Standard Products
MUX8521 16-Channel Analog Multiplexer Module
Radiation Tolerant & ESD Protected
Kelvin Measurement Configured
www.aeroflex.com/mux
May 17, 2011
FEATURES
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16 Kelvin measurement channels provided by two 16-channel multiplexers
Radiation performance
- Total dose:
300 krads(Si), Dose rate = 50 - 300 rads(Si)/s
- SEU:
Immune up to 120 MeV-cm
2
/mg
- SEL:
Immune by process design
Full military temperature range
Low power consumption < 30mW
One address bus A
0
~A
3
, and one enable line
All channel inputs protected by ±20V nominal Transorbs
Fast access time 1500ns typical
Break-Before-Make switching
High analog input impedance (power on or off )
Designed for aerospace and high reliability space applications
Packaging – Hermetic ceramic
- 56 leads, 0.80"Sq x 0.20"Ht quad flat pack
- Typical Weight 6 grams
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GENERAL DESCRIPTION
Aeroflex’s MUX8521 is a radiation tolerant, 16 channel multiplexer MCM (Multi Chip Module) with
electrostatic discharge (ESD) protection on all channel inputs.
The MUX8521 has been specifically designed to meet exposure to radiation environments. It is available
in a 56 lead High Temperature Co-Fired Ceramic (HTCC) Quad Flatpack (CQFP). It is guaranteed
operational from -55°C to +125°C. Available screened in accordance with MIL-PRF-38534, the
MUX8521 is ideal for demanding military and space applications.
ORGANIZATION AND APPLICATION
The MUX8521 consists of two 16 channel multiplexers arranged as shown in the block diagram,
addressable by bus A
0
~A
3
including enable which connects the addressed channel to two separate outputs,
"Output" and "Current". This technique enables selecting and reading a remote resistive sensor without the
MUX resistance being part of the measurement. For grounded sensors, this is done by passing current to
the sensor by means of the "Current" pin and reading the resultant voltage (proportional to the sensor
resistance) at the "Output" pin.
SCD8521 Rev B
CH 0
16
16
CH 15
•
•
•
VR
MUX 1
OUTPUT (0-15)
EN (0-15)
+V
EE
-V
EE
16
MUX 2
V
REF
GND
CURRENT (0-15)
A0
A1
A2
A3
MUX8521: 16 KELVIN MEASUREMENT CHANNEL ANALOG MUX BLOCK DIAGRAM
SCD8521 Rev B 5/17/11
2
Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS
1/
Parameter
Case Operating Temperature Range
Storage Temperature Range
Supply Voltage
+V
EE
(Pin 18)
-V
EE
(Pin 46)
V
REF
(Pin 39)
Digital Input Overvoltage
V
EN
(Pin 13), V
A
(Pins 14, 15, 16, 17)
Analog Input Over Voltage
V
IN
Notes:
1/ All measurements are made with respect to ground.
NOTICE: Stresses above those listed under "Absolute Maximums Rating" may cause permanent damage to the device. These are stress rating
only; functional operation beyond the "Operation Conditions" is not recommended and extended exposure beyond the "Operation Conditions" may
affect device reliability.
Range
-55 to +125
-65 to +150
+16.5
-16.5
+16.5
< V
REF
+4
> GND -4
±18V
Units
°C
°C
V
V
V
V
V
V
RECOMMENDED OPERATING CONDITIONS
1/
Symbol
+V
EE
-V
EE
V
REF
V
AL
V
AH
+15V Power Supply Voltage
-15V Power Supply Voltage
Reference Voltage
Logic Low Level
Logic High Level
Parameter
Typical
+15.0
-15.0
+5.00
+0.8
+4.0
Units
V
V
V
V
V
1/ Power Supply turn-on sequence shall be as follows: +V
EE
, -V
EE
, followed by V
REF
.
DC ELECTRICAL PERFORMANCE CHARACTERISTICS
1/
(T
C
= -55°C
TO
+125°C, +V
EE
= +15V, -V
EE
= -15V, V
REF
= +5.0V -- U
NLESS OTHERWISE SPECIFIED
)
Parameter
Symbol
+I
EE
-I
EE
Supply Current
+I
SBY
-I
SBY
I
AL
(0-3)
A
Address Input Current
I
AH
(0-3)
A
I
ENL
(0-15)
Enable Input Current
I
ENH
(0-15)
SCD8521 Rev B 5/17/11
Conditions
V
EN
(0-15) = V
A
(0-3) = 0
V
EN
(0-15) = V
A
(0-3) = 0
V
EN
(0-15) = 4V, V
A
(0-3) = 0 6/
V
EN
(0-15) = 4V, V
A
(0-3) = 0 6/
V
A
= 0V
V
A
= 5V
V
EN
(0-15) = 0V
V
EN
(0-15) = 5V
Min
Max
Units
mA
mA
mA
mA
A
A
A
A
0.1
-1
0.1
-1
-2
-2
-2
-2
1
-0.1
1
-0.1
2
2
2
2
Aeroflex Plainview
3
DC ELECTRICAL PERFORMANCE CHARACTERISTICS
1/
(continued)
(T
C
= -55°C
TO
+125°C, +V
EE
= +15V, -V
EE
= -15V, V
REF
= +5.0V -- U
NLESS OTHERWISE SPECIFIED
)
Parameter
Positive Input
Leakage Current
(CH0-CH15)
Negative Input
Leakage Current
(CH0-CH15)
Positive Output
Leakage Current
OUTPUTS (pins 12,45)
Negative Output
Leakage Current
OUTPUTS (pins 12,45)
Input Clamped Voltage
(CH0-CH15)
Input Clamped Voltage
(CH0-CH15)
Symbol
+I
SOFFOUTPUT
(
ALL
)
Conditions
V
IN
= +10V, V
EN
= 4V, output and all unused MUX inputs
under test = -10V 2/, 3/
V
IN
= -10V, V
EN
= 4V, output and all unused MUX inputs
under test = +10V 2/, 3/
V
OUT
= +10V, V
EN
= 4V, output and all unused MUX
inputs under test = -10V 3/, 4/
V
OUT
= -10V, V
EN
= 4V, output and all unused MUX inputs
under test = +10V 3/, 4/
+25°C
+125°C
-55°C
+25°C
+125°C
-55°C
Min
-100
Max
+700
Units
nA
-I
SOFFOUTPUT
(
ALL
)
-100
+700
nA
+I
DOFFOUTPUT
(
ALL
)
-100
+100
nA
-I
DOFFOUTPUT
(
ALL
)
-100
18.0
18.0
17.5
-23.0
-23.5
-22.5
500
500
500
+100
23.0
23.5
22.5
-18.0
-18.0
-17.5
3000
3000
3000
nA
V
V
V
V
V
V
+V
CLMP
V
EN
= 4V, all unused MUX inputs under test
are open. 3/
-V
CLMP
R
DS
(
ON
)(0-15)
A
V
IN
= +15V, V
EN
= 0.8V, I
OUT
= -1mA 2/, 3/, 5/
V
IN
= +5V, V
EN
= 0.8V, I
OUT
= -1mA 2/, 3/, 5/
V
IN
= -5V, V
EN
= 0.8V, I
OUT
= +1mA 2/, 3/, 5/
Switch ON Resistance
OUTPUTS (pins 12,45)
R
DS
(
ON
)(0-15)
B
R
DS
(
ON
)(0-15)
C
Notes:
1/ Measure inputs sequentially. Ground all unused inputs of the device under test. V
A
is the applied input voltage to the address lines A(0-3).
2/ V
IN
is the applied input voltage to the input channels (CH0-CH15).
3/ V
EN
is the applied input voltage to the enable line EN (0-15).
4/ V
OUT
is the applied input voltage to the output lines OUTPUT (0-15), CURRENT (0-15)
5/ Negative current is the current flowing out of each of the MUX pins. Positive current is the current flowing into each MUX pin.
6/ Not tested, guaranteed to the specified limits.
SWITCHING CHARACTERISTICS
(T
C
= -55°C
TO
+125°C, +V
EE
= +15V, -V
EE
= -15V, V
REF
= +5.0V -- U
NLESS OTHERWISE SPECIFIED
)
Parameter
Symbol
tAHL
tALH
t
ON
EN
t
OFF
EN
Conditions
R
L
= 10K
C
L
= 50pF
R
L
= 10K
C
L
= 50pF
Tc = +25°C, +125°C
Tc = -55°C
R
L
= 1K
C
L
= 50pF
Min
10
10
10
10
10
Max
1500
2000
5000
1500
1000
Units
ns
ns
ns
ns
ns
Switching Test MUX
SCD8521 Rev B 5/17/11
4
Aeroflex Plainview
TRUTH TABLE (CH0 – CH15)
A3
X
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
A2
X
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
A1
X
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
A0
X
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
EN (0-15)
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
"ON" CHANNEL 1/
NONE
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15
1/ Between (CH0-CH15) and OUTPUT (0-15), CURRENT (0-15)
SCD8521 Rev B 5/17/11
5
Aeroflex Plainview
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