SN75LBC971A

SN75LBC971A SCSI DIFFERENTIAL CONVERTER-DATA SLLS186B – OCTOBER 1994 – REVISED JULY 1997 D Provides Differential SCSI From Single-Ended Controller When Used With DL PACKAGE (TOP VIEW) the SN75LBC970A Control Transceiver D Designed to Operate at Fast-SCSI Speed of Ten Million Data Transfers per Second D Meets or Exceeds the Requirements of EIA Standard RS-485 and ISO-8482 Standards D Packaged in Shrink Small-Outline Package With 25-Mil Terminal Pitch D Low Disabled-Supply Current SDB DRVBUS GND ADBP – NC ADB7 – NC ADB6 – 1 2 3 4 5 6 7 8 56 DSENS 55 RESET 54 GND 53 BDBP – 52 BDBP + 51 BDB7 – 50 BDB7 + 49 BDB6 – 23 mA Typ D Thermal Shutdown Protection NC 9 ADB5 – 10 48 BDB6 + 47 BDB5 – D Positive- and Negative-Current Limiting D Power-Up/-Down Glitch Protection NC VCC GND 11 12 13 46 BDB5 + 45 VCC 44 GND description GND 14 GND 15 43 GND 42 GND The SN75LBC971A SCSI differential converter-data is GND 16 41 GND an adaptation of the industry’s first 9-channel RS-485 GND 17 40 GND transceiver, the SN75LBC976. When used in conjunction with its companion control transceiver, the VCC 18 ABD4 – 19 39 VCC 38 BDB4 – SN75LBC970A, the resulting chip set provides the NC 20 37 BDB4 + superior electrical performance of differential SCSI from a single-ended SCSI bus or controller. A 16-bit SCSI bus can be implemented with just three devices (two data and one control) in the space efficient, 56-pin, shrink small-outline package (SSOP) and a few external components. An 8...