LTC1337_1 [Linear]
5V Low Power RS232 3-Driver/5-Receiver Transceiver; 5V低功耗RS232 3驱动器/ 5接收器收发器
| 型号： | LTC1337_1 |
| 厂家： | 
Linear |
| 描述： | 5V Low Power RS232 3-Driver/5-Receiver Transceiver |
| 文件： | 总8页 (文件大小：124K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1337
5V Low Power RS232
3-Driver/5-Receiver Transceiver
U
FEATURES
DESCRIPTIO
The LTC®1337 is a 3-driver/5-receiver RS232 transceiver
with very low supply current. In the no load condition, the
supply current is only 300µA. The charge pump only
requires four 0.1µF capacitors and can supply up to 12mA
of extra current to power external circuitry.
■
Low Supply Current: 300µA
■
ESD Protection: Over ±10kV
■
1µA Supply Current in Shutdown
Operates from a Single 5V Supply
Uses Small Capacitors: 0.1µF
Operates to 120k Baud
■
■
■
In Shutdown mode, the supply current is further reduced
to 1µA. All RS232 outputs assume a high impedance state
in Shutdown and with the power off.
■
Three-State Outputs Are High Impedance When Off
■
Output Overvoltage Does Not Force Current Back into
Supplies
■
The LTC1337 is fully compliant with all data rate and
overvoltage RS232 specifications. The transceiver can
operate up to 120k baud with a 1000pF//3kΩ load. Both
driver outputs and receiver inputs can be forced to ±25V
without damage, and can survive multiple ±10kV ESD
strikes.
RS232 I/O Lines Can Be Forced to ±25V without
Damage
Pin Compatible with LT®1137A and LT1237
Flowthrough Architecture
■
■
U
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Notebook Computers
Palmtop Computers
■
U
TYPICAL APPLICATIO
3-Drivers/5-Receivers with Shutdown
Supply Current
1.2
1.0
0.8
0.6
0.4
0.2
0
600
500
400
300
200
100
0
–
+
V
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
V
LTC1337
C1
0.1µF
C4
0.1µF
CC
C3
3
0.1µF
C2
0.1µF
4
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
QUIESCENT
CURRENT
5
DRIVER 1 OUT
RX1 IN
6
7
DRIVER 2 OUT
RX2 IN
8
SHUTDOWN
CURRENT
9
RX3 IN
10
11
12
13
14
RX4 IN
DRIVER 3 OUT
RX5 IN
0
20
40
60
80
–20
TEMPERATURE (°C)
ON/OFF
TEST CONDITION:
= 5V, ALL DRIVER INPUTS TIED TO V
V
CC
CC
1337 TA01
1337 TA02
1337fa
1
LTC1337
W W
U W
U W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
TOP VIEW
ORDER PART
NUMBER
Supply Voltage (VCC) ................................................ 6V
Input Voltage
Driver ....................................... –0.3V to VCC + 0.3V
Receiver ............................................... – 25V to 25V
On/Off Pin.................................. –0.3V to VCC + 0.3V
Output Voltage
+
V
1
2
3
4
5
6
7
8
9
28 V–
V
27 C2+
CC
+
C1
C1–
26 C2–
LTC1337CG
LTC1337CNW
LTC1337CSW
25 DR1 IN
24 RX1 OUT
23 DR2 IN
22 RX2 OUT
21 RX3 OUT
20 RX4 OUT
19 DR3 IN
18 RX5 OUT
17 GND
DR1 OUT
RX1 IN
DR2 OUT
RX2 IN
RX3 IN
Driver .................................................... – 25V to 25V
Receiver .................................... – 0.3V to VCC + 0.3V
Short Circuit Duration
V+ ................................................................... 30 sec
V– ................................................................... 30 sec
Driver Output.............................................. Indefinite
Receiver Output.......................................... Indefinite
Operating Temperature Range
RX4 IN 10
DR3 OUT 11
RX5 IN 12
ON/OFF 13
NC 14
16 NC
15 NC
Commercial (LTC1337C) ........................ 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
G PACKAGE
28-LEAD PLASTIC SSOP
NW PACKAGE
28-LEAD PDIP
SW PACKAGE
28-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 96°C/W (G)
T
JMAX = 125°C, θJA = 56°C/W (NW)
TJMAX = 125°C, θJA = 85°C/W (SW)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS
The ■ denotes specifications which apply over the full operating
temperature range. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Any Driver
Output Voltage Swing
R = 3k to GND
R = 3k to GND
L
Positive
Negative
■
■
5.0
–5.0
7.0
– 6.5
V
V
L
Logic Input Voltage Level
Logic Input Current
Input Low Level (V
Input High Level (V
= High)
= Low)
■
■
1.4
1.4
0.8
V
V
µA
µA
OUT
2.0
OUT
V
V
= 5V
= 0
■
■
5
–5
IN
IN
Output Short-Circuit Current
Output Leakage Current
Any Receiver
V
= 0V
±10
10
mA
µA
OUT
Shutdown, V
= ±20V (Note 3)
■
500
OUT
Input Voltage Thresholds
Input Low Threshold
Input High Threshold
■
■
0.8
1.3
1.7
0.4
5
0.2
4.8
V
V
V
kΩ
V
V
2.4
1
7
Hysteresis
Input Resistance
Output Voltage
■
0.1
3
– 10V ≤ V ≤ 10V
IN
Output Low, I
Output High, I
= – 1.6mA (V = 5V)
= 160µA (V = 5V)
■
■
0.4
OUT
CC
3.5
OUT
CC
Output Short-Circuit Current
Output Leakage Current
Sourcing Current, V
= 0
15
–15
20
–40
1
mA
mA
µA
OUT
Sinking Current, V
= V
OUT
CC
Shutdown, 0 ≤ V
≤ V (Note 3)
■
10
OUT
CC
1337fa
2
LTC1337
DC ELECTRICAL CHARACTERISTICS
The ■ denotes specifications which apply over the full operating
temperature range. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Supply Generator
+
V Output Voltage
I
I
I
I
= 0mA
= 12mA
= 0mA
= 12mA
8.0
7.5
–8.0
–6.5
V
V
V
V
OUT
OUT
–
V Output Voltage
OUT
OUT
Supply Rise Time
Shutdown to Turn-On
0.2
ms
Power Supply
V
Supply Current
No Load (Note 2)
Shutdown (Note 3)
■
■
■
■
0.3
1
1.4
1.4
0.5
10
0.8
mA
µA
V
CC
Supply Leakage Current (V
On/Off Threshold Low
On/Off Threshold High
)
CC
2.0
V
AC CHARACTERISTICS
The ■ denotes specifications which apply over the full operating temperature range.
VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
PARAMETER
CONDITIONS
R = 3k, C = 51pF
MIN
TYP
MAX
UNITS
Slew Rate
8
4
30
V/µs
V/µs
L
L
R = 3k, C = 2500pF
2
L
L
Driver Propagation Delay
(TTL to RS232)
Receiver Propagation Delay
(RS232 to TTL)
t
t
t
t
(Figure 1)
■
■
■
■
2
2
0.3
0.2
3
3
0.6
0.6
µs
µs
µs
µs
HLD
LHD
HLR
LHR
(Figure 1)
(Figure 2)
(Figure 2)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 3: Supply current and leakage measurements in Shutdown are
performed with V = 0V.
ON
Note 2: Supply current is measured with driver and receiver outputs
unloaded and driver inputs tied high.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage
Receiver Input Thresholds
Supply Current vs Data Rate
10
8
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
45
40
35
30
25
20
15
10
5
R
L
= 3k
OUTPUT HIGH
= 5V
V
= 5V
CC
L
L
R
= 3k
V
CC
= 4.5V
C
= 2500pF
6
INPUT HIGH
3 DRIVERS ACTIVE
V
CC
4
2
0
INPUT LOW
–2
–4
–6
–8
OUTPUT LOW
= 4.5V
V
CC
V
= 5V
50
CC
0
30
30
TEMPERATURE (°C)
75
0
10
20
40
60
70
0
10
20
40
50
60
70
0
25
50
100 125 150 175
TEMPERATURE (°C)
DATA RATE (k BAUD)
1337 G01
1337 G02
1337 G03
1337fa
3
LTC1337
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Driver Leakage in Shutdown
VCC Supply Current
Driver Short-Circuit Current
20
16
14
12
10
8
45
40
35
30
25
20
15
10
5
20
18
16
14
12
10
8
3 DRIVERS LOADED
R
= 3k
L
–
V
= –20V
I
OUT
SC
1 DRIVER LOADED
+
I
6
SC
R
L
= 3k
4
6
V
= 20V
50
OUT
40
2
4
0
0
2
30
TEMPERATURE (°C)
30
30
TEMPERATURE (°C)
0
10
20
40
50
60
70
0
10
20
60
70
0
10
20
40
50
60
70
TEMPERATURE (°C)
1337 G04
1337 G05
1337 G06
Receiver Short-Circuit Current
Driver Output Waveforms
Receiver Output Waveforms
55
50
45
40
35
30
25
20
15
10
DRIVER
OUTPUT
RX
OUTPUT
CL = 50pF
RL = 3k
C
L = 2500pF
–
I
SC
DRIVER
OUTPUT
RL = 3k
INPUT
+
INPUT
I
SC
30
0
10
20
40
50
60
70
TEMPERATURE (°C)
1337 G07
U
U
U
PI FU CTIO S
With multiple devices, the V + and V– pins may be paral-
leled into common capacitors. For large numbers of
devices,increasingthesizeofthesharedcommonstorage
capacitors is recommended to reduce ripple.
V–: Negative Supply Output (RS232 Drivers). V– ≅ (2VCC
–1.5V). This pin requires an external capacitor C = 0.1µF
for charge storage.
C1+,C1–,C2+,C2–:CommutatingCapacitorInputs.These
pins require two external capacitors C = 0.1µF. One from
C1+ to C1–, and another from C2+ to C2–. To maintain
charge pump efficiency, the capacitor’s effective series
resistance should be less than 50Ω.
VCC: 5V Input Supply Pin. Supply current less than 1µA in
the Shutdown mode. This pin should be decoupled with a
0.1µF ceramic capacitor.
GND: Ground Pin.
ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logic
low puts the device in the Shutdown mode which reduces
input supply current to less than 1µA and places all drivers
and receivers in high impedance state. This pin cannot
float.
V+: Positive Supply Output (RS232 Drivers). V+ ≅ 2VCC
–
1V. This pin requires an external capacitor C = 0.1µF for
chargestorage. Thecapacitormaybetiedtogroundor5V.
1337fa
4
LTC1337
U
U
U
PI FU CTIO S
DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/
CMOS compatible. Inputs should not be allowed to float.
Tie unused inputs to VCC.
RX IN: Receiver Inputs. These pins can be forced to ±25V
withoutdamage. Thereceiverinputsareprotectedagainst
ESD to ±10kV for human body model discharges. Each
receiver provides 0.4V of hysteresis for noise immunity.
DRIVER OUT: Driver Outputs at RS232 Voltage Levels.
Outputs are in a high impedance state when in Shutdown
modeorVCC =0V.Thedriveroutputsareprotectedagainst
ESD to ±10kV for human body model discharges.
RXOUT:ReceiverOutputswithTTL/CMOSVoltageLevels.
Outputs are in a high impedance state when in Shutdown
mode to allow data line sharing.
U W
W
SWITCHI G TI E WAVEFOR S
V
V
CC
CC
1.7V
DRIVER
RX IN
1.3V
1.4V
1.4V
INPUT
0V
0V
V
+
V
CC
DRIVER
OUTPUT
RX
OUTPUT
0V
0V
0V
0.8V
–
V
0V
t
t
LHR
t
t
HLR
LHD
HLD
1337 F01
1337 F02
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
TEST CIRCUITS
DRIVER
OUTPUT
DRIVER
DRIVER
INPUT
ESD Test Circuit
51pF
3k
–
+
V
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
V
LTC1337
C1
C4
0.1µF
0.1µF
CC
C3
0.1µF
3
1337 F03
C2
0.1µF
4
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
GND
5
Figure 3. Driver Timing Test Load
DRIVER 1 OUT
RX1 IN
6
7
RS232
LINE PINS
PROTECTED
TO ±10kV
DRIVER 2 OUT
RX2 IN
8
9
RX3 IN
10
11
12
13
14
RX
RX4 IN
OUTPUT
RX IN
RX
DRIVER 3 OUT
RX5 IN
51pF
ON/OFF
1337 F04
1337 TC01
Figure 4. Receiver Timing Test Load
1337fa
5
LTC1337
TYPICAL APPLICATIO S
U
Operation Using 5V and 12V Power Supplies
–
+
V
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
V
LTC1337
+
–
CC
+
C2
0.1µF
C2
5V V
CC
C1
3
+
12V V
+
0.1µF
4
+
–
0.01µF
0.01µF
C1
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
5
DRIVER OUT
RX IN
6
7
DRIVER OUT
RX IN
TO LOGIC
8
TO LINE
9
RX IN
10
11
12
13
14
RX IN
DRIVER OUT
RX IN
ON/0FF = 5V
1337 TA03
Typical Mouse Driving Application
–
+
V
1
2
28
27
26
V
+
LTC1337
C2
+
0.1µF
0.1µF
5V V
+
0.1µF
CC
+
MOUSE
C1
3
–
C2
0.1µF
4
25 DRIVER IN
24 RX OUT
23 DRIVER IN
22 RX OUT
21 RX OUT
20 RX OUT
19 DRIVER IN
18 RX OUT
17 GND
–
C1
LOGIC “0”
LOGIC “0”
+
V
5
DRIVER OUT
RX IN
LOGIC
6
DCD
(1)
7
DSR
RX
DRIVER OUT
RX IN
8
MOUSE DATA
LOGIC “1”
9
RTS
TX
RX IN
OPTICS
10
11
12
13
14
RX IN
–
CTS
DTR
RI
DRIVER OUT
RX IN
V
16
ON/OFF
(9)
(5)
15
1337 TA04
DB9
1337fa
6
LTC1337
U
PACKAGE DESCRIPTIO
G Package
28-Lead Plastic SSOP (5.3mm)
(Reference LTC DWG # 05-08-1640)
9.90 – 10.50*
(.390 – .413)
1.25 ±0.12
28 27 26 25 24 23 22 21 20 19 18
16 15
17
7.8 – 8.2
5.3 – 5.7
7.40 – 8.20
(.291 – .323)
0.42 ±0.03
0.65 BSC
5
7
8
1
2
3
4
6
9 10 11 12 13 14
RECOMMENDED SOLDER PAD LAYOUT
5.00 – 5.60**
(.197 – .221)
2.0
(.079)
0° – 8°
0.65
(.0256)
BSC
0.09 – 0.25
0.55 – 0.95
(.0035 – .010)
(.022 – .037)
0.05
0.22 – 0.38
(.009 – .015)
(.002)
NOTE:
G28 SSOP 0802
1. CONTROLLING DIMENSION: MILLIMETERS
MILLIMETERS
2. DIMENSIONS ARE IN
(INCHES)
3. DRAWING NOT TO SCALE
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED .152mm (.006") PER SIDE
**DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE
NW Package
28-Lead PDIP (Wide .600 Inch)
(Reference LTC DWG # 05-08-1520)
1.467*
(36.957)
MAX
28
27
26
25
24
23
22
21
20
19
18
17
16
15
.505 – .560*
(12.827 – 14.224)
1
2
3
5
7
9
4
6
8
10
11
12
13
14
.600 – .625
(15.240 – 15.875)
.045 – .065
(1.143 – 1.651)
.150 ± .005
(3.810 ± 0.127)
.015
(0.381)
MIN
.070
(1.778)
TYP
.008 – .015
(0.203 – 0.381)
+.035
.625
.035 – .080
(0.889 – 2.032)
–.015
.120
(3.175)
MIN
.018 ± .003
(0.457 ± 0.076)
+0.889
15.87
(
)
–0.381
.100
(2.54)
BSC
NOTE:
INCHES
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
NW28 1002
1337fa
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-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
7
LTC1337
U
PACKAGE DESCRIPTIO
SW Package
28-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 ±.005
.030 ±.005
TYP
.697 – .712
(17.70 – 18.08)
NOTE 4
N
28 27 26 25 24 23 22 21 20 19 18
16 15
17
N
.325 ±.005
.420
MIN
.394 – .419
(10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
.291 – .299
(7.391 – 7.595)
NOTE 4
2
3
5
7
8
9
10 11 12 13 14
1
4
6
.037 – .045
(0.940 – 1.143)
.093 – .104
.010 – .029
× 45°
(2.362 – 2.642)
(0.254 – 0.737)
.005
(0.127)
RAD MIN
0° – 8° TYP
.050
(1.270)
BSC
.004 – .012
.009 – .013
NOTE 3
(0.102 – 0.305)
(0.229 – 0.330)
.014 – .019
.016 – .050
(0.356 – 0.482)
TYP
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
INCHES
(MILLIMETERS)
S28 (WIDE) 0502
2. DRAWING NOT TO SCALE
3. 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
4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1137A
5V, 3 Driver, 5 Receiver RS232 Transceiver
3.3V, 3 Driver, 5 Receiver RS562 Transceiver
3.3V to 5V, 3 Driver, 5 Receiver RS232 Transceiver
±15kV ESD per IEC 1000-4
LTC1327
300µA Supply Current, 0.2µA in Shutdown
LTC1348
True RS232 on 3.3V, 5 Receivers Active in Shutdown
1337fa
LW/TP 0103 1K REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
8
■
■
LINEAR TECHNOLOGY CORPORATION 1993
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
相关型号：
LTC1338CG#TR
LTC1338 - 5V Low Power RS232 5-Driver/3-Receiver Transceiver; Package: SSOP; Pins: 28; Temperature Range: 0°C to 70°C
Linear
LTC1338CSW
LTC1338 - 5V Low Power RS232 5-Driver/3-Receiver Transceiver; Package: SO; Pins: 28; Temperature Range: 0°C to 70°C
Linear
LTC1338CSW#PBF
LTC1338 - 5V Low Power RS232 5-Driver/3-Receiver Transceiver; Package: SO; Pins: 28; Temperature Range: 0°C to 70°C
Linear
LTC1338CSW#TR
LTC1338 - 5V Low Power RS232 5-Driver/3-Receiver Transceiver; Package: SO; Pins: 28; Temperature Range: 0°C to 70°C
Linear
LTC1338CSW#TRPBF
LTC1338 - 5V Low Power RS232 5-Driver/3-Receiver Transceiver; Package: SO; Pins: 28; Temperature Range: 0°C to 70°C
Linear
©2020 ICPDF网 联系我们和版权申明