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DP8464BTP-3 PDF预览

DP8464BTP-3

更新时间: 2024-01-24 06:42:34
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

DP8464BTP-3 技术参数

生命周期:Obsolete包装说明:QFP,
Reach Compliance Code:unknown风险等级:5.83
接口集成电路类型:PULSE DETECTORJESD-30 代码:S-PQFP-G40
长度:7.264 mm功能数量:1
端子数量:40最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:QFP封装形状:SQUARE
封装形式:FLATPACK认证状态:Not Qualified
座面最大高度:1.905 mm最大压摆率:75 mA
最大供电电压:13.2 V最小供电电压:10.8 V
标称供电电压:12 V表面贴装:YES
技术:BIPOLAR温度等级:COMMERCIAL
端子形式:GULL WING端子节距:0.508 mm
端子位置:QUAD宽度:7.264 mm

DP8464BTP-3 数据手册

 浏览型号DP8464BTP-3的Datasheet PDF文件第2页浏览型号DP8464BTP-3的Datasheet PDF文件第3页浏览型号DP8464BTP-3的Datasheet PDF文件第4页浏览型号DP8464BTP-3的Datasheet PDF文件第5页浏览型号DP8464BTP-3的Datasheet PDF文件第6页浏览型号DP8464BTP-3的Datasheet PDF文件第7页 
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  
Y
Wide input signal amplitude rangeÐfrom 20 mVpp to  
660 mVpp differential  
Y
Data rates up to 15 Megabits/sec 2,7 code  
Y
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.  
Y
Input capacitively coupled directly from the disk head  
read/write amplifier  
Y
Adjustable comparator hysteresis  
Y
AGC and differentiator time constants set by external  
components  
Y
TTL compatible digital Inputs and Outputs  
Y
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  
Y
g
Standard drive supply: 12V 10%  
Y
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  
É
Block Diagram  
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.  
C
1995 National Semiconductor Corporation  
TL/F/5283  
RRD-B30M105/Printed in U. S. A.  

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