Nuclear Event Detector
V
B
8
9
HSN-3000
V
L
1
Threshold
Adjust
V
H
14
Ω
10 k
Detector
(Pin Diode)
2
NED
Amplifier
Pulse Timer
10 k
Ω
Logic
Latch
BIT
6
LED
13
NEF
11
Flag
Reset
7
5
4
12
GND
C
RC
Flag
Reset
Logic Diagram
F
EATURES
:
•
•
•
•
•
•
•
•
•
•
Detects ionizing radiation pulses
100% tested/certified detection threshold level
Adjustable circumvention period
Flag remembers event occurred
100% testable with built-in test
Detection threshold adjustability
Single +5V operation
Radiation hardness guaranteed
Compliant to MIL-PRF-38534 Class H
1
Flat pack (F) or DIP (L) packages
D
ESCRIPTION
:
Maxwell Technologies’ HSN-3000 radiation-hardened Hybrid
Nuclear Event Detector (NED) senses ionizing radiation pulses
generated by a nuclear event, such as the detonation of a nuclear
weapon, and rapidly switches its outputs from the normal high
state to a low state with a propagation delay time of less than
20ns. The active low Nuclear Event Detection signal (NED) is
used to initiate a wide variety of circumvention functions, thus
preventing upset and burnout of electronic components. The NED
output is also used to initiate both hardware and software recov-
ery. The Nuclear Evet Flag signal (NEF) remembers the event
occurred and is used to distinguish between an actual event and
power up. The signal input of either Flag Reset or Flag Reset can
be used to reset the NEF output. This high-speed, 14-pin hybrid
detector is used in electronic systems as a general-purpose cir-
cumvention device to protect memory, stop data processing, and
drive power supply switches as well as signal clamps.
The HSN-3000 is guaranteed to operate through three critical
environments: ionizing dose rate [10
12
rad(Si)/s], gamma total
dose [10
6
rad(Si)], and neutron fluence [5 x 10
13
n/cm
2
]. In addi-
tion, the device is designed to function throughout the transient
neutron pulse. The hybrid’s discrete design ensures a controlled
response in these radiation environments as well as immunity to
latchup. Each HSN-3000’s detection level and functionality are
tested in an ionizing dose rate environment. A certificate is pro-
vided with each serialized hybrid, reporting the radiation test
results and guaranteeing its performance. The device is also lot
qualified in the total dose and neutron environments to ensure
performance.
The detection threshold of the HSN-3000 is adjustable within the
range of 2 x 10
5
rad(Si)/s to 2 x 10
7
rad(Si)/s. This detection level
can be preset by Maxwell or adjusted by the user. Less than a
30% variation in detection threshold can be expected over the
entire operating temperature range.
Memory
R
ADIATION
H
ARDNESS
C
HARACTERISTICS
:
•
•
•
•
•
Dose Rate (operate-through): 1 x 10
12
rad(Si)/sec
Total Dose: 1 x 10
6
rad(Si)
Neutron Fluence: 5 x 10
13
n/cm
2
Approximate Detection Range: 2 x 10
5
- 2 x 10
7
rad(Si)/sec
Maxwell Technologies Specified, Controlled, Tested and
Guaranteed
1.
Manufactured for Maxwell Technologies by Teledyne Microelectronic
Technologies to MIL-PRF-38534, Class H, No RHA
01.07.05 Rev 3
All data sheets are subject to change without notice
1
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
©2005 Maxwell Technologies
All rights reserved.
MAXWELL [ MAXWELL TECHNOLOGIES ]
