LTC1385CG#PBF [Linear]
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: SSOP; Pins: 20; Temperature Range: 0°C to 70°C;
| 型号： | LTC1385CG#PBF |
| 厂家： | 
Linear |
| 描述： | LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: SSOP; Pins: 20; Temperature Range: 0°C to 70°C 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总8页 (文件大小：205K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC1385
3.3V Low Power
EIA/TIA-562 Transceiver
U
FEATURES
DESCRIPTIO
The LTC®1385 is an ultra-low power, 2-driver/2-receiver
EIA/TIA-562 transceiver which operates from a single
3.3V supply. The charge pump requires only four space-
saving 0.1µF capacitors.
■
Operates from a Single 3.3V Supply
■
Low Supply Current: ICC = 200µA
■
ICC = 35µA in Driver Disable Mode
■
ICC = 0.2µA in Shutdown Mode
■
ESD Protection Over ±10kV
The transceiver operates in one of three modes: Normal,
Driver Disable or Shutdown. In the Normal mode, ICC is
only200µAintheunloadedcondition.IntheDriverDisable
mode, the charge pump is turned off, the driver outputs
are forced into three-state, both receivers are kept active,
and ICC drops to 35µA. In the Shutdown mode, everything
is turned off and ICC drops to 0.2µA.
■
Uses Small Capacitors: 0.1µF
■
Operates to 120kBaud
■
Output Overvoltage Does Not Force Current
Back into Supplies
■
EIA/TIA-562 I/O Lines Can Be Forced to ±25V
Without Damage
■
Pin Compatible with LT1180A
The LTC1385 is fully compliant with all data rate and
overvoltage EIA/TIA-562 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.
U
APPLICATIO S
■
Notebook Computers
Palmtop Computers
■
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
TYPICAL APPLICATIO
2-Drivers/2-Receivers with Shutdown
and Driver Disable
Quiescent and Shutdown Supply Current
vs Temperature
1.2
1.0
0.8
0.6
0.4
0.2
0
600
500
400
300
200
100
0
17
3
2
4
5
6
V
= 3.3V
CC
LTC1385
0.1µF
7
0.1µF
V
V
CC
CC
0.1µF
0.1µF
300k
12
15
LOGIC INPUT
562 OUTPUT
QUIESCENT
CURRENT
300k
11
13
8
562 OUTPUT
562 INPUT
LOGIC INPUT
14
LOGIC OUTPUT
SHUTDOWN
CURRENT
5k
5k
10
18
9
562 INPUT
LOGIC OUTPUT
ON/OFF
–20
0
20
40
60
80
16
TEMPERATURE (°C)
TEST CONDITION: V = 3.3V
CC
1
LTC1385 • TA02
LTC1385 • TA01
DRIVER DISABLE
sn1385 1385fas
1
LTC1385
W W
U W
ABSOLUTE AXI U RATI GS
Supply Voltage (VCC) ................................................ 5V
Input Voltage
Short-Circuit Duration
V+ ................................................................... 30 sec
V– ................................................................... 30 sec
Driver Output.............................................. Indefinite
Receiver Output.......................................... Indefinite
Operating Temperature Range
LTC1385C ............................................. 0°C to 70°C
LTC1385I........................................... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Driver ....................................... –0.3V to VCC + 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
U W
U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ORDER PART
ORDER PART
TOP VIEW
DRIVER
NUMBER
NUMBER
1
2
3
4
5
6
7
8
9
ON/OFF
VCC
20
19
18
17
16
15
14
13
12
11
DISABLE
DRIVER
1
2
3
4
5
6
7
8
9
18 ON/OFF
+
DISABLE
C1
+
C1
17
16
15
14
13
12
11
10
V
CC
+
V
GND
LTC1385CG
LTC1385IG
+
LTC1385CN
LTC1385CSW
LTC1385IN
V
GND
–
C1
TR1 OUT
RX1 IN
RX1 OUT
TR1 IN
TR2 IN
RX2 OUT
NC
C1–
TR1 OUT
RX1 IN
RX1 OUT
TR1 IN
TR2 IN
RX2 OUT
+
C2
+
C2
–
C2
LTC1385ISW
C2–
V–
–
V
TR2 OUT
RX2 IN
TR2 OUT
RX2 IN
NC 10
N PACKAGE
18-LEAD PDIP
SW PACKAGE
18-LEAD PLASTIC SO
G PACKAGE
20-LEAD SSOP
TJMAX = 125°C, θJA = 135°C/W
TJMAX = 125°C, θJA = 85°C/W
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 = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, VON/OFF = VCC, Driver Disable = VCC, unless noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Any Driver
Output Voltage Swing
3k to GND
Positive
Negative
●
●
3.7
–3.7
4.5
– 4.5
V
V
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
mA
µA
OUT
2.0
OUT
V
V
= V
= 0V
●
●
5
–40
IN
IN
CC
–20
±10
±10
Output Short-Circuit Current
Output Leakage Current
V
= 0V
OUT
Shutdown or Driver Disable or V = 0V (Note 3,4),
●
±500
CC
V
= ±20V
OUT
sn1385 1385fas
2
LTC1385
DC ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating
temperature range. VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, VON/OFF = VCC, Driver Disable = VCC, unless noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Any Receiver
Input Voltage Thresholds
Input Low Threshold
Input High Threshold
●
●
0.8
1.3
1.7
0.4
5
0.2
3.2
V
V
V
kΩ
V
V
2.4
1.0
7
Hysteresis
Input Resistance
Output Voltage
●
0.1
3
–10V ≤ V ≤ 10V
IN
Output Low, I
Output High, I
= –1.6mA (V = 3.3V)
= 160µA (V = 3.3V)
●
●
0.4
OUT
CC
3.0
OUT
CC
Output Short-Circuit Current
Sinking Current, V
Sourcing Current, V
= V
–5
2
–20
7
mA
mA
OUT
CC
= 0V
OUT
Output Leakage Current
Shutdown (Note 4), 0V ≤ V
≤ V
●
1
10
µA
OUT
CC
Power Supply Generator
+
V Output Voltage
I
I
I
I
= 0mA
= 5mA
= 0mA
5.7
5.5
–5.3
–5.0
V
V
V
V
OUT
OUT
–
V Output Voltage
OUT
OUT
= –5mA
Supply Rise Time
Shutdown or Driver Disable to Turn-On
0.2
ms
Power Supply
V
Supply Current
No Load (Note 2), 0°C to 70°C
No Load (Note 2), – 40°C to 85°C
●
●
0.2
3.5
0.5
1.0
mA
mA
CC
Supply Leakage Current (V
)
CC
Shutdown (Note 4)
Driver Disable (Note 3)
●
●
0.2
35
10
50
µA
µA
Digital Input Threshold Low
Digital Input Threshold High
●
●
1.4
1.4
0.8
V
V
2.0
AC CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range.
VCC = 3.3V, C1 = C2 = C3 = C4 = 0.1µF, unless noted.
PARAMETER
CONDITIONS
R = 3k, C = 51pF
MIN
TYP
MAX
UNITS
Slew Rate
8
5
30
V/µs
V/µs
L
L
R = 3k, C = 1000pF
3
L
L
Driver Propagation Delay
(TTL to EIA/TIA-562)
t
t
(Figure 1)
(Figure 1)
●
●
2
2
3.5
3.5
µs
µs
HLD
LHD
Receiver Propagation Delay
(EIA/TIA-562 to TTL)
t
t
(Figure 2)
(Figure 2)
●
●
0.3
0.2
0.8
0.8
µs
µs
HLR
LHR
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 3: Measurements made in the Driver Disable mode are performed
with V = GND and V = V
.
CC
DRIVER DISABLE
ON/OFF
Note 2: Supply current is measured with driver and receiver outputs
unloaded.
Note 4: Measurements made in the Shutdown mode are performed with
V = 0V.
ON/OFF
sn1385 1385fas
3
LTC1385
TYPICAL PERFOR A CE CHARACTERISTICS
U W
Driver Output Voltage
vs Temperature
Receiver Input Thresholds
vs Temperature
Supply Current vs Data Rate
5
4
2.2
2.0
1.8
1.6
20
15
V
= 3.3V
CC
OUTPUT HIGH
R
= 3k
L
L
V
= 3.3V
CC
C
= 2500pF
3
ALL DRIVERS ACTIVE
2
+
1
V
V
TH
ALL DRIVERS WITH LOAD
= 3k
0
10
5
R
L
–1
–2
–3
–4
–5
1.4
1.2
1.0
–
TH
OUTPUT LOW
V
= 3.3V
CC
0
0
20
30
40
50
60
70
10
40
TEMPERATURE (˚C)
60
70
20
40
80 100 120 140
0
10
20
30
50
0
60
TEMPERATURE (°C)
DATA RATE (kBAUD)
LTC1385 • TPC01
LTC1385 • TPC02
LTC1385 • TPC03
VCC Supply Current
vs Temperature
Driver Leakage in Shutdown
vs Temperature
Driver Short-Circuit Current
vs Temperature
18
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
45
40
35
30
25
20
15
10
5
16
14
12
10
8
2 DRIVERS LOADED
= 3k
R
L
–
I
I
SC
V
= –20V
OUT
1 DRIVER LOADED
+
R
L
= 3k
SC
6
4
V
= 20V
50
OUT
40
2
0
0
0
0
10
30
40
50
70
30
20
60
0
10
20
30
70
0
10
20
60
70
40
50
60
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
LTC1385 • TPC06
LTC1385 • TPC04
LTC1385 • TPC05
Receiver Short-Circuit Current
vs Temperature
Driver Output Waveforms
Receiver Output Waveform
45
40
35
30
25
20
15
10
5
DRIVER
OUTPUT
RL = 3k
RECEIVER
OUTPUT
C
L = 1000pF
CL = 51pF
DRIVER
OUTPUT
RL = 3k
–
I
I
SC
INPUT
INPUT
+
SC
LTC1385 • TPC08
LTC1385 • TPC09
0
0
10
30
40
50
70
20
60
TEMPERATURE (°C)
LTC1385 • TPC06
sn1385 1385fas
4
LTC1385
U
U
U
PI FU CTIO S
VCC: 3.3V Input Supply Pin. This pin should be decoupled
with a 0.1µF ceramic capacitor.
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 2Ω.
GND: Ground Pin.
ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logic
low puts the device in the Shutdown mode independent
of the Driver Disable pin. The supply current drops to
0.2µA and all driver and receiver outputs are forced into
three-state.
TR IN: EIA/TIA-562 Driver Input Pins. Inputs are TTL/
CMOScompatible.Theinputsofunuseddriverscanbeleft
unconnected since 300k input pull-up resistors to VCC are
included on chip. To minimize power consumption, the
internaldriverpull-upresistorsaredisconnectedfromVCC
in the Shutdown mode.
DRIVER DISABLE: TTL/CMOS Compatible Input Pin. With
the ON/OFF pin held high, a logic low forces the part into
the Driver Disable mode with the charge pump turned off
and the driver outputs forced into three-state. Both receiv-
ers remain active and the supply current drops to 35µA. A
logic high forces the part into the Normal mode.
V+: Positive Supply Output (EIA/TIA-562 Drivers).
V+ 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 a large number
of devices, increasing the size of the shared common
storage capacitors is recommended to reduce ripple.
TR OUT: Driver Outputs at EIA/TIA-562 Voltage Levels.
Outputs are in a high impedance state when in the Shut-
down or Driver Disable mode or VCC = 0V. 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
withoutdamage. Thereceiverinputsareprotectedagainst
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 Lev-
els. Outputs are in a high impedance state when in the
Shutdown mode.
V–: Negative Supply Output (EIA/TIA-562 Drivers).
V – –(2VCC – 1.3V). This pin requires an external
capacitor C = 0.1µF for charge storage.
U
W
W
SWITCHI G TI E WAVEFOR S
V
V
CC
CC
1.7V
RX
DRIVER
1.3V
1.4V
1.4V
INPUT
INPUT
0V
0V
V
+
V
CC
DRIVER
OUTPUT
RX
OUTPUT
2.4V
0V
0V
–
0.8V
V
0V
t
t
t
t
LHD
LHR
HLD
HLR
1385 F01
1385 F02
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
sn1385 1385fas
5
LTC1385
TEST CIRCUITS
Driver Timing Test Load
Receiver Timing Test Load
RX
OUTPUT
DRIVER
OUTPUT
DRIVER
INPUT
RX INPUT
RX
DRIVER
51pF
51pF
3k
1385 F04
1385 F03
ESD Test Circuit
17
3
2
4
5
6
V
CC
LTC1385
0.1µF
7
0.1µF
V
CC
0.1µF
0.1µF
300k
12
15
LOGIC INPUT
S
562 OUTPUT
V
CC
300k
RS562
11
13
8
S
S
562 OUTPUT
562 INPUT
LOGIC INPUT
LINE PINS
PROTECTED
TO ±10kV
14
LOGIC OUTPUT
5k
5k
10
18
9
S
562 INPUT
LOGIC OUTPUT
ON/OFF
16
1
1385 F05
DRIVER DISABLE
sn1385 1385fas
6
LTC1385
U
PACKAGE DESCRIPTIO
G Package
20-Lead Plastic SSOP (5.3mm)
(Reference LTC DWG # 05-08-1640)
6.90 – 7.50*
(.272 – .295 )
1.25 ±0.12
20 19 18 17 16 15 14 13 12 11
7.8 – 8.2
5.3 – 5.7
7.40 – 8.20
(.291 – .323)
0.42 ±0.03
0.65 BSC
RECOMMENDED SOLDER PAD LAYOUT
5
7
1
2
3
4
6
8
9
10
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:
G20 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
N Package
18-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.900*
(22.860)
MAX
18
17
16
15
14
13
12
11
10
.255 ± .015*
(6.477 ± 0.381)
1
2
3
5
6
9
4
7
8
.300 – .325
(7.620 – 8.255)
.130 ± .005
(3.302 ± 0.127)
.045 – .065
(1.143 – 1.651)
.020
(0.508)
MIN
.065
(1.651)
TYP
.008 – .015
(0.203 – 0.381)
+.035
–.015
.325
.120
(3.048)
MIN
.018 ± .003
(0.457 ± 0.076)
.005
(0.127)
MIN
.100
(2.54)
BSC
+0.889
8.255
(
)
–0.381
NOTE:
INCHES
N18 1002
1. DIMENSIONS ARE
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
sn1385 1385fas
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However,noresponsibilityisassumedforitsuse.LinearTechnologyCorporationmakesnorepresenta-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
LTC1385
U
PACKAGE DESCRIPTIO
SW Package
18-Lead Plastic Small Outline (Wide .300 Inch)
(Reference LTC DWG # 05-08-1620)
.050 BSC .045 ±.005
.030 ±.005
TYP
.447 – .463
(11.354 – 11.760)
NOTE 4
N
14 13
11
15
12
10
18 17 16
N
.325 ±.005
.420
MIN
.394 – .419
(10.007 – 10.643)
NOTE 3
1
2
3
N/2
N/2
9
RECOMMENDED SOLDER PAD LAYOUT
.291 – .299
(7.391 – 7.595)
NOTE 4
2
3
5
7
8
1
4
6
.037 – .045
(0.940 – 1.143)
.093 – .104
(2.362 – 2.642)
.010 – .029
(0.254 – 0.737)
× 45°
.005
(0.127)
RAD MIN
0° – 8° TYP
.050
(1.270)
BSC
.004 – .012
.009 – .013
(0.102 – 0.305)
NOTE 3
(0.229 – 0.330)
.014 – .019
.016 – .050
(0.356 – 0.482)
TYP
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
INCHES
(MILLIMETERS)
S18 (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
LT1780/LT1781
LTC1327
DESCRIPTION
COMMENTS
±15kV ESD per IEC 1000-4
5V, 2 Driver, 2 Receiver RS232 Transceivers
3.3V, 3 Driver, 5 Receiver RS562 Transceiver
3.3V to 5V, 3 Driver, 5 Receiver RS232 Transceiver
5V, 2 Driver, 2 Receiver RS232 Transceiver
5V, 2 Driver, 2 Receiver RS232 Transceiver
5V, 2 Driver, 2 Receiver RS232 Transceiver
3.3V, 2 Driver, 2 Receiver RS562 Transceiver
300µA Supply Current, 0.2µA in Shutdown
True RS232 on 3.3V, 5 Receivers Active in Shutdown
200µA Supply Current, 0.2µA in Shutdown
200µA Supply Current, Narrow 16-Pin SO
LTC1348
LTC1382
LTC1383
LTC1384
200µA Supply Current, 2 Receivers Active in Shutdown
200µA Supply Current, Narrow 16-Pin SO
LTC1386
sn1385 1385fas
LW/TP 1002 1K REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
8
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 1994
相关型号：
LTC1385CG#TR
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: SSOP; Pins: 20; Temperature Range: 0°C to 70°C
Linear
LTC1385CG#TRPBF
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: SSOP; Pins: 20; Temperature Range: 0°C to 70°C
Linear
LTC1385CN#PBF
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: PDIP; Pins: 18; Temperature Range: 0°C to 70°C
Linear
LTC1385CSW#PBF
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: SO; Pins: 18; Temperature Range: 0°C to 70°C
Linear
LTC1385CSW#TRPBF
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: SO; Pins: 18; Temperature Range: 0°C to 70°C
Linear
LTC1385IN#PBF
LTC1385 - 3.3V Low Power EIA/TIA-562 Transceiver; Package: PDIP; Pins: 18; Temperature Range: -40°C to 85°C
Linear
©2020 ICPDF网 联系我们和版权申明