SN75LBC970A

SN75LBC970A SCSI DIFFERENTIAL CONVERTER-CONTROL SLLS215B – MAY 1995 – REVISED JANUARY 1999 D Provides Differential SCSI from Single- Ended Controller When Used With the DL PACKAGE (TOP VIEW) SN75LBC971A Data Transceiver D Designed to Operate at Fast-SCSI Speeds of 10 Million Data Transfers per Second D Nine Transceivers Meet or Exceed the Requirements of ANSI Standard EIA-485 and ISO-8482 Standards D Packaged in Shrink Small-Outline Package with 25 mil Terminal Pitch D Low Disabled Supply Current 22 mA Typ D Thermal Shutdown Protection D Positive- and Negative-Current Limiting D Power-Up/-Down Glitch Protection RSTFLTR RESET DSENS CLK40 GND AATN – TEST AACK – TIMEOUT AREQ – AC/D – VCC GND GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 56 X2 55 X1/CLK20 54 NC 53 BATN – 52 BATN+ 51 BACK – 50 BACK+ 49 BREQ – 48 BREQ+ 47 BC/D – 46 BC/D+ 45 VCC 44 GND 43 GND description The SN75LBC970A SCSI differential convertercontrol is an adaptation of the industry’s first 9-channel RS-485 transceiver, the SN75LBC976. When used in conjunction with one or more of its companion data transceiver(s), SN75LBC971A, the chip set provides the superior electrical performance of differential SCSI from a single-ended SCSI bus controller. A 16-bit, Fast-SCSI bus can be implemented with just three devices (two for data and one for control) in the space-efficient, 56-pin, shrink small-outline package (SSOP) and a few external components. GND GND GND VCC DRVBUS SDB AMSG – AI/O – ASEL– NC ABSY – NC ARST – NC ...