
pC
2
10
Q
Charge Injection
(Note 3)
ns
75
300
t
OFF(EN)
Enable Turn-Off Time
(Note 3)
V
0
12
V
NO
,
V
COM
Analog Signal Range
ns
100
600
t
ON(EN)
Enable Turn-On Time
(Note 3)
ns
115
450
t
TRANS
Transition Time
(Note 3)
120
175
R
ON
On-Resistance
UNITS
MIN
TYP
MAX
(Note 2)
SYMBOL
PARAMETER
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.)
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 +25C.
Note 6:
Off isolation = 20log V
COM
/V
NO
, where V
COM
= output and V
NO
= input to off switch.
T
A
= +25C
T
A
= +25C
T
A
= +25C
T
A
= +25C
T
A
= +25C
SWITCH
DYNAMIC
MAX308/MAX309
Precision, 8-Channel/Dual 4-Channel,
High-Performance, CMOS Analog Multiplexers
_______________________________________________________________________________________
5
120
140
160
ON-RESISTANCE vs. V
COM
(DUAL SUPPLIES)
100
MAX308/9 TOC-01
0
20
40
60
-20
20
-15
15
-10
10
-5
5
0
80
V
COM
(V)
5V
10V
15V
20V
R
ON
(
)
120
ON-RESISTANCE vs. V
COM
AND
TEMPERATURE (DUAL SUPPLIES)
100
MAX308/9 TOC-02
0
20
40
60
-15
15
-10
10
-5
5
0
80
V
COM
(V)
+125C
+85C
+25C
-55C
R
ON
(
)
V+ = +15V
V- = -15V
280
320
360
400
ON-RESISTANCE vs. V
COM
(SINGLE SUPPLY)
240
MAX308/9 TOC-03
40
80
120
160
15
20
10
5
0
200
V
COM
(V)
R
ON
(
)
5V
10V
15V
20V
120
140
160
ON-RESISTANCE vs. V
COM
AND
TEMPERATURE (SINGLE SUPPLY)
100
MAX308/9 TOC-04
0
20
40
60
15
10
5
0
80
V
COM
(V)
R
ON
(
)
+125C
+85C
+25C
-55C
V+ = 15V
V- = 0V
30
CHARGE INJECTION vs. V
COM
20
MAX308/9 TOC-07
-30
-20
-10
0
-15
15
-10
10
-5
5
0
10
V
COM
(V)
Q
j
(pC)
V+ = 12V
V- = 0V
V+ = +15V
V- = -15V
10
0.0001
-55
125
OFF LEAKAGE vs. TEMPERATURE
1
MAX308/9 TOC-05
TEMPERATURE (
C)
OFF LEAKAGE (nA)
25
0.01
0.001
-35 -15
65
0.1
100
1000
45
85 105
5
I
NO (OFF)
I
COM (ON)
V+ = 15V
V- = -15V
10
0.0001
-55
125
ON LEAKAGE vs. TEMPERATURE
1
MAX308/9 TOC-05
TEMPERATURE (
C)
ON LEAKAGE (nA)
25
0.01
0.001
-35 -15
65
0.1
100
1000
45
85 105
5
I
COM (ON)
V+ = 15V
V- = -15V
100
0.001
-55
125
SUPPLY CURRENT vs. TEMPERATURE
10
MAX308/9 TOC-08
TEMPERATURE (
C)
I+, I- (
A)
25
0.1
0.01
-35 -15
65
1
45
85 105
5
I+
I-
V+ = +15V
V- = -15V
V
EN
= V
A
= 0V, 4.5V
__________________________________________Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
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