Standard Products
Datasheet
RadHard-by-Design
RHD8542 48-Channel Analog Multiplexer
Kelvin Measurement Configured
www.aeroflex.com/RHDseries
May 11, 2015
FEATURES
48 Kelvin measurement channels provided by six 16-channel multiplexers
Single power supply operation at +3.3V to +5V
Radiation performance
- Total dose:
>1Mrad(Si), Dose rate = 50 - 300 rads(Si)/s
- ELDRS Immune
- SEL Immune:
>100 MeV-cm
2
/mg
- Neutron Displacement Damage:
>10
14
neutrons/cm
2
Full military temperature range
Low power consumption < 33.6 mW
CMOS analog switching allows rail to rail operation and low switch impedance
One address bus (A0-3) and three enable lines afford flexible organization
Designed for aerospace and high reliability space applications
Packaging – Hermetic ceramic
- 96 leads, 1.320"Sq x 0.200"Ht quad flat pack
- Weight - 15 grams max
Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
GENERAL DESCRIPTION
Aeroflex’s RHD8542 is a radiation hardened, single supply, 48-Channel Multiplexer MCM (multi-chip
module). The RHD8542 design uses specific circuit topology and layout methods to mitigate total
ionization dose effects and single event latchup. These characteristics make the RHD8542 especially suited
for the harsh environment encountered in Deep Space missions. It is available in a 96 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 Class K, the RHD8542 is ideal for
demanding military and space applications.
ORGANIZATION AND APPLICATION
The RHD8542 consists of forty-eight (48) Kelvin measurement channels addressable by bus A
0
~A
3
in three
16 channel blocks, each block enabled separately. Each block connects the addressed channel to two
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.
The device will not latch with SEU events to above 100MeV-cm
2
/mg. Total dose degradation is minimal to
above 1Mrad(Si). Displacement damage environments to neutron fluence equivalents in the mid 10
14
neutrons per cm
2
range are readily tolerated. There is no sensitivity to low-dose rate (ELDRS) effects. SEU
effects are application dependent.
SCD8542 Rev A
ABSOLUTE MAXIMUM RATINGS
1/
Parameter
Case Operating Temperature Range
Storage Temperature Range
Supply Voltage
+V
CC
(Pin 44)
Digital Input Overvoltage
V
EN
(Pins 5, 91, 92), V
A
(Pins 1, 3, 93, 95)
Analog Input Over Voltage
V
IN
(CH0-CH47)
Notes:
1/ All measurements are made with respect to ground.
NOTICE: Stresses above those listed under ’Absolute Maximum Ratings’ 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
+3.0 to +7.0
< V
CC
+0.4
> GND -0.4
< V
CC
+0.4
> GND -0.4
Units
°C
°C
V
V
V
V
RECOMMENDED OPERATING CONDITIONS 1/
Symbol
+V
CC
V
ENL
, V
AL
V
ENH
, V
AH
Power Supply Voltage
Logic Low Level
Logic High Level
Parameter
Typical
3.3 to 5.0
30% V
CC
70% V
CC
Units
V
V
V
DC ELECTRICAL PERFORMANCE CHARACTERISTICS
1/
(Tc = -55°C to +125°C, +V
CC
= +5V - Unless otherwise specified)
Parameter
Supply Current
+V
CC
Symbol
+I
CC
+I
SBY
I
AL
(0-3)
A
EN = 30% V
CC
EN = 70% V
CC
V
A
= 30% V
CC
Conditions
Min
0
0
+25°C
+125°C
+25°C
+125°C
+25°C
+125°C
-30
-300
-30
-300
-10
-100
-10
-100
Max
4.8
1.2
30
300
30
300
10
100
10
100
Units
mA
mA
nA
nA
nA
nA
nA
nA
nA
nA
Address Input Current
A(0-3)
I
AH
(0-3)
A
I
ENL
(0-15)
I
ENL
(16-31)
I
ENL
(32-47)
I
ENH
(0-15)
I
ENH
(16-31)
I
ENH
(32-47)
V
A
= 70% V
CC
V
EN
(0-15) = 30% V
CC
Enable Input Current
EN
V
EN
(0-15) = 70% V
CC
+25°C
+125°C
SCD8542 Rev A 5/11/15
3
Aeroflex Plainview
DC ELECTRICAL PERFORMANCE CHARACTERISTICS
1/
(continued)
(Tc = -55°C to +125°C, +V
CC
= +5V - Unless otherwise specified)
Parameter
High Input
Leakage Current
(CH0-CH47)
Low Input
Leakage Current
(CH0-CH47)
Output Leakage Current
V
OUT
(pins 25, 68 & 70)
CURRENTS
(pins 26, 67 & 69)
Switch ON Resistance
OUTPUTS
(pins 25, 68 & 70)
CURRENTS
(pins 26, 67 & 69)
Symbol
I
INLK5
I
INLK0
Conditions
V
IN
= +5V, V
EN
=70% V
CC
,
Output and all unused MUX inputs under test = 0V
V
IN
= 0V, V
EN
=70% V
CC
,
Output and all unused MUX inputs under test =
+5V
V
OUT
= +5V, V
EN
= 70% V
CC
,
All inputs grounded except channel being tested.
3/, 4/
V
IN
= 0V, V
IN
= +2.5V, V
IN
= +5V
V
EN
= 30% V
CC
I
OUT
= -1mA
2/, 3/, 5/, 6/
+25°C
+125°C
+25°C
+125°C
+25°C
+125°C
-55°C
+25°C
+125°C
Min
-10
-100
-10
-100
-5
-50
-
-
-
Max
10
100
10
100
5
50
500
750
1000
Units
nA
nA
nA
nA
nA
nA
I
OUTLK
R
DS
(
ON
)
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-CH47).
3/ V
EN
is the applied input voltage to the enable lines EN (0-15), EN (16-31) and EN (32-47).
4/ V
OUT
is the applied input voltage to the output lines OUTPUT(0-15), OUTPUT(16-31) and OUTPUT(32-47), CURRENT(16-31) and
CURRENT(32-47).
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/ The RHD8542 cannot be operated with analog inputs below 0 volts.
(Tc = -55°C to +125°C, +V
CC
= +5V - Unless otherwise specified)
Parameter
SWITCHING CHARACTERISTICS
Conditions
V
OUT
High to Low Transition
Symbol
t
A
HL
Temp
-55°C
+25°C
+125°C
-55°C
Min
10
10
10
10
10
10
10
10
10
10
Max
150
150
200
150
150
200
150
150
200
200
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Address to Output Delay
t
A
LH
V
OUT
Low to High Transition
+25°C
+125°C
-55°C
Enable to Output Delay
t
ON
EN
t
OFF
EN
V
EN
= 30% V
CC
(Enabled)
+25°C
+125°C
V
EN
= 70% V
CC
(Disabled)
ALL
SCD8542 Rev A 5/11/15
4
Aeroflex Plainview
Microchip MCU
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