8-Channel Fault-Protected
Analog Multiplexer
358
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.
1000544
12.20.01 Rev 2
All data sheets are subject to change without notice
1
(858) 503-3000 - Fax: (858) 503-3301 - www.maxwell.com
©2001 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
Parameter
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
Operating Temperature Range:
Storage Temperature Range:
Symbol
Typ
+44
+22
-22
+4
-4
Units
V
Memory
V
+20
-20
V
+35
-35
20
40
V
mA
Θ
JC
T
A
T
S
2.69
-55 to +125
-65 to +150
°C/W
°C
°C
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
STATIC
ON Resistance
V
D
= ±10V, I
S
= ±100µA
V
AL
= 0.8V, V
AH
= 2.4V
r
DS(ON)
+25°C
Full
1.2
1.5
1.5
1.8
k
Ω
T
EST
C
ONDITIONS
S
YMBOL
T
EMP
M
IN
T
YP
M
AX
U
NITS
1000544
12.20.01 Rev 2
All data sheets are subject to change without notice
2
©2001 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
OFF Input Leakage Current
OFF Output Leakage Current
ON Channel Leakage Current
T
EST
C
ONDITIONS
V
S
= ±10V, V
D
= +10V
V
EN
= 0.8V
V
D
= ±10V, V
S
= +10V
V
EN
= 0.8V
V
S(ALL)
= V
D
= ±10V
1
V
AH
= V
EN
= 2.4V
V
AL
= 0.8V
2
358
M
IN
T
YP
0.03
50
0.1
200
0.1
200
2
-15
4.0
2.0
5.0
2.0
15
V
nA
µA
µA
nA
nA
M
AX
U
NITS
nA
S
YMBOL
I
S(OFF)
I
D(OFF)
I
D(ON)
T
EMP
+25°C
Full
+25°C
Full
+25°C
Full
Full
+25°C
Full
+25°C
+25°C
Analog Signal Range
FAULT
Output Leakage Current (with
Overvoltage)
V
AN
I
D(OFF)
I
S(OFF)
I
S(OFF)
V
D
= 0V
1
Analog Overvoltage = ±33V
Input Leakage Current (with Over- V
IN
= ±25V, V
O
= ±10V
1
voltage)
Input Leakage Current (w/ Power
Supplies Off)
INPUT
Input Low Threshold
Input High Threshold
Input Leakage Current (High or
Low)
DYNAMIC
Access Time
Break-Before-Make Delay
Enable Delay (ON)
Enable Delay (OFF)
Setting Time: (0.1%)
(0.01%)
“OFF Isolation”
4
V
EN
= 0.8V, R
L
= 1k
Ω
C
L
= 15pF, V = 7V
RMS
f = 100kHz
V
EN
= ±5V, V
IN
= ±10V
A
O
, A
1
, A
2
Strobed
V
A
= 4V or 0V
3
V
IN
= ±25V, V
EN
= V
O
= 0V
A
O
= A
1
= A
2
= OV or 5V
Memory
µA
V
AL
V
AH
I
A
Full
Full
Full
2.4
0.8
1.0
V
V
µA
t
A
t
on-
t
off
t
on(EN)
t
off(EN)
t
sett
+25°C
+25°C
+25°C
Full
+25°C
Full
+25°C
+25°C
50
25
0.5
80
300
300
1.2
3.5
68
1.0
µs
ns
500
1000
500
1000
ns
ns
µs
db
Channel Input Capacitance
Channel Output Capacitance
Digital Input Capacitance
Digital Output Capacitance
SUPPLY
1000544
C
S(OFF)
C
D(OFF)
C
A
C
DS(OFF)
+25°C
+25°C
+25°C
+25°C
5
25
5
0.1
pF
pF
pF
pF
12.20.01 Rev 2
All data sheets are subject to change without notice
3
©2001 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
Positive Supply Current
Negative Supply Current
Power Supply Range for Continu-
ous Operation
T
EST
C
ONDITIONS
V
EN
= 0.8V or 2.4V
V
A
= 0V or 5V
V
EN
= 0.8V or 2.4V
V
A
= 0V or 5V
5
358
M
IN
T
YP
0.1
0.3
0.01
0.02
±4.5
M
AX
0.6
0.7
0.1
0.2
±18
U
NITS
mA
mA
V
S
YMBOL
I+
I-
V
OP
T
EMP
+25°C
Full
+25°C
Full
+25°C
1. The value shown is the steady state value. The transient leakage is typically 10 µA.
2. When the analog signal exceeds +13.5V or -12V the blocking action of the gate structure goes into operation. Only leakage
currents 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.
Memory
F
IGURE
1. I
NPUT
L
EAKAGE VS
. I
NPUT
V
OLTAGE WITH
V+ = V- = 0V
1000544
12.20.01 Rev 2
All data sheets are subject to change without notice
4
©2001 Maxwell Technologies
All rights reserved.
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