Datasheet > DP8464BTP-3

DP8464BTP-3

更新时间： 2024-11-26 23:16:31

品牌	Logo	应用领域
美国国家半导体 - NSC		脉冲
页数	文件大小	规格书
26页	384K
描述
Disk Pulse Detector

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中文翻译

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数据手册

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DP8464BTP-3 数据手册

June 1989

DP8464B Disk Pulse Detector

General Description

The DP8464B Disk Pulse Detector utilizes analog and digital

circuitry to detect amplitude peaks of the signal received

from the read/write amplifier fitted with the heads of disk

drives. The DP8464B produces a TTL compatible output

which, on the positive leading edge, indicates a signal peak.

Electrically, these peaks correspond to flux reversals on the

magnetic medium. The signal from the read/write amplifier

when reading a disk is therefore a series of pulses with

alternating polarity. The Disk Pulse Detector accurately rep-

licates the time position of these peaks.

package. Normally, it will be fitted in the disk drive, and its

output may be directly connected to the DP8461 or the

DP8465 Data Separator.

Features

Wide input signal amplitude rangeÐfrom 20 mVpp to

660 mVpp differential

Data rates up to 15 Megabits/sec 2,7 code

On-chip differential gain controlled amplifier, differentia-

tor, comparator gating circuitry, and output pulse

generator

The DP8464B Disk Pulse Detector has three main sections:

the Amplifier, the time channel and the gate channel. The

Amplifier section consists of a wide bandwidth amplifier, a

full wave rectifier and Automatic Gain Control (AGC). The

time channel is made from the differentiator and its follow-

ing bi-directional one shot, while the gate channel is made

from the differential comparator with hysteresis, the D flip-

flop and its following bi-directional one shot.

Input capacitively coupled directly from the disk head

read/write amplifier

Adjustable comparator hysteresis

AGC and differentiator time constants set by external

components

TTL compatible digital Inputs and Outputs

Encoded Data Output may connect directly to the

DP8461 or DP8465 Data Separator

The Disk Pulse Detector is fabricated using an advanced

oxide isolated Schottky process, and has been designed to

function with data rates up to 15 Megabits/second. The

DP8464B is available in either a 300 mil wide 24-pin dual-in-

line package or a surface mount 28-pin plastic chip carrier

Standard drive supply: 12V 10%

Available in 300 mil wide 24-pin dual-in-line package, a

surface mount 28-pin plastic chip carrier package, or a

40-pin TapePak package

Block Diagram

Pin 5ÐNo connection

Pin 8ÐNo connection

TL/F/5283–7

Note: All pin numbers in this data sheet refer to the 24-pin dual-in-line package.

TapePakÉ is a registered trademark of National Semiconductor Corporation.

1995 National Semiconductor Corporation

TL/F/5283

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...26

中文翻译

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与DP8464BTP-3相关器件

型号	品牌	获取价格	描述	数据表
DP8464BV	NSC	获取价格	Disk Pulse Detector
DP8464BV-1	NSC	获取价格	Disk Pulse Detector
DP8464BV-2	NSC	获取价格	Disk Pulse Detector
DP8464BV-2	TI	获取价格	PULSE DETECTOR, PQCC28, PLASTIC, LCC-28
DP8464BV-2/A+	NSC	获取价格	IC,DISK PULSE DETECTOR,BIPOLAR/AS-TTL,LDCC,28PIN,PLASTIC
DP8464BV-2/B+	NSC	获取价格	IC,DISK PULSE DETECTOR,BIPOLAR/AS-TTL,LDCC,28PIN,PLASTIC
DP8464BV-3	TI	获取价格	PULSE DETECTOR, PQCC28, PLASTIC, LCC-28
DP8464BV-3	NSC	获取价格	Disk Pulse Detector
DP8464BV-3/A+	NSC	获取价格	IC,DISK PULSE DETECTOR,BIPOLAR/AS-TTL,LDCC,28PIN,PLASTIC
DP8464BV-3/B+	ETC	获取价格	Disk Pulse Detector

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