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SN75970B2DLR

SN75970B2DLR
Mfr. #:
SN75970B2DLR
Description:
IC DIFF CNVRTR CNTRL SCSI 56SSOP
Lifecycle:
New from this manufacturer.
Datasheet:
SN75970B2DLR Datasheet
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SN75970B2DLR more Information SN75970B2DLR Product Details
Product Attribute
Attribute Value
Tags
SN75970B2DL, SN75970B2, SN75970, SN759, SN75, SN7
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Step1: Vacuum Packaging with PL
Step1:
Vacuum Packaging with PL
Step2: Anti-Static Bag
Step2:
Anti-Static Bag
Step3: Packaging Boxes
Step3:
Packaging Boxes
***ser
SCSI Termination and Transceivers SCSI Differential Converter Control
***i-Key
IC DIFF CNVRTR CNTRL SCSI 56SSOP
***as Instruments
The SN75970B SCSI differential converter-control, when used in conjunction with one or more of its companion data transceiver(s), provides the superior electrical performance of differential SCSI from a single-ended SCSI bus controller. A 16-bit, Fast-SCSI bus can be implemented with just three devices (two for data and one for control) in the space-efficient, 56-pin, shrink small-outline package (SSOP) as well as the even smaller TSSOP and a few external components. The SN75970B is available in a B2 (20 Mxfer) version and a B1 (10 Mxfer) version. In a typical differential SCSI node, the SCSI controller provides the enables for each external RS-485 transceiver. This could require as many as 27 additional terminals for a 16-bit differential bus controller or relegate a 16-bit single-ended controller to only an 8-bit differential bus. Using the standard nine SCSI control signals, the SN75970B control transceiver decodes the state of the bus and enables the SN75971B data transceiver(s) to transmit the single-ended SCSI input signals differentially to the cable or receive the differential cable signals and drive the single-ended outputs to the controller. The single-ended SCSI bus interface consists of CMOS bidirectional inputs and outputs. The drivers are rated at 16 mA of output current. The receiver inputs are pulled high with approximately 4 mA to eliminate the need for external pullup resistors for the open-drain outputs of most single-ended SCSI controllers. The single-ended side of the device is not intended to drive the SCSI bus directly. The differential SCSI bus interface consists of bipolar bidirectional inputs and outputs that meet or exceed the requirements of EIA-485 and ISO 8482-1982/TIA TR30.2 referenced by the American National Standard of Information Systems (ANSI) X3.131-1994 Small Computer System Interface-2 (SCSI-2) and SCSI-3 Fast-20 Parallel Interface (Fast-20) X3.277:1996. The SN75970B is characterized for operation over the temperature range of 0C to 70C. The SN75970B consists of nine RS-485 differential transceivers, nine TTL- or CMOS-level compatible transceivers, a state machine and control logic block, a 20-MHz crystal-controlled oscillator, a timer, a power-up/-down glitch protection circuit, and a thermal-shutdown protection circuit. The single-ended or controller interface is designated as the A side and the differential port is the B side. Since the device uses the SCSI control signals to decode the state of the bus and data flow direction, the terminal assignments must be matched to the corresponding signal on the SCSI bus. The signal name followed by a a minus sign (-) indicates an active-low signal while a plus sign (+) indicates an active-high signal. A reset function, which disables all outputs and clears internal latches, can be accomplished from two external inputs and two internally generated signals. RESET\ (Reset) and DSENS (differential sense) are available to external circuits for a bus reset or to disable all outputs should a single-ended cable be inadvertently connected to a differential connector. The power-up and thermal-shutdown are internally generated signals that have the same effect when the supply voltage is below 3.5 V or the junction temperature exceeds approximately 175C. This data sheet contains descriptions of the SN75970B input and output signals followed by the electrical characteristics. The parameter measurement information is followed by the theory of operation, a state flow chart, and a typical circuit in the application information section.
Part # Description Stock Price
SN75970B2DLR
DISTI # SN75970B2DLR-ND		IC DIFF CNVRTR CNTRL SCSI 56SSOP
RoHS: Compliant
Min Qty: 1000
Container: Tape & Reel (TR)		Limited Supply - Call
    SN75970B2DLRG4
    DISTI # SN75970B2DLRG4-ND    		IC DIFF CNVRTR CNTRL SCSI 56SSOP
    RoHS: Compliant
    Min Qty: 1000
    Container: Tape & Reel (TR)    		Limited Supply - Call
      Image Part # Description
      SN75976A1DGG

      Mfr.#: SN75976A1DGG

      OMO.#: OMO-SN75976A1DGG

      		 RS-485 Interface IC 9-Channel Diff Transceiver
      SN75976A2DGGR

      Mfr.#: SN75976A2DGGR

      OMO.#: OMO-SN75976A2DGGR

      		 RS-485 Interface IC 9-Channel Diff Transceiver
      SN75971B2DGGR

      Mfr.#: SN75971B2DGGR

      OMO.#: OMO-SN75971B2DGGR

      		 SCSI Interface IC SCSI Differential Converter-Data
      SN75971B2DL

      Mfr.#: SN75971B2DL

      OMO.#: OMO-SN75971B2DL

      		 SCSI Interface IC SCSI Differential Converter-Data
      SN75970B1DL

      Mfr.#: SN75970B1DL

      OMO.#: OMO-SN75970B1DL

      		 SCSI Interface IC SCSI Differential Converter Control
      SN75970B2DL

      Mfr.#: SN75970B2DL

      OMO.#: OMO-SN75970B2DL

      		 SCSI Interface IC SCSI Differential Converter Control
      SN75976A1MDGGREP

      Mfr.#: SN75976A1MDGGREP

      OMO.#: OMO-SN75976A1MDGGREP-TEXAS-INSTRUMENTS

      		 RS-485 Interface IC EP 9 Channel Diff Transceive
      SN75976A2DL

      Mfr.#: SN75976A2DL

      OMO.#: OMO-SN75976A2DL-TEXAS-INSTRUMENTS

      		 RS-485 Interface IC 9-Channel Diff Transceive
      SN75970B2DL

      Mfr.#: SN75970B2DL

      OMO.#: OMO-SN75970B2DL-TEXAS-INSTRUMENTS

      		 IC DIFF CNVRTR CNTRL SCSI 56SSOP
      SN75971B1DLRG4

      Mfr.#: SN75971B1DLRG4

      OMO.#: OMO-SN75971B1DLRG4-TEXAS-INSTRUMENTS

      		 IC DIFF CONVRTR DATA SCSI 56SSOP
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      On Order:
      2000
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      Due to semiconductor in short supply from 2021,below price is the Normal price before 2021.please send inquire to confirm.
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