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ST3485EBDR 데이터시트(PDF) 5 Page - STMicroelectronics

부품명 ST3485EBDR
상세설명  3.3V POWERED, 15KV ESD PROTECTED, TRASMIT AT UP TO 12MBPS TRUE RS-485/RS-422 TRANSCEIVER
PDF  16 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST3485EBDR 데이터시트(HTML) 5 Page - STMicroelectronics

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ST3485E
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DRIVER SWITCHING CHARACTERISTICS
VCC =3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta =25°C)
RECEIVER SWITCHING CHARACTERISTICS
VCC =3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta = 25°C)
Note 1:
∆V
OD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 2: measured on |tPLH(A)-tPHL(A)| and |tPLH(B)-tPHL(B)|
Note 3: The transceivers are put into shutdown by bring RE high and DE low. If the input are in state for less than 80ns, the part are guaren-
teed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guarenteed to have entered shutdown.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
DR
Maximum Data Rate
12
15
Mbps
tDD
Differential Output Delay
RL=60Ω
CL = 15pF, (Figures 4,5)
18
30
ns
tTD
Differential Output
Transition Time
RL=60Ω
CL = 15pF, (Figures 4,5)
12
20
ns
tPLH
tPHL
Propagation Delay
RL=27Ω
CL = 15pF, (Figures 8,9)
18
30
ns
tPDS
|tPLH - tPHL| Propagation
Delay Skew (Note2)
RL=27Ω
CL = 15pF, (Figures 8,9)
2
5
ns
tPZL
Output Enable Time
RL=110Ω
(Figures 10,11)
19
35
ns
tPZH
Output Enable Time
RL=110Ω
(Figures 6,7)
30
50
ns
tPHZ
Output Disable Time
RL=110Ω
(Figures 6,7)
19
35
ns
tPLZ
Output Disable Time
RL=110Ω
(Figures 10,11)
30
50
ns
tSKEW
Differential Output Delay
Skew
13
ns
tZH(SHDN) Driver Enable from
Shutdown to Output High
30
50
ns
tZL(SHDN) Driver Enable from
Shutdown to Output Low
19
35
ns
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
tPLH
tPHL
Propagation Delay
VID =0V to 3V CL1 = 15pF, (Figures 12,13)
30
50
ns
tRPDS
|tPLH - tPHL| Propagation
Delay Skew
VID =0V to 3V CL1 = 15pF, (Figures 12,13)
1
3
ns
tPZL
Output Enable Time
CRL = 15pF (Figures 14-18)
10
20
ns
tPZH
Output Enable Time
CRL = 15pF (Figures 14-18)
10
20
ns
tPHZ
Output Disable Time
CRL = 15pF (Figures 14-18)
10
20
ns
tPLZ
Output Disable Time
CRL = 15pF (Figures 14-18)
10
20
ns
tZH(SHDN) Receiver Enable from
Shutdown to Output High
CRL = 15pF (Figures 14-18)
10
20
ns
tZL(SHDN) Receiver Enable from
Shutdown to Output Low
CRL = 15pF (Figures 14-18)
20
40
ns



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