MC10E197 Datasheet, PDF (1/16 Pages) ON Semiconductor – DATA SEPARATOR

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advance Information
Data Separator
MC10E197
The MC10E197 is an integrated data separator designed for use in
high speed hard disk drive applications. With data rate capabilities of up
to 50Mb/s the device is ideally suited for today’s and future
state-of-the-art hard disk designs.
The E197 is typically driven by a pulse detector which reads the
magnetic information from the storage disk and changes it into ECL
pulses. The device is capable of operating on both 2:7 and 1:7 RLL
coding schemes. Note that the E197 does not do any decoding but rather
prepares the disk data for decoding by another device.
For applications with higher data rate needs, such as tape drive
systems, the device accepts an external VCO. The frequency capability
of the integrated VCO is the factor which limits the device to 50Mb/s.
A special anti-equivocation circuit has been employed to ensure timely
lock-up when the arriving data and VCO edges are coincident.
Unlike the majority of the devices in the ECLinPS family, the E197 is
available in only 10H compatible ECL. The device is available in the
standard 28-lead PLCC.
Since the E197 contains both analog and digital circuitry, separate
supply and ground pins have been provided to minimize noise coupling
inside the device. The device can operate on either standard negative
ECL supplies or, as is more common, on positive voltage supplies.
• 2:7 and 1:7 RLL Format Compatible
• Fully Integrated VCO for 50Mb/s Operation
• External VCO Input for Higher Operating Frequency
• Anti-equivocation Circuitry to Ensure PLL Lock
RDEN
LOGIC DIAGRAM
DATA SEPARATOR
FN SUFFIX
PLASTIC PACKAGE
CASE 776-02
REFCLK
CAP1
CAP2
VCOIN
EXTVCO
ENVCO
RAWD
INTERNAL
VCO
VCO
MUX
PHASE FREQUENCY
DETECTOR
DATA
PHASE
DETECTOR
PHASE
DETECTOR
MUX
CHARGE
PUMP
CURRENT-
SOURCES
PUMPUP
PUMPDN
RSETUP
RSETDN
ACQ
TYPE
ACQUISITION
CIRCUITRY
CLOCK &
DATA
BUFFER
RDATA
RDCLK
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
12/93
© Motorola, Inc. 1996
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