FD235HFA/b Specifications

 

The following table provides a description of the hardware specifications for the 3.5" 1.44MB floppy disk drive models FD235HFAxxx and the FD235HFBxxx.
 

Model Name:

A/B-429

A/B-240

A/B-291

A107

A110

Status:

B Current
A Discontinued

B Current
A
Discontinued

B Current
A
Discontinued

Discontinued

Discontinued

Front Bezel:

Black

Dark beige (AT)

Light beige (PS2)

Black

Pearl white

Eject Button:

Black

Dark beige (AT)

Light beige (PS2)

Black

Pearl white

LED Indicator:

Green

Interface Connector:

34-pin connector right-angled header connector

Operation Mode Write / Read:

2MB mode

1MB mode

Disk Used
(90mm / 3.5"):

High density (2HD)

Normal density (2DD)

Data Transfer Rate:

500KBps

250KBps

Unformatted Data Capacity:

2MB

1MB

Rotational Speed:

300rpm

Track Density:

5.3 track/mm (135tpi)

Track to Track Time:

3ms

Required Power:

+5V single (4.5V ~ 5.5V)

Signal Output Driver:

Open Collector TTL

Input signal Pull-up:

1K Ohm ±30%

Function Setting at Delivery:

Interface Setting:

  1. Pin12: Drive Select 1 input

  2. Pin34: Disk Change Output

Other Function Setting:

  1. Automatic density setting for 2DD (1MB) disk or 2HD (2MB) disk

  2. LED Turn-on Condition: DRIVE SELECT

  3. Motor Rotating Condition: MOTOR ON

  4. Ready and seek-complete gate (full-mask) for INDEX and READ DATA output pulses

  5. Auto-chucking at disk installation

  6. Auto-recalibration at power on

  7. Frame is electrically shorted to DC 0V

Dimensions:

101.6 W X 25.4 H X 145 D mm excluding front bezel

Weight:

345g

Mounting:

Vertical/horizontal with spindle motor down

MTBF:

30,000 POH

Safety Standards:

UL, CSA, TUV