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                     Maxtor LXT-437A ATA IDE Drive
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Key features:

* 12 read, 13 write msec average seek time
* Advanced buffer implementation (read ahead cache)
* Proven AT compatability
* Auto parking
* No Pre-Comp required

SPECIFICATIONS:

Performance;

Capacity, typical format
* Per drive (Mbytes)...........437
* Per sector (bytes)...........512
* Spare capacity (Mbytes)......8.7

AT Bus Transfer(Mbytes)........6.0

Disk Transfer (Mbits/sec)......13.27

Seek time (msec), typical
* Read.........................12
* Write........................13
* Track to Track................3
* Maximum......................30

Rotational Speed (RPM).......3600 +/- 5%

Average latency (msec).......8.33

FUNCTIONAL:

* Data zones....................8
* Bit density (Kbpi)........33-44
* Track density (tpi).......1,600
* Disks.........................5
* Data heads....................9
* Servo heads...................1
* Physical tracks..........13,977
* Sectors per track.........47-72
* Physical cylinders........1,560

PHYSICAL:

Dimentions

* Height....................1.625 in. (41.3 mm)
* Width.....................4.000 in. (101.6 mm)
* Depth                     5.750 in. (146 mm)
* Weight....................2.2 lb. (1 kg.)

Temperature limits

* Operating.................5-50 (C)
* Non-operating...........-40-65 (C)
* Temperature gradiant/Hr..20 (C)/hr.

Relative humidity limits ( Non condensing)

* Operating.................5 to 80%
* Non-operating.............5 to 80%
* Maximum gradiant/Hr............20%
* Maximum wet bulb...............27.6 (C)

Shock (G's)

* Non-operating..................50
* Operating (no errors)...........3
* Operating (recoverable errors).10

POWER:

* +12VDC  +/- 5%, 0.6A (typical) 2.1A, Max.
* +5VDC +/- 5%, 0.5A (typical)
* Power dissapation (typical) 11 WAtts

RELIABILITY:

MTBF.......................150,000 Hrs.
PM........................Not Required
MTTR........................20 Minutes
Component design life..........5 years(min)

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                            LXT-xxxA PCB Layout
Ŀ Ŀ  Ŀ  Ŀ    Ŀ  Ŀ  Ŀ
                                                
 J3                  ͻ                            
        J6               9  7  5  3  1                                 
 Ŀ           Ŀ                          
 :::|:<Ķ   *  *  *    *                             
                 *  *  *    *                         J5  
                                                  
                        10  8  6  4  2                             
                     ͼ                        
                                                                      
 J1                                                                   
                                                                  J2  
                                                                      
                                                                      
                                                                      
                                                                     
                                                                     
                                                              J4  
          Ŀ        To attach an external LED, use pins 9-10> 
                                                               
                                                              Ŀ
    

    LXT-A Jumper Designations           1-23-45-67-89-10
    Ĵ
     Master/Slave                                      
      Only drive in single drive sys    R              
      Master in dual drive system       R              
      Slave in dual drive system        J              
    Ĵ
     Drive Active (System LED)             J           
    Ĵ
     Slave Present                                     
      One drive in single drive sys           R        
      Master in dual drive system             R        
      Slave in dual drive system              O        
    Ĵ
     Two Drive System                                  
      One drive in single drive sys              R     
      Master in dual drive sys                   J     
      Slave in dual drive sys                    R     
    Ĵ
     Sync Spindle Pulse Source                         
      If receiving pulse                            R  
      If transmitting pulse*                        J  
    
      J=Jumpered R=Removed O=Optional
      *=This jumper may only be used
        only on one drive in an array

     CMOS Configuration:     Cyls  Hds  Write  Landing Sec/Trk
                                       PreComp  Zone
     416.9MB Capacity        ---------------------------------
     (437 Million Bytes)     847    16     0     847       63

          LXT-437A & LXT-437S are trademarks of Maxtor Corporation.
              AT is a registered trademark of IBM Corporation.
              Specifications subject to change without notice.
                     Copyright 1992 Maxtor Corporation.
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