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1318 PDF даташит

Спецификация 1318 изготовлена ​​​​«Linear Technology» и имеет функцию, называемую «Single 5V RS232/RS422/AppleTalk DCE Transceiver».

Детали детали

Номер произв 1318
Описание Single 5V RS232/RS422/AppleTalk DCE Transceiver
Производители Linear Technology
логотип Linear Technology логотип 

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1318 Даташит, Описание, Даташиты
LTC1318
Single 5V
RS232/RS422/AppleTalk®
DCE Transceiver
FEATURES
s Single Chip Provides DCE RS232 or
RS422/AppleTalk DCE Port
s Operates from a Single 5V Supply
s Charge Pump Uses 0.1µF Capacitors
s Output Common-Mode Voltage Range Exceeds
Power Supply Rails for All Drivers
s Driver Outputs Are High Impedance with Power Off
s Pin Selectable RS232/RS422 Receiver
s Thermal Shutdown Protection
s Drivers Are Short-Circuit Protected
APPLICATIONS
s Dual-Mode RS232/RS422 Peripherals
s AppleTalk Peripherals
s Single 5V Systems
DESCRIPTION
The LTC®1318 is a single 5V, RS232/RS422 transceiver
for connection to the DCE, or peripheral side of an interface
link. It includes an on-board charge pump to generate a
±8V supply which allows true RS232 output swings. The
charge pump requires only four external 0.1µF capacitors.
The LTC1318 includes two RS232 drivers, a differential
RS422 driver, a dedicated RS232 receiver, and a pin
selectable RS232/RS422 receiver which can receive either
single-ended or differential signals.
The LTC1318 features driver outputs which can be taken
to common-mode voltages outside the power supply rails
without damage. Additionally, the driver outputs assume
a high impedance state when the power is shut off,
preventing externally applied signals from feeding back
into the power supplies. The RS232 devices will operate at
speeds up to 100kbaud. The RS422 devices will operate
up to 2Mbaud.
The LTC1318 is available in a 24-lead SO Wide package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
AppleTalk and LocalTalk are registered trademarks of Apple Computer, Inc.
TYPICAL APPLICATIONS
0.1µF
0.1µF
V+
C1+
C1
CHARGE
PUMP
RS232
LINES
RXI1 RS232
TXO1 RS232
TXO2 RS232
APPLETALK
NETWORK
1k 22
1k 22
22
22
5V VCC
22R X D + RS422
R X D /RXI2
22T X D +
RS232
T X D RS422
22
NC
LTC1318
22
LOCALTALK®
TRANSFORMER
100pF × 4
V
C2
C 2 + 0.1µF
RXO1
TXI1
TXI2
GND
RXDO/RXO2
TXD
RXMODE
GND
NC
0.1µF
TXD
(5V/DIV)
Driver Output Waveforms
TO
DIGITAL
SYSTEM
TXD+, TXD
(2V/DIV)
RXDO
(5V/DIV)
RL = 100
CL = 100pF
200ns/DIV
1318 TA02
LT1318 • TA01
1









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1318 Даташит, Описание, Даташиты
LTC1318
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage:
VCC ...................................................................................... 7V
V+ ................................................................................... 13.2V
V............................................................................... – 13.2V
Input Voltage:
All Drivers .............................. – 0.3 to (VCC + 0.3V)
All Receivers ...................................... – 25V to 25V
RXMODE Pin ....................... – 0.3V to (VCC + 0.3V)
Output Voltage:
RS232 Drivers ................ (V+ – 30V) to (V+ 30V)
RS422 Drivers ................................................ ±15V
All Receivers ........................ – 0.3V to (VCC + 0.3V)
Short-Circuit Duration:
V+ or Vto GND .......................................... 30 sec
Driver or Receiver Outputs ...................... Indefinite
Operating Temperature Range .................... 0°C to 70°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER INFORMATION
V+ 1
C1+ 2
C1– 3
RXI1 4
TXO1 5
TXO2 6
VCC 7
RXD+ 8
R X D /RXI2 9
T X D + 10
T X D 11
NC 12
TOP VIEW
24 V
23 C 2
22 C 2 +
21 RXO1
20 TXI1
19 TXI2
18 GND
17 RXDO/RXO2
16 TXD
15 RXMODE
14 GND
13 NC
SW PACKAGE
24-LEAD PLASTIC SO WIDE
ORDER PART
NUMBER
LTC1318CSW
TJMAX = 125°C, θJA = 85°C/W
Consult factory for Industrial and Military grade parts
ELECTRICAL CHARACTERISTICS
VS = 5V ±5%, C1 = C2 = 0.1µF, TA = 0°C to 70°C, unless otherwise specified. (Notes 2, 3)
SYMBOL PARAMETER
Supplies
CONDITIONS
ICC Supply Current
V+ Positive Charge Pump Output Voltage
VNegative Charge Pump Output Voltage
Differential Driver
VOD Differential Driver Output Voltage
DVOD
Change in Magnitude of Differential
Output Voltage
VOC Common-Mode Output Voltage
IDSS Short-Circuit Output Current
VIL Input Low Voltage
VIH Input High Voltage
Single-Ended Driver
VO Output Voltage Swing
IOSS Short-Circuit Output Current
VIL Input Low Voltage
VIH Input High Voltage
SR Output Slew Rate
No Load
IOUT = 0mA
IOUT = 10mA, VCC = 5V
IOUT = 0mA
IOUT = – 5mA, VCC = 5V
No Load (Figure 1)
RL = 100(Figure 1)
RL = 100(Figure 1)
RL = 100(Figure 1)
– 1V < VCMR < 7V
RL = 3k
VOUT = OV
RL = 3k, CL = 51pF
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN TYP MAX
9
7.8 8.8
6.8 7.4
–7.3 –8.6
– 6.3 –7.3
30
±4
±2
0.2
3
35 200
0.8
2.0
±5 7.3/–6.5
±5 17
0.8
2
4 20 30
UNITS
mA
V
V
V
V
V
V
V
V
mA
V
V
V
mA
V
V
V/µS
2









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1318 Даташит, Описание, Даташиты
LTC1318
ELECTRICAL CHARACTERISTICS
VS = 5V ±5%, C1 = C2 = 0.1µF, TA = 0°C to 70°C, unless otherwise specified. (Notes 2, 3)
SYMBOL PARAMETER
Differential Receiver
VTH Differential Receiver Threshold
CMR Common-Mode Input Range
Hysteresis
RIN Input Resistance
VOL Output Low Voltage
VOH Output High Voltage
IOSS Short-Circuit Output Current
Single-Ended Receiver
VL Input Voltage Low Threshold
VIH Input Voltage High Threshold
Hysteresis
RIN Input Resistance
VOL Output Low Voltage
VOH Output High Voltage
IOSS Short-Circuit Output Current
VILRXM
RXMODE Input Low Voltage
VIHRXM RXMODE Input High Voltage
IINRXM
RXMODE Input Current
Switching Characteristics
tPLH,HL
tSKEW
tR,F
tPLH,HL
tSEL
Differential Driver Propagation Delay
Differential Driver Output to Output
Differential Driver Rise, Fall Time
Differential Receiver Propagation Delay
Receiver Mode Switching Time
CONDITIONS
VCM = OV
TA = 25°C
IOUT = –1.6mA
IOUT = 160µA, VCC = 5V
VO = GND or VCC
TA = 25°C
IOUT = –4mA
IOUT = 4mA, VCC = 5V
VO = GND or VCC
VIN = OV or VCC
RL = 100, CL = 100pF (Figures 2,3)
RL = 100, CL = 100pF (Figures 2,3)
RL = 100, CL = 100pF (Figures 2,3)
CL = 15pF, (Figures 4)
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN TYP MAX
– 0.2 0.2
–7 7
30
357
0.4
3.5
±7 ±85
0.8 1.4
1.8 2.4
0.1 0.4 1.0
357
0.2 0.4
3.5 4.8
±7 ±85
0.8 1.6
1.6 2.0
±2
35 100
5 35
15 50
110 200
25 100
UNITS
V
V
mV
k
V
V
mA
V
V
V
k
V
–V
mA
V
V
µA
ns
ns
ns
ns
ns
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute maximum ratings are those values beyond which the life
of the device may be impaired.
Note 2: All currents into device pins are negative, all currents out of device
pins are positive. All voltages are referenced to ground unless otherwise
specified.
Note 3: All typicals are given at VCC = 5V, TA = 25°C.
3










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