參數(shù)資料
型號: LTC487ISW#TR
廠商: Linear Technology
文件頁數(shù): 8/12頁
文件大?。?/td> 0K
描述: IC DRIVER RS485 QUAD LP 16SOIC
標(biāo)準(zhǔn)包裝: 1,000
類型: 驅(qū)動器
驅(qū)動器/接收器數(shù): 4/0
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: 16-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC
包裝: 帶卷 (TR)
LTC487
487fc
pin FuncTions
DI1 (Pin 1): Driver 1 Input. If Driver 1 is enabled, then a
low on DI1 forces the driver outputs DO1A low and DO1B
high. A high on DI1 with the driver outputs enabled will
force DO1A high and DO1B low.
DO1A (Pin 2): Driver 1 Output.
DO1B (Pin 3): Driver 1 Output.
EN12 (Pin 4): Driver 1 and 2 Outputs Enabled. See Func-
tion Table for details.
DO2B (Pin 5): Driver 2 Output.
DO2A (Pin 6): Driver 2 Output.
DI2 (Pin 7): Driver 2 Input. Refer to DI1.
GND (Pin 8): GND Connection.
DI3 (Pin 9): Driver 3 Input. Refer to DI1.
DO3A (Pin 10): Driver 3 Output.
DO3B (Pin 11): Driver 3 Output.
EN34 (Pin 12): Driver 3 and 4Outputs Enabled. See Func-
tion Table for details.
DO4B (Pin 13): Driver 4 Output.
DO4A (Pin 14): Driver 4 Output.
DI4 (Pin 15): Driver 4 Input. Refer to DI1.
VCC (Pin 16): Positive Supply; 4.75 < VCC < 5.25.
H: High Level
L: Low Level
X: Irrelevant
Z: High Impedance (Off)
INPUT
ENABLES
OUTPUTS
DI
EN12 or EN34
OUT A
OUT B
H
L
X
H
L
H
L
Z
L
H
Z
FuncTion Table
swiTching TiMe waveForMs
–VO
LTC487 TA05
B
A
DI
VO
1/2 VO
3V
0V
tSKEW
1.5V
tPLH
1.5V
tPHL
1/2 VO
V
= V(A) – V(B)
VO
80%
20%
tf
90%
DIFF
10%
tSKEW
tr
f = 1MHz : t
10ns : t
10ns
<
r
f
LTC487 TA06
A, B
EN12
3V
0V
f = 1MHz : t
10ns : t
10ns
VOL
VOH
1.5V
5V
OUTPUT NORMALLY LOW
tZL
2.3V
tLZ
0.5V
A, B
0V
tZH
2.3V
OUTPUT NORMALLY HIGH
tHZ
0.5V
r
f
Figure 2. Driver Enable and Disable Times
Figure 1. Driver Propagation Delays
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