®
HD-6409
Datasheet
July 29, 2005
FN2951.2
CMOS Manchester Encoder-Decoder
The HD-6409 Manchester Encoder-Decoder (MED) is a high
speed, low power device manufactured using self-aligned
silicon gate technology. The device is intended for use in
serial data communication, and can be operated in either of
two modes. In the converter mode, the MED converts Non
return-to-Zero code (NRZ) into Manchester code and
decodes Manchester code into Nonreturn-to-Zero code. For
serial data communication, Manchester code does not have
some of the deficiencies inherent in Nonreturn-to-Zero code.
For instance, use of the MED on a serial line eliminates DC
components, provides clock recovery, and gives a relatively
high degree of noise immunity. Because the MED converts
the most commonly used code (NRZ) to Manchester code,
the advantages of using Manchester code are easily realized
in a serial data link.
In the Repeater mode, the MED accepts Manchester code
input and reconstructs it with a recovered clock. This
minimizes the effects of noise on a serial data link. A digital
phase lock loop generates the recovered clock. A maximum
data rate of 1MHz requires only 50mW of power.
Manchester code is used in magnetic tape recording and in
fiber optic communication, and generally is used where data
accuracy is imperative. Because it frames blocks of data, the
HD-6409 easily interfaces to protocol controllers.
Features
• Converter or Repeater Mode
• Independent Manchester Encoder and Decoder
Operation
• Static to One Megabit/sec Data Rate Guaranteed
• Low Bit Error Rate
• Digital PLL Clock Recovery
• On Chip Oscillator
• Low Operating Power: 50mW Typical at +5V
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinouts
HD-6409 (PDIP, SOIC)
TOP VIEW
BZI
BOI
UDI
SD/CDS
SDO
SRST
NVM
DCLK
RST
1
2
3
4
5
6
7
8
9
20 V
CC
19 BOO
18 BZO
17 SS
16 ECLK
15 CTS
14 MS
13 OX
12 IX
11 CO
Ordering Information
PACKAGE
PDIP
SOIC
SOIC
(Pb-free)
SOIC Tape &
Reel
(Pb-free)
TEMPERATURE
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
1 MEGABIT/SEC
HD3-6409-9
HD9P6409-9
HD9P6409-9Z
(Note)
HD9P6409-9Z96
(Note)
PKG.
DWG. #
E20.3
M20.3
M20.3
M20.3
GND 10
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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