參數(shù)資料
型號(hào): LTC1349
廠商: Linear Technology Corporation
英文描述: 5V Low Power RS232,3-Driver/5-ReceiverTransceiver(5V,低功率,RS23,3發(fā)5收收發(fā)器(關(guān)斷,帶2個(gè)活動(dòng)接收器))
中文描述: 5V的低功耗的RS232 ,3 -驅(qū)動(dòng)器/ 5 ReceiverTransceiver(5V的,低功率,RS23,3發(fā)5收收發(fā)器(關(guān)斷,帶2個(gè)活動(dòng)接收器))
文件頁(yè)數(shù): 5/8頁(yè)
文件大?。?/td> 156K
代理商: LTC1349
5
LTC1349
PI FU
DRIVER IN:
RS232 Driver Input Pins. Inputs are TTL/
CMOS compatible. Inputs should not be allowed to float.
Tie unused inputs to V
CC
.
DRIVER OUT:
Driver Outputs at RS232 Voltage Levels.
Outputs are in a high impedance state when in SHUT-
DOWN mode or V
CC
= 0V. The driver outputs are protected
against ESD to
±
10kV for human body model discharges.
U
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. Receiver 1, 2 and 3 outputs are in a high impedance
state when in SHUTDOWN mode to allow data line sharing.
Receivers 4 and 5 are kept alive in SHUTDOWN.
TI
W
E WAVEFOR
S
UG
WITCHI
W
S
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
1.4V
0V
V
CC
0V
V
+
V
0V
DRIVER
INPUT
DRIVER
OUTPUT
1.4V
t
HLD
t
LHD
LTC1349 F01
0.8V
V
CC
0V
2.4V
RX
INPUT
RX
OUTPUT
1.3V
t
HLR
1.7V
t
LHR
LTC1349 F02
V
CC
0V
TEST CIRCUITS
Driver Timing Test Load
Receiver Timing Test Load
DRIVER
DRIVER
INPUT
3k
51pF
DRIVER
OUTPUT
LTC1349 TA03
RX
RX INPUT
51pF
RX
OUTPUT
LTC1349 TA04
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