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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DS21S07AE

Name: DS21S07AE
Brand: Analog Devices Inc./Maxim Integrated
Price: 0.25 USD
Availability: InStock
Rating: 5 (1 reviews)

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Manufacturer Analog Devices Inc./Maxim Integrated

Manufacturer Product Number DS21S07AE

Description IC TERMINATOR SCSI 20-TSSOP

Datasheet DS21S07AE Datasheet(pdf)

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$0.25

Quantity Quantity Available: 2000

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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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DS21S07AE FEATURES

• Fully Compliant with SCSI-1, Fast SCSI, andUltra SCSI
• Backward Compatible to the DS2107 andDS2107A
• Provides Active Termination for Nine SignalLines
• Laser-Trimmed 110Ω Termination ResistorsHave 2% Tolerance
• Low Drop-Out Voltage Regulator
• Power-Down Mode Isolates TerminationResistors from the Bus
• SCSI Bus Hot Plug Compatible
• Fully Supports Actively Negated SCSI Signals
• On-Board Thermal Shutdown Circuitry
• 16-Pin Plastic SO (DS21S07AS) and 20-PinPlastic TSSOP (Thin Shrink Small OutlinePackage) (DS21S07AE)

DS21S07AE GENERAL DESCRIPTION

Fast SCSI and Ultra SCSI require the use of activeterminations at both ends of every cable segment in aSCSI system with single-ended drivers and receivers.The DS21S07A SCSI terminator, which is fullycompliant with these standards, enables the designerto gain the benefits of active termination: greaterimmunity to voltage drops on the TERMPWR(TERMination PoWeR) line, enhanced high-levelnoise immunity, intrinsic TERMPWR decoupling,and very low quiescent current consumption. TheDS21S07A integrates a regulator and nine preciseswitched 110Ωaterminationmonolithic IC. The DS21S07A can be electricallyisolated from the SCSI bus without physical removalfrom the SCSI device.resistorsinto

DS21S07AE FUNCTIONAL DESCRIPTION

The DS21S07A consists of a bandgap reference, buffer amplifier, and nine termination resistors(Figure 1). The bandgap reference circuit produces a precise 2.55V level that is fed to a buffer amplifier.The buffer produces a 2.85V level and can source at least 24mA into each of the termination resistorswhen the signal line is low (active). When the driver for a given signal line turns off, the terminator pullsthe signal line to 2.85V (quiescent state). To handle actively negated SCSI signals, the buffer can sink atleast 200mA, and VREF will move less than 60mV. When all lines settle in the quiescent state, theregulator consumes about 2.5mA. When the DS21S07A is put into power-down mode by bringing PDlow, the power-down circuitry turns off the transistors on each signal line. This isolates the DS21S07Afrom the signal lines and effectively removes it from the circuit. The power-down pin (PD) has an internal50kΩ pullup resistor. To place the DS21S07A into an active state, the PD pin should be left opencircuited. When installed on disk drives or RAID system components, the DS21S07A will not affect theSCSI 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. EachDS21S07A requires a 4.7µF capacitor connected between the VREF pins and ground. Figure 2 details atypical SCSI bus configuration. In an 8-bit-wide SCSI bus arrangement (“A” Cable), two DS21S07A’swould be needed at each end of the SCSI cable to terminate the 18 active signal lines. In a 16-bit-wideSCSI bus arrangement (“P” Cable), three DS21S07A’s would be needed at each end of the SCSI cable toterminate the 27 active signal lines.Figure 1. DS21S087A Block Diagram2 of 8

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Q: What is the process for returns or replacements of DS21S07AE?
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 DS21S07AE 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 DS21S07AE remains unused and in its original packaging.
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Inform us within the 90-day period.
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For more details, refer to our Return & Change Policy.
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Product Attributes

TYPE	DESCRIPTION	Select all
Package	Tube
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	Obsolete