DS2125+ Maxim Integrated, DS2125+ Datasheet - Page 3

• Manufacturer Part Number: DS2125+
• Description: SCSI Interface IC
• Manufacturer: Maxim Integrated
• Series: DS2125r
• Type: SCSI Terminationr

Specifications of DS2125+

• Rohs: yes
• Operating Supply Voltage: 2.7 V to 5.5 V
• Supply Current: 32 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Resistance: 110 Ohms
• Part # Aliases: 90-21250+000

ELECTRICAL CHARACTERISTICS (continued)
(TPWR = 3.3V, T
Note 1: Guaranteed by design.
Note 2: TPWR = 4.0V.
Note 3: Room temperature only.
PIN DESCRIPTION
V
2.85V Regulator Line
Regulation
DIFFSENS OUTPUT
DIFFSENS Driver Output
Voltage
DIFFSENS Driver Source
Current
DIFFSENS Driver Sink
Current
DIFFSENS Leakage
(Note 3)
THERMAL SHUTDOWN
Thermal-Shutdown
Threshold
Thermal-Shutdown
Hysteresis
MODE CHANGE DELAY/FILTER
Mode Change Delay
LOGICAL SIGNALS (ISO)
Input Low Voltage
Input High Voltage
Input Current
DIFF_CAP
Input Current
DIFF_CAP SE
Operating Range
DIFF_CAP LVD
Operating Range
DIFF_CAP HVD
Operating Range
1, 2, 11–26,
4–9, 28–33
REF
37–48
PIN
10
27
34
35
36
REGULATOR
3
PARAMETER
DIFFSENSE
DIFF_CAP
RxP, RxN
HS_GND
A
NAME
TPWR
GND
V
ISO
= 0°C to +70°C, unless otherwise noted.)
REF
SYMBOL
I
I
LEAK, HIGH
Signal Termination. Connect to SCSI bus signal lines.
Termination Power. Connect to the SCSI TERMPWR line and decouple with a 2.2µF
capacitor.
Heat-Sink Ground. Internally connected to the mounting pad. This should be grounded.
Reference Voltage. 2.85V reference in SE mode and 1.25V reference in LVD mode; must be
decoupled with a 4.7µF capacitor.
Ground. Signal ground, 0V.
DIFFSENSE Capacitor. Connect a 0.1µF capacitor for the DIFFSENSE filter. Input to detect
the type of device (differential or single-ended) on the SCSI bus.
DIFFSENSE. Output to drive the SCSI bus DIFFSENS line.
Isolation. When pulled high, the DS2125 isolates its bus pins (RxN, RxP) from the SCSI bus.
LEAK, LOW
V
V
V
t
V
DELAY
I
LVDOR
HVDOR
I
V
DSH
V
SEOR
DSL
DSO
I
I
IL
IH
L
IL
V
4.0V to 5.5V
V
V
With ISO high, |V
With ISO high, |V
0.3V
For increasing temperature
(Note 1)
(Note 1)
V
V
-5mA ≤ I
REF
DIFFSENS
DIFFSENS
CC
IL
= -0.3V
= 3.3V
unloaded; vary TPWR from
DFFSENS
= 0V
= 3.3V
CONDITIONS
3 of 7
≤ 50µA
DIFFSENS
DIFFSENS
| = 0.3V
- V
TPWR
FUNCTION
| =
0.66
MIN
-0.3
-0.3
100
-30
1.2
-15
0.7
2.4
-3
-1
1
2
TYP
1.25
150
-10
1.0
10
V
TPWR
MAX
+ 0.3
TPWR
+0.8
+0.5
2.00
200
2.5
1.4
1.9
0.3
+1
+1
-5
3
+
UNITS
mA
ms
µA
µA
µA
µA
°C
°C
%
V
V
V
V
V
V