DS2118M Maxim Integrated Products, DS2118M Datasheet

IC TERM SCSI LVD/SE ULT-3 36SSOP

DS2118M

Manufacturer Part Number
DS2118M
Description
IC TERM SCSI LVD/SE ULT-3 36SSOP
Manufacturer
Maxim Integrated Products
Type
SCSI, LVD, SEr
Datasheet

Specifications of DS2118M

Number Of Terminations
9
Voltage - Supply
4 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
36-SSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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www.maxim-ic.com
FEATURES
ORDERING INFORMATION
+ Denotes a lead-free/RoHS-compliant package.
* The top mark includes a "+" on lead-free packages.
DS2118MB
DS2118MB+
DS2118MB/T&R
DS2118MB+T&R
Fully Compliant with SCSI SPI-2, SPI-3,
SPI-4, Ultra160, and Ultra320
Provides Multimode Low-Voltage
Differential/Single-Ended (LVD/SE)
Termination for Nine Signal Line Pairs
Autoselection of LVD or SE Termination
5% Tolerance on SE and LVD Termination
Resistance
Low Power-Down Capacitance of 3pF
On-Board Thermal Shutdown Circuitry
SCSI Bus Hot-Plug Compatible
Fully Supports Actively Negated SE SCSI
Signals
PART
VOLTAGE
(V)
5
5
5
5
TEMP RANGE PIN-PACKAGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ultra3 LVD/SE SCSI Terminator
1 of 10
36 SSOP (0.300")
36 SSOP (0.300")
36 SSOP (0.300")/Tape and
Reel
36 SSOP (0.300")/Tape
and Reel
PIN CONFIGURATION
HS GND
HS GND
HS GND
VREF
GND
R2N
R3N
R1N
R2P
R4P
R4N
R5N
R1P
R3P
R5P
ISO
NC
NC
1
10
11
12
13
15
16
17
18
2
3
5
6
7
8
9
14
4
DS2118M
SSOP
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
TOP MARK*
DS2118MB
DS2118MB
DS2118MB
DS2118MB
DS2118M
LVD
SE
R9N
R9P
R8P
R7N
R7P
R6N
R8N
HS GND
HS GND
HS GND
R6P
DIFF_CAP
DIFFSENSE
MSTR/SLV
TPWR
HVD
REV: 010406

Related parts for DS2118M

DS2118M Summary of contents

Page 1

... SSOP (0.300")/Tape 0°C to +70°C and Reel DS2118M 1 36 TPWR HVD DS2118M LVD R9N 31 6 R9P 7 30 R8N 29 8 R8P GND GND GND 25 R7N R7P 23 14 R6N 22 15 R6P 21 DIFF_CAP DIFFSENSE 19 18 MSTR/SLV SSOP TOP MARK* DS2118MB DS2118MB DS2118MB DS2118MB REV: 010406 ...

Page 2

... The multimode operation enables the designer to implement LVD in current products while allowing the end-user SE-backward compatibility with legacy devices. If the device is connected in an LVD-only bus, the DS2118M will use LVD termination. If any SE devices are connected to the bus, the DS2118M will use SE termination. This is accomplished automatically inside the part by sensing the voltage on the SCSI bus DIFFSENS line ...

Page 3

... SCSI bus, V (SE/LVD/HVD) remain active. The DIFFSENSE driver is shut down during either of these two events. An internal pulldown resistor assures that the DS2118M will be terminating the bus if the ISO pin is left floating. To ensure proper operation, the TPWR pin should be connected to the SCSI bus TERMPWR line. As with all analog circuitry, the TERMPWR and V and a 0.01µ ...

Page 4

... A typical SCSI bus configuration is shown in REF Figure 2. NOTES: 1) DIFFSENS. Refers to the SCSI bus signal. 2) DIFFSENSE. Refers to the DS2118M pin name and internal circuitry capable of driving the DIFFSENS line. 3) DIFF_CAP. Refers to the DS2118M pin name and internal circuitry relating to monitoring the DIFFSENS line ...

Page 5

... Figure 1. DS2118M Block Diagram ...

Page 6

Figure 2. SCSI Bus Configuration ...

Page 7

... Signal Termination. Connect to SCSI bus signal lines. Heat Sink Ground. Internally connected to the mounting pad. Should be grounded. Isolation. When pulled high, the DS2118M isolates its bus pins (RxP, FxP) from the SCSI bus. Ground. Signal ground; 0V. Master/Slave. Mode-select for the noncontrolling terminator. When pulled high (MSTR), the DIFFSENSE driver is enabled. DIFFSENSE Capacitor. Connect 0.1µ ...

Page 8

SINGLE-ENDED CHARACTERISTICS PARAMETER SE Termination Resistance SE Voltage Reference SE Output Current Output Capacitance LOW-VOLTAGE DIFFERENTIAL CHARACTERISTICS PARAMETER Differential Mode Termination Resistance Common Mode Termination Resistance Differential Mode Bias Common Mode Bias DC CHARACTERISTICS PARAMETER Termpower Current Input Leakage High ...

Page 9

REGULATOR CHARACTERISTICS PARAMETER Line Regulation Load Regulation Current Limit Sink Current NOTES 3V. LINE 0.2V. LINE 3) Guaranteed by design. 4) All lines open 2.4V. OUT ...

Page 10

... No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation © 2006 Maxim Integrated Products • Printed USA DS2118M ...

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