參數(shù)資料
型號: LTC1482CMS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 通用總線功能
英文描述: Low Power RS485 Transceiver with Carrier Detect and Receiver Fail-Safe
中文描述: LINE TRANSCEIVER, PDSO8
封裝: PLASTIC, MSOP-8
文件頁數(shù): 10/16頁
文件大小: 262K
代理商: LTC1482CMS8
10
LTC1482
SWITCHIU
W
W
DI/SHDN
3V
1.5V
t
PLH
t
DSKEW
90%
50%
t
r
t
SKEW
NOTE: DE = 1
1/2 V
O
V
O
f = 1MHz, t
r
10ns, t
f
10ns
50%
10%
0V
B
A
V
O
–V
O
90%
10%
1.5V
t
PHL
t
SKEW
t
f
V
O
= V(A) – V(B)
1482 F06
Figure 6. Driver Propagation Delays
Figure 9. Receiver Enable and Shutdown Timing
Figure 8. Receiver Propagation Delays
1.5V
2.3V
2.3V
t
ZH(SHDN)
,
t
ZH
NOTE: DI = 0 FOR t
ZL(SHDN)
, t
LZ(SHDN)
; DI = DE FOR t
ZH(SHDN)
, t
HZ(SHDN)
; DI = DE FOR t
ZL
, t
LZ
; DI = V
CC
FOR t
ZH
, t
HZ
t
ZL(SHDN)
,
t
ZL
1.5V
0.5V
0.5V
t
HZ
, t
HZ(SHDN)
t
LZ
, t
LZ(SHDN)
OUTPUT NORMALLY LOW
500
PULL-UP TO V
CC
OUTPUT NORMALLY HIGH,
500
PULL-DOWN TO GND
3V
0V
DE
5V
V
OL
V
OH
0V
A, B
A, B
1482 F07
f = 1MHz, t
r
10ns, t
f
10ns
Figure 7. Driver Enable and Disable Timing
1.5V
1.5V
1.5V
t
ZH(SHDN)
NOTE: DE = 0, RO IS THREE-STATED IN SHUTDOWN, 1k
PULL-UP FOR NORMALLY LOW OUTPUT,
1k
PULL-DOWN FOR NORMALLY HIGH OUTPUT
t
ZL(SHDN)
1.5V
0.5V
0.5V
t
HZ(SHDN)
t
LZ(SHDN)
OUTPUT
OUTPUT
DI
5V
3V
0V
5V
0V
RO
RO
1482 F09
f = 1MHz, t
r
10ns, t
f
10ns
0V
t
PHL
A – B
V
OL
RO
1.5V
NOTE: t
SKD
= |t
PHL
– t
PLH
|, DE = V
CC
1.5V
0V
t
PLH
INPUT
OUTPUT
5V
–V
OD2
V
OD2
1482 F08
f = 1MHz, t
r
10ns, t
f
10ns
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