
T M 3 6 2    TANDON
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/HH               Cylinders     615|     |     |
Capacity form/unform    21/   25 MB        Heads           4|     |     |
Seek time   / track  80.0/ 2.0 ms          Sector/track   17|     |     |
Controller           MFM / ST506           Precompensation 65535
Cache/Buffer               KB              Landing Zone      663
Data transfer rate    0.625 MB/S int       Bytes/Sector      512
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         4 50    |    -40 60
Power: sleep              W     Humidity     %         8 80    |      8 80
       standby            W     Altitude    km    -0.457  2.972| -0.457 12.195
       idle          10.0 W     Shock        g        10       |     40
       seek               W     Rotation   RPM      3568
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h      15000
                                Warranty Month
Lift/Lock/Park     NO           Certificates     CSA,UL1950                   

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TANDON   TM362/TM262  PRODUCT SPECIFICATION AND USER'S MANUAL 1985

  +---------------------------------------------------------+  1
  |                                                         |XX
  |                                                         |XX J1
  |                                                      +1 |XX
  |                                             Terminator| |XX
  |                                             Resistor || |XX
  |                                                      || |XX
  |                                                      ++ |XX
  |                                                  W1+--+ |
  |                                          Drive   W2|  | |XX1
  |                                          Address W3|  | |XX J2
  |                                                  W4|  | |XX
  |                                                  W5|  | |XX
  |                                                    +--+ |XX
  |                                                         |XX
  |                                                         |  1
  |                                                         +---J3XX
  |                                                         +-----XX
  +---------------------------------------------------------+Power



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TANDON   TM362/TM262  PRODUCT SPECIFICATION AND USER'S MANUAL 1985

 Jumper Setting
 ==============

 Drive Address Jumper
 --------------------
                                            W1 Drive Select 0
   +--------+   +--------+   +--------+     W2 Drive Select 1
   ++++++++++   ++++++++++   ++++++++++     W3 Drive Select 2
          xx W1       xx W2      xx   W3    W4 Drive Select 0
                                 |          W5 Radial Configuration
   +--------+   +--------+      Jumper
   ++++++++++   ++++++++++
      xx    W4   xx      W5
      |          |
     Jumper     Jumper

 The drive address option allows the user to daisy chain up to four
 drives, and to enable one drive at a time. Drive Select is
 implemented by shorting one of the four connections, using the Drive
 Select Jumper. The W5 location is used for radial configurations.
 The drive is selected at all times with the W5 jumper installed.

 If jumper configurations are changed, power should be cycled off and
 on, so that the microprocessor can recognize the new configuration.


 Terminator Resistor
 -------------------
                        The terminator resistor pack, located on the
        +--------+      logic circuit board should be installed in the
        |********| ^    last drive of the daisy chain. All other
        +--------+ |    drives on the interface must have the
        ++++++++++      resistor pack removed. For a radial configura-
        +--------1      tion, all drives should have the terminator
                        resistor pack installed.



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TANDON   TM362/TM262  PRODUCT SPECIFICATION AND USER'S MANUAL 1985

 Notes on Installation
 =====================

 Installation direction
 ----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
      x           x                |  |     |           |     |  |
 +------x------x-------+           |  +-----+           +-----+  |
 +-+------x--x-------+-+           +--+                       +--+
   |       xx        |
   |     x    x      |
   +---x--------x----+
     x            x


 Mounting the Drive
 ------------------
 The drive can be mounted in any vertical or horizontal plane. On the
 TM362, eight 6-32 tapped holes are provided for mounting: two on each
 side and four on the bottom of the frame. On the TM262 twenty-four
 6-32 tapped holes are provided for mounting: eight on each side and
 eight on the bottom of the frame. The drive is manufactured with some
 critical internal alignments that must be maintained. Hence, it is
 important the mounting hardware does not introduce significant stress
 on the drive.

 Any mounting scheme in which the drive is part of the structural
 integrity of the enclosure is not permitted. Mounting schemes should
 allow for adjustable brackets or incorporate resilient members to
 accommodate tolerances.

 A sway space is required between the head disk assembly and other
 assemblies in the user system to allow for movement of the housing
 on its shock mounts 0.060 inces minimum.


 Daisy Chain/Radial Capability
 -----------------------------
 The circuit board provides address selection and gating functions
 that allow a user to daisy chain up to four drives or configure the
 drive for radial connection. A SIP resistor pack is used to
 terminate the interface. The resistor pack is removed from its SIP
 socket on all drive except the last one in a daisy chain. When a
 single-drive system or a radial configuration is used, the resistor
 pack remains plugged into the SIP socket.

 Both drives are compatible with controllers that use an ST506/412
 industry standard interface.


 Front Panel
 -----------
 Front panels equipped with an activity indicator are available for
 each of the drives.


 Air Filtration
 --------------
 A self-contained, recirculating air filtration system supplies clean
 air through a 0.3-micron filter. A secondary breather filter is
 provided to allow pressure equalization with the ambient atmosphere
 without contamination. The entire head-disk-actuator compartment is
 maintained at a slightly positive pressure to further ensure an
 ultraclean environment.


 Interface Connectors
 --------------------
 The electrical interface between the drive and the host system is via
 three connectors. J1 provides control signals for the drive. J2
 provides for the radial connection of read/write data signals. J3
 provides for D.C. power.


 J1/P1 Connector
 ---------------
 Connection to J1 is through a thirty-four-pin circuit board
 connector. The pins are numbered 1 through 34. The even pins are
 located on the solder side of the circuit board. A key slot is
 provided between Pins 4 and 6. The recommended mating connector for
 P1 is AMP ribbon connector P/N 88383-3, without ears.


 J2/P2 Connector
 ---------------
 Connection to J2 is through a twenty-pin circuit board edge
 connector. The pins are numbered 1 through 20. The even pins are
 located on the solder side of the circuit board. The recommended
 mating connector for P2 is AMP ribbon connector P/N 88373-3, without
 ears. A key slot is provided between Pins 4 and 6.


 J3/P3 Connector
 ---------------
 D.C. power connector J3 is a four-pin AMP Mate-N-Lok connector, P/N
 1-480426-0. The recommended mating connector, P3, is AMP P/N
 1-480424-0, utilizing AMP pins P/N 60619-4. J3 pins are labeled on
 the J3 connector. J3 cabling must be 18 AWG minimum.


 Interface Line Descriptions
 ---------------------------
 The interface for the TM362 and TM262 drives is avilable in one
 configuration. It is compatible with ST506/412 indutry standard
 drives. Compatibility is defined as using the same pin assignment
 where the signal and function are common.

 The interface may be connected in the radial or daisy chain
 configuration.



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                      F   E   A   T   U   R   E  S
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TANDON   TM362/TM262  PRODUCT SPECIFICATION AND USER'S MANUAL 1985

 Introduction
 ------------
 This manual provides useful information to assist the customer when
 incorporating the Tandon rigid disk drive into a system.

 The TM362 and TM262 disk drives are full feature, compact units that
 use a pseudo-closed-loop head positioning system in conjunction with
 standard Winchester technology to store data on 3.5-inch plated
 media. Voltage and signal requirements for both drives are identical
 to those of Tandon Corporation's standard 5-1/4-inch family of rigid
 disk drives.

 Frame size is the only difference between the TM362 drive and the
 TM262 drive. The TM362 is designed to fit in a standard 3.5-inch
 cavity, and the TM262 is designed to fit in a standard 5-1/4-inch
 drive cavity.

 The storage media is contained within the drive in a fixed, non-
 operator-removable configuration.


 Purpose of the Drive
 --------------------
 These drives are rotating disk memory devices designed for random
 access data storage and retrieval. Typical applications include word
 processing systems, entry level microprocessor systems, intelligent
 calculators, program storage, small business computer systems, and
 any application in which low cost, high speed random access data
 storage is required.


 Microprocessor Control
 ----------------------
 The TM362 and TM262 drives feature an onboard microprocessor,
 providing five major functions:

 1. Self-calibration on power-up.
 2. Seek timing for the head positioning mechanism.
 3. Write current switching for optimal data recording quality.
 4. Power and track fault detection.
 5. Compensation for positioning errors caused by temperature and
    mechanical variations.


 Functional Description
 ----------------------
 The functional characteristics of the TM362 and TM262 drives are
 identical. The drives are fully self-contained and require no
 operator intervention during normal operation. During the power-up
 sequence, the spindle motor reaches 3,568 RPM, and the positioning
 mechanism recalibrates the recording heads back to Track 0. If the
 spindle motor does not up to speed within 15 seconds, the drivers to
 the spindle motor will be turned off. A new power up sequence will be
 attempted when the power is momentarily removed and then restored.

 The drives are designed to optimize MFM write and read data recording
 methods, as specified by the ST506/412 interface. Data recovery
 electronics include a low-level read amplifier, differentiator, a
 zero-crossover detector, and digitizing circuits. No data encoding
 or decoding features are provided on the drives.

 The heads are positioned over the desired track by means of a stepper
 motor and a rack and pinion mechanism. Servo positioning pulses are
 recorded on the final segment of each Head 0 track, and, by
 continuously monitoring the location of the heads in relationship to
 those pulses, the drive is able to maintain highly accurate servo
 positioning.

 The onboard microprocessor monitors all functions that could affect
 drive performance. If a problem exists, the drive will abort its
 power sequence or (after achieving a Ready state) declare a fault
 condition.

 A parking zone is provided for the read/write heads at cylinder 663.
 The parking function is under the control of the drive controller.


 Seek Time
 ---------
       +----------------------------------+--------+
       |                                  |362/262 |
       +----------------------------------+--------+
       |Track-to-Track         msec. typ. |   3    |
       +----------------------------------+--------+
       |Average                msec. typ. |  80    |
       |                       msec. max. | 195    |
       +----------------------------------+--------+
       |Head Settling Time     msec.      |  15.0  |
       +----------------------------------+--------+
       |Latency                msec. avg. |   8.41 |
       +----------------------------------+--------+


 Power Sequencing
 ----------------
 No power sequencing is required. The microprocessor starts the
 spindle motor when both voltages are present.


 Soft and Hard Read Error Rates, Exclusive of Media Defects
 ----------------------------------------------------------
 For data that has been verified previously as error free, and when
 used in conjunction with a data separator and phase lock loop of good
 design, the recoverable (soft) error rate for any subsequent read
 operation shall not exceed one error in 1 x 10(10) bits transferred.
 A recoverable read error is an error that may be corrected within
 five attempts to reread the data.

 The nonrecoverable (hard) read error rates shall not exceed one error
 in 1 x 10(12) bits transferred. A nonrecoverable read error is an
 error that may not be corrected within five attempty to reread data,
 providing that the writing of the data previously has been verified
 as correct. The seek error rate is not exceed one error in 1 x 10(6)
 seeks.


 Media Defects
 -------------
 Any defects on the media surface will be identified on a defect map
 provided with each drive. This defect map will indicate the head
 number, track number, and the number of bytes from index for each
 defect. Each defect shall be no longer than 16 bits. Cylinders 000
 and 001 are guranteed error free.

 The defect map is offered as a guide only. The number of defects and
 their locations can change due to customer system variations, such
 as data separators.

 NOTE
 A parking track is located at cylinder 663, to reduce the probability
 of damage to data tracks during extreme shock conditions.


 Mean Time Between Failures            15,000 power on hours
 Mean Time To Repair                   30 minutes
 Component Design Life                 5 years
 Preventative Maintenance              Not Required


 Dust Cover
 ----------
 The design of an enclosure should incorporate a means to prevent
 contamination from loose items (e.g. dust, lint, and paper chad)
 since the drive does not have a dust cover.


 Write precompensation
 ---------------------
 Tandon does not recommended write precompensation.


