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参数资料
| 型号： | LTC1348ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 3.3-5V LPWR 28SOIC |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/5 |
| 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： | 带卷 (TR) |
3
LTC1348
ELECTRICAL C
C
HARA TERISTICS
C
D
VCC = 3V to 5.5V, C1 to C4 = 0.1F, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Generator
V+ Output Voltage
IOUT = 0mA
8.0
V
IOUT = 8mA
7.5
V
V– Output Voltage
IOUT = 0mA
– 8.0
V
IOUT = – 8mA
– 7.0
V
Supply Rise Time
Shutdown to Turn-On
0.2
ms
Power Supply
VCC Supply Current
No Load (Note 2) VCC = 3.3V
q
0.6
2.0
mA
No Load (Note 2) VCC = 5V
q
0.8
2.5
mA
Receiver Alive Mode (Note 4) VCC = 3.3V or 5V
q
15
30
A
Supply Leakage Current (VCC)
Shutdown (Note 3)
q
0.2
10
A
Driver/Receiver Enable Threshold Low
q
0.8
V
Driver/Receiver Enable Threshold High
VCC = 3.3V
q
2.0
V
Driver/Receiver Enable Threshold High
VCC = 5V
q
2.4
V
AC ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Data Rate
RL = 3k, CL = 1000pF, One Driver Switching
120
250
kbps
Slew Rate
VCC = 5V, RL = 3k, CL = 51pF
8
30
V/
s
VCC = 3.3V, RL = 3k, CL = 2500pF
3
V/
s
Driver Propagation Delay
tHLD (Figure 1)
q
2.5
4
s
(TTL to RS232)
tLHD (Figure 1)
q
2.5
4
s
Receiver Propagation Delay
tHLR (Figure 2) (Normal Mode)
q
0.3
1
s
(RS232 to TTL)
tLHR (Figure 2) (Normal Mode)
q
0.2
1
s
tHLR (Figure 2) (Receiver Alive Mode)
q
1.0
4
s
tLHR (Figure 2) (Receiver Alive Mode)
q
0.2
4
s
Note 3: Supply current measurement in Shutdown is performed with
VDREN and VRXEN = 0V.
Note 4: Supply current measurement in Receiver Alive mode is performed
with VDREN = 0V and VRXEN = VCC.
VCC = 3V to 5.5V, C1 to C4 = 0.1F, unless otherwise noted.
The q denotes specifications which apply over the full operating
temperature range (0
°C ≤ TA ≤ 70°C for Commercial grade and
–40
°C ≤ TA ≤ 85°C for Industrial grade).
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Supply current is measured with driver and receiver outputs
unloaded. The VDREN and VRXEN = VCC.
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