Enable times tZH
參數(shù)資料
型號(hào): MAX13184EESD+T
廠商: Maxim Integrated Products
文件頁數(shù): 5/18頁
文件大小: 0K
描述: IC TXRX RS-485 +5.0V ESD 14SOIC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
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: RS485
電源電壓: 4.5 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 14-SOIC
包裝: 帶卷 (TR)
DE is low for 200ns (typ), the devices are guaranteed to
enter shutdown.
Enable times tZH and tZL (see the Switching Character-
istics) assume the devices are not in a low-power shut-
down state. Enable times tZH(SHDN) and tZL(SHDN)
assume the devices are in a shutdown state. It takes dri-
vers and receivers longer to become enabled from low-
power shutdown mode (tZH(SHDN), tZL(SHDN)) than from
driver-/receiver-disable mode (tZH, tZL).
Line Length
The RS-485 standard covers line lengths up to 4000ft.
For line lengths greater than 4000ft, use the repeater
application shown in Figure 8.
Typical Applications
The MAX13181E–MAX13184E transceivers are designed
for bidirectional data communications on multipoint bus
transmission lines. The MAX13181E/MAX13183E can be
used in either half-duplex or full-duplex configuration.
The MAX13182E/MAX13184E are for full-duplex only.
Figure 9 shows the typical network application circuit for
half-duplex, and Figures 10 and 11 show typical network
application circuits for full duplex.
To minimize reflections, terminate the line at both ends in
its characteristics impedance, and keep stub lengths off
the main line as short as possible. The slew-rate-limited
MAX13181E/MAX13182E are more tolerant of imperfect
termination.
MAX13181E–MAX13184E
+5.0V, ±15kV ESD-Protected, Half-Duplex/
Full-Duplex, RS-485 Transceiver in DFN
______________________________________________________________________________________
13
RO
DI
(H/F)
DE
R
D
MAX13182E/MAX13184E
(FULL DUPLEX)
*RE
120
Ω
120
Ω
A
B
Z
Y
DATA IN
DATA OUT
(H/F for MAX13181E/
MAX13183E ONLY)
*RE FOR
Figure 8. Line Repeater for MAX13181E–MAX13184E
DI
RO
DE
A
B
RE
RO
DI
DE
H/F
D
R
BB
B
A
120
Ω
VCC
120
Ω
D
R
MAX13181E–MAX13184E
CONFIGURED FOR HALF-
DUPLEX OPERATION
RE
Figure 9. Typical Half-Duplex RS-485 Network
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