LINER LTC1386CN

LTC1386
3.3V Low Power
EIA/TIA562 Transceiver
U
DESCRIPTIO
FEATURES
■
■
■
■
■
■
■
■
■
Operates from a Single 3.3V Supply
Low Supply Current: ICC = 200µA
ESD Protection Over ±10kV
Available in 16-Pin SOIC Narrow Package
Uses Small Capacitors: 0.1µF
Operates to 120kBaud
Output Overvoltage Does Not Force Current
Back into Supplies
EIA/TIA562 I/O Lines Can Be Forced to ±25V
Without Damage
Pin Compatible with LT1181A
The LTC1386 is an ultra-low power 2-driver/2-receiver
EIA/TIA562 transceiver that operates from a single
3.3V supply. The charge pump requires only four
space-saving 0.1µF capacitors. The supply current
(ICC) of the transceiver is only 200µA with driver outputs unloaded.
The LTC1386 is fully compliant with all data rate and
overvoltage EIA/TIA562 specifications. The transceiver
can operate up to 120kbaud 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.
UO
APPLICATI
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Notebook Computers
Palmtop Computers
UO
■
S
TYPICAL APPLICATI
Quiescent Supply Current vs Temperature
16
3
2
4
0.1µF
LOGIC INPUT
5
LTC1386
600
500
0.1µF
6
0.1µF
VCC
300k
11
14
562 OUTPUT
VCC
300k
LOGIC INPUT
LOGIC OUTPUT
LOGIC OUTPUT
10
7
12
13
5k
9
562 OUTPUT
400
QUIESCENT
CURRENT
300
200
100
562 INPUT
0
–20
8
5k
TEST CONDITION: VCC = 3.3V
VCC = 3.3V
QUIESCENT CURRENT (µA)
0.1µF
1
562 INPUT
0
20
40
TEMPERATURE (°C)
60
80
LTC1386 • TA02
15
LTC1386 • TA01
1
LTC1386
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RATI GS
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AXI U
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ABSOLUTE
PACKAGE/ORDER I FOR ATIO
Supply Voltage (VCC) ................................................ 5V
Input Voltage
Driver ....................................... – 0.3V to V CC + 0.3V
Receiver ............................................... – 25V to 25V
Digital Input ............................... – 0.3V to VCC + 0.3V
Output Voltage
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 .................... 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
TOP VIEW
C1+
1
16 VCC
V+
2
15 GND
C1–
3
14 TR1 OUT
C2+
4
13 RX1 IN
C2 –
5
12 RX1 OUT
V–
6
11 TR1 IN
TR2 OUT
7
10 TR2 IN
RX2 IN
8
9
N PACKAGE
16-LEAD PLASTIC DIP
LTC1386CN
LTC1386CS
RX2 OUT
S PACKAGE
16-LEAD NARROW
PLASTIC SOIC
TJMAX = 125°C, θJA = 65°C/W (N)
TJMAX = 125°C, θJA = 95°C/W (S)
Consult factory for Industrial and Military grade parts.
DC ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
Any Driver
Output Voltage Swing
3k to GND
Logic Input Voltage Level
Logic Input Current
Output Short-Circuit Current
Any Receiver
Input Voltage Thresholds
Hysteresis
Input Resistance
Output Voltage
Output Short-Circuit Current
Power Supply Generator
V + Output Voltage
V – Output Voltage
Power Supply
VCC Supply Current
2
VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
MIN
TYP
●
●
3.7
– 3.7
Input Low Level (VOUT = High)
Input High Level (VOUT = Low)
VIN = VCC
VIN = 0V
VOUT = 0V
●
●
2.0
4.5
– 4.5
1.4
1.4
Input Low Threshold
Input High Threshold
●
●
0.8
●
0.1
3
– 10V ≤ VIN ≤ 10V
Output Low, IOUT = – 1.6mA (VCC = 3.3V)
Output High, IOUT = 160µA (VCC = 3.3V)
Sinking Current, VOUT = VCC
Sourcing Current, VOUT = GND
Positive
Negative
●
●
●
●
IOUT = 0mA
IOUT = 5mA
IOUT = 0mA
IOUT = – 5mA
No Load (Note 2)
– 20
±10
3.0
–5
2
1.3
1.7
0.4
5
0.2
3.2
– 20
7
MAX
0.8
5
– 40
2.4
1
7
0.4
5.7
5.5
– 5.3
– 5.0
●
0.2
UNITS
V
V
V
V
µA
µA
mA
V
V
V
kΩ
V
V
mA
mA
V
V
V
V
0.5
mA
LTC1386
AC CHARACTERISTICS
PARAMETER
Slew Rate
VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless otherwise noted.
CONDITIONS
RL = 3k, CL = 51pF
RL = 3k, CL = 1000pF
t HLD (Figure 1)
t LHD (Figure 1)
t HLR (Figure 2)
t LHR (Figure 2)
Driver Propagation Delay
(TTL to EIA/TIA562)
Receiver Propagation Delay
(EIA/TIA562 to TTL )
MIN
3
●
●
●
●
The ● denotes specifications which apply over the operating temperature
range of 0°C ≤ TA ≤ 70°C.
Note 1: Absolute maximum ratings are those values beyond which the life
of the device may be impaired.
TYP
8
5
2
2
0.3
0.3
MAX
30
UNITS
V/µs
V/µs
µs
µs
µs
µs
3.5
3.5
0.8
0.8
Note 2: Supply current is measured with driver and receiver outputs
unloaded.
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TYPICAL PERFORMANCE CHARACTERISTICS
Driver Output Voltage
vs Temperature
Receiver Input Thresholds
vs Temperature
5
OUTPUT HIGH
VCC = 3.3V
1
ALL DRIVERS WITH LOAD
RL = 3k
–1
–2
OUTPUT LOW
VCC = 3.3V
–3
–4
10
40
30
20
50
TEMPERATURE (°C)
1.8
VTH+
1.6
1.4
VTH–
60
70
0
10
40
50
30
20
TEMPERATURE (˚C)
60
70
2 DRIVERS LOADED
RL = 3k
40
80 100
60
DATA RATE (kBAUD)
120
140
LTC1386 • TPC03
RECEIVER
OUTPUT
CL = 51pF
DRIVER
OUTPUT
RL = 3k
2.5
20
Receiver Output Waveforms
DRIVER
OUTPUT
RL = 3k
CL = 1000pF
4.0
1 DRIVER LOADED
RL = 3k
1.5
0
Driver Output Waveforms
4.5
2.0
5
LTC1386 • TPC02
VCC Supply Current
vs Temperature
3.0
10
0
1.0
LTC1386 • TPC01
3.5
15
1.2
–5
0
VCC = 3.3V
RL = 3k
CL = 2500pF
ALL DRIVERS ACTIVE
2.0
2
0
20
SUPPLY CURRENT (mA)
3
THRESHOLD VOLTAGE (V)
DRIVER OUTPUT VOLTAGE (V)
4
SUPPLY CURRENT (mA)
Supply Current vs Data Rate
2.2
INPUT
INPUT
1.0
LTC1386 • TPC05
LTC1386 • TPC06
0.5
0
0
10
20
30
40
50
TEMPERATURE (°C)
60
70
LTC1386 • TPC04
3
LTC1386
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PI FU CTIO S
VCC: 3.3V Input Supply Pin. This pin should be decoupled
with a 0.1µF ceramic capacitor.
charge pump efficiency, the capacitor’s effective series
resistance should be less than 2Ω.
GND: Ground Pin.
TR IN: EIA/TIA562 Driver Input Pins. Inputs are TTL/
CMOS compatible. The inputs of unused drivers can be left
unconnected since 300k input pull-up resistors to VCC are
included on chip.
Positive Supply Output (EIA/TIA562 Drivers).
≅
2VCC – 1V. This pin requires an external capacitor C =
0.1µF for charge storage. The capacitor may be tied to
ground or VCC. With multiple devices, the V + and V – pins
may share a common capacitor. For large numbers of
devices, increasing the size of the shared common storage
capacitors is recommended to reduce ripple.
V +:
V+
V –: Negative Supply Output (RS232 Drivers). V – ≅ – (2VCC
– 1.3V). This pin requires an external capacitor C = 0.1µF
for charge storage.
C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. These
pins require two external capacitors C = 0.1µF: one from
C1+ to C1– and another from C2+ to C2 –. To maintain
TR OUT: Driver Outputs at EIA/TIA562 Voltage Levels.
The driver outputs are protected against ESD to ±10kV for
human body model discharges.
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
Levels.
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SWITCHI G TI E WAVEFOR S
DRIVER
INPUT
VCC
1.4V
1.4V
0V
V+
DRIVER
OUTPUT
0V
0V
t LHD
V–
RX
OUTPUT
1.3V
0V
2.4V
0.8V
t LHR
t HLD
VCC
1.7V
RX
INPUT
t HLR
LTC1386 • F01
Figure 1. Driver Propagation Delay Timing
4
VCC
0V
LTC1386 • F02
Figure 2. Receiver Propagation Delay Timing
LTC1386
TEST CIRCUITS
Receiver Timing Test Load
Driver Timing Test Load
DRIVER
INPUT
DRIVER
OUTPUT
RX
OUTPUT
RX INPUT
DRIVER
51pF
RX
51pF
3k
LTC1386 • TA04
LTC1386 • TA03
ESD Test Circuit
16
1
0.1µF
LTC1386
3
LOGIC INPUT
5 VCC
LOGIC OUTPUT
LOGIC OUTPUT
0.1µF
300k
14
11
VCC
LOGIC INPUT
0.1µF
562 OUTPUT
300k
10
7
12
13
9
VCC
6
4
0.1µF
2
5k
5k
8
562 OUTPUT
562 INPUT
RS562
LINE PINS
PROTECTED
TO ±10kV
562 INPUT
15
1386 TA05
5
LTC1386
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TYPICAL APPLICATIONS N
Paralleling Power Supply Generator
with Common Storage Capacitors
0.1µF
1
16
3
2
4
0.1µF
LOGIC INPUT
5
LTC1386
VCC = 3.3V
0.1µF
6
0.1µF
VCC
300k
11
14
0.1µF
562 OUTPUT
1
16
3
2
4
0.1µF
LOGIC INPUT
5
LOGIC OUTPUT
LOGIC OUTPUT
14
562 OUTPUT
VCC
300k
10
7
12
13
5k
9
8
5k
15
562 OUTPUT
LOGIC INPUT
562 INPUT
LOGIC OUTPUT
562 INPUT
LOGIC OUTPUT
10
7
12
13
5k
9
8
5k
LTC1386 • TA06
6
6
VCC
300k
11
VCC
300k
LOGIC INPUT
LTC1386
VCC = 3.3V
15
562 OUTPUT
562 INPUT
562 INPUT
LTC1386
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PACKAGE DESCRIPTION
Dimensions in inches (millimeters) unless otherwise noted.
N Package
16-Lead Plastic DIP
0.770
(19.558)
MAX
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
0.260 ± 0.010
(6.604 ± 0.254)
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
(
0.130 ± 0.005
(3.302 ± 0.127)
0.015
(0.381)
MIN
+0.025
0.325 –0.015
8.255
+0.635
–0.381
0.045 – 0.065
(1.143 – 1.651)
)
0.065
(1.651)
TYP
0.125
(3.175)
MIN
0.045 ± 0.015
(1.143 ± 0.381)
0.018 ± 0.003
(0.457 ± 0.076)
0.100 ± 0.010
(2.540 ± 0.254)
N16 0492
S Package
16-Lead Plastic SOIC
0.386 – 0.394*
(9.804 – 10.008)
16
15
14
13
12
11
10
9
0.150 – 0.157*
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
2
3
4
5
6
8
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0° – 8° TYP
0.016 – 0.050
0.406 – 1.270
7
0.014 – 0.019
(0.355 – 0.483)
0.050
(1.270)
TYP
SO16 0893
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
LTC1386
U.S. Area Sales Offices
NORTHEAST REGION
Linear Technology Corporation
One Oxford Valley
2300 E. Lincoln Hwy.,Suite 306
Langhorne, PA 19047
Phone: (215) 757-8578
FAX: (215) 757-5631
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.
Suite 206
Woodland Hills, CA 91364
Phone: (818) 703-0835
FAX: (818) 703-0517
Linear Technology Corporation
266 Lowell St., Suite B-8
Wilmington, MA 01887
Phone: (508) 658-3881
FAX: (508) 658-2701
CENTRAL REGION
Linear Technology Corporation
Chesapeake Square
229 Mitchell Court, Suite A-25
Addison, IL 60101
Phone: (708) 620-6910
FAX: (708) 620-6977
NORTHWEST REGION
Linear Technology Corporation
782 Sycamore Dr.
Milpitas, CA 95035
Phone: (408) 428-2050
FAX: (408) 432-6331
International Sales Offices
FRANCE
Linear Technology S.A.R.L.
Immeuble "Le Quartz"
58 Chemin de la Justice
92290 Chatenay Malabry
France
Phone: 33-1-41079555
FAX: 33-1-46314613
KOREA
Linear Technology Korea Branch
Namsong Building, #505
Itaewon-Dong 260-199
Yongsan-Ku, Seoul
Korea
Phone: 82-2-792-1617
FAX: 82-2-792-1619
TAIWAN
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
GERMANY
Linear Techonolgy GmbH
Untere Hauptstr. 9
D-85386 Eching
Germany
Phone: 49-89-3197410
FAX: 49-89-3194821
SINGAPORE
Linear Technology Pte. Ltd.
101 Boon Keng Road
#02-15 Kallang Ind. Estates
Singapore 1233
Phone: 65-293-5322
FAX: 65-292-0398
UNITED KINGDOM
Linear Technology (UK) Ltd.
The Coliseum, Riverside Way
Camberley, Surrey GU15 3YL
United Kingdom
Phone: 44-276-677676
FAX: 44-276-64851
JAPAN
Linear Technology KK
5F YZ Bldg.
4-4-12 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
0294
8
Linear Technology Corporation
LT/GP 0594 10K • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977
 LINEAR TECHNOLOGY CORPORATION 1994