Purchase DP849007, In-stock DP849007 From SeekIC.
Part Number: DP849007
Description: The DP84900 is designed to perform the encoding and decoding for disk memory systems. It is designed t...
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DP849007
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DataSheet
General Description
DP849007 General Description
The DP84900 is designed to perform the encoding and decoding for disk memory systems. It is designed to interface directly with National Semiconductor's integrated read channel circuits such as the DP8492. This Encoder/ Decoder (ENDEC) circuit employs a 2/3 (1,7) Run Length Limited (RLL) code type and supports hard sectored format. The ENDEC also includes write data precompensation circuitry which detects the need for precompensation. This circuitry issues early, late and level (PCOMP3T) output signals necessary for two levels of precompensation. Precompensation information is generated against both the 2T and 3T patterns. The precompensation circuitry can be bypassed by the setting of a bit in the control register.
A control register is included to configure the ENDEC and to select several device operation options such as output code inversion and TRI-STATEÉ of the NRZ output.
The DP84900 is available in a 20-pin SO and SSO package.
DP849007 Maximum Ratings
Supply Voltage ..............................................................7V
TTL Input Maximum Voltage ..........................................7V
Maximum Output Voltage.............................................. 7V
ESD Susceptibility ......................................2000V (Note 1)
TTL Input Maximum Voltage ..........................................7V
Maximum Output Voltage.............................................. 7V
ESD Susceptibility ......................................2000V (Note 1)
DP849007 Features
Operates at Non-Return to Zero (NRZ) data rates up to 25 Mbits/second
Single a5V power supply operation
Low Power dissipationÐ110 mW at 25 Mbits/sec NRZ rate
TTL compatible inputs and outputs
Supports write data precompensation with Early, Late and Level (PCOMP3T) output signals
Power Down Mode included
DC-erasure is available to support analog flaw map testing
Bypass mode available which permits un-encoded test
patterns to be issued at the CODEOUT pin
Single a5V power supply operation
Low Power dissipationÐ110 mW at 25 Mbits/sec NRZ rate
TTL compatible inputs and outputs
Supports write data precompensation with Early, Late and Level (PCOMP3T) output signals
Power Down Mode included
DC-erasure is available to support analog flaw map testing
Bypass mode available which permits un-encoded test
patterns to be issued at the CODEOUT pin
DP849007 Connection Diagram
DP802518
PDF/DataSheet Download
- Datasheet: DP802518
- File Size: 167262 KB
- Manufacturer: National Semiconductor
- Click here to Download
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The DP84900 is designed to perform the encoding and decoding for disk memory systems. DP849001 is designed to interface directly with National Semiconductor's integrated read channel circuits such as the DP8492. This Encoder/ Decoder (ENDEC) circuit decoding...
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