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