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| 型号： | MAX244EQH+TD |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 38/38页 |
| 文件大小： | 0K |
| 描述： | IC RS-232 DRVR/RCVR 44-PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 8/10 |
| 规程： | RS232 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC（16.59x16.59） |
| 包装： | 带卷 (TR) |
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+5V-Powered, Multichannel RS-232
Drivers/Receivers
Supply Voltage Range
4.75
5.25
V
Transmitter Enable Time
MAX225
10
20
tET
No load
MAX244–MAX249
11
30
510
30
MAX225
40
VCC Supply Current
(Normal Operation)
3k
Ω loads on
all outputs
MAX244–MAX249
57
mA
Transition Slew Rate
825
CL = 50pF to 2500pF, RL = 3k
Ω to 7kΩ, VCC = +5V,
TA = +25°C, measured from +3V to -3V or -3V to +3V
TA = TMIN to TMAX
CONDITIONS
50
V/s
MAX246–MAX249
(excludes charge-pump startup)
Shutdown Supply Current
A
5
tPHLT, Figure 1
1.3
3.5
s
tPLHT, Figure 1
1.5
3.5
Transmitter Disable Time
Transmitter Propagation Delay
TLL to RS-232 (Normal Operation)
s
tDT, Figure 4
100
ns
Transmitter + to - Propagation
Delay Difference (Normal Operation)
tPHLT - tPLHT
UNITS
MIN
TYP
MAX
350
PARAMETER
ns
Receiver + to - Propagation
Delay Difference (Normal Operation)
tPHLR - tPLHR
350
ns
4.5
5.5
MAX244–MAX249
MAX225
Leakage current
±1
Logic-low voltage
1.4
0.8
Control Input
Logic-high voltage
2.4
1.4
V
A
TA = +25°C
tPHLR, Figure 2
0.6
1.5
tPLHR, Figure 2
0.6
1.5
Receiver Propagation Delay
TLL to RS-232 (Normal Operation)
s
tPHLS, Figure 2
0.6
10
tPLHS, Figure 2
3.0
10
Receiver Propagation Delay
TLL to RS-232 (Low-Power Mode)
s
Receiver-Output Enable Time
tER, Figure 3
100
500
ns
Receiver-Output Disable Time
tDR, Figure 3
100
500
ns
MAX225/MAX245–MAX249
(includes charge-pump startup)
10
ms
POWER SUPPLY AND CONTROL LOGIC
AC CHARACTERISTICS
Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design.
Note 8: The 300
Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC =
0V is 10M
Ω as is implied by the leakage specification.
ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)
(MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1F; TA = TMIN to TMAX; unless
otherwise noted.) (Note 7)
Maxim Integrated
9
MAX220–MAX249
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