LTC491CS#PBF Linear Technology, LTC491CS#PBF Datasheet - Page 10
![IC TXRX RS485 LOW POWER 14-SOIC](/photos/6/83/68368/ltc491cs_pbf_sml.jpg)
LTC491CS#PBF
Manufacturer Part Number
LTC491CS#PBF
Description
IC TXRX RS485 LOW POWER 14-SOIC
Manufacturer
Linear Technology
Type
Transceiverr
Datasheet
1.LTC491CNPBF.pdf
(12 pages)
Specifications of LTC491CS#PBF
Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
14-SOIC (3.9mm Width), 14-SOL
No. Of Drivers
1
Supply Voltage Range
4.75V To 5.25V
Driver Case Style
SOIC
No. Of Pins
14
Operating Temperature Range
0°C To +70°C
Msl
MSL 1 - Unlimited
Termination Type
SMD
Rohs Compliant
Yes
Filter Terminals
SMD
Ic Interface Type
RS422, RS485
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
PACKAGE DESCRIPTIO
A
Fault Protection
All of LTC’s RS485 products are protected against ESD
transients up to 2kV using the human body model (100pF,
1.5k ). However, some applications need more
protection. The best protection method is to connect a
bidirectional TransZorb
(Figure 16).
A TransZorb is a silicon transient voltage suppressor that
has exceptional surge handling capabilities, fast response
time, and low series resistance. They are available from
General Semiconductor Industries and come in a variety of
breakdown voltages and prices. Be sure to pick a break-
down voltage higher than the common mode voltage
LTC491
10
PPLICATI
O
NOTE:
1. DIMENSIONS ARE
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
U
(7.620 – 8.255)
(0.203 – 0.381)
S
8.255
®
.300 – .325
.008 – .015
.325
from each line side pin to ground
I FOR ATIO
+0.889
–0.381
+.035
–.015
U
MILLIMETERS
INCHES
W
U
(0.508)
.020
MIN
14-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
(3.302 0.127)
(6.477 0.381)
.130 .005
.255 .015*
U
(3.048)
.120
MIN
N Package
14
1
required for your application (typically 12V). Also, don’t
forget to check how much the added parasitic capacitance
will load down the bus.
TransZorb is a registered trademark of General Instruments, GSI
(0.125)
.005
MIN
13
2
(2.54)
.100
BSC
12
3
Figure 16. ESD Protection with TransZorbs
(1.143 – 1.651)
.045 – .065
(19.558)
DRIVER
MAX
.770*
11
4
10
5
9
6
(0.457 0.076)
Y
7
8
.018 .003
120
(1.651)
.065
TYP
N14 1002
Z
LTC491 • F16
491fa