DS2109S/T&R Maxim Integrated Products, DS2109S/T&R Datasheet - Page 2
![IC TERM SCSI PLUG/PLAY 28-SOIC](/photos/6/58/65865/406-28-soic_sml.jpg)
DS2109S/T&R
Manufacturer Part Number
DS2109S/T&R
Description
IC TERM SCSI PLUG/PLAY 28-SOIC
Manufacturer
Maxim Integrated Products
Type
SCSIr
Datasheet
1.DS2109S.pdf
(10 pages)
Specifications of DS2109S/T&R
Number Of Terminations
18
Voltage - Supply
4 V ~ 5.25 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DS2109S/T&RDS2109S/TR
Manufacturer:
SPANSION
Quantity:
10 902
REFERENCE DOCUMENTS
SCSI–2 (X3.131–1994)
SCSI–3 Parallel Interface (X3T10/855D)
Available from: Global Engineering Documents
15 Inverness Way East
Englewood, CO 80112–5704
Phone: (800) 854–7179,(303) 792–2181
Fax: (303) 792–2192
PnP SCSI Specification
PnP ISA Specification
PnP BIOS Specification
PnP Option ROM Specification
Available from: Plug and Play forum on
CompuServe (Go plugplay).
DS2109 APPLICATION ENVIRONMENT Figure 1
DS2109
022698 2/10
PERIPHERAL
EXIT–POINT TERMINATOR
DEVICES
DS2109 AUTOMATIC
SCSI
PROTOCOL CHIP
HOST SCSI
PERIPHERAL
HIGH DENSITY
CONNECTORS
SUBSYSTEM
50–POSITION
(TWO DS21S07A)
TERMINATOR
EXTERNAL
FUNCTIONAL DESCRIPTION
The DS2109 is designed to be a single chip termination
subsystem for use in PnP SCSI systems, Figure 1.
When embedded on a host bus adapter or mother-
board, the DS2109 can automatically sense the ter-
mination status of the SCSI bus and attach or isolate its
resistors as needed to maintain proper bus termination.
External and internal active termination can be provided
by the DS21S07A.
SCSI EXTERNAL
(TWO DS21S07A)
SCSI INTERNAL
TERMINATOR
CABLE
INTERNAL
CABLES