P
RELIMINARY
S
PACE
E
LECTRONICS
I
NC
.
S
PACE
P
RODUCTS
128 C
HANNEL
M
ULTIPLEXER
MCM
18280RE
Address
Enable
Clamp/
Precharge
Address
Enable
Bypass
Cascade Address
Enable V+
Inputs
V-
8:1
128 Channel
Analog Inputs
Positive
Output
16:1
8:1
8:1
Ground
Reference
Input
Spare
Inputs
8:1
SEi
18280RE
8:1
8:1
Negative
Output
Spare
Output
Memory
Address
Enable
Spare
Output
Address
Enable
Spare
Input
Address
Enable
BLOCK DIAGRAM
FIGURE 1
F
EATURES
:
128 channel multiplexer, MCM
Overvoltage and fault protected
No single event latch-up
High “OFF” isolation (68dB typical @ 100 khz)
Replaces 8 industry standard 1840, 16:1 analog multiplexers
Total dose hardness: typical 100 Krad (Si); dependent upon
orbit
• Package: 256 pin R
AD
-P
AK
® quad flat pack
• Multiple MCMs can be cascaded together
•
•
•
•
•
•
D
ESCRIPTION
:
Space Electronics’ 18280RE is a radiation-hardened, 128 channel, analog
MCM multiplexer which connects a single output to one of the 128 input
channels depending on the state of a 7 bit binary address. This device
offers low constant “ON” resistance and does not suffer from latch-up, or
static discharge blow-out. The digital inputs are designed to operate from
both TTL and CMOS levels, without the need for pull-up resistors. This
device is fault protected and provides high isolation during power out
(typically 68 dB @ 100khz).
The 18280RE high-performance 128-channel multiplexer features a typi-
cal 100 krad (Si) total dose tolerance; dependent upon orbit. The 18280RE
is intended for use in the environments encountered by high reliability
spacecraft applications. The patented radiation-hardened
R
AD
-P
AK
®
technology incorporates radiation shielding in the microcircuit package.
Capable of surviving in-space environment, the 18280RE is ideal for satel-
lite, spacecraft, and space probe missions. It is available with packaging
and screening up to Class K.
0714.99Rev0
1
©1999 Space Electronics Inc.
All rights reserved.
(619) 452-4167 - Fax: (619) 452-5499 - www.spaceelectronics.com
P
RELIMINARY
18280RE
128 C
HANNEL
M
ULTIPLEXER
MCM
T
ABLE
1. 18280RE M
UX
M
AXIMUM
R
ATINGS
P
ARAMETER
V+ to Ground
V- to Ground
Power Supply Range
Input Overvoltage, AIN(1) to AIN (128)
Input Overvoltage, Logic Inputs
External Current Source
Storage Temperature
Operating Temperature
Power Dissipation
R
ATING
+20 Volts
-20 Volts
+ 5.2 to + 20.0 Volts
+25 over V+ and -25 under V- (Power ON/OFF)
4V over V+ and -4V below V-
5mA
-65
o
C to 150
o
C
-55
o
C to 125
o
C
500mA
T
ABLE
2. 18280RE E
LECTRICAL
C
HARACTERISTICS
T
EST
S
YMBOL
Analog Overvoltage
Analog Signal Range
R
ON
@ VDS = ± 10 V
R
ON
@ VDS = ± 10 V
R
ON
@ VDS = ± 5 V
R
ON
Match
Leakage
I
S(OFF)
@ VDS =
± 10 V
I
S(OFF)
@ VDS =
± 10 V
I
D(OFF)
@ VDS =
± 10 V
I
D(OFF)
@ VDS =
± 10 V
I
D(ON)
@ VDS =
± 10 V
I
D(ON)
@ VDS =
± 10 V
C
ONDITIONS
T
EMPERATURE1
Tmin to Tmax
Tmin to Tmax
25
o
C
Tmin to Tmax
Tmin to Tmax
25 ºC
25 ºC
Tmin to Tmax
P
ARAMETERS
±35V
-12V to +15V
1900 W
2
2300 W
2
1750 W
2
3
Memory
50 nA
100 nA
25 ºC
Tmin to Tmax
50 nA
100 nA
25 ºC
Tmin to Tmax
50 nA
100 nA
0714.99Rev0
2
©1999 Space Electronics Inc.
All rights reserved.
P
RELIMINARY
18280RE
T
EST
S
YMBOL
Leakage: with
Overvoltage Prot.
(128 total analog inputs only)
128 C
HANNEL
M
ULTIPLEXER
MCM
T
ABLE
2. 18280RE E
LECTRICAL
C
HARACTERISTICS
C
ONDITIONS
Output
Input
Input (Supplies
off)
Ton
Ton
Toff
Toff
Input Capacitor,
Cs(Off)
Output Capaci-
tor Cd(Off)
Charge Inj.
T
EMPERATURE1
Tmin to Tmax
25 ºC
Tmin to Tmax
25 ºC
Tmin to Tmax
25 ºC
Tmin to Tmax
Tmin to Tmax
Tmin to Tmax
25 ºC
25 ºC
Tmin to Tmax
25 ºC
Tmin to Tmax
P
ARAMETERS
± 2 uA @ 33V
± 5 uA @ 25V
± 2 uA @ 25V
750 ns
1350 ns
125 ns
1300 ns
5 pF
25 pF
180 pC
0.1 %
3
0.1 %
3
Settling time:
Memory
0.01 %
3
0.01 %
3
18.6 mA
19.2 mA
-1.9 mA
-1.9 mA
Supply Current:
VDD = 15 V,
VSS = -15 V
Idd, Vin = 0/5 V
Idd, Vin = 0/5 V
Iss, Vin = 0/5 V
Iss, Vin = 0/5 V
25 ºC
Tmin to Tmax
25 ºC
Tmin to Tmax
1. Tmin to Tmax.
2. R
ON
measured at 100uA.
3. Guaranteed by design.
T
ABLE
3. 18280RE E
LECTRICAL
C
HARACTERISTICS
S
UPPLIES
= +15V, -15V; V
AH
(L
OGIC
L
EVEL
H
IGH
) = +2.4V, V
AL
(L
OGIC
L
EVEL
L
OW
) = +0.8V (
UNLESS OTHERWISE NOTED
)
P
ARAMETER
S
YMBOL
C
ONDITIONS
T
EMP
M
IN
Dynamic
“OFF Isolation”
OFF
(ISO)
V
EN
= 0.8V, R
L
= 1kΩ,
C
L
= 15pF, V = 7V
RMS
,
f = 100kHz
+25
o
C
50
68
--
dB
-55
o
C
TO
+125
o
C
T
YP
M
AX
U
NIT
Channel Input Capacitance
Channel Output Capacitance
Digital Input Capacitance
Input to Output Capacitance
Supply
C
S(OFF)
C
D(OFF)
C
A
C
DS(OFF)
+25
o
C
+25
o
C
+25
o
C
+25
o
C
--
--
--
--
5
25
5
0.1
--
--
--
--
pF
pF
pF
pF
0714.99Rev0
3
©1999 Space Electronics Inc.
All rights reserved.
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