LTC1346A(RevA) View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1346A Datasheet PDF : 12 Pages
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LTC1346A
FU CTIO TABLES
Transmitter and Receiver Configuration
S0 S1 S2 DX ON RX ON Description
00 0
— 1, 2, 3 All RX ON, All DX OFF
10 0
—
— All OFF, Shutdown
0 1 0 1, 2, 3 1, 2 DCE Mode
1 1 0 1, 2, 3 — DCE Mode, All RX OFF
0 0 1 1, 2 1, 2, 3 DTE Mode
1 0 1 1, 2
— DTE Mode, All RX OFF
0 1 1 1, 2, 3 1, 2, 3 All ON
1 1 1 1, 2, 3 — All DX ON, All RX OFF
Transmitter
INPUTS
OUTPUTS
CONFIGURATION S0 S1 S2 T Y1 AND Y2 Z1 AND Z2 Y3 Z3
All OFF
000X
Z
Z
ZZ
Shutdown
100X
Z
Z
ZZ
DCE or All ON X 1 X 0
0
1
01
DCE or All ON X 1 X 1
1
0
10
DTE
X010
0
1
ZZ
DTE
X011
1
0
ZZ
Receiver
INPUTS
CONFIGURATION S0 S1 S2 A – B
All Rx ON
0 0 0 ≤ –0.2V
All Rx ON
0 0 0 ≥ 0.2V
Shutdown
10 0
X
DCE
0 1 0 ≤ –0.2V
DCE
Disabled
01 0
11 0
≥ 0.2V
X
DTE or All ON
0 X 1 ≤ –0.2V
DTE or All ON
0 X 1 ≥0.2V
Disabled
1X 1
X
OUTPUTS
R1 AND R2 R3
0
0
1
1
Z
Z
0
Z
1
Z
Z
Z
0
0
1
1
Z
Z
TEST CIRCUITS
Y
50Ω
T
Y
VOD
125Ω
VOS 125Ω
50Ω
A
R
Z
50Ω
B
50Ω
S0
15pF
VOC = (VY + VZ)/2
Z
LTC1346A • F01
Figure 1. V.35 Transmitter/Receiver Test Circuit
VCC
RECEIVER
OUTPUT
1k
CL
SW1
SW2
LTC1346A • F02
Figure 2. Receiver Output Enable and Disable Timing Test Load
1346afa
5
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