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参数资料
| 型号： | LTC1482CS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/16页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485 LOWPWR 8-SOIC |
| 标准包装： | 100 |
| 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： | 管件 |
| 产品目录页面： | 1354 (CN2011-ZH PDF) |
9
LTC1482
FU CTIO TABLES
U
Driver Enabled (DE = 1)
DI/SHDN
A
B
RO
CD
00
1
0
11
0
1
0
X
A Shorted to B
1
Driver Disabled (DE = 0, Notes 1, 2)
DI/SHDN
A – B
RO
CD
0
X (Note 3)
Z
1 (Internal Pull-Up)
1VTHCD(MIN) < (A – B) < VTHCD(MAX)
11
1
A and B are Open
1
A and B are Shorted
1
1VTHCD(MIN) ≥ (A – B) ≥ VTHCD(MAX)
00
and (A – B)
≤ VTHRO(MIN)
1VTHCD(MIN) ≥ (A – B) ≥ VTHCD(MAX)
10
and (A – B)
≥ VTHRO(MAX)
X = Don’t Care
Z = High Impedance
Note 1: DE = 0, DI/SHDN = 0 puts the part in ICC shutdown and the supply
current drawn by the VCC pin drops to 20A max. The receiver is always
alive except in shutdown.
Note 2: The table is valid regardless of the presence of an external
termination resistor.
Note 3: Although the RO and the driver outputs are three-stated, the A and
B pins each present a 22k
receiver input resistance to ground.
TEST CIRCUITS
RECEIVER
OUTPUT
CL
1k
S1
S2
TEST POINT
VCC
1k
1482 F03
VOD
A
B
R
VOC
1482 F01
Figure 1. Driver DC Test Load #1
Figure 3. Receiver Timing Test Load
VOD3
A
B
375
375
60
VTST
–7V TO 12V
1482 F02
Figure 2. Driver DC Test Load #2
Figure 5. Driver Timing Test Load
OUTPUT
UNDER TEST
CL
S1
S2
VCC
500
1482 F05
Figure 4. Driver/Receiver Timing Test Load
DE
A
B
DI
RDIFF
VCC
CL1
CL2
RO
CD
1k
15pF
A
B
1482 F04
(DE = 0, DI/SHDN = 0) or to disable the driver while keeping
the receiver alive (DE = 0, DI/SHDN = 1). When the driver
is enabled (DE = 1), DI/SHDN = 0 forces the A output low
and the B output high. DI/SHDN = 1 forces the A output
high and the B output low.
GND (Pin 5): Ground.
A (Pin 6): Driver Output/Receiver Input. The input resis-
tance is typically 22k when the driver is disabled (DE = 0).
When the driver is enabled, the A output follows the logic
level at the DI/SHDN pin.
B (Pin 7): Driver Output/Receiver Input. The input resis-
tance is typically 22k when the driver is disabled (DE = 0).
When the driver is enabled, the B output is inverted from
the logic level at the DI/SHDN pin.
VCC (Pin 8): Positive Supply. 4.75V < VCC < 5.25V. A 0.1F
bypass capacitor is recommended.
PIN FUNCTIONS
UU
U
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| LTC1482IS8 | 功能描述:IC TXRX RS485 LOWPWR 8-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LTC1482IS8#PBF | 功能描述:IC TXRX RS485 LOWPWR 8-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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