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參數(shù)資料
| 型號： | P32P4911A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 光電元器件 |
| 英文描述： | PRML Read Channel with PR4, 8/9 ENDEC, FWR Servo |
| 中文描述： | 1 CHANNEL READ CHANNEL, PQFP100 |
| 封裝： | 14 X 14 X 1.40 MM, PLASTIC, LQFP-100 |
| 文件頁數(shù)： | 2/63頁 |
| 文件大?。?/td> | 257K |
| 代理商： | P32P4911A |
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1996 Jul 25
2
853-1850 17093
Philips Semiconductors
Product specification
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
P32P4911A
GENERAL DESCRIPTION
The Philips Semiconductors P32P4911A is a high performance BiCMOS read channel IC that provides all of the
functions needed to implement an entire Partial Response Class 4 (PR4) read channel for zoned recording hard disk
drive systems with data rates from 42 to 125 Mbit/s or 33 to 100 Mbit/s. Functional blocks include AGC, programmable
filter, adaptive transversal filter, Viterbi qualifier, 8,9 GCR ENDEC, data synchronizer, time base generator, and FWR
servo.
Programmable functions such as data rate, filter cutoff, filter boost, etc., are controlled by writing to the serial port
registers so no external component changes are required to change zones.
The part requires a single +5V power supply. The Philips Semiconductors P32P4911A utilizes an advanced BiCMOS
process technology along with advanced circuit design techniques which result in high performance devices with low
power consumption.
FEATURES
General:
Register programmable data rates from 42 to 125 Mbit/s or 33 to 100 Mbit/s
Sampled data read channel with Viterbi qualification
Programmable filter for PR4 equalization
Five tap transversal filter with adaptive PR4 equalization
8/9 GCR ENDEC
Data Scrambler/Descrambler
Presettable Precoder State
Programmable write precompensation
Low operating power (0.925 W typical at 5V)
Register programmable power management (<5 mW power down mode)
4-bit nibble and byte-wide bi-directional NRZ data interfaces
8-bit Direct Write mode automatically configured for RCLK = VCO/8
Serial interface port for access to internal program storage registers
Single power supply (5V
±
10%)
Small footprint, 100-lead LQFP package
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