ltc1518cs-trpbfltc1519cs Linear Technology Corporation, ltc1518cs-trpbfltc1519cs Datasheet

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ltc1518cs-trpbfltc1519cs

Manufacturer Part Number
ltc1518cs-trpbfltc1519cs
Description
Ltc1519 - High Speed, Precision Delay Rs485 Quad Line Receivers
Manufacturer
Linear Technology Corporation
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Hot Swap is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Precision Propagation Delay: 18.5ns 3.5ns Over
0 C to 70 C Temperature Range
High Data Rate: 52Mbps
Low t
Low Channel-to-Channel Skew: 500ps Typ
Guaranteed Fail-Safe Operation over the Entire
Common Mode Range
–7V to 12V RS485 Input Common Mode Range
Input Resistance 22k, Even When Unpowered
Hot Swap
High Common Mode Rejection to 26MHz
Short-Circuit Protection: 10mA Typ Output Current
for an Indefinite Short
Three-State Output Capability
Will Not Oscillate with Slow Moving Input Signals
Single 5V Supply
Pin Compatible with LTC488, LTC489
RO
High Speed RS485/RS422 Receivers
STS-1/OC-1 Data Receivers
PECL Line Receivers
Level Translators
Fast-20/Fast-40 SCSI Receiver
DI
LTC1685
1
4
RE
DE
52Mbps Data Communication over Twisted Pair
2
3
PLH
7
6
/t
TM
PHL
Capable
100
Skew: 500ps Typ
U
EN
EN
4
12
A 1
RO
3
2 B
1/4 LTC1518
U
100
6
7
LTC1685
1518/19 F08
2
3
RE
DE
1
4
RO
DI
DESCRIPTIO
The LTC
differential quad bus/line receivers that can operate at data
rates as high as 52Mbps. They are pin compatible with the
LTC488/LTC489 RS485 line receivers and operate over the
entire – 7V to 12V common mode range. A unique architec-
ture provides very stable propagation delays and low skew
over wide input common mode, input overdrive and ambi-
ent temperature ranges. Propagation delay is 18.5ns 3.5ns
over the commercial temperature range. Typical t
and channel-to-channel skew is 500ps.
Each receiver translates differential input levels ( V
300mV) into valid CMOS and TTL output levels. Its high
input resistance ( 22k) allows many receivers to be con-
nected to the same driver. The receiver outputs go into a
high impedance state when disabled.
The receivers have a fail-safe feature that guarantees a high
output state when the inputs are shorted or left floating.
Other protection features include thermal shutdown and a
controlled maximum short-circuit current (50mA Max).
Input resistance remains
unpowered or disabled, thus allowing hot swapping with-
out loading the data lines.
The LTC1518/LTC1519 operate from a single 5V supply
and draw 12mA of supply current.
RS485 Quad Line Receivers
3V/DIV
5V/DIV
V
®
OUT
V
1518/LTC1519 are high speed, precision delay
IN
52Mbps Precision Delay
=
=
Propagation Delay Guaranteed to Fall
– 5
T
A
Within Shaded Area ( 3.5ns)
RECEIVER
= 0 C TO 70 C
0
V
OUTPUT
DD
5
= 5V
U
10
LTC1518/LTC1519
15
TIME (ns)
20
22k when the device is
25
30
RECEIVER
V
ID
INPUT
= 1.5V
35
1518/19 TA02
40 45
PLH
/t
ID
1
PHL

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ltc1518cs-trpbfltc1519cs Summary of contents

Page 1

... U APPLICATIO S High Speed RS485/RS422 Receivers STS-1/OC-1 Data Receivers PECL Line Receivers Level Translators Fast-20/Fast-40 SCSI Receiver , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. U TYPICAL APPLICATIO 52Mbps Data Communication over Twisted Pair ...

Page 2

... Operating Temperature Range LTC1518C/LTC1519C ............................. LTC1518I/LTC1519I .......................... – Storage Temperature Range ................ – 150 C + 0.5V DD Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART TOP VIEW NUMBER LTC1518CS 3 OUT 1 LTC1518IS EN12 4 OUT GND 8 S PACKAGE 16-LEAD PLASTIC SO ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER Max V for Fail-Safe Detection ID Min Time to Detect Fault Condition CMRR Common Mode Rejection Ratio U W SWITCHI CHARACTERISTICS The denotes specifications which ...

Page 4

LTC1518/LTC1519 W U TYPICAL PERFOR A CE CHARACTERISTICS CMRR vs Frequency 46.5 46.0 45.5 45.0 44.5 44.0 43 2. 100k 10M FREQUENCY (Hz) 15189 G01 Supply Current ...

Page 5

CTIO S LTC1518 B1 (Pin 1): Receiver 1 Inverting Input. A1 (Pin 2): Receiver 1 Noninverting Input. OUT 1 (Pin 3): Receiver 1 Output. EN (Pin 4): A high enables all outputs; a low on ...

Page 6

LTC1518/LTC1519 U W SWITCHI WAVEFOR S + INPUT 1/4 LTC1518 LTC1519 – 2.5V 4V INPUT 2. PLH PHL OUTPUT Figure 1. Propagation Delay Test Circuit and Waveforms INPUT A1, A2 CH1 OUT ...

Page 7

U U EQUIVALE T I PUT NETWORKS APPLICATIO S I FOR ATIO Theory of Operation Unlike typical line receivers whose propagation delay can vary by as much as 500% from package to package and show significant ...

Page 8

LTC1518/LTC1519 U U APPLICATIO S I FOR ATIO When the inputs are accidentally shorted (by cutting through a cable, for example), the short-circuit fail-safe feature will guarantee a high output logic level. Note also that if the line driver is ...

Page 9

U U APPLICATIO S I FOR ATIO Note that due to the increased skew, this configuration might not operate at the highest data rates. To transmit single-ended data over short to medium distances, twisted pair is recommended with the unused ...

Page 10

LTC1518/LTC1519 U U APPLICATIO S I FOR ATIO 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 ...

Page 11

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... High Speed, Precision Quad Differential Line Receiver LTC1685/LTC1686/ High Speed, Precision RS485 Transceivers LTC1687 LTC1688/LTC1689 High Speed, RS485 Quad Drivers UltraFast is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com High Speed Receiver with Hot Swap Control ...

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