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LTC1544CG#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
1
LTC1544
Software-Selectable
Multiprotocol Transceiver
D2 D1
LTC1544
RTS
DTRDSR DCDCTS
D3
R2 R1R4
R3
D2
LTC1543
LL
TXDSCTETXC
RXCRXD
21424111512179314192062322513 81018 7 16
1544 TA01
LTC1344A
D3
R2
R1R3
D1
TXD A (103)
TXD B
SCTE A (113)
SCTE B
RXC A (115)
RXC B
RXD A (104)
RXD B
RTS A (105)
RTS B
DTR A (108)
DTR B
CTS A (106)
CTS B
LL A (141)
SG (102)
SHIELD (101)
DB-25 CONNECTOR
TXC A (114)
TXC B
DCD A (109)
DCD B
DSR A (107)
DSR B
D4
DTE or DCE Multiprotocol Serial Interface with DB-25 Connector
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Data Networking
■
CSU and DSU
■
Data Routers
■
Software-Selectable Transceiver Supports:
RS232, RS449, EIA530, EIA530-A, V.35, V.36, X.21
■
TUV/Detecon Inc. Certified NET1 and NET2
Compliant (Test Report No. NET2/102201/97)
■
TBR2 Compliant (Test Report No. CTR2/022701/98)
■
Software-Selectable Cable Termination Using
the LTC1344A
■
Complete DTE or DCE Port with LTC1543, LTC1344A
or LTC1546 with Integrated Termination
■
Operates from Single 5V Supply with LTC1543
The LTC
®
1544 is a 4-driver/4-receiver multiprotocol trans-
ceiver. The LTC1544 and LTC1543 form the core of a
complete software-selectable DTE or DCE interface port that
supports the RS232, RS449, EIA530, EIA530-A, V.35, V.36
or X.21 protocols. Cable termination for the LTC1543 may be
implemented using the LTC1344A software-selectable cable
termination chip or by using existing discrete designs. The
LTC1546 includes software-selectable cable termination on-
chip.
The LTC1544 runs from a 5V supply and the charge pump on
the LTC1543 or LTC1546. The part is available in a 28-lead
SSOP surface mount package.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
2
LTC1544
ORDER PART
NUMBER
(Note 1)
Supply Voltage, V
CC
................................................ 6.5V
Input Voltage
Transmitters ........................... –0.3V to (V
CC
+ 0.3V)
Receivers............................................... –18V to 18V
Logic Pins .............................. –0.3V to (V
CC
+ 0.3V)
Output Voltage
Transmitters .................. (V
EE
– 0.3V) to (V
DD
+ 0.3V)
Receivers................................ –0.3V to (V
CC
+ 0.3V)
V
EE
........................................................ –10V to 0.3V
V
DD
....................................................... –0.3V to 10V
Short-Circuit Duration
Transmitter Output ..................................... Indefinite
Receiver Output.......................................... Indefinite
V
EE
.................................................................. 30 sec
Operating Temperature Range
LTC1544CG ............................................. 0°C to 70°C
LTC1544IG ........................................ –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LTC1544CG
LTC1544IG
T
JMAX
= 150°C, θ
JA
= 65°C/W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
V
DD
D1
D2
D3
R1
R2
R3
D4
R4
M0
M1
M2
DCE/DTE
V
EE
GND
D1 A
D1 B
D2 A
D2 B
D3/R1 A
D3/R1 B
R2 A
R2 B
R3 A
R3 B
D4/R4 A
INVERT
R1
D2
D1
R2
D3
G PACKAGE
28-LEAD PLASTIC SSOP
R3
D4
R4
Consult factory for Military grade parts.
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
DD
= 8V, V
EE
= – 7V for V.28, – 5.5V for V.10, V.11 (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
I
CC
V
CC
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 2.7 mA
All Digital Pins = GND or V
CC
) RS530, RS530-A, X.21 Modes, Full Load ● 95 120 mA
V.28 Mode, No Load
● 12 mA
V.28 Mode, Full Load
● 12 mA
No-Cable Mode
● 10 200 µA
I
EE
V
EE
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 2.1 mA
All Digital Pins = GND or V
CC
) RS530, X.21 Modes, Full Load 14 mA
V
EE
= –5.6V (RS530, RS530-A Modes) RS530-A, Full Load 25 mA
V
EE
= –8.46V (V.28 Mode) V.28 Mode, No Load 1 mA
V.28 Mode, Full Load 12 mA
No-Cable Mode 10 µA
I
DD
V
DD
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, NoLoad 0.2 mA
All Digital Pins = GND or V
CC
) RS530, RS530-A, X.21 Modes, Full Load 0.2 mA
V
DD
= 8.73V V.28 Mode, No Load 1 mA
V.28 Mode, Full Load 12 mA
No-Cable Mode 10 µA
P
D
Internal Power Dissipation (DCE Mode, RS530, RS530-A, X.21 Modes, Full Load 300 mW
(All Digital Pins = GND or V
CC
) V.28 Mode, Full Load 54 mW
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
3
LTC1544
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
DD
= 8V, V
EE
= – 7V for V.28, – 5.5V for V.10, V.11 (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Logic Inputs and Outputs
V
IH
Logic Input High Voltage ● 2V
V
IL
Logic Input Low Voltage ● 0.8 V
I
IN
Logic Input Current D1, D2, D3, D4 ● ±10 µA
M0, M1, M2, DCE, INVERT = GND (LTC1544C)
● –100 –50 –30 µA
M0, M1, M2, DCE, INVERT = GND (LTC1544I)
● –120 –50 –30 µA
M0, M1, M2, DCE, INVERT = V
CC
● ±10 µA
V
OH
Output High Voltage I
O
= –4mA ● 3 4.5 V
V
OL
Output Low Voltage I
O
= 4mA ● 0.3 0.8 V
I
OSR
Output Short-Circuit Current 0V ≤ V
O
≤ V
CC
● –50 40 50 mA
I
OZR
Three-State Output Current M0 = M1 = M2 = V
CC
, 0V ≤ V
O
≤ V
CC
±1 µA
V.11 Driver
V
ODO
Open Circuit Differential Output Voltage R
L
= 1.95k (Figure 1) ● ±5V
V
ODL
Loaded Differential Output Voltage R
L
= 50Ω (Figure 1) 0.5V
ODO
0.67V
ODO
V
R
L
= 50Ω (Figure 1) ● ±2V
∆V
OD
Change in Magnitude of Differential R
L
= 50Ω (Figure 1) ● 0.2 V
Output Voltage
V
OC
Common Mode Output Voltage R
L
= 50Ω (Figure 1) ● 3V
∆V
OC
Change in Magnitude of Common Mode R
L
= 50Ω (Figure 1) ● 0.2 V
Output Voltage
I
SS
Short-Circuit Current V
OUT
= GND ±150 mA
I
OZ
Output Leakage Current –0.25V ≤ V
O
≤ 0.25V, Power Off or ● ±1 ±100 µA
No-Cable Mode or Driver Disabled
t
r
, t
f
Rise or Fall Time LTC1544C (Figures 2, 5) ● 21525 ns
LTC1544I (Figures 2, 5)
● 21535 ns
t
PLH
Input to Output LTC1544C (Figures 2, 5) ● 20 40 65 ns
LTC1544I (Figures 2, 5)
● 20 40 75 ns
t
PHL
Input to Output LTC1544C (Figures 2, 5) ● 20 40 65 ns
LTC1544I (Figures 2, 5)
● 20 40 75 ns
∆t Input to Output Difference, t
PLH
– t
PHL
LTC1544C (Figures 2, 5) ● 0312 ns
LTC1544I (Figures 2, 5)
● 0317 ns
t
SKEW
Output to Output Skew (Figures 2, 5) 3 ns
V.11 Receiver
V
TH
Input Threshold Voltage –7V ≤ V
CM
≤ 7V ● –0.2 0.2 V
∆V
TH
Input Hysteresis –7V ≤ V
CM
≤ 7V ● 15 40 mV
I
IN
Input Current (A, B) –10V ≤ V
A,B
≤ 10V ● ±0.66 mA
R
IN
Input Impedance –10V ≤ V
A,B
≤ 10V ● 15 30 kΩ
t
r
, t
f
Rise or Fall Time (Figures 2, 6) 15 ns
t
PLH
Input to Output LTC1544C (Figures 2, 6) ● 50 80 ns
LTC1544I (Figures 2, 6)
● 50 90 ns
t
PHL
Input to Output LTC1544C (Figures 2, 6) ● 50 80 ns
LTC1544I (Figures 2, 6)
● 50 90 ns
∆t Input to Output Difference, t
PLH
– t
PHL
LTC1544C (Figures 2, 6) ● 0416 ns
LTC1544I (Figures 2, 6)
● 0421 ns
ELECTRICAL CHARACTERISTICS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC1544CG#PBF

Mfr. #:
Buy LTC1544CG#PBF
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC Multiprotocol (Quote LTCK003, 011)
Lifecycle:
New from this manufacturer.
Delivery:
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