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Home > Cables & Connectors > Internal Cables > EIDE (Enhanced Integrated Drive Electronics) Cable
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This standard hard drive interface cable is equipped with three 40 pin connectors capable of connecting two IDE based hard drives at a limited speed of 40 mbps.

Newer generation hard drives support Ultra Direct Memory Access (UDMA) for ultra fast transfers of data. UDMA devices require specialized IDE cables normally referred to as 80 conductor cables. These are the same types of cables as non UDMA, with the most notable difference being the cable has 80 wires instead of 40.

 
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Cable Pin Assignments:
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Internal PC Cables

External PC Cables

Internal PC Connectors

External PC Connectors
 
Ultra ATA (44 Pin)
Ultra ATA (44 Pin)

Ultra ATA (50 Pin)
Ultra ATA (50 Pin)
Small Computer Systems Interface
SCSI



Serial Advanced Technology Attachment
Serial ATA



ST506




Apple Power
Book Ata


Apple Power
Book SCSI


Novell Procomp External SCSI


Paravision SX-1 External IDE

 
Introduction
This illustration shows what a typical Ultra ATA cable looks like.

High speed newest generaton Ultra ATA 80 wire 40 pin semiconductor cable.

The following illustration details the exact pin assignments for an Ultra-ATA connector.

High speed newest generaton Ultra ATA 80 wire 40 pin semiconductor cable.

The new high-speed UDMA interface allows host computers to send and retrieve data faster removing bottlenecks associated with system performance. The 40-pin, 80-conductor Ultra ATA-133 cable permits higher data transmission rates, reduces crosstalk, and improves signal integrity by providing 40 additional ground lines between the 40-pin IDE signal and the ground lines.

Ultra ATA EIDE ribbon cables are larger than modern cables and as a result which reduces the ventiallation and proper airflow required by systems to reduce the temperature of system components.

This illustration shows the older generation EIDE ribbon cable because it supports only 40 ground wires as compared to the more modern cable which supports 80 ground wires. Ribbon cable with two connectors
 
Specifications:
Creation Year: 1986
Superseded By: Serial ATA (2003)
Cable Capacities: 16, 33, 66, 100, and 133 mbps
Data Width: 16 bits Bandwidth
Maximum Devices Supported: 2 (master/slave)
Protocols Used: Protocol Parallel
Cable Style: 40 or 80 wires ribbon cable.
Hotplugging Support? None
External Interfaces: None
Supported Devices:

LS-120s drives, tape drives, and zip drives.
IDE or EIDE hard disk drives.
CD-ROM or DVD-ROM drives
Solid-state drives.
Floppy drives.

Explanations Of Connectors:
# Purpose
1
ATA IDE 40 Pin
One 40 pin male connector for connecting the cable to the storage device.
2
ATA IDE 40 Pin
One 40 pin female connector for establishing connection from the storage device to the computer's motherboard.
3
ATA IDE 40 Pin
One 40 pin female connector for connecting a secondary hard disk drive. The device connected to this connector must be configured as a slave device to function properly.
4

5

6
7
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Typical Lengths:
Typical lengths of IDE cables are 19, 24, and 36 inches.
 
Advantages and Disadvantages:
Low cost. Slower than newer generation transfer protocols.
Relatively easy to implement. Limit of two IDE devices per channel.
Proven to be reliable. Master and slave configuration makes it more difficult to implement in multi drive systems..
Maintains high compatibility with old and new systems. Reduction in proper airflow due to size of cables.
 
Cable Features:
 
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