DS2119M/T&R Maxim Integrated Products, DS2119M/T&R Datasheet - Page 3

• Manufacturer Part Number: DS2119M/T&R
• Description: IC TERM SCSI LVD/SE ULT3 28TSSOP
• Manufacturer: Maxim Integrated Products
• Type: SCSI, LVD, SEr

Specifications of DS2119M/T&R

• Number Of Terminations: 9
• Voltage - Supply: 4 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

as possible to the DS2119M. The DS2119M should be placed as close as possible to the SCSI connector
to minimize signal and power-trace length, thereby resulting in less input capacitance and reflections,
which can degrade the bus signals.
To maintain the specified regulation, a 4.7µF capacitor is required between the V
ground of each DS2119M. A high frequency cap (0.1µF ceramic recommended) can also be placed on the
V
Figure 2.
NOTES:
1) DIFFSENS. Refers to the SCSI bus signal.
2) DIFFSENSE. Refers to the Dallas Semiconductor pin name and internal circuitry relating the
REF
DIFFSENS driver.
pin in applications that use fast rise/fall time drivers. A typical SCSI bus configuration is shown in
DIFFSENS Noise Filtering: The DS2119M incorporates a digital filter to remove high-frequency
transients on the 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.
3 of 9
REF
pin (VREF) and