LTC1337CN [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： | LTC1337CN |
| 厂家： | 
Linear |
| 描述： | 5V Low Power RS232 3-Driver/5-Receiver Transceiver |
| 文件： | 总8页 (文件大小：235K) |
| 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
DESCRIPTIO
EATURE
Low Supply Current: 300µA
1µA Supply Current in SHUTDOWN
ESD Protection: Over ±10kV
Operates from a Single 5V Supply
Uses Small Capacitors: 0.1µF
Operates to 120k Baud
Three-State Outputs Are High Impedance When Off
Output Overvoltage Does Not Force Current Back into
Supplies
RS232 I/O Lines Can Be Forced to ±25V without
Damage
Pin Compatible with LT1137A and LT1237
Flowthrough Architecture
S
F
■
■
■
■
■
■
■
■
The LTC1337 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.
In SHUTDOWN mode, the supply current is further re-
duced to 1µA. All RS232 outputs assume a high imped-
ance state in SHUTDOWN and with the power off.
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.
■
■
■
O U
PPLICATI
Notebook Computers
Palmtop Computers
S
A
■
■
U
O
TYPICAL APPLICATI
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
0.1µF
3
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
1
LTC1337
W W W
U
/O
ABSOLUTE AXI U RATI GS
PACKAGE RDER I FOR ATIO
(Note 1)
ORDER PART
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
TOP VIEW
NUMBER
+
–
V
1
2
3
4
5
6
7
8
9
28
V
+
–
V
27 C2
26 C2
CC
+
C1
C1
LTC1337CG
LTC1337CN
LTC1337CS
–
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
Driver .................................................... – 25V to 25V
Receiver .................................... – 0.3V to VCC + 0.3V
Short Circuit Duration
DR2 OUT
RX2 IN
RX3 IN
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
16 NC
NC
14
15 NC
G PACKAGE
N PACKAGE
28-LEAD PLASTIC DIP
Commercial (LTC1337C) ........................ 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
28-LEAD SSOP
S PACKAGE
28-LEAD PLASTIC SOL
TJMAX = 125°C, θJA = 96°C/W (G)
TJMAX = 125°C, θJA = 56°C/W (N)
JMAX = 125°C, θJA = 85°C/W (S)
T
Consult factory for Industrial and Military grade parts.
DC ELECTRICAL CHARACTERISTICS V
CC = 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
IN
V
IN
= 5V
= 0
●
●
5
–5
Output Short-Circuit Current
Output Leakage Current
Any Receiver
V
= 0V
±10
10
mA
µA
OUT
SHUTDOWN, V
= ±20V (Note 3)
●
200
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
Output Low, I
= – 1.6mA (V = 5V)
= 160µA (V = 5V)
●
●
0.4
OUT
CC
Output High, I
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
2
LTC1337
DC ELECTRICAL CHARACTERISTICS V
CC = 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
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Slew Rate
R = 3k, C = 51pF
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 2: Supply current is measured with driver and receiver outputs
The
● denotes specifications which apply over the operating temperature
unloaded and driver inputs tied high.
range (0°C ≤ T ≤ 70°C).
A
Note 3: Supply current and leakage measurements in SHUTDOWN are
Note 1: Absolute maximum ratings are those values beyond which the life
performed with V = 0V.
of the device may be impaired.
ON
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage
Receiver Input Thresholds
Supply Current vs Data Rate
10
8
45
40
35
30
25
20
15
10
5
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
R
L
= 3k
OUTPUT HIGH
= 5V
V
= 5V
CC
R
= 3k
L
L
V
CC
C
= 2500pF
6
INPUT HIGH
3 DRIVERS ACTIVE
V
= 4.5V
CC
4
2
0
INPUT LOW
–2
–4
–6
–8
OUTPUT LOW
= 4.5V
V
CC
V
= 5V
50
CC
0
30
75
DATA RATE (k BAUD)
0
10
20
40
60
70
30
TEMPERATURE (°C)
0
25
50
100 125 150 175
0
10
20
40
50
60
70
TEMPERATURE (°C)
1337 G01
1337 G03
1337 G02
3
LTC1337
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Driver Leakage in SHUTDOWN
VCC Supply Current
Driver Short-Circuit Current
45
40
35
30
25
20
15
10
5
20
16
14
12
10
8
20
18
16
14
12
10
8
3 DRIVERS LOADED
R
L
= 3k
–
V
OUT
= –20V
I
I
SC
1 DRIVER LOADED
+
6
SC
R
L
= 3k
4
6
V
= 20V
50
OUT
2
4
0
0
2
30
0
10
20
40
60
70
30
TEMPERATURE (°C)
30
TEMPERATURE (°C)
0
10
20
40
50
60
70
0
10
20
40
50
60
70
TEMPERATURE (°C)
1337 G05
1337 G04
1337 G06
Driver Output Waveforms
Receiver Short-Circuit Current
Receiver Output Waveforms
55
50
45
40
35
30
25
20
15
10
DRIVER
OUTPUT
RX
OUTPUT
L = 50pF
R
L = 3k
C
L = 2500pF
–
I
C
SC
DRIVER
OUTPUT
R
L = 3k
INPUT
+
I
INPUT
SC
30
0
10
20
40
50
60
70
TEMPERATURE (°C)
1337 G07
U
U
U
PI FU CTIO S
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.
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.
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.
V+: Positive Supply Output (RS232 Drivers). V+ 2VCC
1V. This pin requires an external capacitor C = 0.1µF for
chargestorage. Thecapacitormaybetiedtogroundor5V.
With multiple devices, the V + and V– pins may be paral-
–
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 SHUT-
DOWNmodeorVCC =0V. Thedriveroutputsareprotected
against ESD to ±10kV for human body model discharges.
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.
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
V
0V
+
V
CC
RX
OUTPUT
DRIVER
OUTPUT
0V
0V
0V
0.8V
–
V
0V
t
t
t
LHR
t
LHD
HLR
HLD
1337 F02
1337 F01
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
TEST CIRCUITS
ESD Test Circuit
DRIVER
OUTPUT
DRIVER
DRIVER
INPUT
–
+
V
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
V
51pF
3k
LTC1337
C1
0.1µF
C4
0.1µF
CC
C3
0.1µF
3
C2
0.1µF
1337 F03
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
DRIVER 2 OUT
RX2 IN
8
LINE PINS
PROTECTED
TO ±10kV
9
RX
RX3 IN
OUTPUT
10
11
12
13
14
RX4 IN
RX IN
RX
DRIVER 3 OUT
RX5 IN
51pF
ON/OFF
1337 F04
1337 TC01
Figure 4. Receiver Timing Test Load
5
LTC1337
TYPICAL APPLICATI S
U
O
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
25
24
23
22
21
20
19
18
17
16
15
V
+
LTC1337
+
C2
0.1µF
0.1µF
5V V
+
0.1µF
CC
+
MOUSE
C1
3
–
C2
0.1µF
DRIVER IN
RX OUT
DRIVER IN
RX OUT
RX OUT
RX OUT
DRIVER IN
RX OUT
GND
4
–
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
ON/OFF
(9)
(5)
1137 TA04
DB9
6
LTC1337
U
Dimensions in inches (millimeters) unless otherwise notes.
G Package
PACKAGE DESCRIPTIO
28-Lead SSOP
0.397 – 0.407
(10.07 – 10.33)
0.205 – 0.212
(5.20 – 5.38)
0.066 – 0.070
(1.68 – 1.78)
0.068 – 0.078
(1.73 – 1.99)
28 27 26 25 24 23 22 21 20 19 18
16 15
17
PARTING
LINE
0° – 8°
0.301 – 0.311
(7.65 – 7.90)
0.045
(1.14)
0.0256
(0.65)
BSC
0.022 – 0.037
(0.55 – 0.95)
0.005 – 0.009
(0.13 – 0.22)
0.002 – 0.008
(0.05 – 0.21)
0.010 – 0.015
(0.25 – 0.38)
5
7
8
1
2
3
4
6
9 10 11 12 13 14
0.045
(1.14)
N Package
28-Lead Plastic DIP
1.455
(36.957)
MAX
0.070
(1.778)
TYP
0.020
(0.508)
TYP
0.600 – 0.625
(15.240 – 15.875)
0.130 ± 0.005
(3.302 ± 0.127)
0.045 – 0.055
(1.143 – 1.651)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
0.020
(0.508)
MIN
0.505 – 0.560
(12.827 – 14.224)
95° ± 5°
0.009 – 0.015
(0.229 – 0.381)
+0.025
0.125
(3.175)
MIN
0.035 – 0.080
(0.889 – 2.032)
0.100 ± 0.010
(2.540 ± 0.254)
0.625
0.018 ± 0.003
(0.457 ± 0.076)
–0.015
+0.635
1
2
3
5
7
9
4
6
8
10 11 12 13 14
15.87
)
(
–0.381
S Package
28-Lead SOL
0.697 – 0.712
(17.70 – 18.08)
28 27 26 25 24 23 22 21 20 19 18
0.291 – 0.299
(7.391 – 7.595)
0.037 – 0.045
(0.940 – 1.143)
16 15
17
0.093 – 0.104
(2.362 – 2.642)
0.005
0.010 – 0.029
(0.254 – 0.737)
× 45°
(0.127)
RAD MIN
0° – 8° TYP
SEE
NOTE
0.050
(1.270)
TYP
0.394 – 0.419
(10.007 – 10.643)
0.014 – 0.019
(0.356 – 0.482)
0.009 – 0.013
(0.229 – 0.330)
0.004 – 0.012
(0.102 – 0.305)
SEE NOTE
0.016 – 0.050
(0.406 – 1.270)
NOTE:
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.
2
3
5
7
8
9 10 11 12 13 14
1
4
6
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.S. Area Sales Offices
SOUTHEAST REGION
Linear Technology Corporation
17060 Dallas Parkway
Suite 208
Dallas, TX 75248
Phone: (214) 733-3071
FAX: (214) 380-5138
SOUTHWEST REGION
Linear Technology Corporation
22141 Ventura Blvd.
NORTHEAST REGION
Linear Technology Corporation
One Oxford Valley
2300 E. Lincoln Hwy.,Suite 306
Langhorne, PA 19047
Suite 206
Woodland Hills, CA 91364
Phone: (818) 703-0835
FAX: (818) 703-0517
Phone: (215) 757-8578
FAX: (215) 757-5631
CENTRAL REGION
Linear Technology Corporation
Chesapeake Square
NORTHWEST REGION
Linear Technology Corporation
782 Sycamore Dr.
Linear Technology Corporation
266 Lowell St., Suite B-8
Wilmington, MA 01887
229 Mitchell Court, Suite A-25
Addison, IL 60101
Phone: (708) 620-6910
FAX: (708) 620-6977
Milpitas, CA 95035
Phone: (408) 428-2050
FAX: (408) 432-6331
Phone: (508) 658-3881
FAX: (508) 658-2701
International Sales Offices
KOREA
TAIWAN
FRANCE
Linear Technology Korea Branch
Namsong Building, #505
Itaewon-Dong 260-199
Yongsan-Ku, Seoul
Korea
Linear Technology Corporation
Rm. 801, No. 46, Sec. 2
Chung Shan N. Rd.
Taipei, Taiwan, R.O.C.
Phone: 886-2-521-7575
FAX: 886-2-562-2285
Linear Technology S.A.R.L.
Immeuble "Le Quartz"
58 Chemin de la Justice
92290 Chatenay Malabry
France
Phone: 82-2-792-1617
FAX: 82-2-792-1619
Phone: 33-1-41079555
FAX: 33-1-46314613
UNITED KINGDOM
SINGAPORE
Linear Technology (UK) Ltd.
The Coliseum, Riverside Way
Camberley, Surrey GU15 3YL
United Kingdom
Phone: 44-276-677676
FAX: 44-276-64851
GERMANY
Linear Techonolgy GMBH Untere
Hauptstr. 9
D-85386 Eching
Germany
Linear Technology Pte. Ltd.
101 Boon Keng Road
#02-15 Kallang Ind. Estates
Singapore 1233
Phone: 65-293-5322
FAX: 65-292-0398
Phone: 49-89-3197410
FAX: 49-89-3194821
JAPAN
Linear Technology KK
5F YZ Bldg.
Iidabashi, Chiyoda-Ku
Tokyo, 102 Japan
Phone: 81-3-3237-7891
FAX: 81-3-3237-8010
World Headquarters
Linear Technology Corporation
1630 McCarthy Blvd.
Milpitas, CA 95035-7487
Phone: (408) 432-1900
FAX: (408) 434-0507
LT/GP 0893 10K REV 0 • 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 TELEX: 499-3977
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