HD-6408
Data Sheet October 1, 2015 FN2952.3
CMOS Asynchronous Serial Manchester Features
Adapter (ASMA)
Low Bit Error Rate
The HD-6408 is a CMOS/LSI Manchester Encoder/Decoder
Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1MBit/s
for creating a very high speed asynchronous serial data bus.
Sync Identification and Lock-In
The Encoder converts serial NRZ data (typically from a shift
register) to Manchester II encoded data, adding a sync pulse
Clock Recovery
and parity bit. The Decoder recognizes this sync pulse and
Manchester II Encoder, Decoder
identifies it as a Command Sync or a Data Sync. The data is
then decoded and shifted out in NRZ code (typically into a
Separate Encode and Decode
shift register). Finally, the parity bit is checked. If there were
Low Operating Power. . . . . . . . . . . . . . . . . . . 50mW at 5V
no Manchester or parity errors the Decoder responds with a
valid word signal. The Decoder puts the Manchester code to Single Power Supply
full use to provide clock recovery and excellent noise
24 Ld Package
immunity at these very high speeds.
Pb-Free Plus Anneal Available (RoHS Compliant)
The HD-6408 can be used in many commercial applications
such as security systems, environmental control systems,
Ordering Information
serial data links and many others. It utilizes a single 12 x
TEMP.
clock and achieves data rates of up to one million bits per
PART PART RANGE PKG.
second with a very minimum overhead of only 4 bits out of
NUMBER MARKING (C) PACKAGE NO.
20, leaving 16 bits for data.
HD3-6408-9 HD3-6408-9 -40 to +85 24 Ld PDIP E24.6
No longer
Pinout
available or
HD-6408 (DIP) supported,
TOP VIEW recommended
replacement
HD3-6408-9Z
VW 1 24 V
CC
ESC 2 23 EC
HD3-6408-9Z HD3-6408-9Z -40 to +85 24 Ld PDIP* E24.6
(Note) (Pb-Free)
TD 3 22 SCI
SDO 4 21 SD
HD1-6408-9 HD1-6408-9 -40 to +85 24 Ld CERDIP F24.6
DC 5 20 SS
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
BZI 6 19 EE
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
BOI 7 18 SDI
compatible with both SnPb and Pb-free soldering operations. Intersil
UDI 8 17 BOO
Pb-free products are MSL classified at Pb-free peak reflow
9 16 OI
DSC temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
CDS 10 15 BZO
*Pb-free PDIPs can be used for through hole wave solder processing
DR 11 14 DBS
only. They are not intended for use in Reflow solder processing
GND 12 13 MR
applications.
d
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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All other trademarks mentioned are the property of their respective owners.HD-6408
Block Diagrams
ENCODER DECODER
11
DR BIT COUNTER
23 14
EC DBS
6
13
VALID
MR
VALID
1
WORD PARITY
WORD
VW
TEST CHECK
22
LATCH
BIT COUNTER
SCI 2
CIRCUIT
2
3
ESC
TD SYNC
10
LATCH
CDS
21
COUNT
SD
RESET
DECODER
20
5
SS 4
SYNC NRZ
CLOCK
DC
CHARACTER
OUTPUT
SDO
SYNCHRO-
15 9
IDENTIFIER
PORT
BZO NIZER
16 DSC
CHARACTER
PARITY
OI
FORMER
17
BOO
6
BZI
18
DATA
19
7
SDI
TRANSITION
BOI
EE FINDER
8
UDI
FN2952.3
2
October 1, 2015