參數(shù)資料
型號(hào): LTC1337CSW
廠商: Linear Technology
文件頁數(shù): 5/8頁
文件大?。?/td> 0K
描述: IC 3DVR/5RCVR 5V RS232 28-SOIC
標(biāo)準(zhǔn)包裝: 27
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 3/5
規(guī)程: RS232
電源電壓: 4.5 V ~ 5 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
其它名稱: LTC1337CS
5
LTC1337
1337fa
UU
U
PI FU CTIO S
DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/
CMOS compatible. Inputs should not be allowed to float.
Tie unused inputs to VCC.
DRIVER OUT: Driver Outputs at RS232 Voltage Levels.
Outputs are in a high impedance state when in Shutdown
mode or VCC = 0V. The driver outputs are protected against
ESD to ±10kV for human body model discharges.
RX IN: Receiver Inputs. These pins can be forced to ±25V
without damage. The receiver inputs are protected against
ESD to ±10kV for human body model discharges. Each
receiver provides 0.4V of hysteresis for noise immunity.
RX OUT: Receiver Outputs with TTL/CMOS Voltage Levels.
Outputs are in a high impedance state when in Shutdown
mode to allow data line sharing.
TEST CIRCUITS
DRIVER
INPUT
3k
51pF
DRIVER
OUTPUT
1337 F03
Figure 3. Driver Timing Test Load
ESD Test Circuit
1337 TC01
VCC
C1
0.1F
LTC1337
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
C3
0.1F
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
V
V+
C2
0.1F
C4
0.1F
GND
RS232
LINE PINS
PROTECTED
TO ±10kV
RX
RX IN
51pF
RX
OUTPUT
1337 F04
Figure 4. Receiver Timing Test Load
Figure 1. Driver Propagation Delay Timing
0.8V
VCC
0V
RX IN
RX
OUTPUT
1.3V
tHLR
1.7V
tLHR
1337 F02
VCC
0V
Figure 2. Receiver Propagation Delay Timing
SWITCHI G TI E WAVEFOR S
UW
W
1.4V
0V
VCC
0V
V+
V
0V
DRIVER
INPUT
DRIVER
OUTPUT
1.4V
tHLD
tLHD
1337 F01
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