參數(shù)資料
型號(hào): LTC1689
廠商: Linear Technology Corporation
英文描述: 100Mbps RS485 Hot Swapable Quad Drivers(100Mbps RS485熱交換四路驅(qū)動(dòng)器)
中文描述: 100Mbps的485熱Swapable四驅(qū)動(dòng)器(100Mbps的485熱交換四路驅(qū)動(dòng)器)
文件頁(yè)數(shù): 5/12頁(yè)
文件大小: 193K
代理商: LTC1689
5
LTC1688/LTC1689
PI
FU
CTIO
N
S
U
U
DI1 (Pin 1):
Driver 1 Input. Do not float.
DO1A (Pin 2):
Driver 1 Noninverting Output.
DO1B (Pin 3):
Driver 1 Inverting Output.
EN (Pin 4, LTC1688):
High True Enable Pin, enables all
four drivers. A low on Pin 4 and a high on Pin 12 will put
all driver outputs into a high impedance state. See
Function Tables for details. Do not float.
EN12 (Pin 4, LTC1689):
Enables Drivers 1 and 2. A low on
Pin 4 will put the outputs of drivers 1 and 2 into a high
impedance state. See Function Tables for details. Do not
float.
DO2B (Pin 5):
Driver 2 Inverting Output.
DO2A (Pin 6):
Driver 2 Noninverting Output.
DI2 (Pin 7):
Driver 2 Input. Do not float.
GND (Pin 8):
Ground Connection. A good ground plane is
recommended for all applications.
DI3 (Pin 9):
Driver 3 Input. Do not float.
DO3A (Pin 10):
Driver 3 Noninverting Output.
DO3B (Pin 11):
Driver 3 Inverting Output.
ENB (Pin 12, LTC1688):
Low True Enable Pin, enables all
four drivers. A low on Pin 4 and a high on Pin 12 will put
all driver outputs into a high impedance state. See
Function Tables for details. Do not float.
EN34 (Pin 12, LTC1689):
Enables Drivers 3 and 4. A low
on Pin 12 will put the outputs of drivers 3 and 4 into a high
impedance state. See Function Tables for details. Do not
float.
DO4B (Pin 13):
Driver 4 Inverting Output.
DO4A (Pin 14):
Driver 4 Noninverting Output.
DI4 (Pin 15):
Driver 4 Input. Do not float.
V
DD
(Pin 16):
Power Supply Input. This pin should be
bypassed with a 0.1
μ
F ceramic capacitor as close to the
pin as possible. Recommended: V
DD
= 3V to 5.25V.
FUU
LTC1688
INPUTS
EN
H
H
X
X
L
OUTPUTS
DI
H
L
H
L
X
ENB
X
X
L
L
H
OUTA
H
L
H
L
HI-Z
OUTB
L
H
L
H
HI-Z
LTC1689
INPUTS
OUTPUTS
DI
H
L
X
EN12/EN34
H
H
L
OUTA
H
L
HI-Z
OUTB
L
H
HI-Z
1688/89 TC03
OUTPUT
UNDER TEST
C
L
S1
500
DD
V
S2
1688/89 TC01
A
B
R
R
OD
V
OC
V
Figure 1. Driver DC Test Load
Figure 3. Driver Timing Test Load
DRIVER
1688/89 TC02
ENB (EN34)
DI
A
B
EN (EN12)
R
DIFF
C
L1
C
L2
Figure 2. Driver Timing Test Circuit
TEST CIRCUITS
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