128 Channel Multiplexer
ADDRESS ENABLE
COMMON TO ALL
INPUT MUX鈥檚
8
81840
CLAMP/
PRECHARGE
8
ADDRESS
ENABLE
4
BYPASS
CASCADE
INPUT
7
ADDRESS
ENABLE
4
V+
(+15V)
V-
(-15V)
16
IN
16:1
1840A
IN
5
GRND
IN
5
GRND
128 TOTAL
ANALOG INPUTS
5
16:1
1840A
8
OUT
IN
16:1
1840A
8
OUT
+
POSITIVE
OUTPUT
GRND
16
IN
GRND
16:1
1840A
(8 TOTAL 1840A鈥檚)
81840
GROUND
REFERENCE
INPUTS
8
IN
16:1
1840A
5
OUT
-
NEGATIVE
OUTPUT
8
SPARE
INPUTS
8
IN
16:1
1840A
GRND
5
IN
16:1
1840A
5
OUT
SPARE
OUTPUT
8
8
ADDRESS ENABLE
GRND
GRND
Memory
See page 2 for pin assignments.
4
ADDRESS
ENABLE
SPARE
OUTPUT
4
ADDRESS GRND
ENABLE
VREF
(+5V)
8
SPARE
INPUT
4
ADDRESS
ENABLE
F
EATURES
:
鈥?128 channel multiplexer, MCM
鈥?Package:
- 256 pin R
AD
-P
AK
廬 quad flat pack
鈥?Total dose hardness:
- > 300 krads(Si)
鈥?- Dependent upon orbit
鈥?Excellent Single Event Effects:
SEL: > 110 MeV-cm
2
/mg
SEU: > 110 MeV-cm
2
/mg
D
ESCRIPTION
:
Maxwell Technologies鈥?81840 high-performance 128-channel
multiplexer features a typical 300 krad (Si) total dose tolerance.
This datasheet defines the design, performance, and test require-
ments for a hermetic, telemetry multiplexer, multi-chip-module
(MCM), utilizing chip and wire technology to be used in space
systems. The 81840 is intended for use in the environments
encountered by high reliability spacecraft applications. The pat-
ented radiation-hardened R
AD
-P
AK
廬 technology incorporates radi-
ation shielding in the microcircuit package. Capable of surviving
in-space environment, the 81840 is ideal for satellite, spacecraft,
and space probe missions. It is available up to Class K screening.
06.17.02 REV 5
All data sheets are subject to change without notice
1
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