TM
HD-6409/883
CMOS Manchester Encoder-Decoder
Description
The HD-6409/883 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 con-
verts Nonreturn-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 elimi-
nates 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 Manches-
ter code, the advantages of using Manchester code are eas-
ily realized in a serial data link.
In the Repeater mode, the MED accepts Manchester code
input and reconstructs it with a recovered clock. This mini-
mizes 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-6409/883 easily interfaces to protocol controllers.
March 1997
Features
鈥?This Circuit is Processed in Accordance to MIL-STD-
883 and is Fully Conformant Under the Provisions of
Paragraph 1.2.1.
鈥?Converter or Repeater Mode
鈥?Independent Manchester Encoder and Decoder
Operation
鈥?Static to One Megabit/Sec Data Rate Guaranteed
鈥?Low Bit Error Rate
鈥?Digital PLL Clock Recovery
鈥?On Chip Oscillator
鈥?Low Operating Power: 50mW Typical at +5V
鈥?Available in 20 Lead Dual-In-Line and 20 Pad LCC
Package
Ordering Information
PART NUMBER
HD1-6409/883
HD4-6409/883
TEMPERATURE
RANGE
-55
o
C to +125
o
C
-55
o
C to +125
o
C
PACKAGE
CERDIP
CLCC
PKG.
NO.
F20.3
J20.A
Pinouts
HD1-6409/883 (CERDIP)
TOP VIEW
HD4-6409/883 (CLCC)
TOP VIEW
BZI
BOI
UDI
SD/CDS
SDO
SRST
NVM
DCLK
RST
1
2
3
4
5
6
7
8
9
20 VCC
19 BOO
18 BZO
17 SS
16 ECLK
15 CTS
14 MS
13 OX
12 IX
11 CO
9
RST
10
GND
11
CO
12
IX
13
OX
SRST
NVM
DCLK
6
7
8
16 ECLK
15 CTS
14 MS
SD/CDS
SDO
4
5
3
2
1
20
19
18 BZO
17 SS
GND 10
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
BOO
VCC
BOI
UDI
BZI
FN2959.1
135
INTERSIL
1
2
3
4
5
6
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