HP7501 Datasheet, PDF (5/9 Pages) List of Unclassifed Manufacturers – Ultra320 LVD/SE SCSI Terminator

HP7501
Ultra320 LVD/SE SCSI Terminator
14
GND
Signal Ground.
15
MST/SLV
Mode select pin. When pull high, master mode will enable the DIFFSEN drive
SCSI bus. The DIFFSENSE driver is off when this pin is connected to ground.
16
DIFFSENSE ^{This signal will drive 1.3V to the SCSI bus during the Master mode in order to}
detect which type of device is connected to the SCSI bus. On power up, the
HP7501 will try to deliver LVD level to the DIFFSENSE line. If only LVD SCSI
devices are on the bus, the DIFFSENSE signal will be successfully driven to
1.3V and the terminator will configure the system for LVD operation. If any SE
device is on the bus, it will present a grounding level to the DIFFSENSE line.
This will indicate HP7501 to configure into SE operation. HP7501 will be in shut
down mode if DIFFSENSE detects a high voltage level.
17
DIF_CAP
This pin should be connected to a 0.1uF capacitor to ground and 20K resistor
to SCSI bus DIFFSENS line for DIFFSEN filter.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Termpower Voltage (SE)
Termpower Voltage (LVD)
Logic 0 (Low)
Logic 1 (High)
SYMBOL
MIN
Vtpwr
4.0
2.7
Vil
-0.3
Vih
2.0
Operating Temperature
Ta
0
TYP
MAX
UNITS NOTES
5.25
V
5.25
V
+0.8
V
Vtpwr+0.3
V
70
℃
DC CHARACTERISTICS
PARAMETER
SYMBOL
MIN
TPWR Current (SE)
Itpwr
TPWR Current (LVD)
Itpwr
Input Leakage Current
Iih
0
High
Input Leakage Current
Iil
Low
Output Current High
Ioh
0
Vout = 2.4 V
Output Current Low
Iol
4.0
Vout = 0.4V
DIFFSEN Output Voltage
Vov
1.2
DIFFSEN Source Current
Isc
DIFFSEN Sink Current
Isi
20
DIFFSEN SE
Vse
-0.3
Voltage Range
DIFFSEN LVD
Vlvd
0.7
Voltage Range
DIFFSEN HVD
Vhvd
2.4
Voltage Range
TYP
MAX
UNITS NOTES
15
mA
*1
25
mA
uA
1.0
uA
mA
mA
1.4
V
5
15
mA
200
uA
0.5
V
1.9
V
Vtpwr+0.3
V
2003/05/12 Ver. 0.0
5
HIMARK TECHNOLOGY INC.