SN75971B

SN75971B SCSI DIFFERENTIAL CONVERTER-DATA SLLS322A – NOVEMBER 1999 – REVISED JANUARY 2000 D Provides High-Voltage Differential SCSI From Single-Ended Controller When Used DGG OR DL PACKAGE (TOP VIEW) With the SN75970B Control Transceiver D Meets or Exceeds the Requirements of EIA Standard RS-485 and ISO-8482 Standards D ESD Protection on Bus Pins to 12 kV D Packaged in Shrink Small-Outline Package with 25 mil Terminal Pitch and Thin Small-Package with 20 mil Terminal Pitch D Low Disabled-Supply Current 32 mA Typ D Thermal Shutdown Protection D Positive- and Negative-Current Limiting D Power-Up/-Down Glitch Protection D Open-Circuit Failsafe Receivers SDB 1 DRVBUS 2 GND 3 ADBP – 4 NC 5 ADB7 – 6 NC 7 ADB6 – 8 NC 9 ADB5 – 10 NC 11 VCC 12 GND 13 56 DSENS 55 RESET 54 GND 53 BDBP – 52 BDBP + 51 BDB7 – 50 BDB7 + 49 BDB6 – 48 BDB6 + 47 BDB5 – 46 BDB5 + 45 VCC 44 GND description GND 14 GND 15 43 GND 42 GND The SN75971B SCSI differential converter-data is a 9-channel RS-485 transceiver. When used in conjunction with its companion control transceiver, the SN75970B, the resulting chip set provides the superior electrical performance of differential SCSI from a single-ended SCSI bus or controller. A 16-bit Ultra-SCSI (or Fast-20) SCSI bus can be implemented GND 16 GND 17 VCC 18 ABD4 – 19 NC 20 ADB3 – 21 NC 22 41 GND 40 GND 39 VCC 38 BDB4 – 37 BDB4 + 36 BDB3 – 35 BDB3 + with just three devices (two data and one control) in the ADB2 – 23 34 BDB2 – space efficient, 56-pin, shr...