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PDF LT1137AISW Data sheet ( Hoja de datos )
| Número de pieza | LT1137AISW | |
| Descripción | Advanced Low Power 5V RS232 Drivers/Receivers with Small Capacitors | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LT1130A/LT1140A Series
Advanced Low Power
5V RS232 Drivers/Receivers
with Small Capacitors
FEATURES
s ESD Protection over ±10kV
(±15kV IEC-1000-4-2 for LT1133A, LT1137A
and LT1141A)
s Uses Small Capacitors: 0.1µF, 0.2µF
s 1µA Supply Current in SHUTDOWN
s 120kBaud Operation for RL = 3k, CL = 2500pF
s 250kBaud Operation for RL = 3k, CL = 1000pF
s CMOS Comparable Low Power
s Easy PC Layout: Flowthrough Architecture
s Rugged Bipolar Design: Absolutely No Latchup
s Outputs Assume a High Impedance State When Off
or Powered Down
s Improved Protection: RS232 I/O Lines Can Be Forced
to ±30V Without Damage
s Output Overvoltage Does Not Force Current Back
into Supplies
s Available in SO and SSOP Packages
DESCRIPTIO
The LT®1130A/LT1140A series of RS232 drivers/receiv-
ers features special bipolar construction techniques which
protect the drivers and receivers beyond the fault condi-
tions stipulated for RS232. Driver outputs and receiver
inputs can be shorted to ±30V without damaging the
device or the power supply generator. In addition, the
RS232 I/O pins are resilient to multiple ±10kV ESD strikes.
An advanced driver output stage operates up to 250kbaud
while driving heavy capacitive loads. Supply current is
typically 12mA, competitive with CMOS devices.
Several members of the series include flexible operating
mode controls. The DRIVER DISABLE pin disables the
drivers and the charge pump, the ON/OFF pin shuts down
all circuitry. While shut down, the drivers and receivers
assume high impedance output states.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Basic Operation
V+ 1
0.1µF 5V VCC
0.1µF
×2
DRIVER OUT
RX IN
DRIVER OUT
TO LINE
RX IN
RX IN
RX IN
DRIVER OUT
RX IN
ON/OFF = 5V
2
3
4
5
6
7
8
9
10
11
12
13
14
LT1137A
28 V –
27
0.1µF
0.1µF
26 × 2
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22
RX OUT
21 RX OUT
TO LOGIC
20
RX OUT
19 DRIVER IN
18 RX OUT
17
GND
16
DRIVER DISABLE
15
1130A • TA01
LT1130A 5-Driver/5-Receiver RS232 Transceiver
LT1131A 5-Driver/4-Receiver RS232 Transceiver w/Shutdown
LT1132A 5-Driver/3-Receiver RS232 Transceiver
LT1133A 3-Driver/5-Receiver RS232 Transceiver
LT1134A 4-Driver/4-Receiver RS232 Transceiver
LT1135A 5-Driver/3-Receiver RS232 Transceiver w/o Charge Pump
RECEIVER
OUTPUT
CL = 50pF
DRIVER
ROUTPUT
RL = 3k
CL = 2500pF
Output Waveforms
INPUT
LT1130A • TA02
LT1136A 4-Driver/5-Receiver RS232 Transceiver w/Shutdown
LT1137A 3-Driver/5-Receiver RS232 Transceiver w/Shutdown
LT1138A 5-Driver/3-Receiver RS232 Transceiver w/Shutdown
LT1139A 4-Driver/4-Receiver RS232 Transceiver w/Shutdown
LT1140A 5-Driver/3-Receiver RS232 Transceiver w/o Charge Pump
LT1141A 3-Driver/5-Receiver RS232 Transceiver w/o Charge Pump
1
1 page  
LT1130A/LT1140A Series
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Supply Current when OFF (VCC)
Supply Rise Time
Shutdown to Turn-On
Shutdown (Note 4)
Driver Disable
C1, C2, C +, C – = 1.0µF
C +, C – = 0.1µF, C1, C2 = 0.2µF
q
1 10
4
2.0
0.2
µA
mA
ms
ms
ON/OFF Pin Thresholds
Input Low Level (Device Shut Down)
Input High Level (Device Enabled)
q 1.4 0.8
q 2.4
1.4
V
V
ON/OFF Pin Current
DRIVER DISABLE Pin Thresholds
0V ≤ VON/OFF ≤ 5V
Input Low Level (Drivers Enabled)
Input High Level (Drivers Disabled)
q – 15
80
q 1.4 0.8
q 2.4
1.4
µA
V
V
DRIVER DISABLE Pin Current
Oscillator Frequency
0V ≤ VDRIVER DISABLE ≤ 5V
q – 10
500
130
µA
kHz
Any Driver
Output Voltage Swing
Load = 3k to GND Positive
Negative
q5
7.3
q – 6.5 – 5
V
V
Logic Input Voltage Level
Logic Input Current
Output Short-Circuit Current
Output Leakage Current
Data Rate
Slew Rate
Propagation Delay
Any Receiver
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
q
q2
1.4 0.8
1.4
0.8V ≤ VIN ≤ 2V
q 5 20
VOUT = 0V
±9 ±17
Shutdown VOUT = ±30V (Note 4)
q
10 100
RL = 3k, CL = 2500pF
RL = 3k, CL = 1000pF
120
250
RL = 3k, CL = 51pF
RL = 3k, CL = 2500pF (Note 8)
15 30
6
Output Transition tHL High to Low (Note 5)
Output Transition tLH Low to High
0.6 1.3
0.5 1.3
V
V
µA
mA
µA
kbaud
kbaud
V/µs
V/µs
µs
µs
Input Voltage Thresholds
Hysteresis
Input Low Threshold (VOUT = High)
Input High Threshold (VOUT = Low)
q 0.8
1.3
q 1.7 2.4
q 0.1
0.4
1
V
V
V
Input Resistance
Output Voltage
Output Leakage Current
Output Short-Circuit Current
Propagation Delay
– 10V < VIN < 10V
357
Output Low, IOUT = – 1.6mA
q 0.2 0.4
Output High, IOUT = 160µA (VCC = 5V)
q 3.5
4.2
Shutdown (Note 4) 0 ≤ VOUT ≤ VCC
q
1 10
Sinking Current, VOUT = VCC
Sourcing Current, VOUT = 0V
– 20 – 10
10 20
Output Transition tHL High to Low (Note 6)
Output Transition tLH Low to High
250 600
350 600
kΩ
V
V
µA
mA
mA
ns
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Testing done at VCC = 5V and VON/OFF = 3V.
Note 3: Supply current is measured with driver and receiver outputs
unloaded and the driver inputs tied high.
Note 4: Supply current and driver leakage current measurements in shut-
down are performed with VON/OFF = 0.1V. Supply current measurements
using DRIVER DISABLE are performed with VDRIVER DISABLE = 3V. For
LT1135, LT1139, LT1140 and LT1141 with 12V supplies, VOUT leakage is
200µA for VOUT forced to ±25V.
Note 5: For driver delay measurements, RL = 3k and CL = 51pF. Trigger
points are set between the driver’s input logic threshold and the output
transition to the zero crossing (tHL = 1.4V to 0V and tLH = 1.4V to 0V).
Note 6: For receiver delay measurements, CL = 51pF. Trigger points
are set between the receiver’s input logic threshold and the output
transition to standard TTL/CMOS logic threshold (tHL = 1.3V to 2.4V
and tLH = 1.7V to 0.8V).
Note 7: For LT1133A/LT1137A, absolute maximum externally applied
V – = – 6.5V. Internal charge pump will drive this pin to a higher nega-
tive voltage.
Note 8: For LT1137A, 4V/µs minimum.
5
5 Page 
LT1130A/LT1140A Series
U
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.
0.600 – 0.625
(15.240 – 15.875)
0.150 ± 0.005
(3.810 ± 0.127)
0.045 – 0.065
(1.143 – 1.651)
0.009 – 0.015
(0.229 – 0.381)
0.015
(0.381)
MIN
+0.035
0.625 –0.015
( )15.87
+0.889
–0.381
0.125
(3.175)
MIN
0.035 – 0.080
(0.889 – 2.032)
0.100 ± 0.010
(2.540 ± 0.254)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
NW Package
28-Lead PDIP (Wide 0.600)
(LTC DWG # 05-08-1520)
0.070
(1.778)
TYP
1.455*
(36.957)
MAX
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0.018 ± 0.003
(0.457 ± 0.076)
0.505 – 0.560*
(12.827 – 14.224)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
N28 1197
0.291 – 0.299**
(7.391 – 7.595)
0.010
(0.254
–
–
0.029
0.737)
×
45°
SW Package
20-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.093 – 0.104
(2.362 – 2.642)
0.037 – 0.045
(0.940 – 1.143)
0.496 – 0.512*
(12.598 – 13.005)
20 19 18 17 16 15 14 13 12 11
0° – 8° TYP
0.050
0.009 – 0.013
(0.229 – 0.330)
NOTE:
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
(1.270)
TYP
0.014 – 0.019
(0.356 – 0.482)
TYP
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
NOTE 1
0.004 – 0.012
(0.102 – 0.305)
0.394 – 0.419
(10.007 – 10.643)
1 2 3 4 5 6 7 8 9 10
S20 (WIDE) 0396
0.291 – 0.299**
(7.391 – 7.595)
0.010
(0.254
–
–
0.029
0.737)
×
45°
SW Package
24-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.093 – 0.104
(2.362 – 2.642)
0.037 – 0.045
(0.940 – 1.143)
0.598 – 0.614*
(15.190 – 15.600)
24 23 22 21 20 19 18 17 16 15 14 13
0° – 8° TYP
0.050
0.009 – 0.013
(0.229 – 0.330)
NOTE:
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
(1.270)
TYP
0.014 – 0.019
(0.356 – 0.482)
TYP
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
NOTE 1
0.004 – 0.012
(0.102 – 0.305)
0.394 – 0.419
(10.007 – 10.643)
1 2 3 4 5 6 7 8 9 10 11 12
S24 (WIDE) 0996
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1137AISW.PDF ] | |
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