What is the Surface Mount ?

having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.

What is the Operating Temperature ?

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

What is the Packaging ?

Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

What is the Part Status ?

Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

What is the Terminal Form ?

Occurring at or forming the end of a series, succession, or the like; closing; concluding.

What is the Terminal Pitch ?

The center distance from one pole to the next.

What is the Max Supply Voltage ?

In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.

What is the Min Supply Voltage ?

The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.

What is the Nominal Supply Current ?

Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

What is the Quiescent Current ?

The quiescent current is defined as the current level in the amplifier when it is producing an output of zero.

What is the Synchronous Rectifier ?

Synchronous rectification is a technique for improving the efficiency of rectification by replacing diodes with actively controlled switches, usually power MOSFETs or power bipolar junction transistors (BJT).

What is the RoHS Status ?

RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

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DS21T07E/T&R/C16

Name: DS21T07E/T&R/C16
Brand: Analog Devices Inc./Maxim Integrated
Price: 1.93 USD
Availability: InStock
Rating: 5 (1 reviews)

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Manufacturer Analog Devices Inc./Maxim Integrated

Manufacturer Product Number DS21T07E/T&R/C16

Description DS21T07 SCSI TERMINATOR

Datasheet DS21T07E/T&R/C16 Datasheet(pdf)

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$1.93

Quantity Quantity Available: 2366

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Analog Devices Inc./Maxim Integrated

Maxim Integrated has amalgamated with Analog Devices, imparting an augmented repertoire of superlative mixed-signal and power governance innovations, fostering clientele triumph across diverse sectors. This amalgamation begets a spectrum of resolutions for surmounting the utmost intricate quandaries, spanning from direct current to the expanse of 100 gigahertz, encompassing miniscule nanowatt realms to robust kilowatt domains, spanning the sensor continuum to the ethereal expanse of cloud. Delve deeper into Analog Devices' enriched assemblage on their product dossier.

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DS21T07E/T&R/C16 FEATURES

• Fully compliant with SCSI–1, Fast SCSI andUltra SCSI
• Backward compatible to the DS2107,DS2107A, and DS21S07
• Provides active termination for nine signallines
• Laser–trimmed 110 ohms terminationresistors have 2% tolerance
• Low dropout voltage regulator
• Power–down mode isolates terminationresistors from the bus
• SCSI bus hot–plug compatible
• Fully supports actively negated SCSI signals
• Onboard thermal shutdown circuitry
• 16–pin plastic SOIC (DS21T07S) and 20–pinplastic TSSOP (Thin Shrink Small OutlinePackage) (DS21T07E)

DS21T07E/T&R/C16 DESCRIPTION

Fast SCSI and Ultra SCSI require the use of active terminations at both ends of every cable segment in aSCSI system with single-ended drivers and receivers. The DS21T07 SCSI Terminator, which is fullycompliant with these standards, enables the designer to gain the benefits of active termination: greaterimmunity to voltage drops on the TERMPWR (TERMination PoWeR) line, enhanced high-level noiseimmunity, intrinsic TERMPWR decoupling, and very low quiescent current consumption. The DS21T07integrates a regulator and nine precise switched 110 ohms termination resistors into a monolithic IC. TheDS21T07 can be electrically isolated from the SCSI bus without physical removal from the SCSI device.1 of 7112099

DS21T07E/T&R/C16 FUNCTIONAL DESCRIPTION

The DS21T07 consists of a bandgap reference, buffer amplifier, and nine termination resistors (Figure 1).The bandgap reference circuit produces a precise 2.55V level which is fed to a buffer amplifier. Thebuffer produces a 2.85V level and is capable of sourcing at least 24 mA into each of the terminationresistors when the signal line is low (active). When the driver for a given signal line turns off, theterminator will pull the signal line to 2.85V (quiescent state). To handle actively negated SCSI signals,the buffer can sink at least 200 mA, and VREF will move less than 60 mV. When all lines settle in thequiescent state, the regulator will consume about 5 mA. When the DS21T07 is put into power-downmode by bringing PD low, the power-down circuitry will turn off the transistors on each signal line. Thiswill isolate the DS21T07 from the signal lines and effectively remove it from the circuit. The power-down pin ( PD ) has an internal 50KΩ=pullup resistor. To place the DS21T07 into an active state, the PDpin should be left open circuited. When installed on disk drives or RAID system components, theDS21T07 will not affect the SCSI bus during a hot plug operation.To ensure proper operation, both the TERMPWR1 and TERMPWR2 pins must be connected to the SCSIbus TERMPWR line and both the VREF1 and VREF2 pins must be tied together externally. EachDS21T07 requires a 4.7 µF capacitor connected between the VREF pins and ground. Figure 2 details atypical SCSI bus configuration. In an 8-bit wide SCSI bus arrangement, two DS21T07’s would be neededat each end of the SCSI cable in order to terminate the 18 active signal lines. In a 16-bit wide SCSI busarrangement, three DS21T07’s would be needed at each end of the SCSI cable in order to terminate the27 active signal lines.

DS21T07E/T&R/C16 applications using fast rise/fall time drivers.

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Q: What is the process for returns or replacements of DS21T07E/T&R/C16?
A: We conduct a Pre-Shipment Inspection (PSI) on randomly selected batches from your order to ensure quality before shipment. We will accept returns or replacements of the DS21T07E/T&R/C16 if it does not meet your expectations under the following conditions:
Issues such as incorrect quantities, delivery of wrong items, or obvious external defects are acknowledged by us.
We are informed about the defects within 90 days from the delivery date.
The DS21T07E/T&R/C16 remains unused and in its original packaging.
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Inform us within the 90-day period.
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Product Attributes

TYPE	DESCRIPTION	Select all
Package	Bulk
Series	-
Supplier Device Package	20-TSSOP
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 70°C
Voltage - Supply	4V ~ 5.5V
Number of Terminations	9
Type	SCSI, LVD, SE
Product Status	Active