DS2117M Maxim Integrated Products, DS2117M Datasheet
DS2117M
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DS2117M Summary of contents
Page 1
... SE backward compatibility with legacy devices. If the device is connected in an LVD-only bus, the DS2117M will use LVD termination. If any SE devices are connected to the bus, the DS2117M will use SE termination. This is accomplished automatically inside the part by sensing the voltage on the SCSI bus DIFFSENS line. ...
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... The terminating resistors maintain their 110 =value. HVD Isolation Mode The DS2117M identifies that there is an HVD (high voltage differential) device on the SCSI bus and isolates the termination pins from the bus. ...
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... DIFFSENS control line, thereby eliminating erroneous switching between modes. This filter eliminates the need for the external capacitor and resistor, which heretofore performed this function. The external filter may be used in addition to the digital filter if the DS2117M and DS2118M are to be used interchangeably. ...
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... DS2117M BLOCK DIAGRAM Figure DS2117M ...
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... SCSI BUS CONFIGURATION Figure DS2117M ...
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... Signal Termination. Connect to SCSI bus signal lines. Heat Sink Ground. Internally connected to the mounting pad. Should be grounded. Isolation. When pulled high, the DS2117M isolates its bus pins (RxP, RxN) from the SCSI bus. Ground. Signal ground; 0.0 volts. Master/slave. Mode select for the non-controlling terminator. When pulled high (MSTR), the DIFFSENSE driver is enabled. DIFFSENSE CAPACITOR. Connect 0.1 µ ...
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... I 5 dsh I 20 dsl TYP MAX UNITS 110 115.5 Ohms 3.0 Volts 25 TYP MAX UNITS 110 Ohms 190 Ohms 125 mV 1.375 V TYP MAX UNITS 12 mA µA 1.0 µ 0 tpwr V + 0.3 1 200 µA 150 ºC DS2117M NOTES NOTES 4 NOTES 10 ...
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... All lines open 2.4 volts. OUT 0.4 volts. OUT 7. SE/LVD/HVD pins only. 8. MSTR/SLV = 0-5 mA 0.0 volts. dso 11 2.75 volts. dso 12. TPWR = 5.5V SYMBOL MIN LI REG LO REG I LIM I 200 SINK TYP MAX UNITS 1.0 2.5 % 1.3 3.5 % 550 mA mA DS2117M NOTES ...
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... DS2117M 36-PIN SSOP PACKAGE DIM MIN MAX A 2.44 2. 0.29 0.43 c 0.23 0.32 D 15.20 15.54 E 10.11 10.52 E1 7.40 7.60 e 0.80 BSC h 0.25 0.71 L 0.51 1.02 CSP option - mechanical drawing Please check the following web location for latest information on our Chip Scale Package (a.k.a " ...