參數(shù)資料
型號： MAX3480BEPI+
廠商： Maxim Integrated Products
文件頁數(shù)： 2/16頁
文件大小： 0K
描述： IC RS485/RS422 DATA INTRFC 28DIP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 14
類型： 收發(fā)器
驅(qū)動器/接收器數(shù)： 1/1
規(guī)程： RS422，RS485
電源電壓： 3 V ~ 3.6 V
安裝類型： 通孔
封裝/外殼： 28-DIP（0.600"，15.24mm）
供應(yīng)商設(shè)備封裝： 28-PDIP
包裝： 管件
MAX3480A/MAX3480B
Complete, Isolated, 3.3V
RS-485/RS-422 Data Interface
10
______________________________________________________________________________________
shutdown circuitry that puts the driver outputs into a
high-impedance state. The receiver input has a fail-safe
feature that guarantees a logic-high output if the input
is open circuit.
The driver outputs are enabled by bringing DE
high.
Driver-enable times are typically 200ns for the
MAX3480A and 50s for the MAX3480B. Allow time for
the devices to be enabled before sending data. When
enabled, driver outputs function as line drivers. Driver
outputs are high impedance when DE
is low. While
outputs are high impedance, they function as line
receivers.
The MAX3480A/MAX3480B typically withstand
1600VRMS (1 minute) or 2000VRMS (1 second). The iso-
lated outputs of these devices meet all RS-485/RS-422
specifications. The logic inputs can be driven from any
TTL/CMOS-logic family with a series resistor, and the
received data output can directly drive any of the
TTL/CMOS-logic families with only a resistive pull-up.
Boost Voltage
The MAX3480 requires external diodes on the primary
of the transformer to develop the boost voltage for the
power oscillator. In normal operation, whenever one of
the oscillator outputs (D1 and D2) goes low, the other
Figure 2. Typical Application Circuit
AC1 (MAKE NO CONNECTION)
AC2 (MAKE NO CONNECTION)
SHIELD (OPTIONAL)
EXTERNAL RS-485/RS-422 WIRING
ISO VCC1
B
D2
D1
D1, D2
1N914
VCC2
VCC1
ISO RO DRV
A
B
A
SH
ISO DI IN
ISO DE IN
VCC3
SD
FS
GND1
ISO COM1
ISO DI DRV
ISO VCC2
ISO DE DRV
GND2
DE
VCC4
DI
ISO COM2
ISO RO LED
VCC5
RO
RL
R4
R5
R1
R2
16
14
12
5
7
13
15
18
3
8
2
DI
DE
RO
17
20
9
10
11
RECEIVER OUTPUT
6
4
R8
100
C3
0.01F
R6
200
R7
R3
BOOSTED V+
74HC240
DRIVER INPUT
DRIVER ENABLE
VIN
3.0V TO 3.6V
22F
6V
0.1F
C1
C2
MAX3480A/B
LOGIC GROUND
ISOLATION BARRIER
ISOLATION COMMON
MAX485
MAX487
MAX845
1
2
28
27
3
4
5
6
7
8
9
10
11
12
13
14
26
25
24
23
22
21
20
19
18
17
16
15
SHIELD (OPTIONAL)
NOTE: RESISTOR R8 PROTECTS
THE MAX3480 FROM TRANSIENT
CURRENTS BETWEEN SHIELD AND
“A” & “B”.
TWISTED PAIR
TO OTHER TRANSCEIVERS
TERMINATING RESISTOR
(ONE RESISTOR ON EACH END)
TWISTED PAIR
TO OTHER TRANSCEIVERS
Table 1. Pull-Up and LED Drive Resistors
PART
R1 (
)
R2 (
)
R3 (
)
R4 (
)
R5 (
)
R6 (
)
MAX3480A
150
130
680
3000
1000
200
MAX3480B
130
330
2000
2200
3000
200
R7 (
)
Open
470
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX3480BEPI+ 功能描述:RS-422/RS-485 接口 IC 3.3V Data Interface 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
MAX3480EACPI 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
MAX3480EACPI+ 功能描述:RS-422/RS-485 接口 IC 3.3V Data Interface 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
MAX3480EAEPI 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
MAX3480EAEPI+ 功能描述:RS-422/RS-485 接口 IC 3.3V Data Interface 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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