- 您现在的位置：买卖IC网 > PDF目录10015 > LTC1334ISW (Linear Technology)IC CMOS TXRX MULTIPROTOCL 28SOIC PDF资料下载
参数资料
| 型号： | LTC1334ISW |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC CMOS TXRX MULTIPROTOCL 28SOIC |
| 标准包装： | 27 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/3 |
| 规程： | RS232，RS485 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 管件 |
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.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC1334INW#PBF | IC CMOS TXRX MULTIPROTOCOL 28DIP |
| VE-B3B-MX-B1 | CONVERTER MOD DC/DC 95V 75W |
| LTC1334INW | IC CMOS TXRX MULTIPROTOCOL 28DIP |
| LTC1338CG | IC 5DVR/3RCVR 5V RS232 28-SSOP |
| IDT72851L10TF8 | IC FIFO SYNC DUAL 8192X9 64QFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1334ISW#PBF | 功能描述:IC CMOS TXRX MULTIPROTOCL 28SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:1 系列:- 类型:线路收发器 驱动器/接收器数:5/3 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:Digi-Reel® 产品目录页面:918 (CN2011-ZH PDF) 其它名称:296-25096-6 |
| LTC1334ISW#PBF | 制造商:Linear Technology 功能描述:IC, RS-232/RS-485 TRANSCEIVER, 5V DIP-28 |
| LTC1334ISW#TR | 功能描述:IC TXRX CMOS MULTIPROTOCL 28SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:250 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LTC1334ISW#TRPBF | 功能描述:IC CMOS TXRX MULTIPROTOCL 28SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:250 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| LTC1334ISWPBF | 制造商:Linear Technology 功能描述:Quad RS-232/RS-485 Transceiver 5V SO28W |
发布紧急采购，3分钟左右您将得到回复。