Datenblatt-pdf.com


DS36954 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer DS36954
Beschreibung Quad Differential Bus Transceiver
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 10 Seiten
DS36954 Datasheet, Funktion
July 1998
DS36954
Quad Differential Bus Transceiver
General Description
The DS36954 is a low power, quad EIA-485 differential bus
transceiver especially suited for high speed, parallel, multi-
point, I/O bus applications. A compact 20-pin surface mount
PLCC or SOIC package provides high transceiver integra-
tion and a very small PC board footprint.
Propagation delay skew between devices is specified to aid
in parallel interface designs — limits on maximum and mini-
mum delay times are guaranteed.
Five devices can implement a complete SCSI initiator or tar-
get interface. Three transceivers in a package are pinned out
for data bus connections. The fourth transceiver, with the
flexibility provided by its individual enables, can serve as a
control bus transceiver.
Features
n Pinout for SCSI interface
n Compact 20-pin PLCC or SOIC package
n Meets EIA-485 standard for multipoint bus transmission
n Greater than 60 mA source/sink currents
n Thermal shutdown protection
n Glitch-free driver outputs on power up and down
Connection Diagrams
Logic Diagrams
DS011014-1
Order Number DS36954V
See NS Package Number V20A
DS011014-19
Order Number DS36954M
See NS Package Number M20B
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS011014
DS011014-2
www.national.com






DS36954 Datasheet, Funktion
Parameter Measurement Information (Continued)
S1 1.5V
S2 Open
S3 Closed
S1 1.5V
S2 Closed
C3 Closed
DS011014-13
DS011014-14
S1 −1.5V
S2 Closed
C3 Open
DS011014-15
DS011014-16
S1 −1.5V
S2 Closed
C3 Closed
FIGURE 8. Receiver Enable and Disable Timing
DS011014-17
DS011014-18
Tra, Trb, Tfa and Tfb are propagation delay measurements to the 20% and 80% levels.
TCP = Crossing Point
FIGURE 9. Propagation Delay Timing for Calculations of Driver Differential Propagation Delays
Note 12: The input pulse is supplied by a generator having the following characteristics: f = 1.0 MHz, 50% duty cycle, trand tf < 6.0 ns, ZO = 50.
Note 13: CL includes probe and stray capacitance.
Note 14: Diodes are 1N916 or equivalent.
Note 15: Differential propagation delays are calculated from single-ended propagation delays measured from driver input to the 20% and 80% levels on the driver
outputs (Figure 9) .
www.national.com
6

6 Page







SeitenGesamt 10 Seiten
PDF Download[ DS36954 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
DS3695Multipoint RS485/RS422 Transceivers/RepeatersNational Semiconductor
National Semiconductor
DS3695DS3695/DS3695T/DS3696/DS3697 Multipoint RS485/RS422 Transceivers/Repeaters (Rev. C)Texas Instruments
Texas Instruments
DS36950Quad Differential Bus TransceiverNational Semiconductor
National Semiconductor
DS36950DS36950 Quad Differential Bus Transceiver (Rev. C)Texas Instruments
Texas Instruments
DS36954Quad Differential Bus TransceiverNational Semiconductor
National Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche