LTC490
APPLICATI
S I FOR ATIO
suppressor that has exceptional surge handling capabili-
ties, fast response time, and low series resistance. They
are available from General Instruments, GSI and come in
a variety of breakdown voltages and prices. Be sure to pick
a breakdown voltage higher than the common- mode
voltage required for your application (typically 12V). Also,
don鈥檛 forget to check how much the added parasitic
capacitance will load down the bus.
TYPICAL APPLICATI
S
RS232 to RS485 Level Transistor with Hysteresis
R = 220k
Y
RS232 Receiver
RS232 IN
5.6k
RECEIVER
1/2 LTC490
LTC490 鈥?TA13
RX
PACKAGE DESCRIPTIO
Dimensions in inches (millimeters) unless otherwise noted.
N8 Package
8-Lead Plastic DIP
0.300 鈥?0.320
(7.620 鈥?8.128)
0.045 鈥?0.065
(1.143 鈥?1.651)
0.009 鈥?0.015
(0.229 鈥?0.381)
0.065
(1.651)
TYP
0.125
(3.175)
MIN
0.020
(0.508)
MIN
(
+0.025
0.325 鈥?.015
+0.635
8.255
鈥?.381
)
0.045 鹵 0.015
(1.143 鹵 0.381)
0.100 鹵 0.010
(2.540 鹵 0.254)
0.010 鈥?0.020
脳
45擄
(0.254 鈥?0.508)
0.008 鈥?0.010
(0.203 鈥?0.254)
0.016 鈥?0.050
0.406 鈥?1.270
0擄鈥?8擄 TYP
0.053 鈥?0.069
(1.346 鈥?1.752)
0.004 鈥?0.010
(0.101 鈥?0.254)
0.228 鈥?0.244
(5.791 鈥?6.197)
0.014 鈥?0.019
(0.355 鈥?0.483)
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
U
Y
DRIVER
120鈩?/div>
Z
LTC490 鈥?TA12
U
W
UO
U
UO
Figure 11. ESD Protection with TransZorbs
廬
10k
RS232 IN
5.6k
DRIVER
1/2 LTC490
120鈩?/div>
Z
錚Y
- VZ錚?19k
HYSTERESIS = 10k 鈥?鈥斺€斺€斺€?/div>
鈮?/div>
鈥斺€?/div>
R
R
LTC490 鈥?TA14
0.130 鹵 0.005
(3.302 鹵 0.127)
8
0.400
(10.160)
MAX
7
6
5
0.250 鹵 0.010
(6.350 鹵 0.254)
1
2
3
4
0.018 鹵 0.003
(0.457 鹵 0.076)
S8 Package
8-Lead Plastic SOIC
8
0.189 鈥?0.197
(4.801 鈥?5.004)
7
6
5
0.050
(1.270)
BSC
0.150 鈥?0.157
(3.810 鈥?3.988)
1
2
3
4
BA/LT/GP 0893 5K REV A 鈥?PRINTED IN USA
漏
LINEAR TECHNOLOGY CORPORATION 1993
LTC490C PDF文件相關(guān)型號
LTC490I
LTC490C相關(guān)型號PDF文件下載
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型號
版本
描述
廠商
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