PIN FUNCTIO
參數(shù)資料
型號(hào): LTC1484CS8#TR
廠商: Linear Technology
文件頁(yè)數(shù): 16/16頁(yè)
文件大?。?/td> 0K
描述: IC TXRX RS485 LP FAILSAFE 8SOIC
標(biāo)準(zhǔn)包裝: 2,500
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: RS422,RS485
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 帶卷 (TR)
9
LTC1484
PIN FUNCTIONS
UU
U
A (Pin 6): Driver Output/Receiver Input. The input resis-
tance is typically 22k when the driver is disabled (DE = 0).
When the driver is enabled, the A output follows the logic
level at the DI pin.
B (Pin 7): Driver Output/Receiver Input. The input resis-
tance is typically 22k when the driver is disabled (DE = 0).
When the driver is enabled, the B output is inverted from
the logic level at the DI pin.
VCC (Pin 8): Positive Supply. 4.75V ≤ VCC ≤ 5.25V. A 0.1F
bypass capacitor is recommended.
Driver
INPUTS
OUTPUTS
RE
DE
DI
B
A
X1
1
0
1
X1
0
1
0
O0
X
Z
10
X
Z*
FU CTIO TABLES
U
Receiver
INPUTS
OUTPUTS
RE
DE
A – B
RO
00
≥VTH(MAX)
1
00
≤VTH(MIN)
0
Inputs Open
1
0
Inputs Shorted
1
1X
X
Z
TEST CIRCUITS
OUTPUT
UNDER
TEST
CL
S1
S2
VCC
500
1484 F05
OUTPUT
UNDER
TEST
CRL
1k
S1
S2
VCC
1k
1484 F03
Figure 3
Figure 5
DE
RE
A
B
DI
CL1
RDIFF
CL2
RO
15pF
A
B
1484 F04
Figure 4
Note: Z = high impedance, X = don’t care
*Shutdown mode for LTC1484
Shutdown mode for LTC1484 if DE = 0. Table valid with or without
termination resistors.
VOD1
VOD2
A
B
R
VOC
1484 F01
Figure 1
VOD3
A
B
375
375
60
–7V TO 12V
1484 F02
Figure 2
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