LTC1543IG Linear Technology, LTC1543IG Datasheet - Page 11

• Manufacturer Part Number: LTC1543IG
• Description: IC TXRX SOFTWARE SELECTBL 28SSOP
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LTC1543IG

• Number Of Drivers/receivers: 3/3
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Protocol: -

APPLICATIO S I FOR ATIO
–3.25mA
V.11 (RS422) Interface
A typical V.11 balanced interface is shown in Figure 15. A
V.11 differential generator with outputs A and B with
ground C is connected to a differential receiver with
ground C
V.11 interface has a differential termination at the receiver
end that has a minimum value of 100 . The termination
resistor is optional in the V.11 specification, but for the
high speed clock and data lines, the termination is required
to prevent reflections from corrupting the data. The
receiver inputs must also be compliant with the imped-
ance curve shown in Figure 13.
In V.11 mode, all switches are off except S1 inside the
LTC1344A which connects a 103 differential termina-
tion impedance to the cable as shown in Figure 16.
–10V
'
, inputs A
Figure 13. V.10 Receiver Input Impedance
'
U
connected to A, B
–3V
U
I
Z
3V
W
'
connected to B. The
U
10V
1543 F13
V
3.25mA
Z
B
C
A
'
'
'
GENERATOR
R1
51.5
S1
R2
51.5
S2
B
C
A
'
'
'
LTC1344A
124
Figure 14. V.10 Receiver Configuration
Figure 16. V.11 Receiver Configuration
R3
A
B
C
Figure 15. Typical V.11 Interface
A
B
INTERCONNECTING
BALANCED
A
GND
CABLE
B
R8
6k
S3
20k
20k
R5
R4
GND
R8
6k
S3
20k
20k
R5
R4
A
B
C
TERMINATION
R6
10k
R7
10k
'
'
'
CABLE
R6
10k
R7
10k
RECEIVER
LTC1544
100
MIN
LTC1543
LOAD
RECEIVER
LTC1543
LTC1544
1543 F14
RECEIVER
sn1534 1543fas
11
1543 F16
1543 F15