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ADM3491 Datasheet(PDF) 3 Page - Analog Devices

Part # ADM3491
Description  3.3 V, Full Duplex, 840 uA 20 Mbps, EIA RS-485 Transceiver
PDF  12 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADM3491 Datasheet(HTML) 3 Page - Analog Devices

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ADM3491
–3–
REV. 0
TIMING SPECIFICATIONS
Parameter
Min
Typ
Max
Units
Test Conditions/ Comments
DRIVER
Differential Output Delay TDD
135
ns
RL = 60 Ω, CL1 = CL2 = 15 pF, Figure 5
Differential Output Transition Time
1
8
15
ns
RL = 60
Ω, C
L1 = CL2 = 15 pF, Figure 5
Propagation Delay Input to Output TPLH, TPHL
722
35
ns
RL = 27
Ω, C
L1 = CL2 = 15 pF, Figure 6
Driver O/P to O/P TSKEW
8ns
RL = 54 Ω, CL1 = CL2 = 15 pF, Figure 6
ENABLE/DISABLE
Driver Enable to Output Valid
45
90
ns
RL = 110 Ω, CL = 50 pF, Figure 3
Driver Disable Timing
40
80
ns
RL = 110
Ω, C
L = 50 pF, Figure 3
Driver Enable from Shutdown
650
110
ns
RL = 110
Ω, C
L = 15 pF, Figure 3
RECEIVER
Time to Shutdown
80
190
300
ns
Propagation Delay Input to Output TPLH, TPHL
25
65
90
ns
CL = 15 pF, Figure 8
Skew TPLH–TPHL
10
ns
CL = 15 pF, Figure 8
Receiver Enable TEN
25
50
ns
CL = 15 pF, Figure 4
Receiver Disable TDEN
25
45
ns
CL = 15 pF, Figure 4
Receiver Enable from Shutdown
500
ns
CL = 15 pF, Figure 4
(VCC = +3.3 V, TA = +25 C)
TIMING SPECIFICATIONS
Parameter
Min
Typ
Max
Units
Test Conditions/ Comments
DRIVER
Differential Output Delay TDD
170
ns
RL = 60
Ω, C
L1 = CL2 = 15 pF, Figure 5
Differential Output Transition Time
2
8
15
ns
RL = 60
Ω, C
L1 = CL2 = 15 pF, Figure 5
Propagation Delay Input to Output TPLH, TPHL
722
70
ns
RL = 27 Ω, CL1 = CL2 = 15 pF, Figure 6
Driver O/P to O/P TSKEW
10
ns
RL = 54
Ω, C
L1 = CL2 = 15 pF, Figure 6
ENABLE/DISABLE
Driver Enable to Output Valid
45
110
ns
RL = 110
Ω, C
L = 50 pF, Figure 3
Driver Disable Timing
40
110
ns
RL = 110 Ω, CL = 50 pF, Figure 3
Driver Enable from Shutdown
650
110
ns
RL = 110
Ω, C
L = 15 pF, Figure 3
RECEIVER
Time to Shutdown
50
190
500
ns
Propagation Delay Input to Output TPLH, TPHL
25
65
115
ns
CL = 15 pF, Figure 8
Skew TPLH–TPHL
20
ns
CL = 15 pF, Figure 8
Receiver Enable TEN
25
50
ns
CL = 15 pF, Figure 4
Receiver Disable TDEN
25
50
ns
CL = 15 pF, Figure 4
Receiver Enable from Shutdown
600
ns
CL = 15 pF, Figure 4
(VCC = +3.3 V
0.3 V, TA = TMIN to TMAX)



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