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NM95HS02N14 Datasheet

  • NM95HS02N14

  • IC-HISEC CODE GENERATOR

  • 20頁

  • ETC

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NM95HS01 NM95HS02 HiSeC High Security Rolling Code Generator
February 1996
NM95HS01 NM95HS02
HiSeC
TM
High Security Rolling Code Generator
General Description
The NM95HS01 02 HiSeC Rolling Code Generator is a
small footprint monolithic CMOS device designed to pro-
vide a complete low-cost high security solution to the prob-
lem of generating encrypted signals for remote keyless en-
try (RKE) applications
The NM95HS01 02 generates a fully encoded bit stream
each time one of (up to) 4 switch inputs is activated The
patented coding scheme utilizes 2
48
possible user-pro-
grammable coding combinations and features high linear
complexity and correlation immunity High security is guar-
anteed by generating a unique (rolling) code for each trans-
mission and can be further enhanced by creating custom-
ized algorithms for individual customers With this product
each key can be designed to be both unique and highly
secure
The NM95HS01 02 supports either an IR or RF signal
transmitter and can be clocked with either an RC clock
(NM95HS01) or a crystal oscillator (NM95HS02) The de-
vice operates over a voltage range of 2 2V to 6 5V and
offers a low power standby mode (
k
1
mA)
for battery appli-
cations The product is available in both 8-pin and 14-pin SO
packages with 2 or 4 key switch inputs that can be used for
customer presets such as seat positions and vehicle oper-
ating functions such as car door locking unlocking
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
High security coding scheme with 2
48
combinations
High linear complexity and correlation immunity
2 2V to 6 5V operation
Less than 1
mA
standby current
Full resynchronization capability
Unique customized algorithm option
13 bytes on-chip non-volatile configuration memory
RC or XTAL clock options for to 4 1 MHz operation
Supports both IR and RF signal transmission
Selection of bit coding and transmission frame formats
Space saving narrow body SO8 or SO14 packages
Up to 4 key switch inputs on SO14 package
Applications
Y
Y
Y
Y
Remote Keyless Entry (RKE) applications
Burglar alarms garage door openers
Individualized recognition transmission systems
Personalized consumer automotive applications
Relevant Documents
Y
Y
Y
MM57HS01 datasheet
Designing and Programming a Complete HiSeC
TM
-
based RKE System
AN-985
HiSeC Remote Keyless Entry Solution Encoder Decod-
er Chip Set User鈥檚 Manual
AN-355
Patents Pending
Functional Block Diagram
TL D 12302 鈥?1
Note
Signals shown are internal logic signals
FIGURE 1
HiSeC
TM
and MICROWIRE
TM
are trademarks of National Semiconductor Corporation
C
1996 National Semiconductor Corporation
TL D 12302
RRD-B30M66 Printed in U S A

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