LTC1345 LINER [Linear Technology], LTC1345 Datasheet - Page 5

• Manufacturer Part Number: LTC1345
• Description: Single Supply V.35 Transceiver
• Manufacturer: LINER [Linear Technology]

FU CTIO TABLES
PI FU CTIO S
Y3 (Pin 22): Transmitter 3 Noninverting Output.
Z2 (Pin 23): Transmitter 2 Inverting Output.
Y2 (Pin 24): Transmitter 2 Noninverting Output
Z1 (Pin 25): Transmitter 1 Inverting Output.
TEST CIRCUITS
Transmitter and Receiver Configuration
Transmitter
CONFIGURATION S1 S2
DTE
DTE
DCE or All ON
DCE or All ON
Shutdown
S1
0
1
0
1
T
U
U
Y
Z
Figure 1. V.35 Transmitter/Receiver Test Circuit
S2
U
0
0
1
1
V
OD
Y
Z
U
50
50
125
1, 2, 3
1, 2, 3
0
0
1
1
0
TX#
1, 2
—
INPUTS
V
OC
U
X
X
1
1
0
= (V
V
Y
T
0
1
0
1
X
OS
1, 2, 3
1, 2, 3
+ V
RX#
1, 2
—
Z
125
)/2
Y1 AND Y2
0
1
0
1
Z
REMARKS
Shutdown
DCE Mode, RX3 Shut Down
DTE Mode, TX3 Shut Down
All Active
50
50
Z1 AND Z2
OUTPUTS
B
A
1
0
1
0
Z
OE
R
Y3
Z
Z
0
1
Z
LTC1345 • F01
15pF
Z3
Z
Z
1
0
Z
Y1 (Pin 26): Transmitter 1 Noninverting Output.
V
terminal of capacitor C3.
C2
Receiver
CONFIGURATION S1 S2 OE
DTE or All ON
DTE or All ON
DCE
DCE
Disabled
Shutdown
EE
Figure 2. Receiver Output Enable/Disable Timing Test Load
–
(Pin 27): Charge Pump Output. Connected to negative
(Pin 28): Capacitor C2 Negative Terminal.
RECEIVER
OUTPUT
X
X
1
1
X
0
X
1
1
0
0
0
INPUTS
0
0
0
0
1
X
C
L
B – A
1k
– 0.2V
– 0.2V
0.2V
0.2V
X
X
V
R1 AND R2
CC
S1
S2
LTC1345 • F02
LTC1345
1
0
1
0
Z
Z
OUTPUTS
R3
1
0
Z
Z
Z
Z
5