參數資料
型號: LTC1338ISW#TR
廠商: Linear Technology
文件頁數: 5/8頁
文件大?。?/td> 0K
描述: IC TXRX RS232 5V LOW PWR 28SOIC
標準包裝: 1,000
類型: 收發(fā)器
驅動器/接收器數: 5/3
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)
供應商設備封裝: 28-SOIC
包裝: 帶卷 (TR)
5
LTC1338
PI FU CTIO S
U
UU
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 SHUT-
DOWN, RECEIVER ALIVE 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 Lev-
els. Outputs are in a high impedance state when in SHUT-
DOWN or RECEIVER DISABLE mode to allow data line
sharing.
Table 1. Functional Description
MODE
RX ENABLE
DR ENABLE
DRIVERS
RECEIVERS
ICC (A)(TYP)
SHUTDOWN
0
All driver outputs are
All receiver outputs are
0.2
high impedance.
Receiver Disable
0
1
All drivers alive.
All receiver outputs are
500
high impedance.
RECEIVER ALIVE
1
0
All driver outputs are
All receivers alive.
50
high impedance.
Normal
1
All drivers alive.
All receivers alive.
500
TI
W
E WAVEFOR
S
U
G
WITCHI
W
S
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
1.4V
0V
VCC
0V
V+
V
0V
DRIVER
INPUT
DRIVER
OUTPUT
1.4V
t HLD
t LHD
LTC1338 F01
0.8V
VCC
0V
2.4V
RX
INPUT
RX
OUTPUT
1.3V
t HLR
1.7V
t LHR
LTC1338 F02
VCC
0V
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