參數(shù)資料
型號(hào)： LTC1322
廠商： Linear Technology Corporation
英文描述： RS232/EIA562/RS485 Transceivers
中文描述： RS232/EIA562/RS485收發(fā)器
文件頁數(shù)： 14/20頁
文件大?。?/td> 454K
代理商： LTC1322
14
LTC1321/LTC1322/LTC1335
1
2
24
V
CC
5V
1321/22/35 F13
120
11
19
LTC1321
LTC1322
LTC1335
RX OUT
16
5V
10
9
8
7
6
12
15
14
13
RS485 I/O
EIA562 DR OUT
17
5V
18
V
EE
–5V
5V
0V
3
22
RX OUT
4
5
EIA562 RX IN (LTC1322/LTC1335 ONLY)
21
RX OUT
DR IN
DR ENABLE
DR IN
DR IN
20
EIA562 DR OUT (LTC1322/LTC1335 ONLY)
LTC1321/LTC1322 ONLY
EIA562 RX IN
V
DD
(LTC1321/LTC1322)
OR OE (LTC1335)
0.1
μ
F
0.1
μ
F
1
2
24
V
CC
5V
V
–
–12V
V
+
12V
1321/22/35 F14
120
0.1
μ
F
RX OUT
0.1
μ
F
0.1
μ
F
11
12
19
LTC1321
LTC1322
16
5V
10
9
8
7
6
15
14
13
RS485 I/O
*OPTIONAL
RS232 DR OUT
17
5V
Z3*
1N5246B
16V
18
V
EE
5V
0V
3
22
RX OUT
4
5
RS232 RX IN (LTC1322 ONLY)
21
RX OUT
DR IN
DR ENABLE
DR IN
DR IN
20
RS232 DR OUT (LTC1322 ONLY)
RS232 RX IN
V
DD
Z1
1N5229B
4.3V
Z2
1N5229B
4.3V
Figure 13. EIA562/RS485 Interfaces with
±
5V Supplies
Figure 14. RS232/RS485 Interfaces with 5V,
±
12V Supplies
LocalTalk
and AppleTalk
are registered trademarks of Apple Computer, Inc.
LB pin has a LOW logic state. The driver outputs are not
isolated from the external loads. This allows transmitter
verification under the loaded condition. An internal 4
μ
A
current source pulls the LB pin HIGH if left open and
disables the loopback configuration.
EIA562/RS485 Applications
EIA562 and RS485 output levels are supported when
LTC1321/LTC1322/LTC1335 are powered from
±
5V sup-
plies. The LTC1321/LTC1322 require the V
DD
and V
CC
pins
to be tied together and connected to 5V supply (Figure 13).
The V
DD
and V
CC
are connected internally and brought out
at V
CC
pin in the LTC1335. The unloaded outputs will
swing from –5V to 5V in EIA562 mode, and from 0V to 5V
in RS485 mode.
RS232/RS485 Applications
If true RS232-compatible outputs are required, the
LTC1321/LTC1322 may be used with the V
DD
and V
EE
supply voltages increased to provide the additional signal
swing. To meet RS232, V
DD
must be between 6.5V and
10V, and V
EE
must be between –6.5V and –10V. V
CC
remains connected to 5V. If only
±
12V supplies are avail-
able, inexpensive Zener diodes (Z1 and Z2) may be con-
nected in series with V
DD
and V
EE
supply pins as shown in
Figure 14. An optional 16V Zener diode between V
CC
and
V
EE
is recommended to keep the maximum voltage be-
tween V
CC
and V
EE
within safe limits.
LocalTalk
/AppleTalk
Applications
The LTC1321/LTC1322/LTC1335 can be used to provide
AppleTalk/LocalTalk-compatible signals in RS485 mode.
Figure 15 shows one half of an LTC1335 connected to an
LTC1320 AppleTalk transceiver in a typical LocalTalk
configuration. Figure 16 shows a typical direct-wire con-
nection with the LTC1335 as the DCE transceiver and the
LTC1320 as the DTE transceiver. The LTC1321/LTC1322/
LTC1335 RS485 mode is capable of meeting all AppleTalk
protocol specifications.
U
S
A
O
PPLICATI
IU
U
相關(guān)PDF資料
PDF描述
LTC1322C RS232/EIA562/RS485 Transceivers
LTC1322CN Octal Bus Transceivers/Registers With 3-State Outputs 24-PDIP 0 to 70
LTC1322CS RS232/EIA562/RS485 Transceivers
LTC1322I RS232/EIA562/RS485 Transceivers
LTC1335 RS232/EIA562/RS485 Transceivers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1322CN 功能描述:IC TXRX RS232/RS485/EIA562 24DIP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
LTC1322CN#PBF 功能描述:IC TXRX RS232/RS485/EIA562 24DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
LTC1322CSW 功能描述:IC TXRX RS232/485/EIA562 24-SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
LTC1322CSW#PBF 功能描述:IC TXRX RS232/485/EIA562 24-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
LTC1322CSW#TR 功能描述:IC TXRX RS232/485/EIA562 24SOIC RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:27 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):3/3 規(guī)程:RS232，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
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