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| 型号： | MAX1487ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/17页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/RS422 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422，RS485 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
______________________________________________________________Pin Description
MAX481
MAX483
MAX485
MAX487
MAX1487
TOP VIEW
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.
TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.
1
2
3
4
8
5
VCC
GND
DI
DE
RE
RO
R
D
Rt
7
6
D
R
DE
RE
DI
RO
A
B
1
2
3
4
8
7
6
5
VCC
B
A
GND
DI
DE
RE
RO
DIP/SO
R
D
1
2
3
4
8
7
6
5
VCC
A
GND
DE
RE
B
RO
μMAX
B
A
DI
MAX481
MAX483
MAX485
MAX487
MAX1487
Figure 1. MAX481/MAX483/MAX485/MAX487/MAX1487 Pin Configuration and Typical Operating Circuit
MAX
—
5
6
7
8
—
2
—
1
3
—
MAX
4
5
6
7
—
8
—
1
—
2
—
DIP/SO
2
3
Receiver Output Enable. RO is enabled when RE is low; RO is
high impedance when RE is high.
3
4
Driver Output Enable. The driver outputs, Y and Z, are enabled
by bringing DE high. They are high impedance when DE is low. If
the driver outputs are enabled, the parts function as line drivers.
While they are high impedance, they function as line receivers if
RE is low.
DIP/SO
—
4
5
Driver Input. A low on DI forces output Y low and output Z high.
Similarly, a high on DI forces output Y high and output Z low.
5
6, 7
Ground
—
9
Noninverting Driver Output
—
10
Inverting Driver Output
—
3
4
6
—
Noninverting Receiver Input and Noninverting Driver Output
—
12
Noninverting Receiver Input
5
6
—
8
RE
DE
DI
GND
Y
Z
A
7
—
B
Inverting Receiver Input and Inverting Driver Output
—
7
11
B
Inverting Receiver Input
8
1
14
VCC
Positive Supply: 4.75V
≤ VCC ≤ 5.25V
—
1, 8, 13
N.C.
No Connect—not internally connected
FUNCTION
NAME
4
3
1
2
Receiver Output: If A > B by 200mV, RO will be high;
If A < B by 200mV, RO will be low.
2
RO
PIN
FUNCTION
NAME
MAX481/MAX483/
MAX485/MAX487/
MAX1487
MAX488/
MAX490
MAX489/
MAX491
MAX481/MAX483/MAX485
MAX487–MAX491/MAX1487
Maxim Integrated
7
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