DS36954V National Semiconductor, DS36954V Datasheet

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DS36954V

Manufacturer Part Number
DS36954V
Description
IC TRANSCEIVER QUAD DIFF 20-PLCC
Manufacturer
National Semiconductor
Type
Transceiverr
Datasheet

Specifications of DS36954V

Number Of Drivers/receivers
4/4
Protocol
RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
20-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*DS36954V

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© 2004 National Semiconductor Corporation
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
target interface. Three transceivers in a package are pinned
Connection Diagrams
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
See NS Package Number M20B
See NS Package Number V20A
Order Number DS36954M
Order Number DS36954V
DS011014
01101419
01101401
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
Logic Diagram
01101402
www.national.com
July 1998

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DS36954V Summary of contents

Page 1

... Five devices can implement a complete SCSI initiator or target interface. Three transceivers in a package are pinned Connection Diagrams Order Number DS36954V See NS Package Number V20A Order Number DS36954M See NS Package Number M20B TRI-STATE ® ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Control Input Voltage Driver Input Voltage Driver Output Voltage/ Receiver Input Voltage Receiver Output Voltage @ Continuous Power Dissipation +25˚C ...

Page 3

Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified Symbol Parameter DRIVER AND RECEIVER CHARACTERISTICS V Enable Input Voltage High IH V Enable Input Voltage Low IL V Enable Input Clamp Voltage CL I Line Input Current ...

Page 4

Switching Characteristics Note 3: I and I include driver input current and receiver TRI-STATE leakage current on DR(1–3 Note 4: ∆ IVODI and ∆ IVOCI are changes in magnitude of V Note 5: In EIA Standards EIA-422 and ...

Page 5

Parameter Measurement Information for for FIGURE 5. Driver Enable and Disable Timing ( for for FIGURE ...

Page 6

Parameter Measurement Information S1 1.5V S2 Open S3 Closed S1 −1.5V S2 Closed C3 Open www.national.com (Continued) S1 1.5V S2 Closed C3 Closed 01101413 S1 −1.5V 01101414 S2 Closed C3 Closed 01101415 FIGURE 8. Receiver Enable and Disable Timing 6 ...

Page 7

Parameter Measurement Information and T are propagation delay measurements to the 20% and 80% levels Crossing Point CP FIGURE 9. Propagation Delay Timing for Calculations of Driver Differential Propagation ...

Page 8

... Physical Dimensions unless otherwise noted www.national.com inches (millimeters) Order Number DS36954M NS Package Number M20B Order Number DS36954V NS Package Number V20A 8 ...

Page 9

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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