LX5255CPW MICROSEMI, LX5255CPW Datasheet - Page 4

• Manufacturer Part Number: LX5255CPW
• Manufacturer: MICROSEMI
• Type: SCSI Terminationr

Specifications of LX5255CPW

• Number Of Bits: 9
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.25V
• Package Type: TSSOP
• Mounting: Surface Mount
• Pin Count: 24
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

5
Copyright © 2000
Rev. 1.1, 2006-02-27
1+, 2+, 3+, 4+, 5+, 6+, 7+, 8+, 9+
1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9-
TM
P
DIFSENS
IN
DIFFB
V
DISC
GND
N
TERM
DIFSENS
AME
VTERM
DIFFB
DISC
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
13
24
10
11
DISC
I-Limited
Source
10mA
1.3V
Negative signal termination lines for LVD mode.
Positive signal termination lines for LVD mode.
Power supply pin for terminator. Connect to SCSI bus VTERM. Must be
decoupled by one 4.7
absolutely necessary to connect this pin to the decoupling capacitor through a very low
impedance (big traces to PCB). Keeping distances very short from the decoupling
capacitors is somewhat layout dependent and some applications may benefit from high
frequency decoupling with 0.1
Enables/Disables terminator. See Power Down Function Table for logic levels
Terminator ground pin. Connect to ground.
Differential sense pin connected to system DIFFSENS line. Drives the SCSI bus
DIFSENS line to 1.3V.
Used to detect the SCSI bus mode (SE, LVD or HVD). Should be connected to a 4.7uF
capacitor to GND, and a 50KΩ resistor to the DIFFSENS pin (see Figure 2 on page 5).
F U N C T I O N A L P I N D E S C R I P T I O N
1.25V
Figure 1 – LX5255CPW Block Diagram
-
Window
+
Comp.
Integrated Products Division
LVD
SE
B L O C K D I A G R A M
150
HVD
®
Microsemi
POWER
52.5
52.5
LATCH
1.07 mA
1.07 mA
DELAY
MODE
ON
µ
&
F low-ESR capacitor for every three terminator devices. It is
DISC
µ
F capacitors at V
9-Line LVD SCSI Terminator
D
HVD
HVD
LVD
LVD
ESCRIPTION
SE
SE
P
RODUCTION DATA SHEET
TERM
pin.
12
3
2
1 of 9
Lines
GND
LVD(-)
LVD(+)
LX5255
.
Page 4