View LTC1383IN_4297373.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LTC1383 5V Low Power RS232 Transceiver
FEATURES

DESCRIPTIO
Operates from a Single 5V Supply Low Supply Current: ICC = 220A ESD Protection Over 10kV Available in 16-Pin SOIC Narrow Package Uses Small Capacitors: 0.1F Operates to 120kBaud Output Overvoltage Does Not Force Current Back into Supplies RS232 I/O Lines Can Be Forced to 25V Without Damage Pin Compatible with LT1181A and MAX232A
The LTC(R)1383 is an ultra-low power 2-driver/2-receiver RS232 transceiver that operates from a single 5V supply. The charge pump requires only four spacesaving 0.1F capacitors. The supply current (ICC) of the transceiver is only 220A with driver outputs unloaded. The LTC1383 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120kbaud with a 2500pF, 3k load. Both driver outputs and receiver inputs can be forced to 25V without damage and can survive multiple 10kV ESD strikes.
APPLICATIO S

Notebook Computers Palmtop Computers
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Quiescent Supply Current vs Temperature
1 0.1F 3 4 0.1F 5 11 VCC 300k LOGIC INPUT LOGIC OUTPUT 10 12 5k 9 5k 8 15 7 13 232 OUTPUT 232 INPUT LTC1383 VCC 300k 14 16 2 6 0.1F 0.1F
600
VCC = 5V
TEST CONDITION: VCC = 5V 500 QUIESCENT CURRENT (A) 400 300 200 100 0 -20 QUIESCENT CURRENT
LOGIC INPUT
232 OUTPUT
0
LOGIC OUTPUT
232 INPUT
LTC1383 * TA01
U
20 40 TEMPERATURE (C) 60 80
LTC1383 * TA02
U
U
1383fa
1
LTC1383
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW C1+ V+ C1- C2+ C2 - V- TR2 OUT RX2 IN 1 2 3 4 5 6 7 8 16 VCC 15 GND 14 TR1 OUT 13 RX1 IN 12 RX1 OUT 11 TR1 IN 10 TR2 IN 9 RX2 OUT
Supply Voltage (VCC) ................................................ 6V 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 LTC1383C ............................................... 0C to 70C LTC1383I ............................................ - 40C to 85C Storage Temperature Range ................ - 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C
ORDER PART NUMBER LTC1383CN LTC1383CS LTC1383IN LTC1383IS
N PACKAGE 16-LEAD PDIP
S PACKAGE 16-LEAD PLASTIC SO
TJMAX = 125C, JA = 70C/W (N) TJMAX = 125C, JA = 90C/W (S)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS
PARAMETER Any Driver Output Voltage Swing 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 CONDITIONS 3k to GND
The denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1F, unless noted.
MIN Positive Negative

TYP 7.0 - 6.5 1.4 1.4 - 20 12 1.3 1.7 0.4 5 0.2 3.2 - 40 20 8.0 7.5 - 8.0 - 7.0
MAX
UNITS V V V V A A mA V V V k V V mA mA V V V V
5.0 - 5.0 2.0
Input Low Level (VOUT = High) Input High Level (VOUT = Low) VIN = VCC VIN = 0V VOUT = 0V Input Low Threshold Input High Threshold - 10V VIN 10V Output Low, IOUT = - 1.6mA (VCC = 5V) Output High, IOUT = 160A (VCC = 5V) Sinking Current, VOUT = VCC Sourcing Current VOUT = 0V IOUT = 0mA IOUT = 8mA IOUT = 0mA IOUT = - 8mA
0.8 5 - 40
9

0.8 0.1 3 3.0 - 15 10
2.4 1 7 0.4
1383fa
2
U
W
U
U
WW
W
LTC1383
DC ELECTRICAL CHARACTERISTICS
PARAMETER Power Supply VCC Supply Current Digital Input Threshold Low Digital Input Threshold High CONDITIONS
The denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1F, unless noted.
MIN

TYP 0.22 0.35 1.4 1.4
MAX 0.5 1.0 0.8
UNITS mA mA V V
No Load (Note 2), 0C to 70C No Load (Note 2), - 40C to 85C
2.0
AC CHARACTERISTICS
PARAMETER Slew Rate Driver Propagation Delay (TTL to RS232) Receiver Propagation Delay (RS232 to TTL)
The denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1F, unless noted.
CONDITIONS RL = 3k, CL = 51pF RL = 3k, CL = 2500pF t HLD (Figure 1) t LHD (Figure 1) t HLR (Figure 2) t LHR (Figure 2) MIN 3

TYP 8 5 2 2 0.3 0.3
MAX 30 3.5 3.5 0.8 0.8
UNITS V/s V/s s s s s
Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired.
Note 2: Supply current is measured with driver and receiver outputs unloaded.
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Output Voltage vs Temperature
10 8 RL = 3k
OUTPUT HIGH VCC = 5V
DRIVER OUTPUT VOLTAGE (V)
THRESHOLD VOLTAGE (V)
4 2 0 -2 -4 -6 -8 0 10 20 30 40 50 TEMPERATURE (C) 60 70 OUTPUT LOW VCC = 4.5V VCC = 5V
SUPPLY CURRENT (mA)
6
VCC = 4.5V
LTC1383 * TPC01
UW
Receiver Input Thresholds vs Temperature
2.2 2.0 VTH 1.8 1.6 1.4 1.2
5 35 30 25 20 15 10 45 40
Supply Current vs Data Rate
VCC = 5V RL = 3k CL = 2500pF 2 DRIVERS ACTIVE
VTL
1.0 0 10 40 30 50 20 TEMPERATURE (C) 60 70
0 0 25 50 75 100 125 DATA RATE (kBAUD) 150 175
LTC1383 * TPC02
LTC1383 * TPC03
1383fa
3
LTC1383 TYPICAL PERFOR A CE CHARACTERISTICS
VCC Supply Current vs Temperature
18 16
SUPPLY CURRENT (mA)
14 12 10 8 6 4 1 DRIVER LOADED RL = 3k 2 DRIVERS LOADED RL = 3k
2 0 0 10 20 30 40 50 TEMPERATURE (C) 60 70
LTC1383 * TPC04
PI FU CTIO S
VCC: 5V Input Supply Pin. This pin should be decoupled with a 0.1F ceramic capacitor. GND: Ground Pin. V +: Positive Supply Output (RS232 Drivers). V + 2V
CC -
2V. This pin requires an external capacitor C = 0.1F 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 -: Negative Supply Output (RS232 Drivers). V - - (2VCC - 2V). This pin requires an external capacitor C = 0.1F for charge storage. C1+, C1-, C2+, C2-: Commutating Capacitor Inputs. These pins require two external capacitors C = 0.1F: one from C1+ to C1- and another from C2+ to C2 -. To maintain
4
UW
Driver Output Waveforms
DRIVER OUTPUT RL = 3k CL = 2500pF DRIVER OUTPUT RL = 3k INPUT
Receiver Output Waveforms
RECEIVER OUTPUT CL = 51pF
INPUT
LTC1383 * TPC05
LTC1383 * TPC06
5s/DIV
5s/DIV
U
U
U
charge pump efficiency, the capacitor's effective series resistance should be less than 2. TR IN: RS232 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. TR OUT: Driver Outputs at RS232 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.
1383fa
LTC1383
SWITCHI G TI E WAVEFOR S
DRIVER INPUT DRIVER OUTPUT t LHD VCC 1.4V 1.4V 0V V+ 0V t HLD
LTC1383 * F01
Figure 1. Driver Propagation Delay Timing
TEST CIRCUITS
Driver Timing Test Load
DRIVER OUTPUT DRIVER 51pF 3k
DRIVER INPUT
LTC1383 * TA03
0.1F
0.1F
LOGIC INPUT
LOGIC INPUT LOGIC OUTPUT
LOGIC OUTPUT
W
W
U
RX INPUT RX OUTPUT t LHR
1.7V
VCC 1.3V 0V 2.4V 0.8V t HLR VCC 0V
LTC1383 * F02
0V
V-
Figure 2. Receiver Propagation Delay Timing
Receiver Timing Test Load
RX OUTPUT RX INPUT RX 51pF
LTC1383 * TA04
ESD Test Circuit
1 3 4 5 11 VCC 300k 10 12 5k 9 5k 8 15 7 13 232 OUTPUT 232 INPUT RS232 LINE PINS PROTECTED TO 10kV LTC1383 VCC 300k 14 16 2 6 0.1F 0.1F VCC
232 OUTPUT
232 INPUT
LTC1383 * TA05
1383fa
5
LTC1383
TYPICAL APPLICATIO S
Paralleling Power Supply Generator with Common Storage Capacitors
1 0.1F 3 4 0.1F 5 11 VCC 300k LOGIC INPUT LOGIC OUTPUT 10 12 5k 9 5k LTC1383 VCC 300k
LOGIC INPUT
LOGIC OUTPUT
6
U
16 2 6
VCC = 5V 0.1F 0.1F
1 0.1F 3 4 0.1F 5 11 VCC 300k LTC1383 VCC 300k
16 2 6
VCC = 5V
14
232 OUTPUT
LOGIC INPUT
14
232 OUTPUT
7 13
232 OUTPUT 232 INPUT
LOGIC INPUT LOGIC OUTPUT
10 12 5k 9 5k
7 13
232 OUTPUT 232 INPUT
8 15
232 INPUT
LOGIC OUTPUT
8 15
232 INPUT
LTC1383 * TA06
1383fa
LTC1383
PACKAGE DESCRIPTIO
.300 - .325 (7.620 - 8.255)
.008 - .015 (0.203 - 0.381) +.035 .325 -.015 +0.889 8.255 -0.381
(
)
INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
NOTE: 1. DIMENSIONS ARE
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.
U
N Package 16-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.770* (19.558) MAX 16 15 14 13 12 11 10 9 .255 .015* (6.477 0.381) 1 2 3 4 5 6 7 8 .130 .005 (3.302 0.127) .020 (0.508) MIN .045 - .065 (1.143 - 1.651) .065 (1.651) TYP .120 (3.048) MIN .100 (2.54) BSC .018 .003 (0.457 0.076)
N16 1002
1383fa
7
LTC1383
PACKAGE DESCRIPTIO
.045 .005 .050 BSC N 16 15 14
.245 MIN
1 .030 .005 TYP
2
3
N/2
RECOMMENDED SOLDER PAD LAYOUT 1
.010 - .020 x 45 (0.254 - 0.508)
.008 - .010 (0.203 - 0.254)
0 - 8 TYP
.016 - .050 (0.406 - 1.270)
NOTE: 1. DIMENSIONS IN
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
RELATED PARTS
PART NUMBER LT1780/LT1781 LTC1382 LTC1384 LTC1385 LTC1386 DESCRIPTION 5V, 2 Driver, 2 Receiver RS232 Transeivers 5V, 2 Driver, 2 Receiver RS232 Transceiver 5V, 2 Driver, 2 Receiver RS232 Transceiver 3.3V, 2 Driver, 2 Receiver RS562 Transceiver 3.3V, 2 Driver, 2 Receiver RS562 Transceiver COMMENTS 15kV ESD per IEC 1000-4 220A Supply Current, 0.2A in Shutdown 220A Supply Current, 2 Receivers Active in Shutdown 220A Supply Current, 2 Receivers Active in Shutdown 220A Supply Current, Narrow 16-pin SO
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 FAX: (408) 434-0507 linear.com
U
S Package 16-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.386 - .394 (9.804 - 10.008) NOTE 3 13 12 11 10 9 N .160 .005 .228 - .244 (5.791 - 6.197) N/2 .150 - .157 (3.810 - 3.988) NOTE 3 2 3 4 5 6 7 8 .053 - .069 (1.346 - 1.752) .004 - .010 (0.101 - 0.254) .014 - .019 (0.355 - 0.483) TYP .050 (1.270) BSC
S16 0502
1383fa LW/TP 1002 1K REV A * PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1994

▲Up To Search▲

Price & Availability of LTC1383IN

	To Download LTC1383IN Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .