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參數(shù)資料
| 型號(hào)： | MAX3085EPA |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS485/RS422 10MPBS 8-DIP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 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： | 通孔 |
| 封裝/外殼： | 8-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 8-PDIP |
| 包裝： | 管件 |
| 其它名稱： | Q1152458 |
Low-Power Shutdown Mode
(Except MAX3082/MAX3085/MAX3088)
Low-power shutdown mode is initiated by bringing both
RE high and DE low. In shutdown, the devices typically
draw only 1nA of supply current.
RE and DE may be driven simultaneously; the parts are
guaranteed not to enter shutdown if RE is high and DE
is low for less than 50ns. If the inputs are in this state
for at least 600ns, the parts are guaranteed to enter
shutdown.
Enable times tZH and tZL in the Switching Char-
acteristics tables assume the part was not in a low-
power shutdown state. Enable times tZH(SHDN) and
tZL(SHDN) assume the parts were shut down. It takes
drivers and receivers longer to become enabled from
low-power shutdown mode (tZH(SHDN), tZH(SHDN)) than
from driver/receiver-disable mode (tZH, tZL).
Driver Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldback current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
Typical Operating Characteristics). The second, a ther-
mal shutdown circuit, forces the driver outputs into a
high-impedance state if the die temperature becomes
excessive.
Line Length vs. Data Rate
The RS-485/RS-422 standard covers line lengths up to
4000 feet. For line lengths greater than 4000 feet, use
the repeater application shown in Figure 17.
Figures 18, 19, and 20 show the system differential volt-
age for the parts driving 4000 feet of 26AWG twisted-
pair wire at 110kHz into 120
loads.
Typical Applications
The MAX3082/MAX3085/MAX3088/MAX3089 trans-
ceivers are designed for bidirectional data communica-
tions on multipoint bus transmission lines. Figures 21
and 22 show typical network applications circuits.
These parts can also be used as line repeaters, with
cable lengths longer than 4000 feet, as shown in Figure 17.
To minimize reflections, the line should be terminated at
both ends in its characteristic impedance, and stub
lengths off the main line should be kept as short as
possible. The slew-rate-limited MAX3082/MAX3085,
and the two modes of the MAX3089, are more tolerant
of imperfect termination.
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
120
120
DATA IN
DATA OUT
R
D
RO
RE
DE
DI
A
B
Z
Y
MAX3080/MAX3081/MAX3083/
MAX3084/MAX3086/MAX3087/
MAX3089 (FULL DUPLEX)
NOTE: RE AND DE ON MAX3080/MAX3083/MAX3086/MAX3089 ONLY.
Figure 17. Line Repeater for MAX3080/MAX3081/MAX3083/
MAX3084/MAX3086/MAX3087, and MAX3089
in Full-Duplex Mode
5
s/div
VA - VB
DI
RO
1V/div
5V/div
MAX3080/3089 FIG-18
Figure 18. MAX3080/MAX3081/MAX3082, and MAX3089
with SRL = Unconnected, System Differential Voltage at 50kHz
Driving 4000 feet of Cable
MAX3080–MAX3089
18
Maxim Integrated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3085EPA+ | 功能描述:RS-422/RS-485 接口 IC Fail-Safe 10Mbps RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3085ESA | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3085ESA+ | 功能描述:RS-422/RS-485 接口 IC Fail-Safe 10Mbps RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3085ESA+T | 功能描述:RS-422/RS-485 接口 IC Fail-Safe 10Mbps RS-485/RS-422 Tcvr RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3085ESA-T | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
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