1

®

FN2952.2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2006. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

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

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

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

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