M
e
m
o
r
y
128 Channel Multiplexer
81840
FEATURES: DESCRIPTION:
16:1
1840A
16:1
1840A
16:1
1840A
16:1
1840A
16:1
1840A
16:1
1840A
16:1
1840A
(8 TOTAL 1840A’s)
GRND
5
4
GRND
5
4
GRNDGRND
OUT IN
IN
OUT
8 8
5
16
16
GRND
8 5
GRND
8 5
IN OUT
8
8
GRND
8 5
IN
NEGATIVE
OUTPUT
POSITIVE
OUTPUT
OUT
4 4 84
ADDRESS ENABLE
128 TOTAL
ANALOG INPUTS
GROUND
REFERENCE
INPUTS
SPARE
INPUTS
ADDRESS
ENABLE
SPARE
OUTPUT
ADDRESS
ENABLE
7
SPARE
INPUT
VREF
(+5V)
GRND ADDRESS
ENABLE
SPARE
OUTPUT
ADDRESS
ENABLE
88
IN
IN
ADDRESS ENABLE
COMMON TO ALL
INPUT MUX’s
CLAMP/
PRECHARGE
ADDRESS
ENABLE
CASCADE
INPUTBYPASS
V+
(+15V)
V-
(-15V)
+
-
IN
IN
See page 2 for pin assignments.
81840
1All data sheets are subject to change without notice
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com ©2021 Maxwell Technologies
All rights reserved.
06.17.02 REV 5
• 128 channel multiplexer, MCM
Package:
- 256 pin RAD-PAK® quad flat pack
Total dose hardness:
- > 300 krads(Si)
- Dependent upon orbit
Excellent Single Event Effects:
SEL: > 110 MeV-cm
2
/mg
SEU: > 110 MeV-cm
2
/mg
Maxwell Technologies’ 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 RAD-PAK® 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.