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Part Number: IMP5246
Description: The IMP5245/5246 ICs are Low Voltage Differential (LVD) terminators designed to comply with the LVD te...
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IMP5246
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DataSheet
General Description
IMP5246 General Description
The IMP5245/5246 ICs are Low Voltage Differential (LVD) terminators designed to comply with the LVD termination specification in the SPI-2 document. The IMP5245/5246 are designed specifically for LVD applications.Because the IMP5245/5246 support only LVD, they have lower output capacitance than multimode terminators.
The IMP5245/5246 deliver the ultimate in SCSI bus performance while saving component cost and board area. Elimination of the external capacitors also mitigates the need for a lengthy capacitor selection process. The individual high bandwidth drivers also maximize channel separation and reduces channel-to-channel noise and cross talk. The high-bandwidth architecture insures ULTRA-2 performance, while providing a clear migration path to ULTRA-3 and beyond.
When the IMP5245/5246 are enabled, the differential sense (DIFFSENSE) pin supplies a voltage between 1.2V and 1.4V. The terminator DIFFSENSE output is connected to the system DIFFSENSE line. If there are no single ended or HVD devices attached to the system the LVD output will be enabled. If the DIFFSENSE line is LOW, indicating a single ended device, the IMP5245/5246 output will be in a highimpedance state. If the DIFFSENSE line is HIGH, indicating a high voltage differential device, the IMP5245/5246 output will also be in a high-impedance state.
The IMP5245/5246 ICs have a TTL compatible disconnect pin. The IMP5245 is active LOW and the IMP5246 is active HIGH. During sleep mode, power supply current is reduced to just 5A. During sleep mode all outputs are in a high-impedance state. Also during sleep mode, the DIFFSENSE function is disabled and is placed in a highimpedance state.
IMP5246 Maximum Ratings
TermPwr Voltage . . . . . . . . . . . . . . . . . . . . . . . . +6.5V
Signal Line Voltage . . . . . . . . . . . . . . . . . . . 0V to 6.5V
Differential Voltage . . . . . . . . . . . . . . . . . . . 0V to 6.5V
Operating Junction Temperature
Plastic (PW Package) . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature Range . . . . . 65°C to 150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . 300°C
Note: 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive
into, negative out of the specified terminal.
Signal Line Voltage . . . . . . . . . . . . . . . . . . . 0V to 6.5V
Differential Voltage . . . . . . . . . . . . . . . . . . . 0V to 6.5V
Operating Junction Temperature
Plastic (PW Package) . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature Range . . . . . 65°C to 150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . 300°C
Note: 1. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive
into, negative out of the specified terminal.
IMP5246 Features
` 2.5pF typical disabled output capacitance
` Fast response
` No external VREF capacitors required
` 5A supply current in disconnect mode
` 20mA supply current during normal operation
` Logic command disconnects all termination lines
` Diffsense line driver
` Current limit and thermal protection
` Compatible with the pending SPI-2 LVD specification
` Pin compatible to the UCC5640
` Fast response
` No external VREF capacitors required
` 5A supply current in disconnect mode
` 20mA supply current during normal operation
` Logic command disconnects all termination lines
` Diffsense line driver
` Current limit and thermal protection
` Compatible with the pending SPI-2 LVD specification
` Pin compatible to the UCC5640
IMP5246 Connection Diagram
IMP5246
PDF/DataSheet Download
- Datasheet: IMP5246
- File Size: 120831 KB
- Manufacturer: IMP
- Click here to Download
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IMP5246 Relative Products
IMP5245
The IMP5245/5246 ICs are Low Voltage Differential (LVD) terminators designed to comply with the LVD termination specification in the SPI-2 document. The IMP5245/5246 are designed specifically for LVD applications.Because the IMP5245/5246 support only LVD, th...
IMP5242
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IMP5241
The IMP5241/42 is a multimode SCSI terminator that conforms to the SCSI Parallel Interconnect- 2 (SPI-2) specification developed by the T10 standards committee for low voltage differential (LVD) termination, while providing backwards compatibility to the SCS...
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