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Intersil Corporation - CMOS Asynchronous Serial Manchester Adapter (ASMA)

Numéro de référence HD-6408
Description CMOS Asynchronous Serial Manchester Adapter (ASMA)
Fabricant Intersil Corporation 
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HD-6408 fiche technique
HD-6408
March 1997
CMOS Asynchronous Serial
Manchester Adapter (ASMA)
Features
Description
• Low Bit Error Rate
• Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1MBit/s
• Sync Identification and Lock-In
• Clock Recovery
• Manchester II Encoder, Decoder
• Separate Encode and Decode
• Low Operating Power . . . . . . . . . . . . . . . . . 50mW at 5V
• Single Power Supply
• 24 Lead Package
Ordering Information
PACKAGE
PDIP
CERDIP
TEMP. RANGE
-40oC to +85oC
-40oC to +85oC
PART
NUMBER
HD3-6408-9
HD1-6408-9
PKG.
NO.
E24.6
E24.6
The HD-6408 is a CMOS/LSI Manchester Encoder/Decoder
for creating a very high speed asynchronous serial data bus.
The Encoder converts serial NRZ data (typically from a shift
register) to Manchester II encoded data, adding a sync pulse
and parity bit. The Decoder recognizes this sync pulse and
identifies it as a Command Sync or a Data Sync. The data is
then decoded and shifted out in NRZ code (typically into a
shift register). Finally, the parity bit is checked. If there were
no Manchester or parity errors the Decoder responds with a
valid word signal. The Decoder puts the Manchester code to
full use to provide clock recovery and excellent noise immu-
nity at these very high speeds.
The HD-6408 can be used in many commercial applications
such as security systems, environmental control systems,
serial data links and many others. It utilizes a single 12 x
clock and achieves data rates of up to one million bits per
second with a very minimum overhead of only 4 bits out of
20, leaving 16 bits for data.
Pinout
d
HD-6408 (DIP)
TOP VIEW
VW 1
ESC 2
TD 3
SDO 4
DC 5
BZI 6
BOI 7
UDI 8
DSC 9
CDS 10
DR 11
GND 12
24 VCC
23 EC
22 SCI
21 SD
20 SS
19 EE
18 SDI
17 BOO
16 OI
15 BZO
14 DBS
13 MR
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
5-1
File Number 2952.1

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