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All data sheets are subject to change without notice

(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com

Nuclear Event Detector

HSN-3000

©2005 Maxwell Technologies

All rights reserved.

01.07.05 Rev 3

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Detects ionizing radiation pulses

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100% tested/certified detection threshold level

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Adjustable circumvention period

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Flag remembers event occurred

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100% testable with built-in test

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Detection threshold adjustability

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Single +5V operation

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Radiation hardness guaranteed

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Flat pack (F) or DIP (L) packages

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Maxwell Technologies Specified, Controlled, Tested and

Guaranteed

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

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

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.

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Manufactured for Maxwell Technologies by Teledyne Microelectronic

Technologies to MIL-PRF-38534, Class H, No RHA

Detector

(Pin Diode)

Amplifier

Pulse Timer

LED

Logic

Latch

12

4

5

7

6

8

9

14

1

2

13

11

V

H

V

L

Threshold

Adjust

V

B

BIT

GND

CRC

Flag

Reset

Flag

Reset

NEF

NED

10 k

Ω

10 k

Ω

Logic Diagram