358
8-Channel Fault-Protected
Analog Multiplexer
Memory
Logic Diagram
F
EATURES
:
• R
AD
-P
AK
® technology-hardened against natural space radi-
ation
• Total dose hardness:
- > 50 krad (Si), depending upon space mission
• Excellent Single Event Effect
- SEL
TH
> 80 MeV/mg/cm
2
•
•
•
•
•
•
•
- SEU
TH
> 80 MeV/mg/cm
2
Package:
- 16 pin R
AD
-P
AK
® Flat Pack
All switches off with power supplies off
On channel turns OFF if overvoltage occurs
Only nanoamperes of input current under all fault condi-
tions
Operates from ±4.5 to ±18V supplies
All digital inputs are TTL and CMOS compatible
Significantly reduced power consumption
D
ESCRIPTION
:
Maxwells’s 358 8-Channel single-ended (1 of 8) multiplexers
with fault protection features a greater than 50 krad (Si) total
dose tolerance, depending upon space mission. Using a
series N-channel, P-channel, N-channel structure, these multi-
plexers provide significantly improved fault protection. If the
power supplies to the fault-protected multiplexer are inadvert-
ently turned off while input voltages are still applied, all chan-
nels in the multiplexer are turned off, and only a few
nanoamperes of leakage current will flow into the inputs. This
protects not only the multiplexer and the circuitry driven by the
multiplexer, but also protects the sensors or signal sources
which drive the multiplexer. All digital inputs have logic thresh-
olds of 0.8V and 2.4V, ensuring both TTL and CMOS compati-
bility without requiring pullup resistors. Break-before-make
operation is guaranteed. Power supply currents have been
reduced and typical power dissipation is less than 2 mW.
Maxwell Technologies' patented R
AD
-P
AK
® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or a space
mission. In a GEO orbit, Rad-Pak® provides true greater than
50 krad (Si) total radiation dose tolerance, dependent upon
space mission. This product is available with packaging and
screening up to Class S.
02.06.04 Rev 3
All data sheets are subject to change without notice
1
(858) 503-3000 - Fax: (858) 503-3301 - www.maxwell.com
©2004 Maxwell Technologies
All rights reserved.
8-Channel Fault-Protected Analog Multiplexer
T
ABLE
1. P
INOUT
D
ESCRIPTION
P
IN
1, 16, 15
2
3
4-7, 12-9
8
13
14
S
YMBOL
A0-A2
Enable
-V Supply
IN1-IN8
OUT
+V Supply
GND
D
ESCRIPTION
Address Inputs
Enable Inputs
Negative Supply Voltage
Analog Inputs-bidirectional
Output-bidirectional
Positive Supply Voltage
Ground
358
T
ABLE
2. 358 A
BSOLUTE
M
AXIMUM
R
ATINGS
P
ARAMETER
Voltage between Supply Pins
V+
V-
Digital Input Overvoltage
VEN, VA Vsupply (+)
Vsupply (-)
Analog Input Overvoltage with Multiplexer
Power On:
VS Vsupply (+)
Vsupply (-)
Analog Input Overvoltage with Multiplexer
Power Off:
VS Vsupply (+)
Vsupply (-)
Continuous Current
Peak Current
(Pulse at 1 ms, 10% duty cycle max)
Thermal Impedance
Weight
Operating Temperature Range:
Storage Temperature Range:
T
A
T
S
S
YMBOL
M
AX
+44
+22
-22
+4
-4
U
NITS
V
Memory
V
+20
-20
V
+35
-35
20
40
V
mA
Θ
JC
2.69
2.25
-55 to +125
-65 to +150
°C/W
Grams
°C
°C
02.06.04 Rev 3
All data sheets are subject to change without notice
2
©2004 Maxwell Technologies
All rights reserved.
8-Channel Fault-Protected Analog Multiplexer
T
ABLE
3. 358 E
LECTRICAL
C
HARACTERISTICS
(V
+
= 15V, V
-
= -15V, V
AH
= 2.4V, V
AL
= 0.8V, T
A
= -55
TO
+125°C,
UNLESS OTHERWISE SPECIFIED
)
P
ARAMETER
Channel Input
Capacitance
4
Channel Output
Capacitance
4
Digital Input
Capacitance
4
Digital Output
Capacitance
4
SUPPLY
Positive Supply Current
V
EN
= 0.8V or 2.4V
V
A
= 0V or 5V
1, 2, 3
1, 2, 3
1, 2, 3
I+
I-
V
OP
+25°C
Full
+25°C
Full
+25°C
±4.5
0.1
0.3
0.01
0.02
0.6
0.7
0.1
0.2
±18
T
EST
C
ONDITIONS
S
UBGROUPS
4, 5, 6
4, 5, 6
4, 5, 6
4, 5, 6
S
YMBOL
C
S(OFF)
C
D(OFF)
C
A
C
DS(OFF)
T
EMP
+25°C
+25°C
+25°C
+25°C
M
IN
T
YP
5
25
5
0.1
M
AX
358
U
NITS
pF
pF
pF
pF
mA
mA
V
Negative Supply Current V
EN
= 0.8V or 2.4V
V
A
= 0V or 5V
Power Supply Range for
Continuous Operation
5
Memory
1. The value shown is the steady state value. The transient leakage is typically 10 µ A.
2. When the analog signal exceeds +13.5V or -12V the blocking action of the gate structure goes into operation. Only leakage cur-
rents flow and the channel on resistance rises to infinity.
3. Digital input leakage is primarily due to the clamp diodes. Typical leakage is less than 1 nA @ +25°C.
4. Guaranteed by design.
5. Electrical characteristics, such as ON Resistance, will change when power supplies other than ±15V are used.
02.06.04 Rev 3
All data sheets are subject to change without notice
4
©2004 Maxwell Technologies
All rights reserved.
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