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参数资料
| 型号： | SP3491EN-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485 FULL DUPLX 14NSOIC |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS485 |
| 电源电压： | 3.3V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC（窄型） |
| 包装： | 带卷 (TR) |
7
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP3490_349_02_0270
TEST CIRCUITS
R
V
OC
D
Vcc
V
OD
Figure . Driver DC Test Load Circuit
GENERATOR
(NOTE 1)
50
C
L
OUT
D
VCC
R
L =
60
CL= 15pF (NOTE 2)
Figure 3. Driver Differential Output Delay and
Transition Time Circuit.
GENERATOR
(NOTE 1)
50
S1
RL = 110
OUT
CL = 50pF
(NOTE 2)
VOM =
≈ 1.5V
VOH + VOL
2
D
Figure 4. Driver Enable and Disable Timing Circuit,
Output High
Figure 2. Driver Propagation Delay Test Circuit
GENERATOR
(NOTE 1)
50
VCC
S1
VDM
RL = 27
OUT
C L = 15pF
(NOTE 2)
VOM =
≈ 1.5V
VOH + VOL
2
D
Figure 5. Driver Enable and Disable Timing Circuit,
Output Low
GENERATOR
(NOTE 1)
50
S1
RL = 110
OUT
C L = 50pF
(NOTE 2)
D
0V OR 3V
VCC
GENERATOR
(NOTE 1)
50
1.5V
0V
VID
R
OUT
CL = 15pF
(NOTE 2)
VOM = VCC
2
Figure 6. Receiver Propagation Delay Test Circuit
1.5V
-1.5V
S3
VID
GENERATOR
(NOTE 1)
50
CL= 15pF
(NOTE 2)
R
1k
S1
S2
VCC
A/Y
D
DI = 0 or Vcc
B/Z
DE = 0 or Vcc
IOSD
100
-7V to +12V V
Figure 7. Receiver Enable and Disable Timing
Circuit
Figure 8. Driver Short Circuit Current Limit Test
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| SP3491EP | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:+3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate |
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| SP3493CN | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:+3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers |
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