1
FN2952.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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HD-6408
CMOS Asynchronous Serial Manchester
Adapter (ASMA)
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
immunity 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
HD-6408 (DIP)
TOP VIEW
Features
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 Ld Package
Pb-Free Plus Anneal Available (RoHS Compliant)
d
1
2
3
4
5
6
7
8
9
10
11
12
VW
ESC
TD
SDO
DC
BZI
BOI
UDI
DSC
CDS
DR
GND
16
17
18
19
20
21
22
23
24
15
14
13
VCC
SCI
SD
SS
EE
BOO
BZO
DBS
MR
EC
SDI
OI
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
PKG.
NO.
HD3-6408-9
-40 to +85 24 Ld PDIP
E24.6
HD3-6408-9Z
(Note)
HD3-6408-9Z -40 to +85 24 Ld PDIP*
(Pb-Free)
E24.6
HD1-6408-9
-40 to +85 24 Ld CERDIP
F24.6
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
Data Sheet
March 7, 2006