LTC1519CS Linear Technology, LTC1519CS Datasheet - Page 10
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LTC1519CS
Manufacturer Part Number
LTC1519CS
Description
IC LINE RCVR RS485 QUAD 16-SOIC
Manufacturer
Linear Technology
Type
Line Receiverr
Datasheet
1.LTC1519ISPBF.pdf
(12 pages)
Specifications of LTC1519CS
Number Of Drivers/receivers
0/4
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1519CS
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC1519CS#PBF
Manufacturer:
LTC
Quantity:
386
Part Number:
LTC1519CS#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIO S I FOR ATIO
LTC1518/LTC1519
Figure 9 shows a trace with 100ft category 5 UTP between
an LTC1685 driver and an LTC1518 receiver. Notice that at
the far end of the cable, the signal to the LTC1518 input has
been reduced. Figure 10 shows a 52Mbps square wave.
Output Short-Circuit Protection
The LTC1518/LTC1519 employ voltage sensing short-
circuit protection at the output terminals. For a given input
differential, this circuitry determines what the correct
10
U
U
Figure 9. 20ns Pulse Propagating Down 100ft of Category 5 UTP
Figure 10. 52Mbps Pulse Train Over 100ft of Category 5 UTP
W
2V/DIV
2V/DIV
5V/DIV
1V/DIV
5V/DIV
U
CABLE
DELAY
50ns/DIV
20ns/DIV
output level should be. For example, if the input differential
is 300mV, it expects the output to be a logic high. If the
output is subsequently shorted to a voltage below V
this circuitry shuts off the output devices and turns on a
smaller device in its place. A timeout period of about 50ns
is used in order to maintain normal high frequency opera-
tion, even under heavy capacitive loads (>100mA tran-
sient current into the load).
LTC1518/19 • F09
LTC1518/19 • F10
DRIVER
INPUT
RECEIVER
INPUT
RECEIVER
OUTPUT
RECEIVER
INPUT
RECEIVER
OUTPUT
NOTES:
TOP TRACE: LTC1518 INPUT AT FAR END
BOTTOM TRACE: LTC1518 OUTPUT
NOTES:
TOP TRACE: LTC1685 DRIVER INPUT
MID TRACE: LTC1518 INPUT AT FAR END
BOTTOM TRACE: LTC1518 OUTPUT
OF 100ft CAT 5 UTP
OF 100ft CATAGORY 5 UTP
DD
/2,