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LT1537CG Datasheet

  • LT1537CG

  • Linear Technology [Advanced Low Power 5V RS232 Transceiver ...

  • LINER

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LT1537
PI FU CTIO S
RX IN:
Receiver Inputs. These pins accept RS232 level
signals (鹵 25V) into a protected 5k terminating resistor.
The receiver inputs are protected against ESD to
鹵5kV
for
human body model discharges. Each receiver provides
0.4V of hysteresis for noise immunity. Open receiver
inputs assume a logic low state.
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 PROTECTIO
0.2碌F
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RS232
LINE PINS
PROTECTED
TO
鹵
5kV
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
4
5
6
7
8
9
10
11
12
13
14
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
GND
DRIVER DISABLE
LT1537 鈥?ESD TC
TYPICAL APPLICATIO S
LT1537 Driving Remote Powered LTC1382
2
脳
0.1碌F
+
DRIVER
V
+
2
脳
0.1碌F
V
CC
ON/OFF = 5V
+
0.1碌F
+
5.1V
0.1碌F
0.1碌F
+
LTC
廬
1382
V
+
+
0.1碌F
+
0.1碌F
V
CC
LT1537
V
鈥?/div>
DRIVER
LOGIC
INPUT
LOGIC
OUTPUT
DRIVER
RECEIVER
RECEIVER
THREE
RECEIVERS
NOT USED
RS232 OUTPUT
RS232 OUTPUT
RECEIVER
RECEIVER
DRIVER
DRIVER
LOGIC
INPUT
LOGIC
OUTPUT
ON/OFF = 5V
6
+
0.1碌F
V
鈥?/div>
0.1碌F
+
0.1碌F
LT1537 鈥?TA03
+
0.1碌F
0.1碌F
+
3
26
+
The RS232 line inputs of the LT1537 have on-chip protec-
tion from ESD transients up to
鹵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
鈥?/div>
and GND
shorted to ground or connected with low ESR capacitors.
+
+
U
U
U
U
U
ESD Test Circuit
+
+
1
V
+
5V V
CC
2
28
LT1537
27
V
鈥?/div>
0.1碌F
0.2碌F

LT1537CG 產(chǎn)品屬性

  • LT1537

  • 47

  • 集成電路 (IC)

  • 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器

  • -

  • 收發(fā)器

  • 3/5

  • RS232

  • 4.5 V ~ 5.5 V

  • 表面貼裝

  • 28-SSOP（0.209"，5.30mm 寬）

  • 28-SSOP

  • 管件

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