LTC1484C Просмотр технического описания (PDF) - Linear Technology
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LTC1484C Datasheet PDF : 16 Pages
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LTC1484
PIN FUNCTIONS
A (Pin 6): Driver Output/Receiver Input. The input resis-
tance is typically 22k when the driver is disabled (DE = 0).
When the driver is enabled, the A output follows the logic
level at the DI pin.
B (Pin 7): Driver Output/Receiver Input. The input resis-
tance is typically 22k when the driver is disabled (DE = 0).
When the driver is enabled, the B output is inverted from
the logic level at the DI pin.
VCC (Pin 8): Positive Supply. 4.75V ≤ VCC ≤ 5.25V. A 0.1µF
bypass capacitor is recommended.
FU CTIO TABLES
Driver
INPUTS
RE
DE
DI
X
1
1
X
1
0
O
0
X
1
0
X
Note: Z = high impedance, X = don’t care
*Shutdown mode for LTC1484
OUTPUTS
B
A
0
1
1
0
Z
Z
Z*
Z*
Receiver
RE
0
0
0
0
1
INPUTS
DE
A–B
0
≥ VTH(MAX)
0
≤ VTH(MIN)
0
Inputs Open
0
Inputs Shorted
X
X
OUTPUTS
RO
1
0
1
1
Z†
†Shutdown mode for LTC1484 if DE = 0. Table valid with or without
termination resistors.
TEST CIRCUITS
A
VOD1
VOD2
R
R
VOC
B
1484 F01
Figure 1
375Ω
A
VOD3
B
60Ω
–7V TO 12V
375Ω
1484 F02
Figure 2
DE
A
DI
B
RDIFF
A
CL1
B
CL2
RE
Figure 4
RO
15pF
1484 F04
OUTPUT
UNDER
TEST
S1
CRL
1k
S2
Figure 3
1k
VCC
1484 F03
OUTPUT
UNDER
TEST
500Ω
CL
S1
VCC
S2
1484 F05
Figure 5
9
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