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参数资料
型号： MAX490ESA+T
厂商： Maxim Integrated Products
文件页数： 12/17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
SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1, 2)
300
1000
Figures 7 and 9, CL = 100pF, S2 closed
Figures 7 and 9, CL = 100pF, S1 closed
Figures 5 and 11, CL = 15pF, S2 closed,
A - B = 2V
CONDITIONS
ns
40
100
tZH(SHDN)
Driver Enable from Shutdown to
Output High (MAX481)
ns
Figures 5 and 11, CL = 15pF, S1 closed,
B - A = 2V
tZL(SHDN)
Receiver Enable from Shutdown
to Output Low (MAX481)
ns
40
100
tZL(SHDN)
Driver Enable from Shutdown to
Output Low (MAX481)
ns
300
1000
tZH(SHDN)
Receiver Enable from Shutdown
to Output High (MAX481)
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
tPLH
tSKEW
Figures 6 and 8, RDIFF = 54
Ω,
CL1 = CL2 = 100pF
tPHL
Figures 6 and 8, RDIFF = 54
Ω,
CL1 = CL2 = 100pF
Driver Input to Output
Driver Output Skew to Output
ns
100
800
ns
2000
MAX483/MAX487, Figures 7 and 9,
CL = 100pF, S2 closed
tZH(SHDN)
Driver Enable from Shutdown to
Output High
250
2000
ns
2500
MAX483/MAX487, Figures 5 and 11,
CL = 15pF, S1 closed
tZL(SHDN)
Receiver Enable from Shutdown
to Output Low
ns
2500
MAX483/MAX487, Figures 5 and 11,
CL = 15pF, S2 closed
tZH(SHDN)
Receiver Enable from Shutdown
to Output High
ns
2000
MAX483/MAX487, Figures 7 and 9,
CL = 100pF, S1 closed
tZL(SHDN)
Driver Enable from Shutdown to
Output Low
ns
50
200
600
MAX483/MAX487 (Note 5)
tSHDN
Time to Shutdown
tPHL
tPLH, tPHL < 50% of data period
Figures 5 and 11, CRL = 15pF, S2 closed
Figures 5 and 11, CRL = 15pF, S1 closed
Figures 5 and 11, CRL = 15pF, S2 closed
Figures 5 and 11, CRL = 15pF, S1 closed
Figures 7 and 9, CL = 15pF, S2 closed
Figures 6 and 10, RDIFF = 54
Ω,
CL1 = CL2 = 100pF
Figures 7 and 9, CL = 15pF, S1 closed
Figures 7 and 9, CL = 100pF, S1 closed
Figures 7 and 9, CL = 100pF, S2 closed
CONDITIONS
kbps
250
fMAX
250
800
2000
Maximum Data Rate
ns
20
50
tHZ
Receiver Disable Time from High
ns
250
800
2000
20
50
tLZ
Receiver Disable Time from Low
ns
20
50
tZH
Receiver Enable to Output High
ns
20
50
tZL
Receiver Enable to Output Low
ns
100
300
3000
tHZ
tSKD
Driver Disable Time from High
I tPLH - tPHL I Differential
Receiver Skew
Figures 6 and 10, RDIFF = 54
Ω,
CL1 = CL2 = 100pF
ns
300
3000
tLZ
Driver Disable Time from Low
ns
250
2000
tZL
Driver Enable to Output Low
ns
Figures 6 and 8, RDIFF = 54
Ω,
CL1 = CL2 = 100pF
ns
250
2000
tR, tF
250
2000
Driver Rise or Fall Time
ns
tPLH
Receiver Input to Output
250
2000
tZH
Driver Enable to Output High
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
4
Maxim Integrated
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