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参数资料
| 型号： | LT1537C |
| 厂商： | Linear Technology Corporation |
| 英文描述： | Advanced Low Power 5V RS232 Transceiver with Small Capacitors |
| 中文描述： | 先进的低功耗5V的RS232收发器采用小电容 |
| 文件页数： | 6/8页 |
| 文件大小： | 250K |
| 代理商： | LT1537C |
6
LT1537
PI FU
RX IN:
Receiver Inputs. These pins accept RS232 level
signals (
±
25V) into a protected 5k terminating resistor.
The receiver inputs are protected against ESD to
±
5kV for
human body model discharges. Each receiver provides
0.4V of hysteresis for noise immunity. Open receiver
inputs assume a logic low state.
U
RX OUT:
Receiver Outputs with TTL/CMOS Voltage Lev-
els. Outputs are in a high impedance state when in shut-
down mode to allow data line sharing. Outputs are fully
short-circuit protected to ground or V
CC
with the power
on, off, or in shutdown mode.
ESD PROTECTIOU
The RS232 line inputs of the LT1537 have on-chip protec-
tion from ESD transients up to
±
5kV during shutdown or
power ON state. The protection structures act to divert the
static discharge safely to system ground. In order for the
ESD protection to function effectively, the power supply
and ground pins of the LT1537 must be connected to
ground through low impedances. The power supply
decoupling capacitors and charge pump storage capaci-
tors provide this low impedance in normal application of
the circuit. The only constraint is that low ESR capacitors
must be used for bypassing and charge storage. ESD
testing must be done with pins V
CC
, V
+
, V
–
and GND
shorted to ground or connected with low ESR capacitors.
TYPICAL APPLICATIU
LT1537 Driving Remote Powered LTC1382
LT1537
LTC
1382
5.1V
ON/OFF = 5V
2
×
0.1
μ
F
2
×
0.1
μ
F
V
CC
V
+
V
–
V
+
V
–
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
V
CC
DRIVER
DRIVER
RECEIVER
RECEIVER
RS232 OUTPUT
RECEIVER
RECEIVER
DRIVER
DRIVER
LOGIC
INPUT
LOGIC
OUTPUT
RS232 OUTPUT
LOGIC
OUTPUT
LOGIC
INPUT
THREE
RECEIVERS
NOT USED
ON/OFF = 5V
0.1
μ
F
LT1537 TA03
DRIVER
+
+
+
+
+
+
+
+
+
+
ESD Test Circuit
LT1537 ESD TC
5V V
CC
+
0.1
μ
F
0.2
μ
F
0.1
μ
F
0.2
μ
F
RS232
LINE PINS
PROTECTED
TO
±
5kV
LT1537
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
+
+
+
V
–
V
+
+
0.1
μ
F
GND
DRIVER DISABLE
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| LT1537CG | 功能描述:IC TXRX 5V RS232 LOW-PWR 28-SSOP 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:27 系列:- 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 |
| LT1537CG#PBF | 功能描述:IC TXRX 5V RS232 LOW-PWR 28-SSOP 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:27 系列:- 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 |
| LT1537CG#TR | 功能描述:IC TXRX RS232 5V LP CAPS 28SSOP 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:27 系列:- 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 |
| LT1537CG#TRPBF | 功能描述:IC TXRX 5V RS232 LOW-PWR 28-SSOP 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:27 系列:- 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 |
| LT1537CSW | 功能描述:IC TXRX 5V RS232 LOW-PWR 28-SOIC 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:27 系列:- 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 |
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