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ADM3485EAR-REEL7 Fiches technique(PDF) 4 Page - Analog Devices

No de pièce ADM3485EAR-REEL7
Description  짹15 kV ESD-Protected, 3.3 V,12 Mbps, EIA RS-485/RS-422 Transceiver
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

ADM3485EAR-REEL7 Fiches technique(HTML) 4 Page - Analog Devices

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ADM3485E
Rev. D | Page 4 of 16
TIMING SPECIFICATIONS
VCC = 3.3 V, TA = 25°C.
Table 2.
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
DRIVER
Maximum Data Rate
12
15
Differential Output Delay
tDD
1
22
35
ns
RL = 60 Ω, CL1 = CL2 = 15 pF (see Figure 6)
Differential Output Transition Time
tTD
3
11
25
ns
RL = 60 Ω, CL1 = CL2 = 15 pF (see Figure 6)
Propagation Delay
From Low to High Level
tPLH
7
23
35
ns
RL = 27 Ω (see Figure 7)
From High to Low Level
tPHL
7
23
35
ns
RL = 27 Ω (see Figure 7)
|tPLH − tPHL| Propagation Delay Skew
tPDS
–1.4
±8
ns
RL = 27 Ω (see Figure 7)
Enable/Disable Timing
Enable Time to Low Level
tPZL
42
90
ns
RL = 110 Ω (see Figure 9)
Enable Time to High Level
tPZH
42
90
ns
RL = 110 Ω (see Figure 8)
Disable Time from Low Level
tPLZ
35
80
ns
RL = 110 Ω (see Figure 9)
Disable Time from High Level
tPHZ
35
80
ns
RL = 110 Ω (see Figure 8)
Enable Time from Shutdown to Low Level
tPSL
650
900
ns
RL = 110 Ω (see Figure 9)
Enable Time from Shutdown to High Level
tPSH
650
900
ns
RL = 110 Ω (see Figure 8)
RECEIVER
Propagation Delay
From Low to High Level
tRPLH
25
62
90
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 10)
From High to Low Level
tRPHL
25
62
90
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 10)
|tRPLH − tRPHL| Propagation Delay Skew
tRPDS
6
±10
ns
VID = 0 V to 3.0 V, CL = 15 pF (see Figure 10)
Enable/Disable Timing
Enable Time to Low Level
tRPZL
25
50
ns
CL = 15 pF (see Figure 11)
Enable Time to High Level
tRPZH
25
50
ns
CL = 15 pF (see Figure 11)
Disable Time from Low Level
tRPLZ
25
45
ns
CL = 15 pF (see Figure 11)
Disable Time from High Level
tRPHZ
25
45
ns
CL = 15 pF (see Figure 11)
Enable Time from Shutdown to Low Level
tRPSL
720
1400
ns
CL = 15 pF (see Figure 11)
Enable Time from Shutdown to High Level
tRPSH
720
1400
ns
CL = 15 pF (see Figure 11)
Time to Shutdown1
tSHDN
80
190
300
ns
1
The transceivers are put into shutdown mode by bringing the RE high and the DE low. If the inputs are in this state for less than 80 ns, the parts are guaranteed not to
enter shutdown. If the parts are in this state for 300 ns or more, the parts are guaranteed to enter shutdown.


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