DS2125 데이터 시트보기 (PDF) - Maxim Integrated
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DS2125 Datasheet PDF : 7 Pages
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DS2125 Ultra3 LVD/SE SCSI 15-Line Terminator
ABSOLUTE MAXIMUM RATINGS
VREF, ISO, GND, DIFFSENSE, DIFF_CAP, TPWR, RxP, RxN (x = 1 . . . 15)………………………………-0.3V, +6.0V
VREF Continuous Output Current………………………………………………………………………………………±200mA
Continuous Power Dissipation (TA = +70°C), 48-Pin LQFP……………………………………………………………...2W
Operating Temperature Range………………………………………………………………………………….0°C to +70°C
Junction Temperature…………………………………………………………………………………………………...+150°C
Storage Temperature Range………………………………………………………………………………...-65°C to +160°C
Lead Temperature (soldering, 10s)…………………………………………………………………………………….+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(TPWR = 3.3V, TA = 0°C to +70°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TPWR Operating Supply
Range
VTPWR
LVD
SE
TPWR SUPPLY CURRENT
TPWR Supply Current
(All Lines Open)
ITPWR_LVD
ITPWR_SE
ITPWR_ISO
LVD SCSI mode
SE SCSI mode
ISO mode (terminators disabled)
LVD TERMINATION (Applies to each line pair, 1 to 15 in LVD mode)
Differential-Mode
Termination Resistance
RDM
Common-Mode
Termination Resistance
RCM
RP and RN shorted together
Differential-Mode Bias
VDM
All lines open
Common-Mode Bias
VCM
RP and RN shorted together
SE TERMINATION (Applies to SE terminators, 1 to 15 in SE mode)
Single-Ended Mode
Termination Resistance
RSE = (VLx - 0.2) / ILx,
where VLx = voltage at terminator
RSE
pin with pin unloaded and
ILx = current for each terminator pin
with the pin forced to 0.2V (Note 2)
Termination Current
(Note 2)
ISE
Signal level at 0.2V, all lines low
Signal level at 0.5V
SE Voltage Reference
VREF
(Note 2)
Pin Leakage
With ISO high
Single-Ended GND
Resistance
RGND
TERMINATOR PIN CAPACITANCE
Terminator Pin
Capacitance
CIN
VREF REGULATOR
1.25V Regulator Output
Voltage
VREF_LVD
1.25V Regulator Short-
Circuit Source Current
ISOURCE
1.25V Regulator Short-
Circuit Sink Current
ISINK
1.25V Regulator Line
Regulation
2.85V Regulator
2.85V Regulator Short-
Circuit Source Current
2.85V Regulator Short-
Circuit Sink Current
Measured at RP pins, I = 10mA
With ISO high (Note 1)
VREF = 0V
VREF = 3.3V
VREF unloaded; vary TPWR from
2.7V to 5.5V
(Note 2)
VREF = 0V (Note 2)
VREF = 3.3V (Note 2)
MIN
2.7
4.0
100
110
100
1.15
104.5
-21.0
-18.0
2.7
1.15
-375
170
2.7
-375
170
TYP
MAX UNITS
5.5
5.5
V
20
32
mA
1.6
10
mA
250
750
µA
110
Ω
165
Ω
125
mV
1.25
1.35
V
110
115.5
Ω
-24
-25.4
-22.4
mA
2.85
3.0
V
400
nA
20
60
Ω
3
pF
1.25
1.35
V
-700
-1000
mA
300
700
mA
1.0
2.5
%
2.85
3.0
V
-700
-1000
mA
300
700
mA
2 of 7
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