- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10020 > LTC1334CSW#TRPBF (Linear Technology)IC CMOS TXRX MULTIPROTOCL 28SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC1334CSW#TRPBF |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC CMOS TXRX MULTIPROTOCL 28SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 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： | 帶卷 (TR) |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
11
LTC1334
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Basic Theory of Operation
The LTC1334 has two interface ports. Each port may be
configured as a pair of single-ended RS232 transceivers
or as a differential RS485 transceiver by forcing the
port’s selection input to a low or high, respectively. The
LTC1334 provides two RS232 drivers and two RS232
receivers or one RS485 driver and one RS485 receiver
per port. All the interface drivers feature three-state
outputs. Interface outputs are forced into high imped-
ance when the driver is disabled, in the shutdown mode
or with the power off.
All the interface driver outputs are fault-protected by a
current limiting and thermal shutdown circuit. The ther-
mal shutdown circuit disables both the RS232 and RS485
driver outputs when the die temperature reaches 150
°C.
The thermal shutdown circuit reenables the drivers when
the die temperature cools to 130
°C.
In RS485 mode, shutdown mode or with the power off, the
input resistance of the receiver is 24k. The input resistance
drops to 5k in RS232 mode.
A logic low at the ON/OFF pin shuts down the device and
forces all the outputs into a high impedance state. A logic
high enables the device. An internal 4
A current source to
VCC pulls the ON/OFF pin high if it is left open.
Figure 11. RS232/RS485 Interfaces
1
28
VCC
5V
LTC1334 F11
120
12
21
LTC1334
RX OUT
18
5V
13
10
11
9
8
14
17
16
RS485 I/O
RS232 DR OUT
19
5V
20
15
VEE
5V
≥ ±5V INTO
3k
LOAD
5
4
27
26
24
RX OUT
6
RS232 RX IN
23
2
3
RX OUT
7
DR IN
DR ENABLE
DR IN
22
RS232 DR OUT
RS232 RX IN
VDD
C1
C2
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
In RS485 mode, an internal 4
A current source pulls the
driver enable pin high if left open. The RS485 receiver has
a 4
A current source at the noninverting input. If both the
RS485 receiver inputs are open, the output goes to a high
state. Both the current sources are disabled in the RS232
mode. The receiver output B is inactive in RS485 mode
and has a 50k pull-up resistor to provide a known output
state in this mode.
A loopback mode enables internal connections from driver
outputs to receiver inputs for self-test when the 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
Acurrentsource
pulls the LB pin high if left open and disables the loopback
configuration.
RS232/RS485 Applications
The LTC1334 can support both RS232 and RS485 levels
with a single 5V supply as shown in Figure 11.
Multiprotocol Applications
The LTC1334 is well-suited for software controlled inter-
face mode selection. Each port has a selection pin as
shown in Figure 12. The single-ended transceivers sup-
port both RS232 and EIA562 levels. The differential trans-
ceivers support both RS485 and RS422.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS3100E18-8S | CONN RCPT 8POS WALL MNT W/SCKT |
| MS27474T20A35PB | CONN RCPT 79POS JAM NUT W/PINS |
| MS27473T14F15PA | CONN PLUG 15POS STRAIGHT W/PINS |
| LTC1334CSW#TR | IC TXRX CMOS MULTIPROTOCL 28SOIC |
| LTC1337CNW | IC 3DVR/5RCVR 5V RS232 28-DIP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1334IG | 功能描述:IC TXRX CMOS MULTIPROTOCL 28SSOP 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:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| LTC1334IG#PBF | 功能描述:IC TXRX CMOS MULTIPROTOCL 28SSOP 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:- 產(chǎn)品培訓(xùn)模塊:RS-232 & USB Transceiver 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):1/1 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:296-19849-2 |
| LTC1334IG#PBF | 制造商:Linear Technology 功能描述:RS232/RS485 Transceiver IC 制造商:Linear Technology 功能描述:IC, RS-232/RS-485 TRANSCEIVER, 5V SSOP28 |
| LTC1334IG#TR | 功能描述:IC TXRX CMOS MULTIPROTOCL 28SSOP 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:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| LTC1334IG#TRPBF | 功能描述:IC TXRX CMOS MULTIPROTOCL 28SSOP 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:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。