DS2107A中文资料DALLAS数据手册PDF规格书

DESCRIPTION

The SCSI-2 standard recommends the use of active terminations at both ends of every cable segment in a SCSI system with single-ended drivers and receivers. The DS2107A SCSI Terminator, which is fully compliant with the standard, enables the designer to gain the benefits of active termination: greater immunity to voltage drops on the TERMPWR (TERMination PoWeR) line, enhanced high-level noise immunity, intrinsic TERMPWR decoupling, and very low quiescent current consumption. The DS2107A integrates a regulator and nine precise switched 110 ohm termination resistors into a monolithic IC.

FEATURES

• Fully compliant with SCSI and SCSI-2 standards

• Backward compatible to the DS2107S

• Provides active termination for 9 signal lines

• Laser-trimmed 110 ohm termination resistors have 1 tolerance

• Low dropout voltage

• Power-down mode isolates termination resistors from the bus

• Handles actively negated SCSI signals

• Onboard thermal shutdown circuitry

• 16-pin plastic SOIC (DS2107AS) and 20-pin plastic thin SSOP (DS2107AE)