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Description
Electronic Component Model:UPD74HC4040CThe uPD765A/B is an LSI floppy disk controller (FDC) chip which contains the circuitry and control functions for interfacing a processor to 4 floppy disk drives. It is capableof either IBM 3740 single density format (FM), or IBM System 34 double density format (MFM) including double-sided recording. The uPD765A/B provides control signals which simplify the design of an external phase-locked loop and write precompensation circuitry. The FDC simplifies and handles most of the burdens associated with implementing a floppy disk interface.
Specifications and features
Address mark detection circuitry is internal to the FDC which simplifies the phase-locked loop and read electronics. The track stepping rate, head load time, and head unload time are user-programmable. The uPD765A/uPD765B offers additional features such as multi-track and multi-side read and write commands and single and double density capabilities.
FM, MFM Control
Variable recording length: 128,256, .8192 bytes/ sector
IBM-compatible format (single- and double sided, single- and double-density)
Multi-sector and multi-track transfer capability
Drive up to 4 floppy or micro floppydisk drives
Data scan capability-will scan a single sector or an entire cylinder comparing byte-for-byte host memory and disk data
Data transfers in DMA or non-DMA mode
Parallel seek operations on up to four drives
Compatible with uPD8080/85, uPD8086/88, V-series and uPD780 ([email protected]) microprocessors
Single-phase clock: 8 MHz maximum 3 +5V onlyApplication Scenarios
This electronic component is commonly used in devices that require floppy disk interfaces, such as old computers and legacy systems.
Comparison
This model of electronic component provides a range of features and capabilities, including IBM-compatible format, multi-sector and multi-track transfer capability, and the ability to drive up to 4 floppy or micro floppydisk drives. However, it is only compatible with specific microprocessors and operates on a single-phase clock with a maximum of 8 MHz.
Advantages- Simplifies the design of an external phase-locked loop and write precompensation circuitry
- Handles most of the burdens associated with implementing a floppy disk interface
- Offers additional features such as multi-track and multi-side read and write commands
- Provides data scan capability and parallel seek operations on up to four drives
Disadvantages- Only compatible with specific microprocessors
- Operates on a single-phase clock with a maximum of 8 MHz
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Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
Shipping fee:
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Shipping option:
DHL, FedEx, EMS, SF Express, and Registered Air MailShipping tracking:
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Popular parts of the same kind
- Datasheet: Download UPD74HC4040C
- Chipdatas Part: CD94-UPD74HC4040C
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/03 07:56 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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