SCD8521 Rev B
FEATURES
❑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-cm2/mg
- SEL: Immune by process design
❑Full military temperature range
❑Low power consumption < 30mW
❑One address bus A0~A3, 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
MUX8521 16-Channel Analog Multiplexer Module
Radiation Tolerant & ESD Protected
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 A0~A3 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.
Standard Products
May 17, 2011
www.aeroflex.com/mux
Kelvin Measurement Configured
2
SCD8521 Rev B 5/17/11 Aeroflex Plainview
MUX8521: 16 KELVIN MEASUREMENT CHANNEL ANALOG MUX BLOCK DIAGRAM
CH 0
CH 15
•
•
•
EN (0-15)
CURRENT (0-15)
A0
A1
A2
A3
OUTPUT (0-15)
MUX 1
MUX 2
16
16
16
VR
+VEE
-VEE
VREF
GND
3
SCD8521 Rev B 5/17/11 Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS 1/
Parameter Range Units
Case Operating Temperature Range -55 to +125 °C
Storage Temperature Range -65 to +150 °C
Supply Voltage
+VEE (Pin 18)
-VEE (Pin 46)
VREF (Pin 39)
+16.5
-16.5
+16.5
V
V
V
Digital Input Overvoltage
VEN (Pin 13), VA (Pins 14, 15, 16, 17) < VREF +4
> GND -4 V
V
Analog Input Over Voltage
VIN ±18V V
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.
RECOMMENDED OPERATING CONDITIONS 1/
Symbol Parameter Typical Units
+VEE +15V Power Supply Voltage +15.0 V
-VEE -15V Power Supply Voltage -15.0 V
VREF Reference Voltage +5.00 V
VAL Logic Low Level +0.8 V
VAH Logic High Level +4.0 V
1/ Power Supply turn-on sequence shall be as follows: +VEE, -VEE, followed by VREF.
DC ELECTRICAL PERFORMANCE CHARACTERISTICS 1/
(TC = -55°C TO +125°C, +VEE = +15V, -VEE = -15V, VREF = +5.0V -- UNLESS OTHERWISE SPECIFIED)
Parameter Symbol Conditions Min Max Units
Supply Current
+IEE VEN(0-15) = VA(0-3) = 0 0.1 1 mA
-IEE VEN(0-15) = VA(0-3) = 0 -1 -0.1 mA
+ISBY VEN(0-15) = 4V, VA(0-3) = 0 6/0.1 1 mA
-ISBY VEN(0-15) = 4V, VA(0-3) = 0 6/-1 -0.1 mA
Address Input Current IAL(0-3)AVA = 0V -2 2 A
IAH(0-3)AVA = 5V -2 2 A
Enable Input Current IENL(0-15) VEN(0-15) = 0V -2 2 A
IENH(0-15) VEN(0-15) = 5V -2 2 A
4
SCD8521 Rev B 5/17/11 Aeroflex Plainview
Positive Input
Leakage Current
(CH0-CH15) +ISOFFOUTPUT(ALL)VIN = +10V, VEN = 4V, output and all unused MUX inputs
under test = -10V 2/, 3/-100 +700 nA
Negative Input
Leakage Current
(CH0-CH15) -ISOFFOUTPUT(ALL)VIN = -10V, VEN = 4V, output and all unused MUX inputs
under test = +10V 2/, 3/-100 +700 nA
Positive Output
Leakage Current
OUTPUTS (pins 12,45) +IDOFFOUTPUT(ALL)VOUT = +10V, VEN = 4V, output and all unused MUX
inputs under test = -10V 3/, 4/-100 +100 nA
Negative Output
Leakage Current
OUTPUTS (pins 12,45) -IDOFFOUTPUT(ALL)VOUT = -10V, V EN = 4V, output and all unused MUX inputs
under test = +10V 3/, 4/-100 +100 nA
Input Clamped Voltage
(CH0-CH15) +VCLMP VEN = 4V, all unused MUX inputs under test
are open. 3/
+25°C
+125°C
-55°C
18.0
18.0
17.5
23.0
23.5
22.5
V
V
V
Input Clamped Voltage
(CH0-CH15) -VCLMP +25°C
+125°C
-55°C
-23.0
-23.5
-22.5
-18.0
-18.0
-17.5
V
V
V
Switch ON Resistance
OUTPUTS (pins 12,45)
RDS(ON)(0-15)AVIN = +15V, VEN = 0.8V, IOUT = -1mA 2/, 3/, 5/ 500 3000
RDS(ON)(0-15)BVIN = +5V, VEN = 0.8V, IOUT = -1mA 2/, 3/, 5/ 500 3000
RDS(ON)(0-15)CVIN = -5V, VEN = 0.8V, IOUT = +1mA 2/, 3/, 5/ 500 3000
Notes:
1/ Measure inputs sequentially. Ground all unused inputs of the device under test. VA is the applied input voltage to the address lines A(0-3).
2/ VIN is the applied input voltage to the input channels (CH0-CH15).
3/ VEN is the applied input voltage to the enable line EN(0-15).
4/ VOUT 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
(TC = -55°C TO +125°C, +VEE = +15V, -VEE = -15V, VREF = +5.0V -- UNLESS OTHERWISE SPECIFIED)
Parameter Symbol Conditions Min Max Units
Switching Test MUX
tAHL RL = 10KCL = 50pF 10 1500 ns
tALH RL = 10KCL = 50pF
Tc = +25°C, +125°C
Tc = -55°C 10
10 2000
5000 ns
ns
tONEN RL = 1KCL = 50pF 10 1500 ns
tOFFEN 10 1000 ns
DC ELECTRICAL PERFORMANCE CHARACTERISTICS 1/ (continued)
(TC = -55°C TO +125°C, +VEE = +15V, -VEE = -15V, VREF = +5.0V -- UNLESS OTHERWISE SPECIFIED)
Parameter Symbol Conditions Min Max Units
5
SCD8521 Rev B 5/17/11 Aeroflex Plainview
TRUTH TABLE (CH0 – CH15)
A3 A2 A1 A0 EN(0-15) "ON" CHANNEL 1/
XXXX H NONE
LLLL L CH0
LLLH L CH1
L L H L L CH2
L L H H L CH3
L H L L L CH4
L H L H L CH5
L H H L L CH6
L H H H L CH7
HLLL L CH8
H L L H L CH9
H L H L L CH10
H L H H L CH11
H H L L L CH12
H H L H L CH13
H H H L L CH14
HHHH L CH15
1/ Between (CH0-CH15) and OUTPUT (0-15), CURRENT (0-15)
6
SCD8521 Rev B 5/17/11 Aeroflex Plainview
MUX8521 SWITCHING DIAGRAMS
4.0V
50%
~3V to 10.0V
50%
0V
t
OFF
ENt
ON
EN
Definition of t
ON
EN
and t
OFF
EN
0.8V
0V
0V
50%
50%
4.0V
0.8V
50%
11.6V MIN
11.6V MIN
4.0V
Address Lines
t
A
HL
50%
NOTE: f = 10KHz, Duty cycle = 50%.
(A0 - A3)
MUX Output
MUX Output
MUX Output
Address Lines
(A0 - A3)
EN
Lines
t
A
LH
Definition of t
A
HL
Definition of t
A
LH
0.8V
7
SCD8521 Rev B 5/17/11 Aeroflex Plainview
Notes:
1. It is recommended that all "NC" or "no connect pin", be grounded. This eliminates or minimizes any ESD or static buildup.
2. Package lid is internally connected to circuit ground (Pins 7, 8, 11, 21, 22, 35, 36, 49, 50).
PIN NUMBERS & FUNCTIONS
MUX8521 – 56 Leads Ceramic QUAD Flat Pack
Pin # Function Pin # Function
1 CH0 29 NC
2 CH1 30 NC
3 CH2 31 NC
4 CH3 32 NC
5 CH4 33 NC
6 CH5 34 NC
7GND 35GND
8GND 36GND
9 CH6 37 NC
10 CH7 38 NC
11 CASE GND 39 VREF
12 OUTPUT (0-15) 40 NC
13 EN (0-15) 41 NC
14 A0 42 NC
15 A1 43 NC
16 A2 44 NC
17 A3 45 CURRENT (0-15)
18 +VEE 46 -VEE
19 CH15 47 NC
20 CH14 48 NC
21 GND 49 GND
22 GND 50 GND
23 CH13 51 NC
24 CH12 52 NC
25 CH11 53 NC
26 CH10 54 NC
27 CH9 55 NC
28 CH8 56 NC
SCD8521 Rev B 5/17/11 8
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www.aeroflex.com info-ams@aeroflex.com
Aeroflex Microelectronic Solutions reserves the right to
change at any time without notice the specifications, design,
function, or form of its products described herein. All
parameters must be validated for each customer's application
by engineering. No liab ility is assumed as a result of use of
this product. No patent licenses are implied.
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EXPORT CONTROL: EXPOR T WARNING:
This product is controlled for export under the International Traffic in
Arms Regulations (ITAR). A license from the U.S. Department of
State is required prior to the export of this product from the United
States.
Aeroflex’s military and space products are controlled for export under
the International Traffic in Arms Regulations (ITAR) and may not be
sold or proposed or offered for sale to certain countries. (See ITAR
126.1 for complete information.)
PACKAGE OUTLINE
Note: Outside ceramic tie bars
not shown for clarity. Contact
factory for details.
ORDERING INFORMATION
Model DSCC SMD # Screening Package
MUX8521-7 -Commercial Flow, +25°C testing only
QUAD Flat
Pack
MUX8521-S -Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
MUX8521-201-1S 5962-0922902KXC In accordance with DSCC SMD
0.800 SQ
Pin 50
Pin 7
Pin 35
Pin 22
Pin 8
Pin 21
Pin 36
Pin 49
Pin 1
(13 Spaces at .050)
Tol Non-Cum
4 Sides
.0165
±.003
0.650 ±.005
.200
MAX
(.650)
.006
±.002
±.010