HD-15531_02 Datasheet, PDF (1/16 Pages) Intersil Corporation – CMOS Manchester Encoder-Decoder

TM
HD-15531
March 1997
CMOS Manchester Encoder-Decoder
Features
Description
• Support of MIL-STD-1553
• Data Rate (15531B) . . . . . . . . . . . . . . . .2.5 Megabit/Sec
• Data Rate (15531) . . . . . . . . . . . . . . . . .1.25 Megabit/Sec
• Variable Frame Length to 32 Bits
• Sync Identification and Lock-In
• Separate Manchester II Encode, Decode
• Low Operating Power . . . . . . . . . . . . . . . . . 50mW at 5V
The Intersil HD-15531 is a high performance CMOS device
intended to service the requirements of MIL-STD-1553 and
similar Manchester II encoded, time division multiplexed
serial data protocols. This LSI chip is divided into two sec-
tions, an Encoder and a Decoder. These sections operate
independently of each other, except for the master reset and
word length functions. This circuit provides many of the
requirements of MIL-STD-1553. The Encoder produces the
sync pulse and the parity bit as well as the encoding of the
data bits. The Decoder recognizes the sync pulse and identi-
fies it as well as decoding the data bits and checking parity.
Ordering Information
TEMP. RANGE 1.25MBIT
PACKAGE
(^oC)
/SEC
PDIP
-40 to 85
-
2.5MBIT PKG.
/SEC
NO.
HD3-15531B-9 E40.6
The HD-15531 also surpasses the requirements of MIL-
STD-1553 by allowing the word length to be programmable
(from 2 to 28 data bits). A frame consists of three bits for
sync followed by the data word (2 to 28 data bits) followed by
one bit of parity, thus, the frame length will vary from 6 to 32
bit periods. This chip also allows selection of either even or
odd parity for the Encoder and Decoder separately.
CERDIP
DESC
(CERDIP)
-40 to 85
-55 to 125
-55 to 125
-55 to 125
HD1-15531-9 HD1-15531B-9 F40.6
HD1-15531-8 HD1-15531B-8 F40.6
5962-
HD1-15531
9054901MQA
F40.6
5962-
HD1-15531B F40.6
9054902MQA
This integrated circuit is fully guaranteed to support the
1MHz data rate of MIL-STD-1553 over both temperature and
voltage. For high speed applications the 15531B will support
a 2.5 Megabit/sec data rate.
The HD-15531 can also be used in many party line digital
data communications applications, such as a local area net-
work or an environmental control system driven from a single
twisted pair of fiber optic cable throughout a building.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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