===================================================================
                        7540A IDE DRIVE
===================================================================

KEY FEATURES:

  * 14ms average seek               * 32K on-board buffer 
  * Low power consumption           * Zone density recording 
  * 1:1 interleave                  * Dual drive master/slave support 
  * Rotary voice coil               * Automatic actuator lock 
  * Single-sided surface mount PCBA * Multi-Word DMA Mode 1
  * Energy Stary compliant          * 

SPECIFICATIONS:

Formatted capacity (w/o OS limitation): .... 540,170,240 Bytes
Formatted capacity (w/ OS limitation): ..... 528,482,304 Bytes
Bytes per sector:........................... 512
Integrated Controller/Interface: ........... AT 
Actuator type: ............................. Voice Coil
Number of Disks: ........................... 2
Data Surfaces: ............................. 4
Data Heads: ................................ 4
Servo: ..................................... Embedded
Tracks per surface: ........................ 2,666
Track Density (average): ................... 3,100 tpi
Flux Density (average): .................... 48.07 kfci
Recording Density: ......................... 64.10 kfci
Data Zones per Surface: .................... 8

Sectors per track: ......................... 72 to 123

PERFORMANCE (Typical):

Seek times* (ms)
     Track to track: ....................... 3
     Average: .............................. 14 **
     Maximum: .............................. 31

Average latency (ms): ...................... 8.45
Spindle speed (+-0.1%): .................... 3,551 RPM
Controller overhead: ....................... 0.5 ms

Data transfer rate (Mbytes per sec)
  To/From Media (MB/sec): .................. 2.7 - 4.75
  To/from Buffer (without I/O CHRDY): ...... PIO Mode 2 8.33
  To/from Interface (with I/O CHRDY): ...... PIO Mode 3 11.11
  DMA Transfers (sustained): ............... Mode 0
  DMA Transfers (burst): ................... Mode 1

Start time (0 - Drive Ready). .............. <=9 sec Avg.
Stop Time/Power Down: ...................... <=3.5 sec Avg.


Power Requirements (Average):

    Mode         +12VDC +-8%  +5VDC +-5%  Power/Duration
    ----         -----------  ----------  --------------
    Spin-up       1100mA       380mA      15.1W 1 sec max.
    Read/Write     196mA       360mA       4.2W
    Active         200mA       360mA       4.2W
    Idle           180mA       340mA       3.9W
    Park           150mA       100mA       2.3W
    Standby       0.92mA       137mA       0.7W
    Sleep         0.64mA       120mA       0.6W

Physical:

    Height:  1.00"  ( 25.4 mm)
    Length:  5.75"  (146.1 mm)
    Width:   4.00"  (101.6 mm)
    Weight:  1.2 lbs. (0.5 kg)

Environmental:

Temperature (Degrees C)
    Operating (stabilized).................. 5C to 50C
    Non-operating .......................... -40C to 71C
    Thermal Gradient ....................... 20 C per hr

Humidity ***
    Operating .............................. 5% to 95% non-condensing
    Non-operating .......................... 5% to 95% non-condensing
    Maximum wet bulb ....................... 27.6  
    Maximum Gradient / hr .................. 20%

Altitude (relative to sea level)
    Operating .............................. -200 to 10,000 feet
    Non-operating .......................... MIL-STD-810E
    
Reliability and Maintenance:

MTBF ....................................... >300,000 hours 
Preventative Maintenance ................... None
Component design life ...................... 5 years (minimum)
Data reliability............................ <10 per 10^13 bits read
Seek Error Rate ............................ <=10^7
Shock & Vibration (typical)
          
    Operating Shock ........................ 15 Gs, 11ms (no errors)
    Non-Operating Shock .................... 70Gs
    
    Operating Vibration (without non-recoverable errors)
      10Hz at 0.004 G^2/Hz
      40Hz at 0.004 G^2/Hz
      500Hz at 0.00004 G^2/Hz

    Non-operating Vibration (without non-recoverable errors)
      10Hz at 0.015 G^2/Hz
      40Hz at 0.015 G^2/Hz
      500Hz at 0.00015 G^2/Hz

    Operating, swept sine
     (1 octave/minute)
       5 to 20 Hz: ......................... 0.049" double amplitude
       20 to 300 Hz: ....................... 1.0 G peak amplitude


Acoustic Noise
    Sound power (per ISO 7779) ............. 3.5 belA
    Loudness ............................... 1.92 sones
    Sharpness .............................. 1.48 Acums


*   At nominal DC input voltages
**  The average of 10,000 random seek times (measured on independent
    test equipment) constitutes the average seek time specification.
*** Operating and non-operating specs meet MIL-STD-810E. 
    Method 507.3 Table 507.3-I High humidity diurnal category. 
    Natural, High Humidity, Cyclic (Cycle 3)

==============================================================================

                       7540AV JUMPER DESIGNATION
                                            |J24|J23|J22|J20|
      +-----------------------------------------------------+
      | Cable Select                        |   |   |   |   |
      |  Disabled*                          | O |   |   |   |
      |  Enabled                            | J |   |   |   |
      +-----------------------------------------------------+
      | Write Cache                         |   |   |   |   |
      |  Enabled*                           |   | O |   |   |
      |  Disabled                           |   | J |   |   |
      +-----------------------------------------------------+
      | Default Parameters (for auto-detect)|   |   |   |   |
      |  1040 X 16 X 63*                    |   |   | O |   |
      |  1024 X 16 X 63                     |   |   | J |   |  
      +-----------------------------------------------------+
      | Master/Slave                        |   |   |   |   |
      |  Only drive in single drive system* |   |   |   | J |
      |  Master in dual drive system*       |   |   |   | J |
      |  Slave in dual drive system         |   |   |   | O |
      +-----------------------------------------------------+
         J=Jumpered O=Open *=Default                      
         Note: Jumper J21 & J25 are factory reserved. Do not use. 
               A spare shunt is shipped between J22 & J23.


+----\    /---------------\      /--\   /-------------\      /--\   /--------+
|     ----                 ------    ---               ------    ---         | 
|                                                            +------+     +---+
|  +                    V----------------------------------> ||:::::|     |   |
|              +-------------------+                         +------+     |   |
|              |     J21 J23 J25   |                            +         |   |
|              |  +-------------+  |                                      |   |
|              |  | * 0 *** 0 0 |  |                                      |   |
|              |  | * 0 0 0 0 0 |  |                                      |J1 |
|              |  +-------------+  |                                      |   |
|              |   J20 J22 J24     |                                      |   |
|              +-------------------+                                      |   |
|                                                +                        |   |
|                                                                         |   |
|                                                                         |   |
|                                                                         +---|
|                                                                        +----|
|    +                                                              +    |    |
|                                                                        |    |
|                                                                        | J2 |
|     ----                 ------    ---               ------    ---     |    |
+----/    \---------------/      \--/   \-------------/      \--/   \---------+


                            CMOS Configuration:     

                    Cyls   Hds  Write  Landing Sec/Trk
                                PreComp  Zone
                    ----------------------------------
(w OS limitation)   1024   16     0       0       63
            Yields: 528 Million Bytes (Approx. 504 Mega-Bytes)

(w/o OS limitation) 1046   16     0       0       63
            Yields: 540 Million Bytes (Approx. 515 Mega-Bytes)


                7540AV is a trademark of Maxtor Corporation.
               AT is a registered trademark of IBM Corporation.
               Specifications subject to change without notice.
                    Copyright 1994, 95, Maxtor Corporation.
                         Rev B    3/16/95    Anderson
============================================================================
